main.c

这是一个基于LPC2148的看门狗定时程序

/****************************************Copyright (c)

**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-----------------------------------------------------------------

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** File name:			main.c
** Last modified Date:  2004-09-16
** Last Version:		1.0
** Descriptions:		The main() function example template
**
**----------------------------------------------------------------------------------------

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** Created by:			Chenmingji
** Created date:		2004-09-16
** Version:				1.0
** Descriptions:		The original version
**
**----------------------------------------------------------------------------------------

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** Modified by:
** Modified date:
** Version:
** Descriptions:
**
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#include "config.h"
#define  LEDCON1 1<<8
#define  LEDCON2 1<<9
#define  KEY 1<<12
#define  WDT 0


void __irq IRQ_WDT(void)
{
   uint32 i;
   
    IOCLR = LEDCON2;
    for(i=0;i<0x7FFFFF;i++);
    IOSET = LEDCON2;
    
 
  VICIntEnable = 0x00000001; 
  
  WDMOD = 0;

  VICVectAddr = 0x00;
 }
 
 
 
 
int main (void)
{
  uint32 i;
  PINSEL0 = 0x00000000;      //设置IO口，P0.14设置为EINT1  
  IODIR   = LEDCON1|LEDCON2;

  IOSET   = LEDCON1|LEDCON2;
  
  
  VICIntSelect =0;  //中断选择寄存器，0表示分配为IRQ中断，1为FIQ中断
  VICVectCntl0=0x20;   //设置优先级，为最高
  VICVectAddr0=(int)IRQ_WDT;  //设置向量地址
  VICIntEnable = 0x00000001;  //使能中断源，EINT1的中断源地址为这么多
 
  WDTC = 0x6006;
  WDMOD = 0x01;
  WDFEED = 0xAA;
  WDFEED = 0x55; 
  while(1)
  {
    while((IOPIN&KEY)==0);
    for(i=0;i<0xff;i++)
    {
      for(i=0;i<0x0fff;i++);
      WDFEED = 0xAA;
      WDFEED = 0x55; 
    }
      if((IOSET&LEDCON1)==0)
      IOSET = LEDCON1;
       else
      IOCLR = LEDCON1;
  }
     return( 0);

}
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**                            End Of File
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