diff options
| author | Damien George <damien.p.george@gmail.com> | 2015-03-16 22:54:44 +0000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2015-03-16 22:54:44 +0000 |
| commit | 49fe6dc89a45a5791cfa8dad86f25469749f2312 (patch) | |
| tree | 20c6f41f68d3a3d177704a1b914a8a9a2d6ccccf /stmhal/rtc.c | |
| parent | 3cb766344ddd214c29d682929b78ae228b899c0b (diff) | |
stmhal: Add config option to use LSE/LSI for RTC.
Most boards (except the pyboard) don't have a 32kHz crystal so they
should use the LSI for the RTC.
Diffstat (limited to 'stmhal/rtc.c')
| -rw-r--r-- | stmhal/rtc.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/stmhal/rtc.c b/stmhal/rtc.c index 2bbe5b10c..b4fa69e86 100644 --- a/stmhal/rtc.c +++ b/stmhal/rtc.c @@ -256,18 +256,29 @@ void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc) { __HAL_RCC_BACKUPRESET_RELEASE(). - Configure the needed RTc clock source */ - // set LSE as RTC clock source + // RTC clock source uses LSE (external crystal) only if relevant + // configuration variable is set. Otherwise it uses LSI (internal osc). + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; + #if defined(MICROPY_HW_RTC_USE_LSE) && MICROPY_HW_RTC_USE_LSE RCC_OscInitStruct.LSEState = RCC_LSE_ON; RCC_OscInitStruct.LSIState = RCC_LSI_OFF; + #else + RCC_OscInitStruct.LSEState = RCC_LSE_OFF; + RCC_OscInitStruct.LSIState = RCC_LSI_ON; + #endif if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { //Error_Handler(); return; } PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; + #if defined(MICROPY_HW_RTC_USE_LSE) && MICROPY_HW_RTC_USE_LSE PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; + #else + PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; + #endif if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { //Error_Handler(); return; |