diff options
Diffstat (limited to 'Project')
| -rw-r--r-- | Project/inc/main.h | 41 | ||||
| -rw-r--r-- | Project/inc/stm32f0xx_conf.h | 84 | ||||
| -rw-r--r-- | Project/inc/stm32f0xx_it.h | 53 | ||||
| -rw-r--r-- | Project/src/main.c | 178 | ||||
| -rw-r--r-- | Project/src/stm32f0xx_it.c | 254 | ||||
| -rw-r--r-- | Project/src/system_stm32f0xx.c | 402 |
6 files changed, 1012 insertions, 0 deletions
diff --git a/Project/inc/main.h b/Project/inc/main.h new file mode 100644 index 0000000..ce89a06 --- /dev/null +++ b/Project/inc/main.h @@ -0,0 +1,41 @@ +/** + ****************************************************************************** + * @file STM32L152_Ex01_3TKeys_EVAL\inc\main.h + * @author MCD Application Team + * @version V1.1.0 + * @date 24-February-2014 + * @brief Header for main.c module + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __MAIN_H +#define __MAIN_H + + +/* Exported types ------------------------------------------------------------*/ +/* Exported variables --------------------------------------------------------*/ +/* Exported macros -----------------------------------------------------------*/ +/* Exported functions ------------------------------------------------------- */ + + +#endif /* __MAIN_H */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/Project/inc/stm32f0xx_conf.h b/Project/inc/stm32f0xx_conf.h new file mode 100644 index 0000000..adbf30b --- /dev/null +++ b/Project/inc/stm32f0xx_conf.h @@ -0,0 +1,84 @@ +/** + ****************************************************************************** + * @file Projects\Demonstration\stm32f0xx_conf.h + * @author MCD Application Team + * @version V1.0.0 + * @date 17-January-2014 + * @brief Library configuration file. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __STM32F0XX_CONF_H +#define __STM32F0XX_CONF_H + + +/* Includes ------------------------------------------------------------------*/ +/* Comment the line below to disable peripheral header file inclusion */ +#include "stm32f0xx_adc.h" +//#include "stm32f0xx_can.h" +//#include "stm32f0xx_cec.h" +//#include "stm32f0xx_crc.h" +//#include "stm32f0xx_crs.h" +//#include "stm32f0xx_comp.h" +//#include "stm32f0xx_dac.h" +//#include "stm32f0xx_dbgmcu.h" +#include "stm32f0xx_dma.h" +//#include "stm32f0xx_exti.h" +//#include "stm32f0xx_flash.h" +#include "stm32f0xx_gpio.h" +#include "stm32f0xx_syscfg.h" +//#include "stm32f0xx_i2c.h" +//#include "stm32f0xx_iwdg.h" +#include "stm32f0xx_pwr.h" +#include "stm32f0xx_rcc.h" +#include "stm32f0xx_rtc.h" +#include "stm32f0xx_spi.h" +#include "stm32f0xx_tim.h" +//#include "stm32f0xx_usart.h" +//#include "stm32f0xx_wwdg.h" +#include "stm32f0xx_misc.h" /* High level functions for NVIC and SysTick (add-on to CMSIS functions) */ + +/* Exported types ------------------------------------------------------------*/ +/* Exported constants --------------------------------------------------------*/ +/* Uncomment the line below to expanse the "assert_param" macro in the + Standard Peripheral Library drivers code */ +/*#define USE_FULL_ASSERT 1*/ + +/* Exported macro ------------------------------------------------------------*/ +#ifdef USE_FULL_ASSERT + +/** + * @brief The assert_param macro is used for function's parameters check. + * @param expr: If expr is false, it calls assert_failed function which reports + * the name of the source file and the source line number of the call + * that failed. If expr is true, it returns no value. + * @retval None + */ + #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__)) +/* Exported functions ------------------------------------------------------- */ + void assert_failed(uint8_t* file, uint32_t line); +#else + #define assert_param(expr) ((void)0) +#endif /* USE_FULL_ASSERT */ + +#endif /* __STM32F0XX_CONF_H */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/Project/inc/stm32f0xx_it.h b/Project/inc/stm32f0xx_it.h new file mode 100644 index 0000000..4abda02 --- /dev/null +++ b/Project/inc/stm32f0xx_it.h @@ -0,0 +1,53 @@ +/** + ****************************************************************************** + * @file Projects\Demonstration\stm32f0xx_it.h + * @author MCD Application Team + * @version V1.0.0 + * @date 17-January-2014 + * @brief This file contains the headers of the interrupt handlers. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __STM32F0XX_IT_H +#define __STM32F0XX_IT_H + +#ifdef __cplusplus + extern "C" { +#endif + +/* Includes ------------------------------------------------------------------*/ +#include "main.h" + +/* Exported types ------------------------------------------------------------*/ +/* Exported constants --------------------------------------------------------*/ +/* Exported macro ------------------------------------------------------------*/ +/* Exported functions ------------------------------------------------------- */ + +void NMI_Handler(void); +void HardFault_Handler(void); + +#ifdef __cplusplus +} +#endif + +#endif /* __STM32F0XX_IT_H */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/Project/src/main.c b/Project/src/main.c new file mode 100644 index 0000000..bf1c5b0 --- /dev/null +++ b/Project/src/main.c @@ -0,0 +1,178 @@ +/** + ****************************************************************************** + * @file STM32L152_Ex01_3TKeys_EVAL\src\main.c + * @author MCD Application Team + * @version V1.1.0 + * @date 24-February-2014 + * @brief Basic example of how to use the STMTouch Driver. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* + Здесь необходимо создать большой комментарий о характеристиках железа МК. Или +же лучше создать отдельный файл и сделать на него ссылку. Кстати, такой файл +создает программа STM32CubeMX. + +И вообще, нужно создать глобальную папку проекта, где будет лежать все по +полочкам ( схема, программа, текстовые файлы, документация и тд ) +*/ + +//#define LED_DRIVER + +// Это программа для версии NixieClock_v2, которая является модифицированной версией предыдущей +// NixieLUT + +/* Includes ------------------------------------------------------------------*/ +#include "main.h" + +// FreeRTOS includes +#include "FreeRTOS.h" +#include "task.h" +#include "queue.h" +#include "semphr.h" + +#include "ltimers.h" +#include "head_task.h" +#include "button_task.h" +#include "button_handler.h" +#include "nixie_driver_task.h" +#include "light_sensor_task.h" + +#ifdef LED_DRIVER +#include "led_driver_task.h" +#endif + +#include "indicate_modes_task.h" +#include "tsl_user.h" +#include "time.h" + + +/* Private typedefs ----------------------------------------------------------*/ +/* Private defines -----------------------------------------------------------*/ +/* Private macros ------------------------------------------------------------*/ + +// Задаем размеры кучи для каждой задачи отдельно +// - как правильно определить необходимый минимум для кучи задачи? + +#define STACK_SIZE_HEAD ( (unsigned short) 230 ) +#define STACK_SIZE_NIXIE_DRIVER ( (unsigned short) 80 ) +#define STACK_SIZE_BUTTON ( (unsigned short) 200 ) +#define STACK_SIZE_LIGHT_SENSOR ( (unsigned short) 70 ) +#ifdef LED_DRIVER +#define STACK_SIZE_LED_DRIVER ( (unsigned short) 70 ) +#endif +#define STACK_SIZE_INDICATE_MODES ( (unsigned short) 250 ) + +/* Private functions prototype ---------------------------------------------- */ + + +// ---------------------------------------------------------------------------- +// Инициализация до создания задач +// ---------------------------------------------------------------------------- +void InitAll ( void ) +{ + InitLTimers (); + NixieDriverInit (); + LightSensorInit(); +#ifdef LED_DRIVER + LED_DriverInit (); +#endif + TSL_user_Init (); + TimeInit (); + HeadTaskInit (); + IndicateModesInit (); + ButtonInit (); +} + + +BaseType_t TaskSuccess = NULL; + +// Главный цикл ------------------------------------------------------------- // +int main () +{ + InitAll (); + + // Создаем задачи FreeRTOS ----------------------------------------------- // + + // ВНИМАНИЕ !!! + // Необходимо проверять кучу при создании задачи! ( и очереди ) + + // Если в программе используется подключаемая библиотека, которая использует + // ОСРВ, то задача должна там и создаватья. То есть это нужно оформить в + // в виде специальной функции + + //BaseType_t TaskSuccess = NULL; + + TaskSuccess = xTaskCreate ( Head_Task, "Head_Task", STACK_SIZE_HEAD, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); + + TaskSuccess = xTaskCreate ( IndicateModes_Task, "IndicateModes_Task", STACK_SIZE_INDICATE_MODES, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); + + TaskSuccess = xTaskCreate ( Button_Task, "Button_Task", STACK_SIZE_BUTTON, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); + + TaskSuccess = xTaskCreate ( LightSensor_Task, "LightSensor_Task", STACK_SIZE_LIGHT_SENSOR, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); + + TaskSuccess = xTaskCreate ( NixieDriver_Task, "NixieDriver_Task", STACK_SIZE_NIXIE_DRIVER, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); + +#ifdef LED_DRIVER + TaskSuccess = xTaskCreate ( LED_Driver_Task, "LED_Driver_Task", STACK_SIZE_LED_DRIVER, NULL, tskIDLE_PRIORITY + 2, NULL ); + configASSERT( TaskSuccess ); +#endif + + vTaskStartScheduler (); // И запускаем диспетчер задач ( он же планировщик ) + +} // end of main + + + +#ifdef USE_FULL_ASSERT +/** + * @brief Reports the name of the source file and the source line number + * where the assert_param error has occurred. + * @param file: pointer to the source file name + * @param line: assert_param error line source number + * @retval None + */ +void assert_failed ( uint8_t* file, uint32_t line ) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + for (;;) + { + } +} +#endif + + +// Специальные ф-ии FreeRTOS ------------------------------------------------ // +void vApplicationMallocFailedHook ( void ) { for( ;; ); } +void vApplicationStackOverflowHook ( TaskHandle_t pxTask, char *pcTaskName ) { for( ;; ); } +void vApplicationIdleHook ( void ) { } + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ + + + diff --git a/Project/src/stm32f0xx_it.c b/Project/src/stm32f0xx_it.c new file mode 100644 index 0000000..20e6b67 --- /dev/null +++ b/Project/src/stm32f0xx_it.c @@ -0,0 +1,254 @@ +/** + ****************************************************************************** + * @file Projects\Demonstration\stm32f0xx_it.c + * @author MCD Application Team + * @version V1.0.0 + * @date 17-January-2014 + * @brief Main Interrupt Service Routines. + * This file provides template for all exceptions handler and + * peripherals interrupt service routine. + ****************************************************************************** + * @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_it.h" +#include "stm32f0xx_conf.h" + +#include "ltimers.h" +#include "ltimers_config.h" + +#include "nixie_driver_config.h" +#include "nixie_driver_process.h" +#include "led_driver_process.h" +#include "led_driver_config.h" + +#include "tsl_types.h" +#include "tsl_user.h" +#include "tsl_time_stm32f0xx.h" + + +/** @addtogroup STM32F072B_DISCOVERY + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ + +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/******************************************************************************/ +/* Cortex-M0 Processor Exceptions Handlers */ +/******************************************************************************/ + +/** + * @brief This function handles NMI exception. + * @param None + * @retval None + */ +void NMI_Handler(void) +{ +} + +/** + * @brief This function handles Hard Fault exception. + * @param None + * @retval None + */ +void HardFault_Handler(void) +{ + /* Go to infinite loop when Hard Fault exception occurs */ + while (1) + { + } +} + +/** + * @brief This function handles SVCall exception. + * @param None + * @retval None + * @ Используется в файле portasm.s + */ +//void SVC_Handler(void) +//{ +//} + +/** + * @brief This function handles PendSVC exception. + * @param None + * @retval None + * @ Используется в файле portasm.s + */ +//void PendSV_Handler(void) +//{ +//} + +/** + * @brief This function handles SysTick Handler. + * @param None + * @retval None + */ +//void SysTick_Handler(void) +//{ +// TimingDelay_Decrement(); +// TSL_tim_ProcessIT(); +//} + +/******************************************************************************/ +/* STM32F0xx Peripherals Interrupt Handlers */ +/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */ +/* available peripheral interrupt handler's name please refer to the startup */ +/* file (startup_stm32f0xx.s). */ +/******************************************************************************/ + +// ---------------------------------------------------------------------------- +// Обработчик прерывания таймера общего назначения для тиков в 1 мс +// ---------------------------------------------------------------------------- +void LTIMER_IRQHandler ( void ) +{ + if ( TIM_GetITStatus ( LTIMER_TIMx, TIM_IT_Update ) != RESET ) + { + TIM_ClearITPendingBit ( LTIMER_TIMx, TIM_IT_Update ); + + ProcessLTimers (); + //NIX_TEST_PIN_PB11_TOGGLE; + } +} + + +// ---------------------------------------------------------------------------- +// Обработчик прерывания таймера для работы NixieDriver +// Это прерывание имеет самый высокий приоритет, чтобы обеспечить стабильную +// частоту динамической индикации ламп Nixie +// ---------------------------------------------------------------------------- +void NIX_DRIVER_TIM_IRQHandler ( void ) +{ + if ( TIM_GetITStatus ( NIX_DRIVER_TIMx, TIM_IT_Update ) != RESET ) + { + TIM_ClearITPendingBit ( NIX_DRIVER_TIMx, TIM_IT_Update ); + + ProcessNixieDriverFromISR (); + } +} + +// ---------------------------------------------------------------------------- +// Обработчик прерывания таймера для работы LED_Driver +// ---------------------------------------------------------------------------- +void LED_TIM_IRQHandler ( void ) +{ + if ( TIM_GetITStatus ( LED_TIMx, TIM_IT_Update ) != RESET ) + { + TIM_ClearITPendingBit ( LED_TIMx, TIM_IT_Update ); + + LEDDriverProcessFromISR (); + } +} + + +// ---------------------------------------------------------------------------- +// - поставить этому прерыванию наивысший приоритет, чтобы передавать 2 байта +// подряд гарантированно без промежутка времени (или не так важно? может ли +// между двумя байтами задержка повлиять на вывод данных на лампы?) +// ---------------------------------------------------------------------------- +//static uint16_t empty_data; + +void NIX_SPIx_IRQHandler ( void ) +{ + /* SPI in Master Receiver mode--------------------------------------- */ + if ( SPI_I2S_GetITStatus ( NIX_SPIx, SPI_I2S_IT_TXE ) == SET ) + { + // Обязательно надо считать, чтобы сбросить флаг + SPI_I2S_ReceiveData16 ( NIX_SPIx ); + SPI_I2S_ITConfig ( NIX_SPIx, SPI_I2S_IT_TXE, DISABLE ); + //NixieDriverCheckDPPins(); + NIX_DRIVER_SET_ST_PIN; + } +} + + +// ---------------------------------------------------------------------------- +// +// ---------------------------------------------------------------------------- +#ifdef LED_DRIVER +void LED_SPIx_IRQHandler ( void ) +{ + /* SPI in Master Receiver mode--------------------------------------- */ + if ( SPI_I2S_GetITStatus ( LED_SPIx, SPI_I2S_IT_RXNE ) == SET ) + { + //empty_data = SPI_I2S_ReceiveData16 ( LED_SPIx ); + // Обязательно надо считать, чтобы сбросить флаг + SPI_I2S_ReceiveData16 ( LED_SPIx ); + LED_ST_PIN_SET; + } +} +#endif + + +// ---------------------------------------------------------------------------- +/** + * @brief This function handles Touch Sensing Controller Handler. + * @param None + * @retval None + */ +// ---------------------------------------------------------------------------- +extern __IO uint32_t Gv_EOA; + +void TSC_IRQHandler ( void ) +{ +#if TSLPRM_TSC_IODEF > 0 // Default = Input Floating + /* Set IO default in Output PP Low to discharge all capacitors */ + TSC->CR &= (uint32_t)(~(1 << 4)); +#endif + TSC->ICR |= 0x03; /* Clear EOAF and MCEF flags */ + Gv_EOA = 1; /* To inform the main loop routine of the End Of Acquisition */ +} + + +// ---------------------------------------------------------------------------- +// +// ---------------------------------------------------------------------------- +void TS_TIM_IRQHandler ( void ) +{ + TIM_ClearITPendingBit ( TS_TIMx, TIM_IT_Update ); + TSL_tim_ProcessIT(); +} + + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ + + + + + + + + + + + + + + + + + + diff --git a/Project/src/system_stm32f0xx.c b/Project/src/system_stm32f0xx.c new file mode 100644 index 0000000..e9db4f2 --- /dev/null +++ b/Project/src/system_stm32f0xx.c @@ -0,0 +1,402 @@ +/** + ****************************************************************************** + * @file system_stm32f0xx.c + * @author MCD Application Team + * @version V1.0.0 + * @date 17-January-2014 + * @brief CMSIS Cortex-M0 Device Peripheral Access Layer System Source File. + * This file contains the system clock configuration for STM32F0xx devices, + * and is customized for use with STM32F072B-DISCOVERY Kit. + * + * + * The STM32F072x is configured to run at 48 MHz, following the five + * configuration below: + * - SOURCE_HSI48 (default) : HSI48 (48MHz) used as system clock source. + * - PLL_SOURCE_HSI : HSI (~8MHz) used to clock the PLL, and + * the PLL is used as system clock source. + * - PLL_SOURCE_HSI48 : HSI48 (48MHz) used to clock the PLL, and + * the PLL is used as system clock source. + * - PLL_SOURCE_HSE : HSE (8MHz) used to clock the PLL, and + * the PLL is used as system clock source. + * - PLL_SOURCE_HSE_BYPASS : HSE bypassed with an external clock + * (8MHz, coming from ST-Link) used to clock + * the PLL, and the PLL is used as system + * clock source. + * + * + * 1. This file provides two functions and one global variable to be called from + * user application: + * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier + * and Divider factors, AHB/APBx prescalers and Flash settings), + * depending on the configuration made in the clock xls tool. + * This function is called at startup just after reset and + * before branch to main program. This call is made inside + * the "startup_stm32f0xx.s" file. + * + * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used + * by the user application to setup the SysTick + * timer or configure other parameters. + * + * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must + * be called whenever the core clock is changed + * during program execution. + * + * 2. After each device reset the HSI (8 MHz Range) is used as system clock source. + * Then SystemInit() function is called, in "startup_stm32f0xx.s" file, to + * configure the system clock before to branch to main program. + * + * 3. If the system clock source selected by user fails to startup, the SystemInit() + * function will do nothing and HSI still used as system clock source. User can + * add some code to deal with this issue inside the SetSysClock() function. + * + * 4. The default value of HSE crystal is set to 8MHz, refer to "HSE_VALUE" define + * in "stm32f0xx.h" file. When HSE is used as system clock source, directly or + * through PLL, and you are using different crystal you have to adapt the HSE + * value to your own configuration. + * + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/** @addtogroup CMSIS + * @{ + */ + +/** @addtogroup stm32f0xx_system + * @{ + */ + +/** @addtogroup STM32F0xx_System_Private_Includes + * @{ + */ + +#include "stm32f0xx.h" + +/** + * @} + */ + +/** @addtogroup STM32F0xx_System_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F0xx_System_Private_Defines + * @{ + */ +/** + * @} + */ + +/*!< Uncomment the following line if you need to relocate your vector Table in + Internal SRAM. */ +/* #define VECT_TAB_SRAM */ +#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field. + This value must be a multiple of 0x200. */ + +/* Select the PLL clock source */ + +//#define SOURCE_HSI48 +//#define PLL_SOURCE_HSI48 /* HSI48 (48MHz) used to clock USB, system clock and the PLL*/ +//#define PLL_SOURCE_HSI /* HSI (~8MHz) used to clock the PLL, and the PLL is used as system clock source*/ +#define PLL_SOURCE_HSE /* HSE (8MHz) used to clock the PLL, and the PLL is used as system clock source */ +//#define PLL_SOURCE_HSE_BYPASS /* HSE bypassed with an external clock (8MHz, coming from ST-Link) used to clock +// the PLL, and the PLL is used as system clock source */ + + +/** @addtogroup STM32F0xx_System_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F0xx_System_Private_Variables + * @{ + */ +uint32_t SystemCoreClock = 48000000; +__I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; + +/** + * @} + */ + +/** @addtogroup STM32F0xx_System_Private_FunctionPrototypes + * @{ + */ + +static void SetSysClock(void); + +/** + * @} + */ + +/** @addtogroup STM32F0xx_System_Private_Functions + * @{ + */ + +/** + * @brief Setup the microcontroller system. + * Initialize the Embedded Flash Interface, the PLL and update the + * SystemCoreClock variable. + * @param None + * @retval None + */ +void SystemInit (void) +{ + /* Set HSION bit */ + RCC->CR |= (uint32_t)0x00000001; + + /* Reset SW[1:0], HPRE[3:0], PPRE[2:0], ADCPRE and MCOSEL[3:0] bits MCOPRE[2:0] */ + RCC->CFGR &= (uint32_t)0x80FFB80C; + + /* Reset HSEON, CSSON and PLLON bits */ + RCC->CR &= (uint32_t)0xFEF6FFFF; + + /* Reset HSEBYP bit */ + RCC->CR &= (uint32_t)0xFFFBFFFF; + + /* Reset PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */ + RCC->CFGR &= (uint32_t)0xFFC07FFF; + + /* Reset PREDIV1[3:0] bits */ + RCC->CFGR2 &= (uint32_t)0xFFFFFFF0; + + /* Reset USARTSW[1:0], I2CSW, CECSW and ADCSW bits */ + RCC->CFGR3 &= (uint32_t)0xFFFFFEAC; + + /* Reset HSI14 & HSI48 bit */ + RCC->CR2 &= (uint32_t)0xFFFEFFFE; + + /* Disable all interrupts */ + RCC->CIR = 0x00000000; + + /* Configure the System clock frequency, AHB/APBx prescalers and Flash settings */ + SetSysClock(); +} + +/** + * @brief Update SystemCoreClock according to Clock Register Values + * The SystemCoreClock variable contains the core clock (HCLK), it can + * be used by the user application to setup the SysTick timer or configure + * other parameters. + * + * @note Each time the core clock (HCLK) changes, this function must be called + * to update SystemCoreClock variable value. Otherwise, any configuration + * based on this variable will be incorrect. + * + * @note - The system frequency computed by this function is not the real + * frequency in the chip. It is calculated based on the predefined + * constant and the selected clock source: + * + * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*) + * + * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**) + * + * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**) + * or HSI_VALUE(*) multiplied/divided by the PLL factors. + * @note - If SYSCLK source is HSI48, function returns constant HSI48_VALUE(***) + * + * (*) HSI_VALUE is a constant defined in stm32f0xx.h file (default value + * 8 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * + * (**) HSE_VALUE is a constant defined in stm32f0xx.h file (default value + * 8 MHz), user has to ensure that HSE_VALUE is same as the real + * frequency of the crystal used. Otherwise, this function may + * have wrong result. + * @note (***) HSI48_VALUE is a constant defined in stm32f0xx.h file (default value + * 48 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * + * - The result of this function could be not correct when using fractional + * value for HSE crystal. + * @param None + * @retval None + */ +void SystemCoreClockUpdate (void) +{ + uint32_t tmp = 0, pllmull = 0, pllsource = 0, prediv1factor = 0; + + /* Get SYSCLK source -------------------------------------------------------*/ + tmp = RCC->CFGR & RCC_CFGR_SWS; + + switch (tmp) + { + case 0x00: /* HSI used as system clock */ + SystemCoreClock = HSI_VALUE; + break; + case 0x04: /* HSE used as system clock */ + SystemCoreClock = HSE_VALUE; + break; + case 0x08: /* PLL used as system clock */ + /* Get PLL clock source and multiplication factor ----------------------*/ + pllmull = RCC->CFGR & RCC_CFGR_PLLMULL; + pllsource = RCC->CFGR & RCC_CFGR_PLLSRC; + pllmull = ( pllmull >> 18) + 2; + + if (pllsource == 0x00) + { + /* HSI oscillator clock divided by 2 selected as PLL clock entry */ + SystemCoreClock = (HSI_VALUE >> 1) * pllmull; + } + else + { + prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1; + /* HSE oscillator clock selected as PREDIV1 clock entry */ + SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; + } + break; + case 0x0C: /* HSI48 used as system clock */ + SystemCoreClock = HSI48_VALUE; + break; + default: /* HSI used as system clock */ + SystemCoreClock = HSI_VALUE; + break; + + } + /* Compute HCLK clock frequency ----------------*/ + /* Get HCLK prescaler */ + tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; + /* HCLK clock frequency */ + SystemCoreClock >>= tmp; +} + +/** + * @brief Configures the System clock frequency, AHB/APBx prescalers and Flash + * settings. + * @note This function should be called only once the RCC clock configuration + * is reset to the default reset state (done in SystemInit() function). + * @param None + * @retval None + */ +static void SetSysClock(void) +{ + __IO uint32_t StartUpCounter = 0, HSEStatus = 0; + + /* SYSCLK, HCLK, PCLK configuration ----------------------------------------*/ + /* At this stage the HSI is already enabled */ + + /* Enable Prefetch Buffer and set Flash Latency */ + FLASH->ACR = FLASH_ACR_PRFTBE | FLASH_ACR_LATENCY; + + /* HCLK = SYSCLK */ + RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; + + /* PCLK = HCLK */ + RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE_DIV1; + +#ifndef SOURCE_HSI48 + + #if defined (PLL_SOURCE_HSI) + /* PLL configuration = HSI * 6 = 48 MHz */ + RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); + RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSI_PREDIV | RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLMULL6); + #elif defined (PLL_SOURCE_HSI48) + /* Enable HSI48 */ + RCC->CR2 |= RCC_CR2_HSI48ON; + /* PLL configuration = HSI48 * 1 = 48 MHz */ + RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); + RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSI48_PREDIV | RCC_CFGR_PLLXTPRE_PREDIV1_Div2); + + #else + /* Enable HSE */ + RCC->CR |= ((uint32_t)RCC_CR_HSEON); + #if defined (PLL_SOURCE_HSE_BYPASS) + /* HSE oscillator bypassed with external clock */ + RCC->CR |= (uint32_t)(RCC_CR_HSEBYP); + #endif + /* Wait till HSE is ready and if Time out is reached exit */ + do + { + HSEStatus = RCC->CR & RCC_CR_HSERDY; + StartUpCounter++; + } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); + + if ((RCC->CR & RCC_CR_HSERDY) != RESET) + { + HSEStatus = (uint32_t)0x01; + } + else + { + HSEStatus = (uint32_t)0x00; + } + + if (HSEStatus == (uint32_t)0x01) + { + /* PLL configuration = HSE * 6 = 48 MHz */ + RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); + RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_PREDIV1 | RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLMULL6); + + } + else + { /* If HSE fails to start-up, the application will have wrong clock + configuration. User can add here some code to deal with this error */ + } + + + + #endif /* PLL_SOURCE_HSI */ + /* Enable PLL */ + RCC->CR |= RCC_CR_PLLON; + + /* Wait till PLL is ready */ + while((RCC->CR & RCC_CR_PLLRDY) == 0) + { + } + + /* Select PLL as system clock source */ + RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); + RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; + + /* Wait till PLL is used as system clock source */ + while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_PLL) + { + } +#else + /* Enable HSI48 */ + RCC->CR2 |= RCC_CR2_HSI48ON; + /* Wait till HSI48RDY is set */ + while((RCC->CR2 & RCC_CR2_HSI48RDY) == 0) + { } + /* Select HSI48 as system clock source */ + RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); + RCC->CFGR |= (uint32_t)RCC_CFGR_SW_HSI48; + +#endif + +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |