psm.c

ADI公司的ARM7的功能模块的源码

/*********************************************************************

 Author        : ADI - Apps            www.analog.com/MicroConverter

 Date          : Sept. 2005

 File          : PSM.c

 Hardware      : Applicable to ADuC702x rev H or I silicon
                 Currently targetting ADuC7026.

 Description   : the PSM produces an interrupt when the supply goes below 3.07V
		
*********************************************************************/
#include<aduc7026.h>

void delay(int);
void My_IRQ_Function(void);				//	IRQ Funtion Prototype 

int main(void){

	IRQ = My_IRQ_Function;				// 	Specify Interrupt Service Rountine 
	GP4DAT = 0x04000000;				// P4.2 configured as an output. LED is turned on	
	PSMCON = 0x6;						// trip point of 3.07V
	IRQEN = PSM_BIT;					//	Enable PSM in IRQEnable 
while (1){
	delay(200000);
	}				
}
/********************************************************************/
/*                                                                  */
/*		Interrupt Service Rountine									*/
/*                                                                  */
/********************************************************************/

void My_IRQ_Function(){
	if ((IRQSTA & PSM_BIT) != 0){
		while (!(PSMCON&0x8)){}		   			// Check that the level is back to normal
		PSMCON = 0x7;							// Clear interrupt
		GP4DAT ^= 0x00040000;					// Complement P4.2
	} 				
	return ;
}

void delay (int length) {
   	while (length >=0)
    	length--;
}