void LowPower_CLK_Config(void)
{
CLK_SYSCLKSourceSwitchCmd(ENABLE);//使能时钟切换
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_LSI);//选择内部低速时钟作为时钟源
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);//设置系统时钟分频
while (CLK_GetSYSCLKSource() != CLK_SYSCLKSource_LSI);//等待时钟稳定
CLK_HSICmd(DISABLE); //关闭原先的 CLK source
CLK_HSEConfig(CLK_HSE_OFF); //关闭外部 CLK source
}
/**
* @brief Configure System Clock
* @param None
* @retval None
*/
static void CLK_Config(void)
{
/* Select HSE as system clock source */
CLK_SYSCLKSourceSwitchCmd(ENABLE);
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSE);
/* system clock prescaler: 1*/
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
while (CLK_GetSYSCLKSource() != CLK_SYSCLKSource_HSE)
{}
}
/***********************************************************************
* @brief Configure System Clock
* @param None
* @retval None
************************************************************************/
static void CLK_Config(void)
{
// Select HSI as system clock source
CLK_SYSCLKSourceSwitchCmd(ENABLE);
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI);
// system clock prescaler: 1
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
while (CLK_GetSYSCLKSource() != CLK_SYSCLKSource_HSI)
{}
}
/**
* @brief Configure peripherals Clock
* @param None
* @retval None
*/
static void CLK_Config(void)
{
/* High speed internal clock prescaler: 1 */
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
/* Select HSE as system clock source */
CLK_SYSCLKSourceSwitchCmd(ENABLE);
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSE);
while (CLK_GetSYSCLKSource() != CLK_SYSCLKSource_HSE)
{}
/* Enable TIM4 CLK */
CLK_PeripheralClockConfig(CLK_Peripheral_TIM4, ENABLE);
}
/**
* @brief Configure peripheral clock
* @param None
* @retval None
*/
static void CLK_Config(void)
{
/* Select HSE as system clock source */
CLK_SYSCLKSourceSwitchCmd(ENABLE);
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSE);
/*High speed external clock prescaler: 1*/
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_2);
while (CLK_GetSYSCLKSource() != CLK_SYSCLKSource_HSE)
{}
/* Enable SPI clock */
CLK_PeripheralClockConfig(CLK_Peripheral_SPI1, ENABLE);
/* Enable DMA clock */
CLK_PeripheralClockConfig(CLK_Peripheral_DMA1, ENABLE);
}
