display.c

单片机数据通讯典型应用(光盘内容）

//文件名：display.c
#include "delay.h"
#include "intrins.h" 
#include "display.h" 
void WriteCommand(unsigned char c) 
{
	delay_ms(5);
	E=0;
	RS=0;
	RW=0;
	_nop_();
	E=1;
	Data=c;
	E=0;
}
void WriteData(unsigned char c)
{
	delay_ms(5);
	E=0;
	RS=1;
	RW=0;
	_nop_();
	E=1;
	Data=c;
	E=0;
	RS=0;
}
void InitLcd()
{
	delay_ms(15);
	WriteCommand(0x38); //显示模示
	WriteCommand(0x38); 
	WriteCommand(0x38); 
	WriteCommand(0x06); //显示光标移动位置
	WriteCommand(0x0c); //显示开及光标设置
	WriteCommand(0x01); //显示清屏
}
void ShowChar(unsigned char pos_x, unsigned char pos_y,unsigned char c)
{
	unsigned char p;
	if ( pos_y & 0x01 )
		p = ( pos_y & 0x0f ) | 0xC0;	//是第二行则命令代码高4位为0xc
	else 
		p = ( pos_x & 0x0f ) | 0x80;	//是第一行则命令代码高4位为0x8
	WriteCommand (p);					//写命令
	WriteData (c);   					//写数据
}
void ShowString (unsigned char n,char *ptr)
{
	unsigned char i;
	for (i=0;i<16;i++)
		ShowChar ( 0 , n , *( ptr+i ) ) ;	//循环显示16个字符
}