APB1PeriphClock

[John Hite]

Posted on March 15, 2017 at 17:38

Is there a function or macro for determining the frequency of APB1PeriphClock and APB2PeriphClock?

Thanks,

jh

#apb1periphclock

[Tesla DeLorean · Accepted solution]

Posted on March 15, 2017 at 18:07

  RCC_ClocksTypeDef RCC_Clocks;

  /* SysTick end of count event each 1ms */

  RCC_GetClocksFreq(&RCC_Clocks);

  printf('SYS:%d H:%d, P1:%d, P2:%d\r\n',

                      RCC_Clocks.SYSCLK_Frequency,                      RCC_Clocks.HCLK_Frequency,   // AHB                      RCC_Clocks.PCLK1_Frequency,  // APB1                      RCC_Clocks.PCLK2_Frequency); // APB2

[Khouloud GARSI]

Posted on March 15, 2017 at 18:51

Hi

Hite.John

,

• In SPL you can use 'RCC_GetClocksFreq' which returns the frequencies of different on chip clocks: SYSCLK, HCLK, PCLK1 and PCLK2.

void RCC_GetClocksFreq(RCC_ClocksTypeDef* RCC_Clocks)

• In cube, there is:

uint32_t HAL_RCC_GetPCLK1Freq(void) : Returns the PCLK1 frequency

uint32_t HAL_RCC_GetPCLK2Freq(void) : Returns the PCLK2 frequency

Khouloud

[John Hite]

Posted on March 15, 2017 at 18:59

I thank you both.

John