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/**
******************************************************************************
* @file tsl_time_stm32f0xx.c
* @author MCD Application Team
* @version V1.4.4
* @date 31-March-2014
* @brief This file contains all functions to manage the timing with STM32F0xx products.
******************************************************************************
* @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 "tsl_time_stm32f0xx.h"
/* Private typedefs ----------------------------------------------------------*/
/* Private defines -----------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private functions prototype -----------------------------------------------*/
/**
* @brief Initialization of the timing module.
* @param None
* @retval Status Return TSL_STATUS_ERROR if the Systick configuration has failed.
*/
TSL_Status_enum_T TSL_tim_Init(void)
{
// Program one systick interrupt every (1 / TSLPRM_TICK_FREQ) ms
// if (SysTick_Config(SystemCoreClock / TSLPRM_TICK_FREQ))
// {
// return TSL_STATUS_ERROR;
// }
// else
// {
// return TSL_STATUS_OK;
// }
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* TouchSense_TIMx clock enable */
TS_RCC_APBxPeriphClockCmd ( TS_TIM_RCC, ENABLE );
/* Enable the TouchSense_TIMx gloabal Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TS_TIM_IRQx;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init ( &NVIC_InitStructure );
/* -----------------------------------------------------------------------
In this example TIM7 counter clock (TIM7CLK) is set to APB1 clock (PCLK1), since
APB1 prescaler is set to 1 and TIM7 prescaler is set to 0.
In this example TIM7 input clock (TIM7CLK) is set to APB1 clock (PCLK1),
since APB1 prescaler is set to 1.
TIM7CLK = PCLK1 = HCLK = SystemCoreClock
With Prescaler set to 479 and Period to 24999, the TIM7 counter is updated each 250 ms
(i.e. and interrupt is generated each 250 ms)
TIM7 counter clock = TIM7CLK /((Prescaler + 1)*(Period + 1))
= 48 MHz / ((25000)*(480))
= 4 Hz
==> TIM7 counter period = 250 ms
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f0xx.c file.
Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate()
function to update SystemCoreClock variable value. Otherwise, any configuration
based on this variable will be incorrect.
----------------------------------------------------------------------- */
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 1000; // Ýòî ìèêñðîñåêóíäû //24999
TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/1000000)-1; //479;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit ( TS_TIMx, &TIM_TimeBaseStructure );
/* TouchSense_TIMx Interrupts enable */
TIM_ITConfig ( TS_TIMx, TIM_IT_Update, ENABLE );
/* TouchSense_TIMx enable counter */
TIM_Cmd ( TS_TIMx, ENABLE );
return TSL_STATUS_OK;
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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