TMS320F28034: Wake up device from halt mode failed

/*
 * f2803x_lpm.c
 *
 *  Created on: 2018-4-16
 *      Author: Administrator
 */

#include "global.h"
#include "Driver.h"
#include "General.h"
#include "f2803x_lpm.h"

__interrupt void f2803x_lpm_wake_isr(void);

void init_f2803x_lpm(void)
{
	EALLOW;
	//GpioCtrlRegs.GPAPUD.bit.GPIO25 = 1;
	//GpioCtrlRegs.GPAMUX2.bit.GPIO25 = 0;    //GPIO
	GpioCtrlRegs.GPADIR.bit.GPIO25 = 0;     // 0 - input mode; 1 - output mode
	GpioIntRegs.GPIOLPMSEL.bit.GPIO25 = 1;  // Choose GPIO8 pin for wakeup
	EDIS;

	// 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.WAKEINT = &f2803x_lpm_wake_isr;
	EDIS;

}

void f2803x_lpm_handler(void)
{
	static TIMER_T tTime;      //3Sʱ���ʱ
	App_TimeBase(MS_BASE, &tTime);

	if(GpioDataRegs.GPADAT.bit.GPIO25 == 1)
	{
		if(tTime.DelayTime >= 1000)
		{
			// 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.bit.ACK1 = 1;
			// Enable global Interrupts:
			EINT;   // Enable Global interrupt INTM

			// Write the LPM code value
			EALLOW;
			if (SysCtrlRegs.PLLSTS.bit.MCLKSTS != 1) // Only enter low power mode when PLL is not in limp mode.
			{
				SysCtrlRegs.LPMCR0.bit.LPM = 0x0002;   // LPM mode = Halt
			}
			EDIS;

			// Force device into HALT
			__asm(" IDLE");                         // Device waits in IDLE until falling edge on GPIO0/XNMI pin
		}
	}
	else
	{
		tTime.DelayTime = 0;
	}
}

__interrupt void f2803x_lpm_wake_isr(void)
{
	//GpioDataRegs.GPATOGGLE.bit.GPIO1 = 1;	// Toggle GPIO1 in the ISR - monitored with oscilloscope
	PieCtrlRegs.PIEIER1.bit.INTx8 = 1;
	PieCtrlRegs.PIEACK.bit.ACK1 = 1;
}