I generate project for g431 in STM32CubeIDE Version: 1.19.0 and HAL generated code is setting PLLCFGR correctly but switching to LL values are not entered.
Code generated for LL below:
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);
while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_4)
{
}
LL_PWR_EnableRange1BoostMode();
LL_RCC_HSE_Enable();
/* Wait till HSE is ready */
while(LL_RCC_HSE_IsReady() != 1)
{
}
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_2, 85, LL_RCC_PLLR_DIV_2);
LL_RCC_PLL_EnableDomain_SYS();
LL_RCC_PLL_Enable();
/* Wait till PLL is ready */
while(LL_RCC_PLL_IsReady() != 1)
{
}
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2);
/* Wait till System clock is ready */
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
{
}
/* Insure 1us transition state at intermediate medium speed clock*/
for (__IO uint32_t i = (170 >> 1); i !=0; i--);
/* Set AHB prescaler*/
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
LL_SetSystemCoreClock(170000000);
/* Update the time base */
if (HAL_InitTick (TICK_INT_PRIORITY) != HAL_OK)
{
Error_Handler();
}
}
Code is not following manual which says:
To modify the PLL configuration, proceed as follows:
1. Disable the PLL by setting PLLON to 0 in Clock control register (RCC_CR).
2. Wait until PLLRDY is cleared. The PLL is now fully stopped.
3. Change the desired parameter.
4. Enable the PLL again by setting PLLON to 1.
5. Enable the desired PLL outputs by configuring PLLPEN, PLLQEN, PLLREN in PLL
configuration register (RCC_PLLCFGR).
PLL is not stopped in LL driver. Adding LL_RCC_PLL_Disable() is fixing this.
