lcd显示数字c语言程序,0802LCD 4位显示程序 PIC单片机C语言程序
//#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);
}
}