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stm32: Allow a board to configure the HSE in bypass mode.

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To use HSE bypass mode the board should define:

    #define MICROPY_HW_CLK_USE_BYPASS (1)

If this is not defined, or is defined to 0, then HSE oscillator mode is
used.
This commit is contained in:
Damien George
2018-04-11 16:46:47 +10:00
parent 68b70fac5c
commit cf9fc7346d
4 changed files with 11 additions and 4 deletions
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2
ports/stm32/system_stm32.c
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@@ -404,7 +404,7 @@ void SystemClock_Config(void)
/* Enable HSE Oscillator and activate PLL with HSE as source */
#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7)
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEState = MICROPY_HW_CLK_HSE_STATE;
RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
#if defined(STM32H7)
RCC_OscInitStruct.CSIState = RCC_CSI_OFF;