changing the prescaler of AHB and APB on STM32F4

Posted on June 22, 2014 at 11:22

Hello everybody, is it possible to chage the prescaler of the bus APB or AHB on the STM32F4 dev board. In fact, I was taking a look on the library system_stm32f4xx.c and it was descripbing a few setting oh the microcontrollers including the prescaler of AHB, APB1 and APB2 (1, 4 and 2). So I am juste wondering if it's possible and if it is, wich function does the job.

NB : the functions are certainly not 

void RCC_PCLK1Config(uint32_t RCC_HCLK)

and

void RCC_PCLK2Config(uint32_t RCC_HCLK)

because in their description, they mensionned that they ''configure the Low Speed APB clock'' and not set the value of the prescaler as does

 

void TIM_PrescalerConfig(TIM_TyoeDEF*  TIMx, uint16_t Prescaler, uint16_t TIM_PSCReloadMode )

and there are only 5 values possible to configure the clock wich not as chould be for a prescaler configuration.

Thank you for your support and have a nice day ;)

void RCC_PCLK1Config ( uint32_t  RCC_HCLK )

#abp #ahb #stm32f4