单片机用ADC0832进行数据采样，12864液晶显示

#include <reg52.h> #define uchar unsigned char #define uint unsigned int sbit ST = P3^4; //ADC0809的6引脚 sbit EOC = P3^5; //ADC0809的7引脚 sbit OE=P3^6; sbit RS=P1^0 ; sbit RW=P1^1 ; sbit E=P1^2 ; sbit RES=P1^3 ; #define Lcd_Bus P0 uchar buffer[] = {0,0,0,0}; uint voltage; //定义电压变量 uint AdResult; //定义A/D转换结果变量 uint Temp; //定义二进制-十进制转换的中间变量 float xianshi; uchar dianya[3]={'0','0','0'}; void delay1(uint z) //延时子程序 { uint x,y; for(x = 0;x < z; x ++) for(y = 0;y < 120; y ++); } void send_str(unsigned char str[]) { unsigned char i = 0; while (str[i] != '\0') { SBUF = str[i++]; while (!TI) ; //等待数据传送完毕 TI = 0; //清中断标志 } } void chk_busy() { RS=0 ; RW=1 ; E=1 ; Lcd_Bus=0xff ; while((Lcd_Bus&0x80)==0x80); E=0 ; } /*------------------延时子程序-----------------------------*/ void delay(unsigned int t) { unsigned int i,j ; for(i=0;i<t;i++) for(j=0;j<10;j++); } /*------------------写命令到LCD------------------------------*/ void write_com(unsigned char cmdcode) { chk_busy(); RS=0 ; RW=0 ; E=1 ; Lcd_Bus=cmdcode ; delay(5); //------------------在数据写入的时候加入适当的延时 E=0 ; delay(5); } /*-------------------写数据到LCD----------------------------*/ void write_data(unsigned char Dispdata) { chk_busy(); RS=1 ; RW=0 ; E=1 ; Lcd_Bus=Dispdata ; delay(5); //------------------在数据写入的时候加入适当的延时 E=0 ; delay(5); } /*------------------初始化LCD屏--------------------------*/ void lcdreset() { delay(2000); write_com(0x30); delay(10); //选择基本指令集 write_com(0x30); //选择8bit数据流 delay(5); write_com(0x0c); //开显示(无游标、不反白) delay(10); write_com(0x01); //清除显示，并且设定地址指针为00H delay(500); write_com(0x06); //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位 delay(0); } /*------------------显示字符串--------------------------*/ void hzkdis(unsigned char code*s) { while(*s>0) { write_data(*s); s++; delay(50); } } void adc0809_convert() //A/D转换子程序 { ST = 0; ST = 1; ST = 0; //开始A/D转换 while(EOC == 0) ; //A/D转换完成 OE=1; AdResult = P2; //把A/D转换结果赋给A/D转换结果变量 OE=0; // send_str(AdResult); dianya[2]=AdResult/100; dianya[1]=AdResult%100/10; dianya[0]=AdResult%10; write_com(0x90); write_data(dianya[2]+'0'); write_data(dianya[1]+'0'); write_data(dianya[0]+'0'); xianshi=((float)AdResult/255)*4.6; write_com(0x98); xianshi=xianshi*100; write_data((int)xianshi/100+'0'); hzkdis("."); write_data((int)xianshi%100/10+'0'); write_data((int)xianshi%10+'0'); } void main() { P0 = 0xff; P1 = 0xff; P2 = 0xff; P3 = 0xff; lcdreset(); SCON = 0x50; //设定串口工作方式1，接收使能 PCON = 0x00; //波特率不倍增 TMOD = 0x20; //定时器1工作于8位自动重载模式, 用于产生波特率 EA = 1; TL1 = 0xfd; TH1 = 0xfd; //波特率9600 TR1 = 1; hzkdis("ADC0809"); while(1) { adc0809_convert(); send_str("111"); delay1(255); send_str(dianya); delay1(255); } }