基于51单片机的数控电源

#include<reg52.h> #define uchar unsigned char #define uint unsigned int sbit key1=P1^0; //端口定义 sbit key2=P1^1; sbit key3=P1^2; sbit key4=P1^3; sbit rs=P1^4; sbit en=P1^5; sbit w1=P1^6; sbit w2=P1^7; sbit DAC_CS=P3^2; sbit DAC_WR=P3^6; uchar code table1[]=" Jinchaoqiang"; uchar code table2[]=" voltage:0.0V "; uchar ge,shifen,keynum,volt; void delay(uint z) //延时函数 { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void write_com(uchar com) //写指令到1602 { rs=0; en=0; P0=com; delay(5); w1=1; en=1; delay(5); en=0; } void write_date(uchar date) //写数据到1602 { rs=1; en=0; P0=date; delay(5); w1=1; en=1; delay(5); en=0; } void Init() //初始化 { uchar num; en=0; write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01); write_com(0x80); for(num=0;num<16;num++) { write_date(table1[num]); delay(50); } write_com(0x80+0x40); for(num=0;num<14;num++) { write_date(table2[num]); delay(50); } } void write_voltage(uchar add,uchar dat) //写电压到1602 { write_com(0x80+0x40+add); write_date(0x30+dat); } void da0832out(uchar dadata) //写电压数据到DAC0832 { w1=0; w2=1; DAC_CS=0; P0=dadata; DAC_WR=0; delay(5); DAC_WR=1; DAC_CS=1; w2=0; } void keyscan() //键盘扫描 { if(key1==0) { delay(5); if(key1==0) { keynum++; while(!key1); if(keynum==1) { write_com(0x80+0x40+12); write_com(0x0f); } } if(keynum==2) { write_com(0x80+0x40+10); write_com(0x0f); } if(keynum==3) { keynum=0; write_com(0x0c); } } if(keynum!=0) { if(key2==0) { delay(5); if(key2==0) { while(!key2); if(keynum==1) { shifen++; if(shifen==10)shifen=0; write_com(0x80+0x40+11); write_com(0x0c); write_voltage(12,shifen); } if(keynum==2) { ge++; if(ge==10)ge=0; write_com(0x80+0x40+9); write_com(0x0c); write_voltage(10,ge); } } } if(key3==0) { delay(5); if(key3==0) { while(!key3); if(keynum==1) { shifen--; if(shifen==-1)shifen=9; write_com(0x80+0x40+11); write_com(0x0c); write_voltage(12,shifen); } if(keynum==2) { ge--; if(ge==-1)ge=9; write_com(0x80+0x40+9); write_com(0x0c); write_voltage(10,ge); } } } if(key4==0) { delay(5); if(key4==0) { while(!key4); volt=10*ge+shifen; da0832out(volt); } } } } void main() //主函数 { w1=0; w2=0; Init(); ge=0; shifen=0; while(1) { keyscan(); } while(1); }