AVR单片机课程设计程序

//AVR单片机课程设计程序
//名称：电压表
//硬件：AVR-ATMEGA16 实验板  8MHz 晶振
//编写人：李春起
//修改日志：
 

#include  
#include 

//-------------位拉高宏--------------------------------------------
#define ADC0_H PORTA|=BIT(PA0) 
#define ADC1_H PORTA|=BIT(PA1)   
#define LEDLK_H PORTA|=BIT(PA2)  //流水灯选通
#define SEGLK_H PORTA|=BIT(PA3)  //数码管段码选通
#define BITLK_H PORTA|=BIT(PA4)  //数码管位选通
//#define 18B20_H PORTA|=BIT(PA5) 
#define BEEP_H PORTA|=BIT(PA6)   //蜂鸣器
#define CUSB_H PORTA|=BIT(PA7) 
//-------------位拉低宏--------------------------------------------
#define ADC0_L PORTA&=~BIT(PA0)  
#define ADC1_L PORTA&=~BIT(PA1)    
#define LEDLK_L PORTA&=~BIT(PA2)   
#define SEGLK_L PORTA&=~BIT(PA3)   
#define BITLK_L PORTA&=~BIT(PA4)   
//#define 18B20_L PORTA&=~BIT(PA5)  
#define BEEP_L PORTA&=~BIT(PA6)  
#define CUSB_L PORTA&=~BIT(PA7)  
//----------单独按键宏定义--------------------------------
#define S1 (PIND&0X01)==0 
#define S2 (PIND&0X02)==0
#define S3 (PIND&0X04)==0
#define S4 (PIND&0X08)==0

#define NOP() asm("nop")

#define uchar unsigned char 
#define uint unsigned int
//============全局变量======================================
uint adc0,flag,voldata;//AD转换结果
//===================数据表==============================================
__flash uchar SEG[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0xff};
//===============mS延时子程序============================================
void delayms(uint m)
{
  uint i,j;
  for(i=0;i