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stm32/powerctrl: Support using PLLI2C on STM32F413 as USB clock source.

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So SYSCLK can run at more varied frequencies, eg 100MHz.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2021-04-07 11:58:36 +10:00
parent 00963a4e69
commit f4340b7e62
2 changed files with 50 additions and 18 deletions
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4
ports/stm32/system_stm32.c
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@@ -351,8 +351,8 @@ void SystemClock_Config(void) {
uint32_t vco_out = RCC_OscInitStruct.PLL.PLLN * (MICROPY_HW_CLK_VALUE / 1000000) / RCC_OscInitStruct.PLL.PLLM;
uint32_t sysclk_mhz = vco_out / RCC_OscInitStruct.PLL.PLLP;
bool need_pllsai = vco_out % 48 != 0;
if (powerctrl_rcc_clock_config_pll(&RCC_ClkInitStruct, sysclk_mhz, need_pllsai) != 0) {
bool need_pll48 = vco_out % 48 != 0;
if (powerctrl_rcc_clock_config_pll(&RCC_ClkInitStruct, sysclk_mhz, need_pll48) != 0) {
__fatal_error("HAL_RCC_ClockConfig");
}