2019年11月16日 | 0802LCD 4位显示程序 PIC单片机C语言程序

#include

#include

//#include"head.h"

#define uchar unsigned char 

#define uint unsigned int 

#pragma config FOSC = XT        // Oscillator Selection bits (XT oscillator)

#pragma config WDTE = OFF       // Watchdog Timer Enable bit (WDT disabled)

#pragma config PWRTE = ON       // Power-up Timer Enable bit (PWRT enabled)

#pragma config BOREN = OFF      // Brown-out Reset Enable bit (BOR disabled)

#pragma config LVP = ON        // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming)

#pragma config CPD = OFF        // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off)

#pragma config WRT = OFF        // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control)

#pragma config CP = OFF         // Flash Program Memory Code Protection bit (Code protection off)

//char tab[]="0123456789";

#define uchar unsigned char 

#define uint unsigned int 

void LCD_write_cmd(uchar command);

void LCD_write_command(uchar command);

void LCD_en_write(void);

void LCD_set_xy( unsigned char x, unsigned char y );

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);

void LCD_write_data(unsigned char data);

void delay_nus(unsigned int n);

void delay_nms(unsigned int n);   

#define RS RC2

#define EN RC3

#define DB7 RC7

#define DB6 RC6

#define DB5 RC5

#define DB4 RC4

#define LCD_DATA_PORT PORTC

#define LCD_DATA_TRIS TRISC

    /*------------------------------------------------------------------------------ 

    函数说明 

    ------------------------------------------------------------------------------*/ 

void LCD_init()

{

    TRISD=0x00; //数据口方向为输出 

    PORTD=0x00;

    TRISC=0x00; //数据口方向为输出 

    PORTC=0x00;//设置EN、RS/数据为输出 

    LCD_write_cmd(0x30);//4位的指令 

    delay_nms(5); 

    LCD_write_cmd(0x30); 

    delay_nus(200);  

    LCD_write_cmd(0x30); 

    delay_nms(1); 

    LCD_write_cmd(0x20);

    LCD_write_cmd(0x20); //4位显示

    LCD_write_cmd(0x80); 

    LCD_write_cmd(0x00); //显示开 游标、闪烁不显示

    LCD_write_cmd(0x80); 

    LCD_write_cmd(0x00); //清屏

    LCD_write_cmd(0x01); 

    LCD_write_cmd(0x00); //两行 5*7

    LCD_write_cmd(0xc0); 

}

void LCD_write_cmd(uchar command) //写指令 

{ 

    delay_nus(10); 

    RS=0;

    EN=0;//使能清零 

    LCD_DATA_PORT&=0x0f; //清除端口

    delay_nus(2);

    EN=1;

    LCD_DATA_PORT |= (command & 0xf0);//高4位不用改

    delay_nus(2);

    EN=0;

}

void LCD_write_command(uchar command) //写指令 

{ 

    LCD_write_cmd(command);

    LCD_write_cmd(command<<4);

}

void LCD_write_data(unsigned char data) //写数据 

{ 

    delay_nus(10); 

    RS=1;

    EN=0;//使能清零

    LCD_DATA_PORT&=0x0f;

    EN=1;

    LCD_DATA_PORT |= (data & 0xf0);//高4位不用改

    delay_nus(2);

    EN=0;

    delay_nus(2);

    LCD_DATA_PORT&=0x0F; //清低四位 

    EN=1;

    LCD_DATA_PORT |= ((data << 4) & 0xf0);//发送低4位

    delay_nus(2);

    EN=0;

  } 

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) //列x=0~15,行y=0,1

{ 

    LCD_set_xy( X, Y ); //写地址 

    while (*s) // 写显示字符 

    { 

        LCD_write_data( *s ); 

        s ++; 

    } 

} 

void LCD_set_xy( unsigned char x, unsigned char y )  //写地址函数 

{ 

    unsigned char address; 

    if (y == 0) address = 0x80 + x; 

    else        address = 0xc0 + x; 

    LCD_write_command( address); 

} 

void delay_nms(unsigned int n) //N ms延时函数 

{ 

    uint a,b;

    for(a=n;a>0;a--)

        for(b=80;b>0;b--);

} 

void delay_nus(unsigned int n) //N us延时函数 

{ 

    unsigned int i; 

    for (i=0;i}

void main()

{

     LCD_init();

//    LCD_write_command(0x0d); //光标开

     while(1)

     {

         RD0=1;

         delay_nms(1000);

         RD0=0;

         delay_nms(1000);

        LCD_write_string(0,0,"ceshiLCD");

        LCD_write_string(0,1,"hahahaha");

        delay_nms(2000);

     }

}