Problems setting up clocks, STM32F401RE

Posted on October 04, 2016 at 09:47

Hello I am using a nucleoboard and am trying to set up all the clocks using this:

RCC_ClocksTypeDef RCC_Clocks;

RCC_HSICmd(ENABLE);

RCC_HCLKConfig(RCC_SYSCLK_Div1);

RCC_PCLK2Config(RCC_HCLK_Div1);

RCC_PCLK1Config(RCC_HCLK_Div2);

RCC_PLLConfig(RCC_PLLSource_HSI, 16, 336, 4, 2);

RCC_PLLCmd(ENABLE);

while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

while (RCC_GetSYSCLKSource() != 0x08);

RCC_GetClocksFreq(&RCC_Clocks);

uint32_t clock = RCC_Clocks.SYSCLK_Frequency;

However clock is not the 84MHz I expected, it is 131250000. What am I doing wrong?

#stm32f4