STM32的停机模式与唤醒

HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_DMA_Init();
MX_ADC_Init();
MX_LPUART1_UART_Init();
MX_USART1_UART_Init();
MX_RTC_Init();
WorkFinished=0;//工作没有完成
while(1)
 {
      LED1_ON; LED2_ON; LED3_ON;HAL_Delay (500);
      printf ("Before Stop   \r\n");
      if(WorkFinished){
        HAL_PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);//进入停止模式
      }
      LED1_OFF; LED2_OFF; LED3_OFF;
      printf ("After Stop   \r\n");         
 }

//用于停机模式的声明
#define PWR_Regulator_LowPower ((uint32_t)0x00000001)
#define PWR_STOPEntry_WFI ((uint8_t)0x01)

void HAL_PWR_EnterSTOPMode(uint32_t Regulator, uint8_t STOPEntry)
{
uint32_t tmpreg = 0U;
/ Check the parameters /
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_STOP_ENTRY(STOPEntry));
/ Select the regulator state in Stop mode ---------------------------------/
tmpreg = PWR->CR;
/ Clear PDDS and LPDS bits /
CLEAR_BIT(tmpreg, (PWR_CR_PDDS | PWR_CR_LPSDSR));
/ Set LPSDSR bit according to PWR_Regulator value /
SET_BIT(tmpreg, Regulator);
/ Store the new value /
PWR->CR = tmpreg;
/ Set SLEEPDEEP bit of Cortex System Control Register /
SET_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
/ Select Stop mode entry --------------------------------------------------/
if(STOPEntry == PWR_STOPENTRY_WFI)
{
/ Request Wait For Interrupt /
WFI();
}
else
{
/ Request Wait For Event /
SEV();
WFE();
WFE();
}
/ Reset SLEEPDEEP bit of Cortex System Control Register /
CLEAR_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
}
程序正常启动后三个灯闪烁(PB12|PB13|PB14)，按键后进入停机模式，再按键程序继续执行。

耗电：148uA。

标签：Regulator,STOPEntry,PWR,停机,tmpreg,STM32,Init,唤醒,MX
来源： https://blog.51cto.com/dawn0919/2406270