PIC 16F877A- Mạch Giao tiếp LCD mode 8bit cơ bản

Mạch mô phỏng

chương trình trên CCS

// Program to display text on 16x2 LCD using PIC16f877a Microcontroller

#include <16F877A.h>
#use delay(clock=4000000)
//LCD Control pins
#define rs RE0
#define rw RE1
#define en RE2
//LCD Data pins
#define lcdport PORTB

void lcd_ini();
void lcdcmd(unsigned char);
void lcddata(unsigned char);
unsigned char data[20]="DPelec compa";
unsigned char data2[20]="ndphong";
unsigned int i=0;

void main(void)
{
   set_tris_b(0);
   set_tris_e(0);
   lcd_ini();      // LCD initialization
   while(data[i]!='\0')
   {
      lcddata(data[i]);   // Call lcddata function to send characters
               // one by one from "data" array
      i++;
      Delay_ms(300);
   }
      lcdcmd(0xc0);
      for(i=0;i<7;i++)
      {
      lcddata(data2[i]);
      
      }
      
   }


void lcd_ini()
{
   lcdcmd(0x38);      // Configure the LCD in 8-bit mode, 2 line and 5x7 font
   lcdcmd(0x0C);      // Display On and Cursor Off
   lcdcmd(0x01);      // Clear display screen
   lcdcmd(0x06);      // Increment cursor
   lcdcmd(0x80);      // Set cursor position to 1st line, 1st column
}

void lcdcmd(unsigned char cmdout)
{
   lcdport=cmdout;      //Send command to lcdport=PORTB
   rs=0;                  
   rw=0;
   en=1;
   Delay_ms(10);
   en=0;
}

void lcddata(unsigned char dataout)
{
   lcdport=dataout;   //Send data to lcdport=PORTB
   rs=1;
   rw=0;
   en=1;
   Delay_ms(10);
   en=0;
}