ADC0804电压显示

#include<reg51.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit ds=P2^0;//CH595串行数据输入端 sbit ST_CP=P2^1;//CH595锁存器时钟 sbit SH_CP=P2^2;//CH595移位寄存器时钟 sbit rs=P2^3;//LCD1602数据命令端，"H"表示数据，"L"表示命令 sbit lcden=P2^4;//LCD1602使能控制端 sbit ad_cs=P2^7; sbit adwr=P3^6;//AD的WR端口 sbit adrd=P3^7;//AD的RD端口 uchar table[]=" Voltage: . V"; uchar table1[]=" f: Hz"; void delayms(uint k)//延时k ms { uint i,j; for(i=k;i>0;i--) for(j=110;j>0;j--); } void write_com(uchar com)//LCD写命令 { uchar i,temp; rs=1; ST_CP=0; temp=com; for(i=0;i<8;i++) { SH_CP=0; delayms(1); ds=(bit)(temp&0x80); temp=temp<<1; SH_CP=1; } ST_CP=1; delayms(1); lcden=0; delayms(1); lcden=1; } void write_data(uchar date)//LCD写数据 { uchar i,temp; rs=0; ST_CP=0; temp=date; for(i=0;i<8;i++) { SH_CP=0; delayms(1); ds=(bit)(temp&0x80); temp=temp<<1; SH_CP=1; } ST_CP=1; delayms(1); lcden=0; delayms(1); lcden=1; } void lcd_init()//LCD初始化 { uchar num; lcden=1;//1602液晶初始化 write_com(0x38);//16*2显示，5*7点阵，8位数据接口 write_com(0x0c);//设置开显示，不显示光标 write_com(0x06);//写一个字符后地址指针加一 write_com(0x01);//显示清0，数据指针清0 write_com(0x80); for(num=0;num<16;num++) { write_data(table[num]); _nop_(); //delayms(1); } write_com(0x80+0x40); for(num=0;num<16;num++) { write_data(table1[num]); _nop_(); //delayms(1); } } void lcd_voltage_display(uchar addr,uchar date) { write_com(0x80+addr); write_data(0x30+date); } void ad_display(uchar addr,uchar date) { write_com(0x80+0x40+addr); write_data(0x30+date); } void main() { uchar a,ad_data,a1,a2,a3,A1,A2,A3,A4; lcd_init(); while(1) { P0=0xff; ad_cs=0; _nop_(); adwr=0;//启动AD转换 _nop_(); _nop_(); _nop_(); adwr=1; _nop_(); adrd=1; _nop_(); adrd=0; _nop_(); _nop_(); for(a=10;a>0;a--) { lcd_voltage_display(10,A1); lcd_voltage_display(12,A2); lcd_voltage_display(13,A3); lcd_voltage_display(14,A4); ad_display(1,a1); ad_display(2,a2); ad_display(3,a3); } ad_data=P0; adrd=1; _nop_(); A1=ad_data/51; A2=ad_data%51*10/51; A3=ad_data%51*10%51*10/51; A4=ad_data%51*10%51*10%51*10/51; a1=ad_data/100; a2=ad_data%100/10; a3=ad_data%100%10; } }