help me!!!!! LCD TC1602A

[alasca]

Địa chỉ mail của em diachiwebhoc@gmail.com

[canhhung]

#include <REGX51.H>
#include<string.h>
sfr LCD_data=0xa0;
sbit BF=0xa7;
sbit RS=P3^5;
sbit Rw=P3^4;
sbit En=P3^3;
void wait(void)
{
long n=0;
En=1;
RS=0;
Rw=1;
LCD_data=0Xff;
while(BF){n++;if(n>100) break;}
En=0;
Rw=0;
}
//*ham dieu khien LCD thuc hien 1 lenh*//
void LCD_control(unsigned char x)
{
En=1;
RS=0;
Rw=0;
LCD_data=x;
En=0;
wait();
}
//*ham khoi tao

void LCDinit(void)
{
LCD_control(0x30);//che do 8 bit
LCD_control(0X38);//2 dong va ma tran 5X7
LCD_control(0x0C);//bat contro
LCD_control(0x06);//tang con troi dich con tro sang phai
LCD_control(0x01);//xoa man hinh
}
//============
void LCD_write(unsigned char c)
{
En=1;
RS=1;
Rw=0;
LCD_data=c;
En=0;
wait();
}
//=========
void LCD_puts(unsigned char *s,unsigned char row)
{
unsigned char len;
if(row==1) LCD_control(0x80) ;
else LCD_control(0xc0);
len=strlen(s);
While(len!=0)
{
LCD_write(*s);
s++;
len--;

}
}
//=================
void delay(long time)
(
long n;
for(n=0;n<time;n++)
{
;
};
)
//=============
void main(void)
{
char x;
LCDinit();
LCD_puts("8052mcu",1);
delay*(30000);
While(1==1)
{
for(x=0;x<15;x++)
{
LCD_puts("8052mcu",1);
LCD_control(0X18) ;
delay(5000)
}
}
}
anh em giúp tôi với tại sao chương trình thế này mà không chạy được hic hic .Minh dùng trình dịch KEILC nó cứ báo lỗi mãi .Giúp mình với hic hic

[PSman]

Giao tiếp LCD 16x2 dùng Keil-C đã có sẵn file .h này rồi. Đơn giản và dễ hiểu. Bác cứ lấy dùng, đừng cố gắng tạo nữa chỉ mất công mà chạy không ổn định.

Các hàm em bôi xanh là các hàm bác cần quan tâm. Còn lại là gì thì kệ xác nó. Hì hì. Chắc chắn chạy !

/************************************************** **************************/
// define Hardware address
/************************************************** ***************************/
#define LCD_PORT P1 //<-- cái này tùy bác
sbit LCD_RS = LCD_PORT^0;
sbit LCD_RW = LCD_PORT^1;
sbit LCD_EN = LCD_PORT^2;
sbit LCD_BG = LCD_PORT^3; //cái này em chọn để tắt mở background led bằng 89 luôn.

#define ReadCommand {LCD_RS = 0; LCD_RW = 1;}
#define WriteCommand {LCD_RS = 0; LCD_RW = 0;}
#define WriteData {LCD_RS = 1; LCD_RW = 0;}
#define LatchData {LCD_EN = 1; LCD_EN = 0;}

/************************************************** **************************
define LCD command
************************************************** ***************************/
#define LCD_CLEAR 0x01 // Clear display
#define LCD_HOME 0x02 // return cursor and LCD to home position
#define LCD_OFF 0x08 // turn off display and cursor
#define LCD_DISPLAY_ON 0x0C // turn on display and turn off cursor
#define LCD_CURSOR_ON 0x0A // turn on cursor and turn off display
#define LCD_BLINK_CURSOR 0x0E // turn on display and blink cursor
#define LCD_FONT_8BIT 0x38 // set interace length: 8bits, 2 lines, font 5x8
#define LCD_FONT_4BIT 0x28 // set interace length: 4bits, 2 lines, font 5x8
#define LCD_MOVE_CURSOR 0x06 // Entry mode set: set increments mode, not shift (cursor)
#define LCD_MDRIGHT 0x1C // Move display to the right
#define LCD_MDLEFT 0x18 // Move display to the left

//================================================== ============
void LCD_BgON(void)
{
LCD_BG = 0;
}
//================================================== ============
void LCD_BgOFF(void)
{
LCD_BG = 1;

}
//================================================== ===============
void WaitReady()
{
bit lcd_busy = 1;
ReadCommand;
LCD_PORT |= 0xF0; // set outputlatches to '1'
while(lcd_busy){
LCD_EN = 1; // read high nibble
lcd_busy = 1;
lcd_busy = LCD_PORT & 0x80; // return bit 7
LCD_EN = 0;
LCD_EN = 1; // read low nibble
LCD_EN = 0;
}
}

//================================================== ============================
void write_char(unsigned char c)
{
unsigned char temp;
temp = c & 0xF0; // Don't affect bits 0-3
LCD_PORT &= 0x0F; // Bits 4..7 <- 0
LCD_PORT |= temp; // High nibble to display
LatchData;

temp = (c << 4) & 0xF0; // Prepare to send low nibble
LCD_PORT &= 0x0F; // Bits 4..7 <- 0
LCD_PORT |= temp; // Low nibble to display
LatchData;
}

/************************************************** ***************************/
void LCD_Init_Write(unsigned char cmd)
{
WaitReady();
WriteCommand;
LCD_PORT = cmd;
LatchData;
}

/************************************************** **************************
LCD_PutCmd function
Write a control byte to LCD
Input : control byte
************************************************** ***************************/
void LCD_PutCmd(unsigned char cmd)
{
WaitReady(); // Wait for LCD ready
WriteCommand; // set LCD to send mode
write_char(cmd); // send command
}

/************************************************** **************************
LCD_PutChar function
Write a ASCII symbol to LCD
Input: ASCII symbol
************************************************** ***************************/
void LCD_PutChar(unsigned char ch)
{
WaitReady();
WriteData;
write_char(ch);
}

/************************************************** ***************************
LCD_PrString function
Write a string to LCD
Input: string
************************************************** ****************************/
void LCD_PutStr(char *str)
{
while(*str!='\0'){
LCD_PutChar(*str);
++str;
}
}

/************************************************** ***************************
LCD_Position function
Set the position of cursor on LCD
Input: row, column
************************************************** ****************************/
void LCD_Pos(unsigned char row, unsigned char col)
{
LCD_PutCmd( (1<<7)|(row<<6)|col );
}

/************************************************** ***************************
LCD_Clear function
Clear LCD
************************************************** ****************************/
void LCD_Clear()
{
LCD_PutCmd(LCD_CLEAR);
}

/************************************************** ***************************
LCD_Init function
Prepare for display content. Must be called at first
************************************************** ****************************/
void LCD_Init()
{

LCD_Init_Write(LCD_FONT_4BIT); // 0x28 set a 5x8 dot character font
LCD_PutCmd(LCD_FONT_4BIT); // and 4 bits data bus
LCD_PutCmd(LCD_OFF);
// LCD_Clear();
LCD_PutCmd(LCD_DISPLAY_ON); // 0x0C, Display on and cursor off
LCD_PutCmd(LCD_MOVE_CURSOR); // 0x06
// LCD_PutCmd(LCD_BLINK_CURSOR); // Blink cursor
}

/************************************************** **************************
LCD_PrInteger function
Display a integer decimal number to LCD
Input: a integer number
************************************************** ***************************/
void LCD_PutNum(int num)
{
int temp;
unsigned char i = 0, c[5];
temp = num;
if (temp != 0) {
if (temp < 0){
LCD_PutChar('-');
temp = - temp;
}
while(temp){
c[i++] = temp%10;
temp /= 10;
}
while(i) LCD_PutChar(c[--i] + '0');
}
else LCD_PutChar('0');
}

[DTCCOM]

muốn cho chữ chạy có cần xóa đi xóa lại màn hình không hả các bác
mà em thấy trong cái hàm LCD_PutNum() có lệnh:

while(i) LCD_PutChar(c[--i] + '0');

biến truyền vào hàm này là char cơ mà, lệnh trên vẫn dịch và chạy bình thường ,em vẫn chưa hiểu tại sao lại thê, tại sao lại phải thêm kí tự '0' vào cuối trước khi đưa lên LCD

[vuthanhtrong]

minh co so do nguyen ly cua mach dem san pham nay .xin cac su huynh gop y. su huynh nao co the lap trinh thi giup voi.