hoi ve hien thi LCD

[thinh0612]

minh moi tap tanh viet ve pic.Day la doan code minh viet bang CCS de hien thi nhiet do qua LCD(Cam bien nhiet do bang LM335) nhung ko hieu sao mo phong thi chay ok ma khi lap mach chay thu thi LCD khong chiu hien thi.Cac bac nao ranh ve cai nay giup minh voi.

#include "C:\Program Files\PICC\Devices\16F877A.h"
#include "C:\Program Files\PICC\Devices\def_877a.h"

#device *=16 ADC=10
#FUSES NOWDT, HS, NOPUT, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG

#use delay(clock=12000000)
long value,nhietdo;
int8 a,b,c,d,i;
void tachhang(int&a,int&b,int&c,int&d);
char so[11] ="0123456789";

#define RS RA3
#define RW RA2
#define E  RA1
#define BF RB7
#define LCD PORTB
char chu[9] ="nhietdo=";

#use  fast_io(b)
#define  tocdo0   0     //toc do bang 0
#define  td_macdinh  80 //toc do mac dinh
#define  tocdo1   207   //1/3 toc do cuc dai
#define  tocdo2   514   //2/3 toc do cuc dai
#define  tocdo3   620   //toc do cuc dai

int16 duty1=0;
int16 duty2=0;
int8  bientocdo=0;
int1  bienthuan=0;
int1  biennghich=0;

/*Ham yeu cau goi lenh dieu khien LCD*/
void comnwrt(void)
{
RS = 0;
RW = 0;
E = 1;
E = 0;
delay_ms(2);
}
/*Ham yeu cau goi du lieu hien thi len LCD*/
void datawrt(void)
{
RS = 1;
RW = 0;
E = 1;
E = 0;
delay_ms(2);
}

void main()
{   set_tris_A(0);
    set_tris_B(0);
    delay_ms(100);
    LCD = 0x30; 
    comnwrt();
while(true)
{ 
bit_set(portA,5);
setup_adc(adc_clock_internal);
setup_adc_ports(AN0);
set_adc_channel(0);
delay_ms(100);
value=read_adc();
nhietdo=(value-559)/2.024;
tachhang(a,b,c,d);

delay_ms(1);


LCD = 0x0C;
comnwrt();
LCD = 0x06;  
comnwrt();
LCD = 0x83;  
comnwrt();


delay_ms(10);
for (i=0;i<9;i++) 
{    lcd=chu[i];
     datawrt();
}

lcd=so[c];
datawrt();
lcd=so[d];
datawrt();
lcd ='o';
datawrt();
lcd ='C';
datawrt();

}
}

void tachhang(int&a,int&b,int&c,int&d)
{
a=nhietdo/1000;
b=(nhietdo%1000)/100;
c=(nhietdo%100)/10;
d=nhietdo%10;
}

phamminhtuan:Bạn cần cho code vào trong thẻ [code] và gõ Tiếng Việt, nếu vi phạm bài của bạn sẽ bị xóa