TMS320F28377D:Standby mode in Low Power Mode(LPM) Test method

#include "F28x_Project.h"

// Function Prototypes
//
void Gpio_setup(void);
void PwmTimerIsrSetUp(void);

__interrupt void local_WAKE_ISR(void);

void main(void)
{
    // Step 1. Initialize System Control:
    // PLL, WatchDog, enable Peripheral Clocks
    // This example function is found in the F2837xD_SysCtrl.c file.
    //

    InitSysCtrl();

    InitGpio();

    // Step 2. Initialize GPIO:
    // This example function is found in the F2837xD_Gpio.c file and
    // illustrates how to set the GPIO to it's default state.
       Gpio_setup();

    // enable PWM1, PWM2 and PWM3
       CpuSysRegs.PCLKCR2.bit.EPWM1=1;
       //CpuSysRegs.PCLKCR2.bit.EPWM2=1;
       //CpuSysRegs.PCLKCR2.bit.EPWM3=1;


    // Step 3. Clear all __interrupts and initialize PIE vector table:
    // Disable CPU __interrupts
       DINT;  // global interrupt switch off


    // Initialize PIE control registers to their default state.
    // The default state is all PIE __interrupts disabled and flags
    // are cleared.
    // This function is found in the F2837xD_PieCtrl.c file.
       //PIE(Peripheral Interrupt Expansion) initializing
       //PIE disable and PIEIER, PIEIER register clear
       InitPieCtrl();


    // Disable CPU __interrupts and clear all CPU __interrupt flags:
       IER = 0x0000; //Core Interrupts Enable Resister initializing
       IFR = 0x0000; //Core Interrupts Flag Resister initializing


    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    // This will populate the entire table, even if the __interrupt
    // is not used in this example.  This is useful for debug purposes.
    // The shell ISR routines are found in F2837xD_DefaultIsr.c.
    // This function is found in F2837xD_PieVect.c.
       InitPieVectTable();

       // Interrupts that are used in this example are re-mapped to
       // ISR functions found within this file.
       EALLOW;  // This is needed to write to EALLOW protected registers
       PieVectTable.WAKE_INT = &local_WAKE_ISR;
       EDIS;

       // Enable CPU INT1 which is connected to WakeInt:
       IER |= M_INT1;

       // Enable WAKEINT in the PIE: Group 1 interrupt 8
       PieCtrlRegs.PIEIER1.bit.INTx8 = 1;
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
       PieCtrlRegs.PIEACK.bit.ACK1 = 1;
       // Enable global Interrupts:
       EINT;

       PwmTimerIsrSetUp();

    // Enable global Interrupts and higher priority real-time debug events:
       EINT;  // Enable Global interrupt INTM
       ERTM;  // Enable Global realtime interrupt DBGM

    // Step 4. User specific code:

       //
       // Ensure there are no subsequent flash accesses to wake up the pump and
       // bank Power down the flash bank and pump
       //
//       SeizeFlashPump();
//       FlashOff();
//       ReleaseFlashPump();

       // enter STANDBY mode
       STANDBY();

       for(;;)
       {

       }
}

/* ----------------------------------------------- */
/* ISR for WAKEINT - Will be executed when         */
/* low pulse triggered on GPIO pin                */
/* ------------------------------------------------*/
interrupt void local_WAKE_ISR(void)
{
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
    PieCtrlRegs.PIEACK.bit.ACK1 = 1;
}

#include "F28x_Project.h"

void Gpio_setup(void);
void InitSciaGpio(void);


void Gpio_setup(void)
{
    EALLOW;
    GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
    GpioCtrlRegs.GPAMUX2.all = 0x00000000;  // All GPIO
    GpioCtrlRegs.GPBMUX1.all = 0x00000000;  // All GPIO

    GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF;   // All outputs
    GpioCtrlRegs.GPBDIR.all = 0x00001FFF;   // All outputs

    // HeartBit LED                         // 20191107 SHD
    GpioCtrlRegs.GPDMUX1.bit.GPIO99 = 0;
    GpioCtrlRegs.GPDDIR.bit.GPIO99 = 1;

    //20230630 the external wake-up source
    //GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0;   // Enable pullup on GPIO25
    GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 0;    // 0=GPIO
    GpioCtrlRegs.GPADIR.bit.GPIO18 = 0;     // 1=OUTput,  0=INput
    CpuSysRegs.GPIOLPMSEL0.bit.GPIO18 = 1;  // GPIO24 will wake the device
    CpuSysRegs.LPMCR.bit.QUALSTDBY = 2;     // Qualify GPIO24 by 2 OSCCLK
    EDIS;

    GPIO_SetupPinMux(16, GPIO_MUX_CPU1, 0);

    // PWM
    InitEPwmGpio();
}