Greetings! :)
Usecase:
Nucleo-F756ZG
CubeMx 6.8.0
Set PLL to 216 Mhz,
Enable RCC->Tim prescaler selection.
On "Clock Configuration" set 216 Mhz for APB1 Timer clocks
When use HAL, It works fine. PeriphCommonClock_Config() has been genereated, but if i change on LL, autogenerated code will not set TIMPRE bit configuration in the RCC_DCKCFGR register.
void PeriphCommonClock_Config(void)
{
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_TIM;
PeriphClkInitStruct.TIMPresSelection = RCC_TIMPRES_ACTIVATED;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
}
As the datasheet mentioned:
"The timers connected to APB2 are clocked from TIMxCLK up to 216 MHz, while the timers connected to APB1 are clocked
from TIMxCLK either up to 108 MHz or 216 MHz depending on TIMPRE bit configuration in the RCC_DCKCFGR register."
Perhaps missing function is:
__STATIC_INLINE void LL_RCC_SetTIMPrescaler(uint32_t Prescaler)
{
MODIFY_REG(RCC->DCKCFGR1, RCC_DCKCFGR1_TIMPRE, Prescaler);
}
Dudo
