单片机数字电压表程序 -

标题: 单片机数字电压表程序 [打印本页]

作者: xiaolouluo 时间: 2019-12-11 10:57
标题: 单片机数字电压表程序
本帖最后由 xiaolouluo 于 2019-12-18 09:48 编辑

#include<reg52.h>
#define LCD_DB  P2
sbit LCD_RS = P1^0;
sbit LCD_RW = P1^1;
sbit LCD_EN = P1^2;
sbit AD_OE=P3^1;
sbit AD_EOC=P3^2;
sbit AD_A=P3^4;
sbit AD_B=P3^5;
sbit AD_C=P3^6;
sbit AD_START=P3^0;
unsigned char sj,ai;
int AD_sj=0,AD_ai=0;

unsigned char Zh1[]="voltmeter";
unsigned char Zh2[]="voltage:       ";

void Busy()                //检忙
{
unsigned char sta;
LCD_DB = 0xff;
LCD_RS = 0;
LCD_RW = 1;
do
{
LCD_EN = 1;
sta = LCD_DB;
LCD_EN = 0;
}
while(sta&0x80);
}

void Lcd_Write_Cmd(unsigned char cmd)    //命令
{
Busy();
LCD_RS = 0;
LCD_RW = 0;
LCD_DB = cmd;
LCD_EN = 1;
LCD_EN = 0;
}

void Lcd_Write_Data(unsigned char dat)    //数据
{
Busy();
LCD_RS = 1;
LCD_RW = 0;
LCD_DB = dat;
LCD_EN = 1;
LCD_EN = 0;
}
void InitLcd()                         //初始化
{
Lcd_Write_Cmd(0x38);
Lcd_Write_Cmd(0x08);
Lcd_Write_Cmd(0x01);
Lcd_Write_Cmd(0x06);
Lcd_Write_Cmd(0x0c);
}
void LcdSetCursor(unsigned char x,unsigned char y) //坐标
{
unsigned char addr;
if(y == 0)
      addr = 0x00 + x;
else
      addr = 0x40 + x;

Lcd_Write_Cmd(addr|0X80);
}

void LcdShowStr(unsigned char x,unsigned char y,unsigned char *s)  //字符串
{
LcdSetCursor(x,y);
while(*s)
{
      Lcd_Write_Data(*s);
      s++;
}
}

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