Posted on December 03, 2013 at 23:03
No, I'm saying use it to determine the clock basis when it comes back.
RCC_ClocksTypeDef RCC_ClockFreq;
/* This function fills the RCC_ClockFreq structure with the current
frequencies of different on chip clocks (for debug purpose) **************/
RCC_GetClocksFreq(&RCC_ClockFreq);
/**
* @brief Returns the frequencies of the System, AHB and APB busses clocks.
* @note The frequency returned by this function is not the real frequency
* in the chip. It is calculated based on the predefined constant and
* the source selected by RCC_SYSCLKConfig():
*
* @note If SYSCLK source is HSI, function returns constant HSI_VALUE(*)
*
* @note If SYSCLK source is HSE, function returns constant HSE_VALUE(**)
*
* @note If SYSCLK source is PLL, function returns constant HSE_VALUE(**)
* or HSI_VALUE(*) multiplied by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f0xx.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature, refer to RCC_AdjustHSICalibrationValue().
*
* (**) HSE_VALUE is a constant defined in stm32f0xx.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* return wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param RCC_Clocks: pointer to a RCC_ClocksTypeDef structure which will hold
* the clocks frequencies.
*
* @note This function can be used by the user application to compute the
* baudrate for the communication peripherals or configure other parameters.
* @note Each time SYSCLK, HCLK and/or PCLK clock changes, this function
* must be called to update the structure's field. Otherwise, any
* configuration based on this function will be incorrect.
*
* @retval None
*/
void RCC_GetClocksFreq(RCC_ClocksTypeDef* RCC_Clocks)
......
typedef struct
{
uint32_t SYSCLK_Frequency;
uint32_t HCLK_Frequency;
uint32_t PCLK_Frequency;
uint32_t ADCCLK_Frequency;
uint32_t CECCLK_Frequency;
uint32_t I2C1CLK_Frequency;
uint32_t USART1CLK_Frequency;
}RCC_ClocksTypeDef;
