直流负载恒流源.docx

/=/ - ADC0804 测试电压 -/ / / - /niejinbo -/-/*头文件区*#include#include#include#include /自定义头文件#include /LCD1602头文件#include /ADC0804头文件/=#define uchar unsigned char#define uint unsigned int/sbit DAC0832_SC=P14;sbit DAC0832_WR=P31;sbit k1=P32;sbit k2=P33;sbit k3=P30;void delay(uint z);/-void main()uchar Data;long uint mm,qq,mn;/uint qq,mm,mv,mn;P1=0;lcd_init(); /LCD初始化qq=0;while(1)if(k1=0&Data0) delay(200); if(k2=0) Data-;P1=Data; DAC0832_WR=0;/delay(100);/ DAC0832_WR=1; if(k3=0) delay(400); if(k3=0) qq=qq+100; else qq=qq-100; tab_vv4=qq%10; tab_vv3=qq%10; tab_vv2=(qq%1000)/100; tab_vv1=(qq%10000)/1000; tab_vv0=qq/10000; read_dat=adc0804(); / 5/256=0.0195voltage=(read_dat*(5*100/256);tab_v0=(voltage*10)/10000; tab_v1=voltage*10%10000/1000; tab_v2=(voltage*10)%1000)/100; tab_v3=(voltage*10)%100)/10; tab_v4=voltage%10; mn=(tab_v0*10000+tab_v1*1000+tab_v2*100+tab_v3*10+tab_v4); mm=(qq-mn)*1000)/qq; tab_vb0=mm/100; tab_vb1=(mm%100)/10; tab_vb2=mm%10; lcd_dis(); /LCD显示 /-fu zhi xian shivoid lcd_dis()uchar i,n;write_com(0x80);/-for(i=0;i3;i+) /显示： write_data(tab_voi);/-write_com(0x83); /显示电压值for(i=0;i5;i+) n=tab_vi; write_data(tab_numn);write_com(0x88);/-for(i=8;i11;i+) /显示： write_data(tab_voi);/-write_com(0x80+0x40);for(i=0;i3;i+) / write_data(tab_twoi); /-write_com(0x80+0x43); /显示电压值for(i=0;i5;i+) n=tab_vvi; write_data(tab_numn); /-write_com(0x80+0x48);/=for(i=8;i10;i+) /显示： write_data(tab_twoi);/- ooooootiao zheng lv write_com(0x80+0x4a); write_data(tab_num10);/- write_com(0x80+0x4b); /显示电压值for(i=0;i0;i-) for(j=50;j0;j-);/=/- ADC0804.H文件内容 -/=/-文件名：adc0804.h -/=/-定义一下，方便使用-#define uchar unsigned char#define uint unsigned int#define AD_PORT P2 /ADC0804数据端口/-/- 定义端口 - /片选sbit wr=P36; /sbit rd=P37;/-/ -函数声明- void delay(uint);uchar adc0804();/-uchar adc0804() /AD转换函数uchar ad_value;AD_PORT=0xff; /片选信号拉低wr=1; /开始转换wr=0;wr=1;delay(100); / 等待转换完成，时间须足够长rd=0; /读信号有效ad_value=AD_PORT; /读取数据delay(