Tweet
mình đang làm BTL máy tính điện tử. mô phỏng thì chạy ngon lành cành đào. nhưng làm mạch thật có 2 lỗi với cái LCD.
1/ hiển thị chỉ được một dòng
2/ toàn hiển thì kí tự đặc biệt.
mình dùng chip 89S52, TA 12MHz. ai biết chỉ giáo với.
đây là code và mạch mô phỏng
mô phỏng: máy tính điện tử
1/ hiển thị chỉ được một dòng
2/ toàn hiển thì kí tự đặc biệt.
mình dùng chip 89S52, TA 12MHz. ai biết chỉ giáo với.
đây là code và mạch mô phỏng
Code:
#include <regx52.h> //khai bao thu vien
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#define RS P2_7 //dinh nghia cac chan
#define RW P2_6 //RW=0 => ghi
#define EN P2_5 //RW=1 => doc
//RS=0 => code
//RS=1 => data
#define LCD_PORT P0
sbit cot0=P1^2; // khai bao
sbit cot1=P1^4;
sbit cot2=P1^6;
sbit cot3=P1^7;
sbit hang0=P1^0;
sbit hang1=P1^1;
sbit hang2=P1^3;
sbit hang3=P1^5;
int sttphim;
unsigned char dau;
/***************************cac ham con delay************************/
void delay(unsigned int time) // Thoi gian time ms
{
TMOD = 0x01; // Timer 0 che do 1
while (time--)
{
TH0 = -1000/256;
TL0 = -1000%256;
TR0 = 1;
while (!TF0);
TR0 = 0;
TF0 = 0;
}
}
void delay_short() //ham tre 15ms
{
int i;
for(i=0;i<5;i++);
}
/***************************Cac hàm xu ly LCD************************/
void kt_ban() //ham ktra co ban LCD
{
unsigned char x;
LCD_PORT = 0xFF;
RS = 0;
RW = 1;
do
{
EN = 1;
delay(50);
EN = 0;
x=LCD_PORT;
x=x&0x80;
}
while(x!=0x80);
}
void LCDWriteCmd(unsigned char c)
{
kt_ban();
delay(50);
LCD_PORT = c;
RS = 0; // Chon thanh ghi lenh
RW = 0; // Chon che do ghi du lieu tu 8051 vao LCD
EN = 1;
delay_short();
EN = 0;
}
void LCDWriteData(unsigned char c)
{
kt_ban();
delay(50);
LCD_PORT = c;
RS = 1; // Chon che do doc du lieu tu 8051
RW = 0;
EN =1;
delay_short();
EN = 0;
}
void LCD_init(void)
{
LCDWriteCmd(0x38);
LCDWriteCmd(0x38);
LCDWriteCmd(0x38);
LCDWriteCmd(0x01); // Xoa man hinh
LCDWriteCmd(0x0f); // Co dich hien thi
}
void LCD_clear()
{
LCDWriteCmd(0x01);
}
void LCD_putstr(unsigned char *s)
{
while(*s)
{
LCDWriteData(*s);
s++;
}
}
void LCDwritei(long d)
{ unsigned int i,j;
unsigned char a[7];
a[6]=d%10;
d=d/10;
a[5]=d%10;
d=d/10;
a[4]=d%10;
d=d/10;
a[3]=d%10; // Chia lay phan du, duoc chu so hang don vi
d=d/10; // Chia lay phan nguyen, duoc nhung chu so da bo hang don vi
a[2]=d%10; // Duoc chu so hang chuc
d=d/10; // Nhung chu so da bo hang don vi va hang chuc
a[1]=d%10; // Duoc hang tram
d=d/10; // Duoc chu so da bo hang don vi, chuc, tram
a[0]=d%10; // Duoc hang ngan
for(i=0;i<7;i++)
{
if(a[i]!=0)
break;
}
for(j=i;j<7;j++)
{
LCDWriteData(48+a[j]);
}
}
/***************************Ham quet phim************************/
void quetphim()
{
int y;
P1=0xD4;
if((!cot0)|(!cot1)|(!cot2)|(!cot3))
{
for(y=0;y<5000;y++){
if(cot0==0) //neu la cot 0
{
hang0=1;
hang1=1;
hang2=1;
hang3=1;
cot0=0;
if(!hang0) {delay(1); while(hang0==0); sttphim=0;}
if(!hang1) {delay(1); while(hang1==0); sttphim=1;}
if(!hang2) {delay(1); while(hang2==0); sttphim=2;}
if(!hang3) {delay(1); while(hang3==0); sttphim=3;}
}
else if(cot1==0) //neu la hang 1
{
hang0=1;
hang1=1;
hang2=1;
hang3=1;
cot1=0;
if(!hang0) {delay(1); while(hang0==0); sttphim=4;}
if(!hang1) {delay(1); while(hang1==0); sttphim=5;}
if(!hang2) {delay(1); while(hang2==0); sttphim=6;}
if(!hang3) {delay(1); while(hang3==0); sttphim=7;}
}
if(cot2==0)
{
hang0=1;
hang1=1;
hang2=1;
hang3=1;
cot2=0;
if(!hang0) {delay(1); while(hang0==0); sttphim=8;}
if(!hang1) {delay(1); while(hang1==0); sttphim=9;}
if(!hang2) {delay(1); while(hang2==0); dau='+';}
if(!hang3) {delay(1); while(hang3==0); dau='-';}
}
if(cot3==0)
{
hang0=1;
hang1=1;
hang2=1;
hang3=1;
cot3=0;
if(!hang0) {delay(1); while(hang0==0); dau='*';}
if(!hang1) {delay(1); while(hang1==0); dau='/';}
if(!hang2) {delay(1); while(hang2==0); dau='C';}
if(!hang3) {delay(1); while(hang3==0); dau='=';}
}
}
}
}
/**************************chuong trinh chinh***********************/
void main(void)
{ long fnumber;
long lnumber;
long result,sodu,dev;
unsigned char sign;
unsigned char hienthi;
int i,kt,j;
kt=0;
i=0;
LCD_init();
LCDWriteCmd(0x01);
LCDWriteCmd(0x0C);
LCD_putstr("http://");
LCDWriteCmd(0xC0);
LCDWriteCmd(0x0C);
LCD_putstr("nhoclove1711");
delay(300);
while(1)
{
dau='w';
sttphim=10;
quetphim();
if(sttphim!=10)
{
if(kt==0){
if(i==0)
{LCD_clear();}
fnumber=fnumber*10+sttphim;
i=1;
}
else{
lnumber=lnumber*10+sttphim;
}
hienthi=sttphim+48;
LCDWriteData(hienthi);
}
else
{
switch(dau)
{
case 'C':
{
LCDWriteCmd(0x01);
break;
}
case '+':
{
if(i==0)
{LCD_clear();}
LCDWriteData(dau);
kt=1;
sign='+';
break;
}
case '-':
{
if(i==0)
{LCD_clear();}
LCDWriteData(dau);
kt=1;
sign='-';
break;
}
case '*':
{
if(i==0)
{LCD_clear();}
LCDWriteData(dau);
kt=1;
sign='*';
break;
}
case '/' :
{
if(i==0)
{LCD_clear();}
LCDWriteData(dau);
kt=1;
sign='/';
break;
}
case '=' :
{
if(i==0)
{LCD_clear();}
if(sign=='+')
{
LCDWriteData(dau);
result = fnumber+lnumber;
LCDWriteCmd(0xC0);
if(result>999999999){LCD_putstr("ERROR");}
else
{
LCDwritei(result);}
LCDWriteCmd(0x80);
kt=0;
fnumber=0;
lnumber=0;
i=0;
}
else if(sign=='-')
{
LCDWriteData(dau);
if(fnumber>lnumber)
{result = fnumber-lnumber;}
else{
LCDWriteData('-');
result = lnumber-fnumber;
}
LCDWriteCmd(0xC0);
if(result>999999999){LCD_putstr("ERROR");}
else
{
LCDwritei(result);}
LCDWriteCmd(0x80);
kt=0;
fnumber=0;
lnumber=0;
i=0;
}
else if(sign=='*')
{
LCDWriteData(dau);
result = fnumber*lnumber;
LCDWriteCmd(0xC0);
if(result>999999999){LCD_putstr("ERROR");}
else
{
LCDwritei(result);}
LCDWriteCmd(0x80);
kt=0;
fnumber=0;
lnumber=0;
i=0;
}
else if(sign=='/')
{
LCDWriteData(dau);
if(lnumber==0)
{
LCDWriteCmd(0xC0);
LCD_putstr("ERROR");
LCDWriteCmd(0x80);
}
else
{
result = fnumber/lnumber;
LCDWriteCmd(0xC0);
if(fnumber<lnumber)
{
LCD_putstr("0");
}
else
{
LCDwritei(result);
}
sodu = fnumber%lnumber;
}
if(sodu!=0)
{
LCDWriteData(',');
for(j=0;j<9;j++)
{
dev=(sodu*10)/lnumber;
LCDwritei(dev);
dev=(sodu*10)%lnumber;
sodu=dev;
}
LCDWriteCmd(0x80);
kt=0;
fnumber=0;
lnumber=0;
i=0;
}
else
{
kt=0;
fnumber=0;
lnumber=0;
i=0;
}
}
else
break;
}
default :
break;
}
}
}
}
Comment