main.c

arm7 lpc2103 的keil 程序开发包 非常有参考价值

/****************************************Copyright (c)**************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                 http://www.zyinside.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:           main.c
** Last modified Date:  2006-02-22
** Last Version:        1.0
** Descriptions:        header file of the specific codes for LPC2200 target boards
**              Every project should include a copy of this file, user may modify it as needed
**------------------------------------------------------------------------------------------------------
** Modified by: 
** Modified date:
** Version: 
** Descriptions: 
**
********************************************************************************************************/

#define IN_MAIN
#include "config.h"
#include "watchdog.h"

#define  INT_WDT     0        //看门狗中断号

#define  BEEP        1<<7	  //P0.7  控制蜂鸣器

#pragma import(__use_no_semihosting_swi)        //don't delete this line
/*********************************************************************************************************
** Function name:			IRQ_Exception
**
** Descriptions:			interrupt exceptional handler , change it as needed
**                          don't delete this function 
** input parameters:		None
** Returned value:			None
**         
**
** Created by:				Chenmingji
** Created Date:			2006/02/22
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void  IRQ_Exception(void)
{
}


/*********************************************************************************************************
** 函数名称： WDT_ISR（）
** 函数功能： 看门狗中断服务函数。
** 入口参数： 无 
** 出口参数： 无 
********************************************************************************************************/
void WDT_ISR(void)
{
    uint32 i;
    
    //蜂鸣器鸣叫
    IO0CLR = BEEP;
    for(i = 0; i < 0x7fffff; i++);
    IO0SET = BEEP;
    
    WDMOD = 0; 				   //清零看门狗超时标志

    VICIntEnClr = 1<<INT_WDT;  //看门狗溢出中断只能通过禁止VIC的方式返回
    VICVectAddr = 0x00;        //通知VIC中断结束
}

/*********************************************************************************************************
** 函数名称：	Main（）
** 函数功能：	错误喂狗产生WDT中断演示。
********************************************************************************************************/
void Main(void)
{
    uint32 i;
    TargetInit(VPBDIV_DATA, PLLCFG_DATA, MAMTIM_DATA);      // don't delete
    while((PLLSTAT & (1 << 10)) == 0);                      // can delete
    
    PINSEL1 = 0x00000000;
    IO0DIR = BEEP;
    IO0SET = BEEP;
    
    WatchDogInit(60000,0);                         //初始化看门狗，定时时间：tpclk×4×60000，禁止复位功能
    
    SetISR(INT_WDT, 0,(unsigned int)WDT_ISR);      //设置看门狗中断服务函数
    IRQEnable(); 								   //打开中断
   
    for(i = 0; i < 0x3fff; i++);    
            
    WDFEED = 0xAA;
    WDFEED = 0x54;	     //错误的喂狗序列，将导致看门狗中断
            
    while(1);   
    
}


/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/