LCD1602+ADC0809制造的数字电压表

//********************************

//LCD1602+ADC0809制造的数字电压表

//接口方法：总线扩展

//作者：曾宪阳

//网址：http://hi.baidu.com/zxymcu

//********************************

#include

#defineADC0809Addr0x78ff

#defineLCDWriteComAddr0xa7ff

#defineLCDWriteDatAddr0xafff

#defineucharunsignedchar

#defineuintunsignedint

ucharDisp[6];

voiddelay_ms(uintt)

{

ucharx,y;

for(t;t>0;t–)

{

for(x=0;x<114;x++)

for(y=0;y<1;y++);

}

}

voidInit1602(void)

{

delay_ms(15);

*((ucharxdata*)LCDWriteComAddr)=0x38;

delay_ms(5);

*((ucharxdata*)LCDWriteComAddr)=0x38;

delay_ms(5);

*((ucharxdata*)LCDWriteComAddr)=0x38;

delay_ms(2);

*((ucharxdata*)LCDWriteComAddr)=0x08;

delay_ms(2);

*((ucharxdata*)LCDWriteComAddr)=0x01;

delay_ms(2);

*((ucharxdata*)LCDWriteComAddr)=0x0c;

delay_ms(2);

*((ucharxdata*)LCDWriteComAddr)=0x06;

delay_ms(2);

*((ucharxdata*)LCDWriteComAddr)=0x80;

delay_ms(2);

}

voidDisplay(void)

{

*((ucharxdata*)LCDWriteComAddr)=0XC0;

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=I;

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=N;

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=0;

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)==;

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(0+Disp[0]);

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(.);

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(0+Disp[1]);

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(0+Disp[2]);

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(0+Disp[3]);

delay_ms(2);

*((ucharxdata*)LCDWriteDatAddr)=(V);

delay_ms(2);

}

voidADC0809(void)

{

unsignedlongi;

*((ucharxdata*)ADC0809Addr)=0;

delay_ms(100);

i=*((ucharxdata*)ADC0809Addr);

P1=i;

i=(i*5000/255);

Disp[0]=(i/1000);

Disp[1]=(i00/100);

Disp[2]=(i000/10);

Disp[3]=(i000);

}

voidmain(void)

{

Init1602();

while(1)

{

ADC0809();

Display();

}

}