wdt_lib1.c.bak

easyARM8962 看门狗操作实验源码

/****************************************Copyright (c)****************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File Name: WDT.c
** Last modified Date: 2007-09-17
** Last Version: v1.0
** Description: 程序正常运行时，使得LED3不断地闪烁，并喂狗。当按键按下时，触发GPIO按键
**              中断，处理器进入死循环，看门狗定时器产生第一个超时信号，进入看门狗中断
**		服务程序，LED4不断闪烁，直到看门狗定时器产生第二次超时信号，导致系统复
**		位，系统再次正常运行，LED4不断地闪烁。使用Stellaris库函数。
** 
**--------------------------------------------------------------------------------------------------------
** Created By: 	 shaoxuefeng	
** Created date: 2007-09-17
** Version: 	 v1.0
** Descriptions:
**
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
*********************************************************************************************************/
/*********************************************************************************************************
系统头文件配置
*********************************************************************************************************/
#include "hw_memmap.h"													
#include "hw_types.h"
#include "hw_ints.h"
#include "src/gpio.h"
#include "src/interrupt.h"
#include "src/sysctl.h"
#include "src/systick.h"
#include "src/watchdog.h"

#define KEY1 GPIO_PIN_7													/*  定义KEY1					*/
#define LED1 GPIO_PIN_4													/*  定义LED3					*/
#define LED2 GPIO_PIN_5													/*  定义LED4					*/

/*********************************************************************************************************
** Function name:          GPIO_PORT_E_ISR
**
** Descriptions:           使程序进入死循环
**
** input parameters:       NONE
** output parameters:      NONE
**                          
** Returned value:         NONE
**
** Created by:             shaoxuefeng
** Created Date:           2007-09-07
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void GPIO_Port_E_ISR(void)			
{
	while(1);
}

/*********************************************************************************************************
** Function name:          delay
**
** Descriptions:           延时的多少取决于d的大小
**
** input parameters:       unsigned long d
** output parameters:      NONE
**                          
** Returned value:         NONE
**
** Created by:             shaoxuefeng
** Created Date:           2007-09-07
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/

void delay(unsigned long d)				                         /*  延时数量为 d 个指令周期		*/              
{
    for(;d;d--);
}
/*********************************************************************************************************
** Function name:          Watchdog_Timer_ISR
**
** Descriptions:           反转LED4
**
** input parameters:       NONE
** output parameters:      NONE
**                          
** Returned value:         NONE
**
** Created by:             shaoxuefeng
** Created Date:           2007-09-07
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/


void Watchdog_Timer_ISR(void)
{
	while(1){	
		GPIOPinWrite(GPIO_PORTC_BASE,LED2,~GPIOPinRead(GPIO_PORTC_BASE,LED2)) ;
																		/*  反转LED4					*/
		delay(100000);
		 	 }
}

/*********************************************************************************************************
** Function name:          main
**
** Descriptions:           程序主函数
**
** input parameters:       NONE
** output parameters:      NONE
**                          
** Returned value:         NONE
**
** Created by:             shaoxuefeng
** Created Date:           2007-09-07
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/

int main(void)

	SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG); 		                        /*	使能看门狗定时器			*/
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); 					/*	使能GPIO B口				*/
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC); 					/*	使能GPIO C口				*/
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); 					/*	使能GPIO E口				*/
  								
	GPIOPadConfigSet(GPIO_PORTE_BASE, KEY1, GPIO_STRENGTH_2MA,				
                     GPIO_PIN_TYPE_STD_WPU);
	GPIODirModeSet(GPIO_PORTD_BASE, KEY1, GPIO_DIR_MODE_IN);			/*	设置连接KEY1的PE2为输入		*/
  
	GPIOPadConfigSet(GPIO_PORTD_BASE, LED1, GPIO_STRENGTH_2MA,
                     GPIO_PIN_TYPE_STD_WPU);
	GPIODirModeSet(GPIO_PORTB_BASE, LED1, GPIO_DIR_MODE_OUT);			/*	设置连接LED3的PB6为输出		*/			
		
  	GPIOPadConfigSet(GPIO_PORTC_BASE, LED2, GPIO_STRENGTH_2MA,
                     GPIO_PIN_TYPE_STD_WPU);
  	GPIODirModeSet(GPIO_PORTC_BASE, LED2, GPIO_DIR_MODE_OUT);			/*	设置连接LED4的PC5为输出		*/
  
  	IntPrioritySet(INT_WATCHDOG,0x00);
  	IntPrioritySet(INT_GPIOD,0x40);
 	GPIOIntTypeSet(GPIO_PORTD_BASE, KEY1, GPIO_FALLING_EDGE);			/*	设置KEY1中断的触发方式为下降沿
 																									触发*/  
  	GPIOPinIntEnable(GPIO_PORTD_BASE, KEY1); 			 		/*	使能KEY1中断				*/
 
 	IntEnable(INT_GPIOD);												/*	使能GPIO E 口中断			*/
  
  	IntEnable(INT_WATCHDOG);											/*	使能看门狗中断				*/


  	WatchdogReloadSet(WATCHDOG_BASE, 6000000); 					/*	设置看门狗定时器的重载值	*/
  	WatchdogResetEnable(WATCHDOG_BASE); 	 					/*	使能看门狗定时器的复位功能	*/
  	WatchdogEnable(WATCHDOG_BASE); 							/*	使能看门狗定时器的中断		*/
  	WatchdogLock(WATCHDOG_BASE); 							/*	使能看门狗定时器的锁定机制	*/

  	while (1){
    		GPIOPinWrite(GPIO_PORTD_BASE, LED1, ~GPIOPinRead(GPIO_PORTD_BASE, LED1));
    																	/*	反转LED3					*/

    		delay(100000); 												/*	延时						*/
    		
    		WatchdogIntClear(WATCHDOG_BASE);					/*	清除看门狗的中断标志、"喂狗"*/
  			 }

}

/*********************************************************************************************************
  END FILE
*********************************************************************************************************/