small_water_meter_4g_src/Drivers/Board/low_pwr_drv.c

 
#include "board.h"

void debug_stop(void)
{
    M0P_DEBUG_ACTIVE->DEBUG_ACTIVE = (1<<12) |      // LPTIM1, 0:normal; 1:pause at STOP;
                                     (1<< 9) |      // RTC,    0:normal; 1:pause at STOP;
                                     (1<< 8) |      // WDT,    0:normal; 1:pause at STOP;
                                     (1<< 3);       // LPTIM0, 0:normal; 1:pause at STOP;
}


void EnterLowPower(void)
{
#ifdef SLEEPDEEP_ENABLE
//    uint8_t Flag;
    
//    WaitExpireTime();
//    rt_hw_interrupt_disable();  // PRIMASK = 0x1u;
    if (DMA_Busy() | FinSh_Txbuf_Busy()){
        SCB->SCR = (0x0<<SCB_SCR_SEVONPEND_Pos)    |
                   (0x0<<SCB_SCR_SLEEPDEEP_Pos)    |   // sleep
                   (0x0<<SCB_SCR_SLEEPONEXIT_Pos);
//        Flag = 0x0u;
//        rt_hw_interrupt_enable(0x0u);   // PRIMASK = 0x0u;
    } else {
        SCB->SCR = (0x0<<SCB_SCR_SEVONPEND_Pos)    |
                   (0x1<<SCB_SCR_SLEEPDEEP_Pos)    |   // deepsleep or stop
                   (0x0<<SCB_SCR_SLEEPONEXIT_Pos);
//        Flag = 0x1u;
    }
#else
    SCB->SCR = (0x0<<SCB_SCR_SEVONPEND_Pos)    |
               (0x0<<SCB_SCR_SLEEPDEEP_Pos)    |   // sleep
               (0x0<<SCB_SCR_SLEEPONEXIT_Pos);
#endif

#ifdef DEBUG_ENABLE
//    LED_Off();
#endif

    __WFI();

#ifdef DEBUG_ENABLE
//    LED_On();
#endif

#ifdef SLEEPDEEP_ENABLE
//    if (Flag){
//        CalExpireTime(150);     // if awaked up, cant not enter deepsleep until 150us later
//        rt_hw_interrupt_enable(0x0u);   // PRIMASK = 0x0u;
//    }
#endif
}