diff options
| author | Oxore <oxore@protonmail.com> | 2023-03-05 20:20:45 +0300 |
|---|---|---|
| committer | Oxore <oxore@protonmail.com> | 2023-03-05 20:20:45 +0300 |
| commit | ea807de65b0485ac58b6eae576209c64d4d5c4e9 (patch) | |
| tree | b4264d20e1d700cfd9e0ece9d847a825dd1dfc03 /Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c | |
| parent | dd01e7ed22cea652061f0d12cecf929e04b285e9 (diff) | |
Split app code and third party libraries
Diffstat (limited to 'Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c')
| -rw-r--r-- | Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c | 2097 |
1 files changed, 0 insertions, 2097 deletions
diff --git a/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c b/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c deleted file mode 100644 index 7bb2f71..0000000 --- a/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_usart.c +++ /dev/null @@ -1,2097 +0,0 @@ -/** - ****************************************************************************** - * @file stm32f0xx_usart.c - * @author MCD Application Team - * @version V1.3.0 - * @date 16-January-2014 - * @brief This file provides firmware functions to manage the following - * functionalities of the Universal synchronous asynchronous receiver - * transmitter (USART): - * + Initialization and Configuration - * + STOP Mode - * + AutoBaudRate - * + Data transfers - * + Multi-Processor Communication - * + LIN mode - * + Half-duplex mode - * + Smartcard mode - * + IrDA mode - * + RS485 mode - * + DMA transfers management - * + Interrupts and flags management - * - * @verbatim - =============================================================================== - ##### How to use this driver ##### - =============================================================================== - [..] - (#) Enable peripheral clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE) - function for USART1 or using RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE) - function for USART2 and USART3. - (#) According to the USART mode, enable the GPIO clocks using - RCC_AHBPeriphClockCmd() function. (The I/O can be TX, RX, CTS, - or and SCLK). - (#) Peripheral's alternate function: - (++) Connect the pin to the desired peripherals' Alternate - Function (AF) using GPIO_PinAFConfig() function. - (++) Configure the desired pin in alternate function by: - GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF. - (++) Select the type, pull-up/pull-down and output speed via - GPIO_PuPd, GPIO_OType and GPIO_Speed members. - (++) Call GPIO_Init() function. - (#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware - flow control and Mode(Receiver/Transmitter) using the SPI_Init() - function. - (#) For synchronous mode, enable the clock and program the polarity, - phase and last bit using the USART_ClockInit() function. - (#) Enable the NVIC and the corresponding interrupt using the function - USART_ITConfig() if you need to use interrupt mode. - (#) When using the DMA mode: - (++) Configure the DMA using DMA_Init() function. - (++) Active the needed channel Request using USART_DMACmd() function. - (#) Enable the USART using the USART_Cmd() function. - (#) Enable the DMA using the DMA_Cmd() function, when using DMA mode. - [..] - Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections - for more details. - -@endverbatim - - ****************************************************************************** - * @attention - * - * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> - * - * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); - * You may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.st.com/software_license_agreement_liberty_v2 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - ****************************************************************************** - */ - -/* Includes ------------------------------------------------------------------*/ -#include "stm32f0xx_usart.h" -#include "stm32f0xx_rcc.h" -#include "stm32f0xx_conf.h" - -/** @addtogroup STM32F0xx_StdPeriph_Driver - * @{ - */ - -/** @defgroup USART - * @brief USART driver modules - * @{ - */ - -/* Private typedef -----------------------------------------------------------*/ -/* Private define ------------------------------------------------------------*/ - -/*!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) */ -#define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M | USART_CR1_PCE | \ - USART_CR1_PS | USART_CR1_TE | \ - USART_CR1_RE)) - -/*!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) */ -#define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN | USART_CR2_CPOL | \ - USART_CR2_CPHA | USART_CR2_LBCL)) - -/*!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) */ -#define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE)) - -/*!< USART Interrupts mask */ -#define IT_MASK ((uint32_t)0x000000FF) - -/* Private macro -------------------------------------------------------------*/ -/* Private variables ---------------------------------------------------------*/ -/* Private function prototypes -----------------------------------------------*/ -/* Private functions ---------------------------------------------------------*/ - -/** @defgroup USART_Private_Functions - * @{ - */ - -/** @defgroup USART_Group1 Initialization and Configuration functions - * @brief Initialization and Configuration functions - * -@verbatim - =============================================================================== - ##### Initialization and Configuration functions ##### - =============================================================================== - [..] - This subsection provides a set of functions allowing to initialize the USART - in asynchronous and in synchronous modes. - (+) For the asynchronous mode only these parameters can be configured: - (++) Baud Rate. - (++) Word Length. - (++) Stop Bit. - (++) Parity: If the parity is enabled, then the MSB bit of the data written - in the data register is transmitted but is changed by the parity bit. - Depending on the frame length defined by the M bit (8-bits or 9-bits), - the possible USART frame formats are as listed in the following table: - - +-------------------------------------------------------------+ - | M bit | PCE bit | USART frame | - |---------------------|---------------------------------------| - | 0 | 0 | | SB | 8 bit data | STB | | - |---------|-----------|---------------------------------------| - | 0 | 1 | | SB | 7 bit data | PB | STB | | - |---------|-----------|---------------------------------------| - | 1 | 0 | | SB | 9 bit data | STB | | - |---------|-----------|---------------------------------------| - | 1 | 1 | | SB | 8 bit data | PB | STB | | - +-------------------------------------------------------------+ - - (++) Hardware flow control. - (++) Receiver/transmitter modes. - [..] The USART_Init() function follows the USART asynchronous configuration - procedure(details for the procedure are available in reference manual. - (+) For the synchronous mode in addition to the asynchronous mode parameters - these parameters should be also configured: - (++) USART Clock Enabled. - (++) USART polarity. - (++) USART phase. - (++) USART LastBit. - [..] These parameters can be configured using the USART_ClockInit() function. - -@endverbatim - * @{ - */ - -/** - * @brief Deinitializes the USARTx peripheral registers to their default reset values. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @retval None - */ -void USART_DeInit(USART_TypeDef* USARTx) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - - if (USARTx == USART1) - { - RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE); - RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE); - } - else if (USARTx == USART2) - { - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE); - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE); - } - else if (USARTx == USART3) - { - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE); - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE); - } - else - { - if (USARTx == USART4) - { - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, ENABLE); - RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, DISABLE); - } - } -} - -/** - * @brief Initializes the USARTx peripheral according to the specified - * parameters in the USART_InitStruct . - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_InitStruct: pointer to a USART_InitTypeDef structure that contains - * the configuration information for the specified USART peripheral. - * @retval None - */ -void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct) -{ - uint32_t divider = 0, apbclock = 0, tmpreg = 0; - RCC_ClocksTypeDef RCC_ClocksStatus; - - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate)); - assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength)); - assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits)); - assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity)); - assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode)); - assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl)); - - /* Disable USART */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE); - - /*---------------------------- USART CR2 Configuration -----------------------*/ - tmpreg = USARTx->CR2; - /* Clear STOP[13:12] bits */ - tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP); - - /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/ - /* Set STOP[13:12] bits according to USART_StopBits value */ - tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits; - - /* Write to USART CR2 */ - USARTx->CR2 = tmpreg; - - /*---------------------------- USART CR1 Configuration -----------------------*/ - tmpreg = USARTx->CR1; - /* Clear M, PCE, PS, TE and RE bits */ - tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK); - - /* Configure the USART Word Length, Parity and mode ----------------------- */ - /* Set the M bits according to USART_WordLength value */ - /* Set PCE and PS bits according to USART_Parity value */ - /* Set TE and RE bits according to USART_Mode value */ - tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity | - USART_InitStruct->USART_Mode; - - /* Write to USART CR1 */ - USARTx->CR1 = tmpreg; - - /*---------------------------- USART CR3 Configuration -----------------------*/ - tmpreg = USARTx->CR3; - /* Clear CTSE and RTSE bits */ - tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK); - - /* Configure the USART HFC -------------------------------------------------*/ - /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */ - tmpreg |= USART_InitStruct->USART_HardwareFlowControl; - - /* Write to USART CR3 */ - USARTx->CR3 = tmpreg; - - /*---------------------------- USART BRR Configuration -----------------------*/ - /* Configure the USART Baud Rate -------------------------------------------*/ - RCC_GetClocksFreq(&RCC_ClocksStatus); - - if (USARTx == USART1) - { - apbclock = RCC_ClocksStatus.USART1CLK_Frequency; - } - else if (USARTx == USART2) - { - apbclock = RCC_ClocksStatus.USART2CLK_Frequency; - } - else - { - apbclock = RCC_ClocksStatus.PCLK_Frequency; - } - - /* Determine the integer part */ - if ((USARTx->CR1 & USART_CR1_OVER8) != 0) - { - /* (divider * 10) computing in case Oversampling mode is 8 Samples */ - divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate)); - tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate)); - } - else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */ - { - /* (divider * 10) computing in case Oversampling mode is 16 Samples */ - divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate)); - tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate)); - } - - /* round the divider : if fractional part i greater than 0.5 increment divider */ - if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2) - { - divider++; - } - - /* Implement the divider in case Oversampling mode is 8 Samples */ - if ((USARTx->CR1 & USART_CR1_OVER8) != 0) - { - /* get the LSB of divider and shift it to the right by 1 bit */ - tmpreg = (divider & (uint16_t)0x000F) >> 1; - - /* update the divider value */ - divider = (divider & (uint16_t)0xFFF0) | tmpreg; - } - - /* Write to USART BRR */ - USARTx->BRR = (uint16_t)divider; -} - -/** - * @brief Fills each USART_InitStruct member with its default value. - * @param USART_InitStruct: pointer to a USART_InitTypeDef structure - * which will be initialized. - * @retval None - */ -void USART_StructInit(USART_InitTypeDef* USART_InitStruct) -{ - /* USART_InitStruct members default value */ - USART_InitStruct->USART_BaudRate = 9600; - USART_InitStruct->USART_WordLength = USART_WordLength_8b; - USART_InitStruct->USART_StopBits = USART_StopBits_1; - USART_InitStruct->USART_Parity = USART_Parity_No ; - USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx; - USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None; -} - -/** - * @brief Initializes the USARTx peripheral Clock according to the - * specified parameters in the USART_ClockInitStruct. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef - * structure that contains the configuration information for the specified - * USART peripheral. - * @retval None - */ -void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct) -{ - uint32_t tmpreg = 0; - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock)); - assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL)); - assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA)); - assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit)); -/*---------------------------- USART CR2 Configuration -----------------------*/ - tmpreg = USARTx->CR2; - /* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */ - tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK); - /* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/ - /* Set CLKEN bit according to USART_Clock value */ - /* Set CPOL bit according to USART_CPOL value */ - /* Set CPHA bit according to USART_CPHA value */ - /* Set LBCL bit according to USART_LastBit value */ - tmpreg |= (uint32_t)(USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL | - USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit); - /* Write to USART CR2 */ - USARTx->CR2 = tmpreg; -} - -/** - * @brief Fills each USART_ClockInitStruct member with its default value. - * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef - * structure which will be initialized. - * @retval None - */ -void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct) -{ - /* USART_ClockInitStruct members default value */ - USART_ClockInitStruct->USART_Clock = USART_Clock_Disable; - USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low; - USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge; - USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable; -} - -/** - * @brief Enables or disables the specified USART peripheral. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USARTx peripheral. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the selected USART by setting the UE bit in the CR1 register */ - USARTx->CR1 |= USART_CR1_UE; - } - else - { - /* Disable the selected USART by clearing the UE bit in the CR1 register */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE); - } -} - -/** - * @brief Enables or disables the USART's transmitter or receiver. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_Direction: specifies the USART direction. - * This parameter can be any combination of the following values: - * @arg USART_Mode_Tx: USART Transmitter - * @arg USART_Mode_Rx: USART Receiver - * @param NewState: new state of the USART transfer direction. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_MODE(USART_DirectionMode)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the USART's transfer interface by setting the TE and/or RE bits - in the USART CR1 register */ - USARTx->CR1 |= USART_DirectionMode; - } - else - { - /* Disable the USART's transfer interface by clearing the TE and/or RE bits - in the USART CR3 register */ - USARTx->CR1 &= (uint32_t)~USART_DirectionMode; - } -} - -/** - * @brief Enables or disables the USART's 8x oversampling mode. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USART 8x oversampling mode. - * This parameter can be: ENABLE or DISABLE. - * @note This function has to be called before calling USART_Init() function - * in order to have correct baudrate Divider value. - * @retval None - */ -void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */ - USARTx->CR1 |= USART_CR1_OVER8; - } - else - { - /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8); - } -} - -/** - * @brief Enables or disables the USART's one bit sampling method. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USART one bit sampling method. - * This parameter can be: ENABLE or DISABLE. - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the one bit method by setting the ONEBITE bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_ONEBIT; - } - else - { - /* Disable the one bit method by clearing the ONEBITE bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT); - } -} - -/** - * @brief Enables or disables the USART's most significant bit first - * transmitted/received following the start bit. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USART most significant bit first - * transmitted/received following the start bit. - * This parameter can be: ENABLE or DISABLE. - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the most significant bit first transmitted/received following the - start bit by setting the MSBFIRST bit in the CR2 register */ - USARTx->CR2 |= USART_CR2_MSBFIRST; - } - else - { - /* Disable the most significant bit first transmitted/received following the - start bit by clearing the MSBFIRST bit in the CR2 register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST); - } -} - -/** - * @brief Enables or disables the binary data inversion. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new defined levels for the USART data. - * This parameter can be: - * @arg ENABLE: Logical data from the data register are send/received in negative - * logic (1=L, 0=H). The parity bit is also inverted. - * @arg DISABLE: Logical data from the data register are send/received in positive - * logic (1=H, 0=L) - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the binary data inversion feature by setting the DATAINV bit in - the CR2 register */ - USARTx->CR2 |= USART_CR2_DATAINV; - } - else - { - /* Disable the binary data inversion feature by clearing the DATAINV bit in - the CR2 register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV); - } -} - -/** - * @brief Enables or disables the Pin(s) active level inversion. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_InvPin: specifies the USART pin(s) to invert. - * This parameter can be any combination of the following values: - * @arg USART_InvPin_Tx: USART Tx pin active level inversion. - * @arg USART_InvPin_Rx: USART Rx pin active level inversion. - * @param NewState: new active level status for the USART pin(s). - * This parameter can be: - * @arg ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1). - * @arg DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0). - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_INVERSTION_PIN(USART_InvPin)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the active level inversion for selected pins by setting the TXINV - and/or RXINV bits in the USART CR2 register */ - USARTx->CR2 |= USART_InvPin; - } - else - { - /* Disable the active level inversion for selected requests by clearing the - TXINV and/or RXINV bits in the USART CR2 register */ - USARTx->CR2 &= (uint32_t)~USART_InvPin; - } -} - -/** - * @brief Enables or disables the swap Tx/Rx pins. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USARTx TX/RX pins pinout. - * This parameter can be: - * @arg ENABLE: The TX and RX pins functions are swapped. - * @arg DISABLE: TX/RX pins are used as defined in standard pinout - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the SWAP feature by setting the SWAP bit in the CR2 register */ - USARTx->CR2 |= USART_CR2_SWAP; - } - else - { - /* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP); - } -} - -/** - * @brief Enables or disables the receiver Time Out feature. - * @param USARTx: where x can be 1 to select the USART peripheral. - * @param NewState: new state of the USARTx receiver Time Out. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the receiver time out feature by setting the RTOEN bit in the CR2 - register */ - USARTx->CR2 |= USART_CR2_RTOEN; - } - else - { - /* Disable the receiver time out feature by clearing the RTOEN bit in the CR2 - register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN); - } -} - -/** - * @brief Sets the receiver Time Out value. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param USART_ReceiverTimeOut: specifies the Receiver Time Out value. - * @retval None - */ -void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut)); - - /* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR - register */ - USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO); - /* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR - register */ - USARTx->RTOR |= USART_ReceiverTimeOut; -} - -/** - * @brief Sets the system clock prescaler. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param USART_Prescaler: specifies the prescaler clock. - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - - /* Clear the USART prescaler */ - USARTx->GTPR &= USART_GTPR_GT; - /* Set the USART prescaler */ - USARTx->GTPR |= USART_Prescaler; -} - -/** - * @} - */ - - -/** @defgroup USART_Group2 STOP Mode functions - * @brief STOP Mode functions - * -@verbatim - =============================================================================== - ##### STOP Mode functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage - WakeUp from STOP mode. - - [..] The USART is able to WakeUp from Stop Mode if USART clock is set to HSI - or LSI. - - [..] The WakeUp source is configured by calling USART_StopModeWakeUpSourceConfig() - function. - - [..] After configuring the source of WakeUp and before entering in Stop Mode - USART_STOPModeCmd() function should be called to allow USART WakeUp. - -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the specified USART peripheral in STOP Mode. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param NewState: new state of the USARTx peripheral state in stop mode. - * This parameter can be: ENABLE or DISABLE. - * @note This function has to be called when USART clock is set to HSI or LSE. - * @retval None - */ -void USART_STOPModeCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the selected USART in STOP mode by setting the UESM bit in the CR1 - register */ - USARTx->CR1 |= USART_CR1_UESM; - } - else - { - /* Disable the selected USART in STOP mode by clearing the UE bit in the CR1 - register */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UESM); - } -} - -/** - * @brief Selects the USART WakeUp method form stop mode. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param USART_WakeUp: specifies the selected USART wakeup method. - * This parameter can be one of the following values: - * @arg USART_WakeUpSource_AddressMatch: WUF active on address match. - * @arg USART_WakeUpSource_StartBit: WUF active on Start bit detection. - * @arg USART_WakeUpSource_RXNE: WUF active on RXNE. - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_StopModeWakeUpSourceConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUpSource) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_STOPMODE_WAKEUPSOURCE(USART_WakeUpSource)); - - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_WUS); - USARTx->CR3 |= USART_WakeUpSource; -} - -/** - * @} - */ - - -/** @defgroup USART_Group3 AutoBaudRate functions - * @brief AutoBaudRate functions - * -@verbatim - =============================================================================== - ##### AutoBaudRate functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage - the AutoBaudRate detections. - - [..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd () - The character patterns used to calculate baudrate must be chosen by calling - USART_AutoBaudRateConfig() function. These function take as parameter : - (#)USART_AutoBaudRate_StartBit : any character starting with a bit 1. - (#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern. - - [..] At any later time, another request for AutoBaudRate detection can be performed - using USART_RequestCmd() function. - - [..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate - that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag - indicate that this procedure is completed without success. USART_GetFlagStatus () - function should be used to monitor the status of these flags. - -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the Auto Baud Rate. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param NewState: new state of the USARTx auto baud rate. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the auto baud rate feature by setting the ABREN bit in the CR2 - register */ - USARTx->CR2 |= USART_CR2_ABREN; - } - else - { - /* Disable the auto baud rate feature by clearing the ABREN bit in the CR2 - register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN); - } -} - -/** - * @brief Selects the USART auto baud rate method. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param USART_AutoBaudRate: specifies the selected USART auto baud rate method. - * This parameter can be one of the following values: - * @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement. - * @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement. - * @note This function has to be called before calling USART_Cmd() function. - * @retval None - */ -void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate)); - - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE); - USARTx->CR2 |= USART_AutoBaudRate; -} - -/** - * @} - */ - - -/** @defgroup USART_Group4 Data transfers functions - * @brief Data transfers functions - * -@verbatim - =============================================================================== - ##### Data transfers functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage - the USART data transfers. - [..] During an USART reception, data shifts in least significant bit first - through the RX pin. When a transmission is taking place, a write instruction to - the USART_TDR register stores the data in the shift register. - [..] The read access of the USART_RDR register can be done using - the USART_ReceiveData() function and returns the RDR value. - Whereas a write access to the USART_TDR can be done using USART_SendData() - function and stores the written data into TDR. - -@endverbatim - * @{ - */ - -/** - * @brief Transmits single data through the USARTx peripheral. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param Data: the data to transmit. - * @retval None - */ -void USART_SendData(USART_TypeDef* USARTx, uint16_t Data) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DATA(Data)); - - /* Transmit Data */ - USARTx->TDR = (Data & (uint16_t)0x01FF); -} - -/** - * @brief Returns the most recent received data by the USARTx peripheral. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @retval The received data. - */ -uint16_t USART_ReceiveData(USART_TypeDef* USARTx) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - - /* Receive Data */ - return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF); -} - -/** - * @} - */ - -/** @defgroup USART_Group5 MultiProcessor Communication functions - * @brief Multi-Processor Communication functions - * -@verbatim - =============================================================================== - ##### Multi-Processor Communication functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - multiprocessor communication. - [..] For instance one of the USARTs can be the master, its TX output is - connected to the RX input of the other USART. The others are slaves, - their respective TX outputs are logically ANDed together and connected - to the RX input of the master. USART multiprocessor communication is - possible through the following procedure: - (#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity, - Mode transmitter or Mode receiver and hardware flow control values - using the USART_Init() function. - (#) Configures the USART address using the USART_SetAddress() function. - (#) Configures the wake up methode (USART_WakeUp_IdleLine or - USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only - for the slaves. - (#) Enable the USART using the USART_Cmd() function. - (#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd() - function. - [..] The USART Slave exit from mute mode when receive the wake up condition. - -@endverbatim - * @{ - */ - -/** - * @brief Sets the address of the USART node. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_Address: Indicates the address of the USART node. - * @retval None - */ -void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - - /* Clear the USART address */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD); - /* Set the USART address node */ - USARTx->CR2 |=((uint32_t)USART_Address << (uint32_t)0x18); -} - -/** - * @brief Enables or disables the USART's mute mode. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USART mute mode. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the USART mute mode by setting the MME bit in the CR1 register */ - USARTx->CR1 |= USART_CR1_MME; - } - else - { - /* Disable the USART mute mode by clearing the MME bit in the CR1 register */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME); - } -} - -/** - * @brief Selects the USART WakeUp method from mute mode. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_WakeUp: specifies the USART wakeup method. - * This parameter can be one of the following values: - * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection - * @arg USART_WakeUp_AddressMark: WakeUp by an address mark - * @retval None - */ -void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp)); - - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE); - USARTx->CR1 |= USART_WakeUp; -} - -/** - * @brief Configure the the USART Address detection length. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_AddressLength: specifies the USART address length detection. - * This parameter can be one of the following values: - * @arg USART_AddressLength_4b: 4-bit address length detection - * @arg USART_AddressLength_7b: 7-bit address length detection - * @retval None - */ -void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength)); - - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7); - USARTx->CR2 |= USART_AddressLength; -} - -/** - * @} - */ - -/** @defgroup USART_Group6 LIN mode functions - * @brief LIN mode functions - * -@verbatim - =============================================================================== - ##### LIN mode functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - LIN Mode communication. - [..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance - with the LIN standard. - [..] Only this LIN Feature is supported by the USART IP: - (+) LIN Master Synchronous Break send capability and LIN slave break - detection capability : 13-bit break generation and 10/11 bit break - detection. - [..] USART LIN Master transmitter communication is possible through the - following procedure: - (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, - Mode transmitter or Mode receiver and hardware flow control values - using the USART_Init() function. - (#) Enable the LIN mode using the USART_LINCmd() function. - (#) Enable the USART using the USART_Cmd() function. - (#) Send the break character using USART_SendBreak() function. - [..] USART LIN Master receiver communication is possible through the - following procedure: - (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity, - Mode transmitter or Mode receiver and hardware flow control values - using the USART_Init() function. - (#) Configures the break detection length - using the USART_LINBreakDetectLengthConfig() function. - (#) Enable the LIN mode using the USART_LINCmd() function. - -@- In LIN mode, the following bits must be kept cleared: - (+@) CLKEN in the USART_CR2 register. - (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register. - (#) Enable the USART using the USART_Cmd() function. - -@endverbatim - * @{ - */ - -/** - * @brief Sets the USART LIN Break detection length. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param USART_LINBreakDetectLength: specifies the LIN break detection length. - * This parameter can be one of the following values: - * @arg USART_LINBreakDetectLength_10b: 10-bit break detection - * @arg USART_LINBreakDetectLength_11b: 11-bit break detection - * @retval None - */ -void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint32_t USART_LINBreakDetectLength) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength)); - - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LBDL); - USARTx->CR2 |= USART_LINBreakDetectLength; -} - -/** - * @brief Enables or disables the USART's LIN mode. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is available only for STM32F072 devices. - * @param NewState: new state of the USART LIN mode. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the LIN mode by setting the LINEN bit in the CR2 register */ - USARTx->CR2 |= USART_CR2_LINEN; - } - else - { - /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */ - USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LINEN); - } -} - -/** - * @} - */ - -/** @defgroup USART_Group7 Halfduplex mode function - * @brief Half-duplex mode function - * -@verbatim - =============================================================================== - ##### Half-duplex mode function ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - Half-duplex communication. - [..] The USART can be configured to follow a single-wire half-duplex protocol - where the TX and RX lines are internally connected. - [..] USART Half duplex communication is possible through the following procedure: - (#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter - or Mode receiver and hardware flow control values using the USART_Init() - function. - (#) Configures the USART address using the USART_SetAddress() function. - (#) Enable the half duplex mode using USART_HalfDuplexCmd() function. - (#) Enable the USART using the USART_Cmd() function. - -@- The RX pin is no longer used. - -@- In Half-duplex mode the following bits must be kept cleared: - (+@) LINEN and CLKEN bits in the USART_CR2 register. - (+@) SCEN and IREN bits in the USART_CR3 register. - -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the USART's Half Duplex communication. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the USART Communication. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_HDSEL; - } - else - { - /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL); - } -} - -/** - * @} - */ - - -/** @defgroup USART_Group8 Smartcard mode functions - * @brief Smartcard mode functions - * -@verbatim - =============================================================================== - ##### Smartcard mode functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - Smartcard communication. - [..] The Smartcard interface is designed to support asynchronous protocol - Smartcards as defined in the ISO 7816-3 standard. The USART can provide - a clock to the smartcard through the SCLK output. In smartcard mode, - SCLK is not associated to the communication but is simply derived from - the internal peripheral input clock through a 5-bit prescaler. - [..] Smartcard communication is possible through the following procedure: - (#) Configures the Smartcard Prsecaler using the USART_SetPrescaler() - function. - (#) Configures the Smartcard Guard Time using the USART_SetGuardTime() - function. - (#) Program the USART clock using the USART_ClockInit() function as following: - (++) USART Clock enabled. - (++) USART CPOL Low. - (++) USART CPHA on first edge. - (++) USART Last Bit Clock Enabled. - (#) Program the Smartcard interface using the USART_Init() function as - following: - (++) Word Length = 9 Bits. - (++) 1.5 Stop Bit. - (++) Even parity. - (++) BaudRate = 12096 baud. - (++) Hardware flow control disabled (RTS and CTS signals). - (++) Tx and Rx enabled - (#) Optionally you can enable the parity error interrupt using - the USART_ITConfig() function. - (#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function. - (#) Enable the Smartcard interface using the USART_SmartCardCmd() function. - (#) Enable the USART using the USART_Cmd() function. - [..] - Please refer to the ISO 7816-3 specification for more details. - [..] - (@) It is also possible to choose 0.5 stop bit for receiving but it is - recommended to use 1.5 stop bits for both transmitting and receiving - to avoid switching between the two configurations. - (@) In smartcard mode, the following bits must be kept cleared: - (+@) LINEN bit in the USART_CR2 register. - (+@) HDSEL and IREN bits in the USART_CR3 register. - -@endverbatim - * @{ - */ - -/** - * @brief Sets the specified USART guard time. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param USART_GuardTime: specifies the guard time. - * @retval None - */ -void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - - /* Clear the USART Guard time */ - USARTx->GTPR &= USART_GTPR_PSC; - /* Set the USART guard time */ - USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08); -} - -/** - * @brief Enables or disables the USART's Smart Card mode. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param NewState: new state of the Smart Card mode. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - if (NewState != DISABLE) - { - /* Enable the SC mode by setting the SCEN bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_SCEN; - } - else - { - /* Disable the SC mode by clearing the SCEN bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCEN); - } -} - -/** - * @brief Enables or disables NACK transmission. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param NewState: new state of the NACK transmission. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - if (NewState != DISABLE) - { - /* Enable the NACK transmission by setting the NACK bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_NACK; - } - else - { - /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_NACK); - } -} - -/** - * @brief Sets the Smart Card number of retries in transmit and receive. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param USART_AutoCount: specifies the Smart Card auto retry count. - * @retval None - */ -void USART_SetAutoRetryCount(USART_TypeDef* USARTx, uint8_t USART_AutoCount) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_AUTO_RETRY_COUNTER(USART_AutoCount)); - /* Clear the USART auto retry count */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCARCNT); - /* Set the USART auto retry count*/ - USARTx->CR3 |= (uint32_t)((uint32_t)USART_AutoCount << 0x11); -} - -/** - * @brief Sets the Smart Card Block length. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param USART_BlockLength: specifies the Smart Card block length. - * @retval None - */ -void USART_SetBlockLength(USART_TypeDef* USARTx, uint8_t USART_BlockLength) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - - /* Clear the Smart card block length */ - USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_BLEN); - /* Set the Smart Card block length */ - USARTx->RTOR |= (uint32_t)((uint32_t)USART_BlockLength << 0x18); -} - -/** - * @} - */ - -/** @defgroup USART_Group9 IrDA mode functions - * @brief IrDA mode functions - * -@verbatim - =============================================================================== - ##### IrDA mode functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - IrDA communication. - [..] IrDA is a half duplex communication protocol. If the Transmitter is busy, - any data on the IrDA receive line will be ignored by the IrDA decoder - and if the Receiver is busy, data on the TX from the USART to IrDA will - not be encoded by IrDA. While receiving data, transmission should be - avoided as the data to be transmitted could be corrupted. - [..] IrDA communication is possible through the following procedure: - (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity, - Transmitter/Receiver modes and hardware flow control values using - the USART_Init() function. - (#) Configures the IrDA pulse width by configuring the prescaler using - the USART_SetPrescaler() function. - (#) Configures the IrDA USART_IrDAMode_LowPower or USART_IrDAMode_Normal - mode using the USART_IrDAConfig() function. - (#) Enable the IrDA using the USART_IrDACmd() function. - (#) Enable the USART using the USART_Cmd() function. - [..] - (@) A pulse of width less than two and greater than one PSC period(s) may or - may not be rejected. - (@) The receiver set up time should be managed by software. The IrDA physical - layer specification specifies a minimum of 10 ms delay between - transmission and reception (IrDA is a half duplex protocol). - (@) In IrDA mode, the following bits must be kept cleared: - (+@) LINEN, STOP and CLKEN bits in the USART_CR2 register. - (+@) SCEN and HDSEL bits in the USART_CR3 register. - -@endverbatim - * @{ - */ - -/** - * @brief Configures the USART's IrDA interface. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param USART_IrDAMode: specifies the IrDA mode. - * This parameter can be one of the following values: - * @arg USART_IrDAMode_LowPower - * @arg USART_IrDAMode_Normal - * @retval None - */ -void USART_IrDAConfig(USART_TypeDef* USARTx, uint32_t USART_IrDAMode) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_USART_IRDA_MODE(USART_IrDAMode)); - - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IRLP); - USARTx->CR3 |= USART_IrDAMode; -} - -/** - * @brief Enables or disables the USART's IrDA interface. - * @note This function is not available for STM32F030 devices. - * @param USARTx: where x can be 1or 2 to select the USART peripheral. - * @note USART2 is applicable only for STM32F072 devices. - * @param NewState: new state of the IrDA mode. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_12_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the IrDA mode by setting the IREN bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_IREN; - } - else - { - /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IREN); - } -} -/** - * @} - */ - -/** @defgroup USART_Group10 RS485 mode function - * @brief RS485 mode function - * -@verbatim - =============================================================================== - ##### RS485 mode functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to manage the USART - RS485 flow control. - [..] RS485 flow control (Driver enable feature) handling is possible through - the following procedure: - (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity, - Transmitter/Receiver modes and hardware flow control values using - the USART_Init() function. - (#) Enable the Driver Enable using the USART_DECmd() function. - (#) Configures the Driver Enable polarity using the USART_DEPolarityConfig() - function. - (#) Configures the Driver Enable assertion time using USART_SetDEAssertionTime() - function and deassertion time using the USART_SetDEDeassertionTime() - function. - (#) Enable the USART using the USART_Cmd() function. - -@- - (+@) The assertion and dessertion times are expressed in sample time units (1/8 or - 1/16 bit time, depending on the oversampling rate). - -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the USART's DE functionality. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param NewState: new state of the driver enable mode. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - if (NewState != DISABLE) - { - /* Enable the DE functionality by setting the DEM bit in the CR3 register */ - USARTx->CR3 |= USART_CR3_DEM; - } - else - { - /* Disable the DE functionality by clearing the DEM bit in the CR3 register */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM); - } -} - -/** - * @brief Configures the USART's DE polarity - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_DEPolarity: specifies the DE polarity. - * This parameter can be one of the following values: - * @arg USART_DEPolarity_Low - * @arg USART_DEPolarity_High - * @retval None - */ -void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DE_POLARITY(USART_DEPolarity)); - - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP); - USARTx->CR3 |= USART_DEPolarity; -} - -/** - * @brief Sets the specified RS485 DE assertion time - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_DEAssertionTime: specifies the time between the activation of - * the DE signal and the beginning of the start bit - * @retval None - */ -void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime)); - - /* Clear the DE assertion time */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT); - /* Set the new value for the DE assertion time */ - USARTx->CR1 |=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15); -} - -/** - * @brief Sets the specified RS485 DE deassertion time - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_DeassertionTime: specifies the time between the middle of the last - * stop bit in a transmitted message and the de-activation of the DE signal - * @retval None - */ -void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime)); - - /* Clear the DE deassertion time */ - USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT); - /* Set the new value for the DE deassertion time */ - USARTx->CR1 |=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10); -} - -/** - * @} - */ - -/** @defgroup USART_Group11 DMA transfers management functions - * @brief DMA transfers management functions - * -@verbatim - =============================================================================== - ##### DMA transfers management functions ##### - =============================================================================== - [..] This section provides two functions that can be used only in DMA mode. - [..] In DMA Mode, the USART communication can be managed by 2 DMA Channel - requests: - (#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request. - (#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request. - [..] In this Mode it is advised to use the following function: - (+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, - FunctionalState NewState). -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the USART's DMA interface. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_DMAReq: specifies the DMA request. - * This parameter can be any combination of the following values: - * @arg USART_DMAReq_Tx: USART DMA transmit request - * @arg USART_DMAReq_Rx: USART DMA receive request - * @param NewState: new state of the DMA Request sources. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DMAREQ(USART_DMAReq)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the DMA transfer for selected requests by setting the DMAT and/or - DMAR bits in the USART CR3 register */ - USARTx->CR3 |= USART_DMAReq; - } - else - { - /* Disable the DMA transfer for selected requests by clearing the DMAT and/or - DMAR bits in the USART CR3 register */ - USARTx->CR3 &= (uint32_t)~USART_DMAReq; - } -} - -/** - * @brief Enables or disables the USART's DMA interface when reception error occurs. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_DMAOnError: specifies the DMA status in case of reception error. - * This parameter can be any combination of the following values: - * @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA - * reception error is asserted. - * @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA - * reception error is asserted. - * @retval None - */ -void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_DMAONERROR(USART_DMAOnError)); - - /* Clear the DMA Reception error detection bit */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE); - /* Set the new value for the DMA Reception error detection bit */ - USARTx->CR3 |= USART_DMAOnError; -} - -/** - * @} - */ - -/** @defgroup USART_Group12 Interrupts and flags management functions - * @brief Interrupts and flags management functions - * -@verbatim - =============================================================================== - ##### Interrupts and flags management functions ##### - =============================================================================== - [..] This subsection provides a set of functions allowing to configure the - USART Interrupts sources, Requests and check or clear the flags or pending bits status. - The user should identify which mode will be used in his application to - manage the communication: Polling mode, Interrupt mode. - - *** Polling Mode *** - ==================== - [..] In Polling Mode, the SPI communication can be managed by these flags: - (#) USART_FLAG_REACK: to indicate the status of the Receive Enable - acknowledge flag - (#) USART_FLAG_TEACK: to indicate the status of the Transmit Enable - acknowledge flag. - (#) USART_FLAG_WU: to indicate the status of the Wake up flag. - (#) USART_FLAG_RWU: to indicate the status of the Receive Wake up flag. - (#) USART_FLAG_SBK: to indicate the status of the Send Break flag. - (#) USART_FLAG_CM: to indicate the status of the Character match flag. - (#) USART_FLAG_BUSY: to indicate the status of the Busy flag. - (#) USART_FLAG_ABRF: to indicate the status of the Auto baud rate flag. - (#) USART_FLAG_ABRE: to indicate the status of the Auto baud rate error flag. - (#) USART_FLAG_EOB: to indicate the status of the End of block flag. - (#) USART_FLAG_RTO: to indicate the status of the Receive time out flag. - (#) USART_FLAG_nCTSS: to indicate the status of the Inverted nCTS input - bit status. - (#) USART_FLAG_TXE: to indicate the status of the transmit buffer register. - (#) USART_FLAG_RXNE: to indicate the status of the receive buffer register. - (#) USART_FLAG_TC: to indicate the status of the transmit operation. - (#) USART_FLAG_IDLE: to indicate the status of the Idle Line. - (#) USART_FLAG_CTS: to indicate the status of the nCTS input. - (#) USART_FLAG_LBD: to indicate the status of the LIN break detection. - (#) USART_FLAG_NE: to indicate if a noise error occur. - (#) USART_FLAG_FE: to indicate if a frame error occur. - (#) USART_FLAG_PE: to indicate if a parity error occur. - (#) USART_FLAG_ORE: to indicate if an Overrun error occur. - [..] In this Mode it is advised to use the following functions: - (+) FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG). - (+) void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG). - - *** Interrupt Mode *** - ====================== - [..] In Interrupt Mode, the USART communication can be managed by 8 interrupt - sources and 10 pending bits: - (+) Pending Bits: - (##) USART_IT_WU: to indicate the status of the Wake up interrupt. - (##) USART_IT_CM: to indicate the status of Character match interrupt. - (##) USART_IT_EOB: to indicate the status of End of block interrupt. - (##) USART_IT_RTO: to indicate the status of Receive time out interrupt. - (##) USART_IT_CTS: to indicate the status of CTS change interrupt. - (##) USART_IT_LBD: to indicate the status of LIN Break detection interrupt. - (##) USART_IT_TC: to indicate the status of Transmission complete interrupt. - (##) USART_IT_IDLE: to indicate the status of IDLE line detected interrupt. - (##) USART_IT_ORE: to indicate the status of OverRun Error interrupt. - (##) USART_IT_NE: to indicate the status of Noise Error interrupt. - (##) USART_IT_FE: to indicate the status of Framing Error interrupt. - (##) USART_IT_PE: to indicate the status of Parity Error interrupt. - - (+) Interrupt Source: - (##) USART_IT_WU: specifies the interrupt source for Wake up interrupt. - (##) USART_IT_CM: specifies the interrupt source for Character match - interrupt. - (##) USART_IT_EOB: specifies the interrupt source for End of block - interrupt. - (##) USART_IT_RTO: specifies the interrupt source for Receive time-out - interrupt. - (##) USART_IT_CTS: specifies the interrupt source for CTS change interrupt. - (##) USART_IT_LBD: specifies the interrupt source for LIN Break - detection interrupt. - (##) USART_IT_TXE: specifies the interrupt source for Tansmit Data - Register empty interrupt. - (##) USART_IT_TC: specifies the interrupt source for Transmission - complete interrupt. - (##) USART_IT_RXNE: specifies the interrupt source for Receive Data - register not empty interrupt. - (##) USART_IT_IDLE: specifies the interrupt source for Idle line - detection interrupt. - (##) USART_IT_PE: specifies the interrupt source for Parity Error interrupt. - (##) USART_IT_ERR: specifies the interrupt source for Error interrupt - (Frame error, noise error, overrun error) - -@@- Some parameters are coded in order to use them as interrupt - source or as pending bits. - [..] In this Mode it is advised to use the following functions: - (+) void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState). - (+) ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT). - (+) void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT). - -@endverbatim - * @{ - */ - -/** - * @brief Enables or disables the specified USART interrupts. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled. - * This parameter can be one of the following values: - * @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices. - * @arg USART_IT_CM: Character match interrupt. - * @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices. - * @arg USART_IT_RTO: Receive time out interrupt. - * @arg USART_IT_CTS: CTS change interrupt. - * @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices. - * @arg USART_IT_TXE: Tansmit Data Register empty interrupt. - * @arg USART_IT_TC: Transmission complete interrupt. - * @arg USART_IT_RXNE: Receive Data register not empty interrupt. - * @arg USART_IT_IDLE: Idle line detection interrupt. - * @arg USART_IT_PE: Parity Error interrupt. - * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error) - * @param NewState: new state of the specified USARTx interrupts. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState) -{ - uint32_t usartreg = 0, itpos = 0, itmask = 0; - uint32_t usartxbase = 0; - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_CONFIG_IT(USART_IT)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - usartxbase = (uint32_t)USARTx; - - /* Get the USART register index */ - usartreg = (((uint16_t)USART_IT) >> 0x08); - - /* Get the interrupt position */ - itpos = USART_IT & IT_MASK; - itmask = (((uint32_t)0x01) << itpos); - - if (usartreg == 0x02) /* The IT is in CR2 register */ - { - usartxbase += 0x04; - } - else if (usartreg == 0x03) /* The IT is in CR3 register */ - { - usartxbase += 0x08; - } - else /* The IT is in CR1 register */ - { - } - if (NewState != DISABLE) - { - *(__IO uint32_t*)usartxbase |= itmask; - } - else - { - *(__IO uint32_t*)usartxbase &= ~itmask; - } -} - -/** - * @brief Enables the specified USART's Request. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_Request: specifies the USART request. - * This parameter can be any combination of the following values: - * @arg USART_Request_TXFRQ: Transmit data flush ReQuest - * @arg USART_Request_RXFRQ: Receive data flush ReQuest - * @arg USART_Request_MMRQ: Mute Mode ReQuest - * @arg USART_Request_SBKRQ: Send Break ReQuest - * @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest - * @param NewState: new state of the DMA interface when reception error occurs. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_REQUEST(USART_Request)); - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable the USART ReQuest by setting the dedicated request bit in the RQR - register.*/ - USARTx->RQR |= USART_Request; - } - else - { - /* Disable the USART ReQuest by clearing the dedicated request bit in the RQR - register.*/ - USARTx->RQR &= (uint32_t)~USART_Request; - } -} - -/** - * @brief Enables or disables the USART's Overrun detection. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_OVRDetection: specifies the OVR detection status in case of OVR error. - * This parameter can be any combination of the following values: - * @arg USART_OVRDetection_Enable: OVR error detection enabled when - * the USART OVR error is asserted. - * @arg USART_OVRDetection_Disable: OVR error detection disabled when - * the USART OVR error is asserted. - * @retval None - */ -void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_OVRDETECTION(USART_OVRDetection)); - - /* Clear the OVR detection bit */ - USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS); - /* Set the new value for the OVR detection bit */ - USARTx->CR3 |= USART_OVRDetection; -} - -/** - * @brief Checks whether the specified USART flag is set or not. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_FLAG: specifies the flag to check. - * This parameter can be one of the following values: - * @arg USART_FLAG_REACK: Receive Enable acknowledge flag. - * @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag. - * @arg USART_FLAG_WU: Wake up flag, not available for STM32F030 devices. - * @arg USART_FLAG_RWU: Receive Wake up flag, not available for STM32F030 devices. - * @arg USART_FLAG_SBK: Send Break flag. - * @arg USART_FLAG_CM: Character match flag. - * @arg USART_FLAG_BUSY: Busy flag. - * @arg USART_FLAG_ABRF: Auto baud rate flag. - * @arg USART_FLAG_ABRE: Auto baud rate error flag. - * @arg USART_FLAG_EOB: End of block flag, not available for STM32F030 devices. - * @arg USART_FLAG_RTO: Receive time out flag. - * @arg USART_FLAG_nCTSS: Inverted nCTS input bit status. - * @arg USART_FLAG_CTS: CTS Change flag. - * @arg USART_FLAG_LBD: LIN Break detection flag, not available for STM32F030 devices. - * @arg USART_FLAG_TXE: Transmit data register empty flag. - * @arg USART_FLAG_TC: Transmission Complete flag. - * @arg USART_FLAG_RXNE: Receive data register not empty flag. - * @arg USART_FLAG_IDLE: Idle Line detection flag. - * @arg USART_FLAG_ORE: OverRun Error flag. - * @arg USART_FLAG_NE: Noise Error flag. - * @arg USART_FLAG_FE: Framing Error flag. - * @arg USART_FLAG_PE: Parity Error flag. - * @retval The new state of USART_FLAG (SET or RESET). - */ -FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG) -{ - FlagStatus bitstatus = RESET; - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_FLAG(USART_FLAG)); - - if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET) - { - bitstatus = SET; - } - else - { - bitstatus = RESET; - } - return bitstatus; -} - -/** - * @brief Clears the USARTx's pending flags. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_FLAG: specifies the flag to clear. - * This parameter can be any combination of the following values: - * @arg USART_FLAG_WU: Wake up flag, not available for STM32F030 devices. - * @arg USART_FLAG_CM: Character match flag. - * @arg USART_FLAG_EOB: End of block flag, not available for STM32F030 devices. - * @arg USART_FLAG_RTO: Receive time out flag. - * @arg USART_FLAG_CTS: CTS Change flag. - * @arg USART_FLAG_LBD: LIN Break detection flag, not available for STM32F030 devices. - * @arg USART_FLAG_TC: Transmission Complete flag. - * @arg USART_FLAG_IDLE: IDLE line detected flag. - * @arg USART_FLAG_ORE: OverRun Error flag. - * @arg USART_FLAG_NE: Noise Error flag. - * @arg USART_FLAG_FE: Framing Error flag. - * @arg USART_FLAG_PE: Parity Errorflag. - * - * @note RXNE pending bit is cleared by a read to the USART_RDR register - * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register - * USART_RQR (USART_RequestCmd()). - * @note TC flag can be also cleared by software sequence: a read operation - * to USART_SR register (USART_GetFlagStatus()) followed by a write - * operation to USART_TDR register (USART_SendData()). - * @note TXE flag is cleared by a write to the USART_TDR register (USART_SendData()) - * or by writing 1 to the TXFRQ in the register USART_RQR (USART_RequestCmd()). - * @note SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR - * (USART_RequestCmd()). - * @retval None - */ -void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG) -{ - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_CLEAR_FLAG(USART_FLAG)); - - USARTx->ICR = USART_FLAG; -} - -/** - * @brief Checks whether the specified USART interrupt has occurred or not. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_IT: specifies the USART interrupt source to check. - * This parameter can be one of the following values: - * @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices. - * @arg USART_IT_CM: Character match interrupt. - * @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices. - * @arg USART_IT_RTO: Receive time out interrupt. - * @arg USART_IT_CTS: CTS change interrupt. - * @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices. - * @arg USART_IT_TXE: Tansmit Data Register empty interrupt. - * @arg USART_IT_TC: Transmission complete interrupt. - * @arg USART_IT_RXNE: Receive Data register not empty interrupt. - * @arg USART_IT_IDLE: Idle line detection interrupt. - * @arg USART_IT_ORE: OverRun Error interrupt. - * @arg USART_IT_NE: Noise Error interrupt. - * @arg USART_IT_FE: Framing Error interrupt. - * @arg USART_IT_PE: Parity Error interrupt. - * @retval The new state of USART_IT (SET or RESET). - */ -ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT) -{ - uint32_t bitpos = 0, itmask = 0, usartreg = 0; - ITStatus bitstatus = RESET; - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_GET_IT(USART_IT)); - - /* Get the USART register index */ - usartreg = (((uint16_t)USART_IT) >> 0x08); - /* Get the interrupt position */ - itmask = USART_IT & IT_MASK; - itmask = (uint32_t)0x01 << itmask; - - if (usartreg == 0x01) /* The IT is in CR1 register */ - { - itmask &= USARTx->CR1; - } - else if (usartreg == 0x02) /* The IT is in CR2 register */ - { - itmask &= USARTx->CR2; - } - else /* The IT is in CR3 register */ - { - itmask &= USARTx->CR3; - } - - bitpos = USART_IT >> 0x10; - bitpos = (uint32_t)0x01 << bitpos; - bitpos &= USARTx->ISR; - if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET)) - { - bitstatus = SET; - } - else - { - bitstatus = RESET; - } - - return bitstatus; -} - -/** - * @brief Clears the USARTx's interrupt pending bits. - * @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral. - * @note USART3 and USART4 are available only for STM32F072 devices. - * @note USART2 is not available for STM32F031 devices. - * @param USART_IT: specifies the interrupt pending bit to clear. - * This parameter can be one of the following values: - * @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices. - * @arg USART_IT_CM: Character match interrupt. - * @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices. - * @arg USART_IT_RTO: Receive time out interrupt. - * @arg USART_IT_CTS: CTS change interrupt. - * @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices. - * @arg USART_IT_TC: Transmission complete interrupt. - * @arg USART_IT_IDLE: IDLE line detected interrupt. - * @arg USART_IT_ORE: OverRun Error interrupt. - * @arg USART_IT_NE: Noise Error interrupt. - * @arg USART_IT_FE: Framing Error interrupt. - * @arg USART_IT_PE: Parity Error interrupt. - * - * @note RXNE pending bit is cleared by a read to the USART_RDR register - * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register - * USART_RQR (USART_RequestCmd()). - * @note TC pending bit can be also cleared by software sequence: a read - * operation to USART_SR register (USART_GetITStatus()) followed by - * a write operation to USART_TDR register (USART_SendData()). - * @note TXE pending bit is cleared by a write to the USART_TDR register - * (USART_SendData()) or by writing 1 to the TXFRQ in the register - * USART_RQR (USART_RequestCmd()). - * @retval None - */ -void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT) -{ - uint32_t bitpos = 0, itmask = 0; - /* Check the parameters */ - assert_param(IS_USART_ALL_PERIPH(USARTx)); - assert_param(IS_USART_CLEAR_IT(USART_IT)); - - bitpos = USART_IT >> 0x10; - itmask = ((uint32_t)0x01 << (uint32_t)bitpos); - USARTx->ICR = (uint32_t)itmask; -} - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |