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用51单片机实现的ADC0809数字电压表的PROTEUS仿真图:
本实例为AD转换,运用AD芯片将电压模拟量转换成数字量,然后显示在数码管上。
ADC0809数字电压表51单片机程序:
- #include<reg52.h>
- #include"common.h"
- #include"delay.h"
- uint8 smg_du[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
- sbit oe = P1^0; //输出使能
- sbit eoc = P1^1; //结束转换
- sbit st = P1^2; //开始信号
- sbit clk = P1^3; //时钟信号
- void smg_display(uint8 dat)
- {
- uint8 i;
- dat = (uint16)dat * 50 / 255;
- for(i=0;i<3;i++)
- {
- P0 = 0x00;
- switch(i)
- {
- case 0:
- P0 = smg_du[dat%10];
- P2 = 0xf7;
- break;
- case 1:
- P0 = smg_du[dat/10%10] + 0x80;
- P2 = 0xfb;
- break;
- case 2:
- P0 = smg_du[dat/100];
- P2 = 0xfd;
- break;
- }
- delay1ms(5);
- }
- }
- void main()
- {
- TMOD = 0x02; //定时器中断方式2 自动重装8位定时器
- TH0 = 0; //定时256us
- TL0 = 0;
- EA = 1;
- ET0 = 1;
- TR0 = 1;
- P1 = 0x3f; //通道3
- while(1)
- {
- st = 0;
- st = 1;
- st = 0; //开始转换标志
- while(!eoc ); //等待转换完成
- oe = 1;
- smg_display(P3);
- oe = 0;
- }
- }
- void timer0() interrupt 1
- {
- clk = ~clk;
- }
复制代码
ADC0809数字电压表全部资料下载:
19 ADC0809模数转换与显示电压.rar
(48.42 KB, 下载次数: 168)
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