PIC_A/D converte

對一下寄存器控制

ADCON0

ADCON1

GODONE =1時相當于開始AD轉換，過一點時間會變?yōu)?，表示AD轉換完成

ADRESH

ADRESL

#include

#include

__CONFIG(1,XT) ; //晶振為外部4M

__CONFIG(2,WDTDIS) ; //看門狗關閉

__CONFIG(4,LVPDIS) ; //禁止低電壓編程

#define uchar unsigned char

#define uint unsigned int

#define nop NOP()

#define en RB3

#define rw RB4

#define rs RB5

void delayms(uint z)

{

uint i,j;

for(i=0;i<100;i++)

for(j=0;j

}

void write_com(uchar com)

{

rs=0;

rw=0;

delayms(5);

en=1;

delayms(5);

PORTD=com;

en=0;

delayms(5);

}

void write_dat(uchar dat)

{

rs=1;

rw=0;

delayms(5);

en=1;

delayms(5);

PORTD=dat;

en=0;

delayms(5);

}

void init_1602()

{

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

}

void main()

{

uchar temp;

ADCON0=0x21;

ADCON1=0x00;

TRISA=0xff;

TRISB=0xc7;

TRISD=0x00;

init_1602();

while(1)

{

GODONE=1;

while(GODONE);

temp=ADRESH;

write_com(0x80);

write_dat(0x30+temp/1000);

write_dat(0x30+(temp-1000*(temp/1000))/100);

write_dat(0x30+(temp-1000*(temp/1000)-100*((temp-1000*(temp/1000))/100))/10);

write_dat(0x30+temp);

}

}