watchdog.c

LPC2220的Bootloader自己写的,和 周立功的模版实现完全不一样

//***************************************************************
//  ARM BOOT ROUTE VER1.0@0x0C000000 for 44B0X release
//  [e-mail]
//  chenjun @ 2005-6-10
//***************************************************************


#include "..\inc\watchdog.h"
#include "..\inc\NXP_ARM.h"
#include "..\inc\sysinit.h"
#include "..\inc\common.h"

void Disable_WatchDog(void)
{
	rWDMOD = 0x00;
	return;
}

void Enable_WatchDog(void)
{
	rWDMOD = 0x3;
	rWDTC = PCLK >> 1;
	rWDFEED = 0xaa;
	rWDFEED = 0x55;
	return;
}

void Cls_WatchDog(void)
{
	rWDTC = PCLK >> 1;
	return;
}

void SystemReset(void)
{	
	rWDMOD = 0x3;
	rWDTC = 0xff;
	rWDFEED = 0xaa;
	rWDFEED = 0x55;
	for(;;);
	return;
}