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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/stm32_it.c
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@@ -369,7 +369,7 @@ STATIC void OTG_CMD_WKUP_Handler(PCD_HandleTypeDef *pcd_handle) {
/* Configures system clock after wake-up from STOP: enable HSE, PLL and select
PLL as system clock source (HSE and PLL are disabled in STOP mode) */
__HAL_RCC_HSE_CONFIG(RCC_HSE_ON);
__HAL_RCC_HSE_CONFIG(MICROPY_HW_CLK_HSE_STATE);
/* Wait till HSE is ready */
while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET)