void GetSystemClocks(void)
{
        uint32_t SYSCLK,HCLK,PCLK1,PCLK2;
        RCC_ClocksTypeDef RCC_Clock;
       
        RCC_GetClocksFreq(&RCC_Clock);
        SYSCLK = RCC_Clock.SYSCLK_Frequency;
        HCLK = RCC_Clock.HCLK_Frequency;
        PCLK1 = RCC_Clock.PCLK1_Frequency;
        PCLK2 = RCC_Clock.PCLK2_Frequency;
}