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[NUCLEO_F103RB] Use HSI/LSI instead of HSE/LSE 

Due to Nucleo board revision C requirements.
pull/131/head
bcostm 2013-12-17 11:04:28 +01:00
parent adce27f269
commit c84b8f9193
2 changed files with 15 additions and 8 deletions
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4
libraries/mbed/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F103RB/system_stm32f10x.c
View File

@ -105,14 +105,14 @@
#if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
/* #define SYSCLK_FREQ_HSE HSE_VALUE */
#define SYSCLK_FREQ_24MHz 24000000
/* #define SYSCLK_FREQ_24MHz 24000000 */
#else
/* #define SYSCLK_FREQ_HSE HSE_VALUE */
/* #define SYSCLK_FREQ_24MHz 24000000 */
/* #define SYSCLK_FREQ_36MHz 36000000 */
/* #define SYSCLK_FREQ_48MHz 48000000 */
/* #define SYSCLK_FREQ_56MHz 56000000 */
#define SYSCLK_FREQ_72MHz 72000000
/* #define SYSCLK_FREQ_72MHz 72000000 */
#endif
/*!< Uncomment the following line if you need to use external SRAM mounted

19
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/rtc_api.c
View File

@ -24,12 +24,18 @@ void rtc_init(void) {
BKP_DeInit(); // Reset Backup Domain
// Uncomment these lines if you use the LSE
// Enable LSE and wait till it's ready
RCC_LSEConfig(RCC_LSE_ON);
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
//RCC_LSEConfig(RCC_LSE_ON);
//while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
//RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
// Uncomment these lines if you use the LSI
// Enable LSI and wait till it's ready
RCC_LSICmd(ENABLE);
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {}
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select LSI as RTC Clock Source
RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock
RTC_WaitForSynchro(); // Wait for RTC registers synchronization
@ -37,8 +43,9 @@ void rtc_init(void) {
RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
// Set RTC period to 1 sec
// RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1)
RTC_SetPrescaler(32767);
// For LSE: prescaler = RTCCLK/RTC period = 32768Hz/1Hz = 32768
// For LSI: prescaler = RTCCLK/RTC period = 40000Hz/1Hz = 40000
RTC_SetPrescaler(39999);
RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished