训练项目十一：led及拨码开关的综合实验.c

长沙理工自己的实验程序

/*******************************************Copyright(c)*******************************************
**                           ChangSha University of Science & Technology                   
**
**                                     http://www.csust.com                                       
**
**-------File Info---------------------------------------------------------------------------------
** File Name:                        LED及拨码开关的综合试实验
** Latest modified Date:             2008.7.26
** Latest Version:
** Description:                      通过控制方向寄存器来控制输出电平的高低，进而实现交互闪烁灯              
**                            
**-------------------------------------------------------------------------------------------------
** Created By:
** Created date:
** Version:
** Descriptions:
**
**-------------------------------------------------------------------------------------------------
** Modified by:                      congdongliang
** Modified date:                    2008.7.26
** Version:
** Description:                      根据《代码规范》修改了部分变量命名及程序格式，使程序更规范
**                            
**************************************************************************************************/             

#include "iom128v.h"

/**************************************************************************************************
** Function name:                    Delay
** Description:                      延时程序
** input parameters:         
** output parameters:         
** Returned value:            
** Created by:
** Created Date:
**-------------------------------------------------------------------------------------------------
** Modified by:                      congdongliang
** Modified date:                    2008.7.26
**-------------------------------------------------------------------------------------------------
**************************************************************************************************/

void Delay (unsigned int  uitime)
{                    
    unsigned int uidelay_time;
	     
    for(uidelay_time=0; uidelay_time<uitime; uidelay_time++);
       
}

/**************************************************************************************************
** Function name:                    main
** Description:                      通过控制寄存器来控制PA口输出电平的高低，来实现两个LED灯的交互
**                                   闪烁                    
** input parameters:                 
** output parameters:               
**
** Returned value:
** Created by:
** Created Date:
**-------------------------------------------------------------------------------------------------
** Modified by:                      congdongliang
** Modified date:                    2008.7.26
**-------------------------------------------------------------------------------------------------
**************************************************************************************************/
void main ()
{
    DDRA = 0xFF;              
    PORTA= 0xFF;  
    DDRB = 0x00;
    PORTB= 0xFF;                     /* 定义PA口、PB口的数据方向寄存器，以及对其数据寄存器初始化 */
	 
    for(;;){
        if((PINB & 0x01) == 0) {
	        PORTA = 0xFD;            /* 判断PB0的状态，若为0，则执行LED交互闪烁                  */
	    
            Delay(6000);
	        Delay(6000);         
            Delay(6000); 
            Delay(6000); 
	        Delay(6000);          
            Delay(6000); 
            Delay(6000); 
            Delay(6000);         
            Delay(6000);
	   
            PORTA = 0xFB;
	             
            Delay(6000); 
	        Delay(6000);         
            Delay(6000); 
            Delay(6000); 
	        Delay(6000);          
            Delay(6000);
            Delay(6000); 
	        Delay(6000);         
            Delay(6000);
        }else{ 
                       
            PORTA = 0xFF;            /* PB0为1时，PA口输出全为1，LED全部不亮                     */         
        }
	}
}
/**************************************************************************************************
  END FILE
**************************************************************************************************/