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Update drv_hwtimer.c 

STM32的硬件定时器在 APBxCLKDivider 为 RCC_HCLK_DIV1 的时候，timer clocks 频率等于外设总线时钟PCLKx. 反之 timer clocks 为 PCLKx 的2倍.
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林永 2020-08-25 13:44:32 +08:00 committed by GitHub
parent 07ad08e0f4
commit f8e21052ef
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 11 deletions
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29
bsp/stm32/libraries/HAL_Drivers/drv_hwtimer.c
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@ -7,6 +7,7 @@
* Date Author Notes
* 2018-12-10 zylx first version
* 2020-06-16 thread-liu Porting for stm32mp1
* 2020-08-25 linyongkang Fix the timer clock frequency doubling problem
*/
#include <board.h>
@ -164,6 +165,12 @@ static void timer_init(struct rt_hwtimer_device *timer, rt_uint32_t state)
tim = (TIM_HandleTypeDef *)timer->parent.user_data;
tim_device = (struct stm32_hwtimer *)timer;
uint32_t FLatency = 0;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &FLatency);
uint32_t pclk1_doubler = 1 + ( RCC_ClkInitStruct.APB1CLKDivider != RCC_HCLK_DIV1 );
uint32_t pclk2_doubler = 1 + ( RCC_ClkInitStruct.APB2CLKDivider != RCC_HCLK_DIV1 );
/* time init */
#if defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7)
if (tim->Instance == TIM9 || tim->Instance == TIM10 || tim->Instance == TIM11)
@ -176,12 +183,12 @@ static void timer_init(struct rt_hwtimer_device *timer, rt_uint32_t state)
#endif
{
#if !defined(SOC_SERIES_STM32F0) && !defined(SOC_SERIES_STM32G0)
prescaler_value = (uint32_t)(HAL_RCC_GetPCLK2Freq() * 2 / 10000) - 1;
prescaler_value = (uint32_t)(HAL_RCC_GetPCLK2Freq() * pclk2_doubler / 10000) - 1;
#endif
}
else
{
prescaler_value = (uint32_t)(HAL_RCC_GetPCLK1Freq() * 2 / 10000) - 1;
prescaler_value = (uint32_t)(HAL_RCC_GetPCLK1Freq() * pclk1_doubler / 10000) - 1;
}
tim->Init.Period = 10000 - 1;
tim->Init.Prescaler = prescaler_value;
@ -290,6 +297,12 @@ static rt_err_t timer_ctrl(rt_hwtimer_t *timer, rt_uint32_t cmd, void *arg)
/* set timer frequence */
freq = *((rt_uint32_t *)arg);
uint32_t FLatency = 0;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &FLatency);
uint32_t pclk1_doubler = 1 + ( RCC_ClkInitStruct.APB1CLKDivider != RCC_HCLK_DIV1 );
uint32_t pclk2_doubler = 1 + ( RCC_ClkInitStruct.APB2CLKDivider != RCC_HCLK_DIV1 );
#if defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7)
if (tim->Instance == TIM9 || tim->Instance == TIM10 || tim->Instance == TIM11)
#elif defined(SOC_SERIES_STM32L4)
@ -300,19 +313,13 @@ static rt_err_t timer_ctrl(rt_hwtimer_t *timer, rt_uint32_t cmd, void *arg)
if (0)
#endif
{
#if defined(SOC_SERIES_STM32L4)
val = HAL_RCC_GetPCLK2Freq() / freq;
#elif defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7) || defined(SOC_SERIES_STM32MP1)
val = HAL_RCC_GetPCLK2Freq() * 2 / freq;
#if !defined(SOC_SERIES_STM32F0) && !defined(SOC_SERIES_STM32G0)
val = (uint32_t)(HAL_RCC_GetPCLK2Freq() * pclk2_doubler / 10000) - 1;
#endif
}
else
{
#if defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7) || defined(SOC_SERIES_STM32MP1)
val = HAL_RCC_GetPCLK1Freq() * 2 / freq;
#elif defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32G0)
val = HAL_RCC_GetPCLK1Freq() / freq;
#endif
val = HAL_RCC_GetPCLK1Freq() * pclk1_doubler / freq;
}
__HAL_TIM_SET_PRESCALER(tim, val - 1);