TestSleep.c

int main(void) {
	SwitchMatrix_Init();
	  GPIOInit();
	  GPIOSetDir( 0, 0, 1 );
	  GPIOSetDir( 0, 2, 1 );

	    if(LPC_PMU->PCON & (1 << 11)) {
	        // DPDFLAG(11)が立ってるので、deep power-downからの復帰である。
	        //	同フラグをクリア
	        LPC_PMU->PCON &= ~(1 << 11);
	    	// Needed?
	    	NVIC_ClearPendingIRQ(WKT_IRQn);
	    	NVIC_DisableIRQ(WKT_IRQn);
	    	LPC_PMU->DPDCTRL = 0;
	    	SCB->SCR = 0;
	    	LPC_WKT->CTRL |= (1 << 1) | (1 << 2);
	    }
while(1){

	  GPIOSetBitValue(0, 0, 0);
	  GPIOSetBitValue(0, 2, 1);
	  /* alarm/wake timer as wakeup source */
	  LPC_SYSCON->STARTERP1 = 0x1<<15;
	  /* gpio as wakeup source (PINT7)*/
	  LPC_SYSCON->STARTERP0 = 0x1<<7;
	  GPIOSetPinInterrupt( CHANNEL7, PORT0, 4, 1, 0 );

		  LPC_PMU->PCON = 0x1;//deepsleep 0x1 powerdown 0x2

		  LPC_SYSCON->PDSLEEPCFG &= ~(WDT_OSC_PD | BOD_PD);
		  LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;


		  SCB->SCR |= NVIC_LP_SLEEPDEEP;
		  LPC_PMU->DPDCTRL |= (0x1 << 2);

		  // Self wake-up timer (WKT)の有効化
		  // UM10601 13.3 Basic configuration
		  LPC_SYSCON->SYSAHBCLKCTRL |= (0x1 << 9);
			LPC_SYSCON->PRESETCTRL &= ~(0x1 << 9);
			LPC_SYSCON->PRESETCTRL |= (0x1 << 9);

			//Use 10khz low power clock
				LPC_WKT->CTRL |= WKT_CLKSEL;

		  LPC_WKT->COUNT = 10*1500;

		  NVIC_EnableIRQ(WKT_IRQn);

	    //  Use the ARM WFI instruction.
	    __WFI();
		  GPIOSetBitValue(0, 0, 1);
		  GPIOSetBitValue(0, 2, 1);

		    // Deep power-downの処理
		    // UM10601 5.6.3 Deep power-down control register
		    LPC_PMU->DPDCTRL |= (1 << 0) | (1 << 2) | (1 << 3);  // Hysteresis for WAKEUP pin enabled

		    // UM10601 5.6.1 Power control register
		    LPC_PMU->PCON &= ~(1 << 3); // NODPD = 0
		    LPC_PMU->PCON |= 0x3; // PM = 0x3
		    // UM10601 5.3.1.1 System control register
		    SCB->SCR |= (1 << 2);  // SLEEPDEEP = 1

		    /// Self wake-up timer (WKT)設定
		    // 13.6.1 Control register
		    LPC_WKT->CTRL |= (1 << 0); // CLKSEL = 1  10KHzのlow power clockを利用
		    LPC_WKT->COUNT = 30000; // 10KHzなので、3秒に設定

		    //  Use the ARM WFI instruction.
		    __WFI();
}
    return 0 ;
}