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changed the stm32f1xx_hal_rcc.c to handle the HSE init properly #4777

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changed the stm32f1xx_hal_rcc.c to handle the HSE init properly #4777

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17 changes: 17 additions & 0 deletions targets/TARGET_STM/TARGET_STM32F1/device/stm32f1xx_hal_rcc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,23 @@ HAL_StatusTypeDef HAL_RCC_OscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct)
}
else
{
if((__HAL_RCC_GET_FLAG(RCC_CR_HSEBYP) != RESET) && (RCC_OscInitStruct->HSEState == RCC_HSE_ON))
{
/* if it's in bypass mode, and the new mode is HSE_ON, must disable the bypass first
which requires HSE off to be changed*/
CLEAR_BIT(RCC->CR, RCC_CR_HSEON); \
CLEAR_BIT(RCC->CR, RCC_CR_HSEBYP); \
tickstart = HAL_GetTick();

/* Wait till HSE is disabled */
while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
{
if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
}
/* Set the new HSE configuration ---------------------------------------*/
__HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState);

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