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LSE bypass implemented on STM32F1xx. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10110 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
Giovanni Di Sirio 2017-02-23 10:06:45 +00:00
parent 4140ae5815
commit 3c720a3327
2 changed files with 7 additions and 0 deletions
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6
os/hal/ports/STM32/STM32F1xx/hal_lld.c
View File

@ -66,7 +66,13 @@ static void hal_lld_backup_domain_init(void) {
/* If enabled then the LSE is started.*/ /* If enabled then the LSE is started.*/
#if STM32_LSE_ENABLED #if STM32_LSE_ENABLED
#if defined(STM32_LSE_BYPASS)
/* LSE Bypass.*/
RCC->BDCR |= RCC_BDCR_LSEON | RCC_BDCR_LSEBYP;
#else
/* No LSE Bypass.*/
RCC->BDCR |= RCC_BDCR_LSEON; RCC->BDCR |= RCC_BDCR_LSEON;
#endif
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0) while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */ ; /* Waits until LSE is stable. */
#endif /* STM32_LSE_ENABLED */ #endif /* STM32_LSE_ENABLED */

1
os/hal/ports/STM32/STM32F1xx/hal_lld.h
View File

@ -20,6 +20,7 @@
* @pre This module requires the following macros to be defined in the * @pre This module requires the following macros to be defined in the
* @p board.h file: * @p board.h file:
* - STM32_LSECLK. * - STM32_LSECLK.
* - STM32_LSE_BYPASS (optionally).
* - STM32_HSECLK. * - STM32_HSECLK.
* - STM32_HSE_BYPASS (optionally). * - STM32_HSE_BYPASS (optionally).
* . * .