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Merge pull request #8085 from jeromecoutant/PR_RTC_LSI 

STM32 RTC : start LSI clock (for targets without LSE)
pull/8286/head
Martin Kojtal 2018-10-04 13:37:53 +02:00 committed by GitHub
parent 8b623156e5 827c8bd486
commit 7a057d7ec8
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 20 additions and 25 deletions
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1
targets/TARGET_STM/TARGET_STM32F0/common_objects.h
View File

@ -148,7 +148,6 @@ struct flash_s {
#endif
/* STM32F0 HAL doesn't provide this API called in rtc_api.c */
#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
#define RTC_WKUP_IRQn RTC_IRQn
#endif

4
targets/TARGET_STM/TARGET_STM32F1/common_objects.h
View File

@ -137,8 +137,4 @@ struct flash_s {
}
#endif
/* STM32F1 HAL doesn't provide this API called in rtc_api.c */
#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
#endif

4
targets/TARGET_STM/TARGET_STM32F3/common_objects.h
View File

@ -145,8 +145,4 @@ struct flash_s {
}
#endif
/* STM32F3 HAL doesn't provide this API called in rtc_api.c */
#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
#endif

4
targets/TARGET_STM/TARGET_STM32L4/common_objects.h
View File

@ -143,8 +143,4 @@ struct can_s {
};
#endif
/* STM32L4 HAL doesn't provide this API called in rtc_api.c */
#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
#endif

16
targets/TARGET_STM/mbed_overrides.c
View File

@ -54,5 +54,21 @@ void mbed_sdk_init()
SetSysClock();
SystemCoreClockUpdate();
/* Start LSI clock for RTC */
#if DEVICE_RTC
#if !MBED_CONF_TARGET_LSE_AVAILABLE
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
if (__HAL_RCC_GET_RTC_SOURCE() != RCC_RTCCLKSOURCE_NO_CLK) {
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
error("Init : cannot initialize LSI\n");
}
}
#endif /* ! MBED_CONF_TARGET_LSE_AVAILABLE */
#endif /* DEVICE_RTC */
mbed_sdk_inited = 1;
}

16
targets/TARGET_STM/rtc_api.c
View File

@ -60,14 +60,12 @@ void rtc_init(void)
#if MBED_CONF_TARGET_LSE_AVAILABLE
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
error("Cannot initialize RTC with LSE\n");
}
__HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
@ -76,19 +74,13 @@ void rtc_init(void)
error("PeriphClkInitStruct RTC failed with LSE\n");
}
#else /* MBED_CONF_TARGET_LSE_AVAILABLE */
// Reset Backup domain
__HAL_RCC_BACKUPRESET_FORCE();
__HAL_RCC_BACKUPRESET_RELEASE();
// Enable LSI clock
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
error("Cannot initialize RTC with LSI\n");
}
__HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
@ -116,14 +108,14 @@ void rtc_init(void)
#endif /* TARGET_STM32F1 */
if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
error("RTC initialization failed");
error("RTC initialization failed\n");
}
#if !(TARGET_STM32F1) && !(TARGET_STM32F2)
/* STM32F1 : there are no shadow registers */
/* STM32F2 : shadow registers can not be bypassed */
if (HAL_RTCEx_EnableBypassShadow(&RtcHandle) != HAL_OK) {
error("EnableBypassShadow error");
error("EnableBypassShadow error\n");
}
#endif /* TARGET_STM32F1 || TARGET_STM32F2 */
}