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Init RCC on a STM32F3 (SOLVED)

JAlca
Senior

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The init of RCC was correct. The SystemCoreClock variable dont reflect the new frecuency changes still "SystemCoreClockUpdate" is called.

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Hi all,

I'm triyng to initialice the clock using CMSIS, but it dosnt work.

I want to init RCC wirh HSI at 32MHz. If I do it from CUBE, and then read "SystemCoreClok" it says 32000000. But if I do it with CMSIS, "SystemCoreClock" always return 8000000.

I checked the registers value, and they are identical in booth methodes.

Any advice?

This is my code:

RCC->CR |= RCC_CR_HSION;
  	while(!(RCC->CR & RCC_CR_HSIRDY));
 
	RCC->CR &= ~RCC_CR_PLLON;                 //Stop PLL
	while(RCC->CR & RCC_CR_PLLRDY);           //Wait until stop
 
	RCC->CFGR &= ~RCC_CFGR_PLLSRC;    //PLL Source (16) 0 HSI
 
	RCC->CFGR &= ~RCC_CFGR_PLLMUL;
	RCC->CFGR |= RCC_CFGR_PLLMUL_2 | RCC_CFGR_PLLMUL_1;   //PLLMUL x8
 
	RCC->CR |= RCC_CR_PLLON;
	while(!(RCC->CR & RCC_CR_PLLRDY));
 
  	RCC->CFGR &= ~RCC_CFGR_SW;
  	RCC->CFGR |= RCC_CFGR_SW_PLL;
 
 
	frec = SystemCoreClock;

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