此文章跟上篇是一样的,只是使用的屏幕是LCD1602
lcd1602.h
#include "head.h"
//引脚定义
//数据口
#define LCD_Data P2
sbit LCD_RS = P0^;
sbit LCD_RW = P0^;
sbit LCD_E = P0^;
#ifndef _LCD1602_H_
#define _LCD1602_H_
//函数声明
void LCD_WriteData(uchar WDLCD);
void LCD_WriteCommand(uchar WCLCD,BuysC);
uchar LCD_ReadData(void);
uchar LCD_ReadStatus(void);
void LCD_Init(void);
void DisplayOneChar(uchar X, uchar Y, uchar DData);
void DisplayListChar(uchar X, uchar Y, uchar *DData);
void DisplayNumber(uchar X, uchar Y, uint32 number,uchar count);
void LCD_Clear(void);
#endif
lcd1602.c
#include "lcd1602.h"
#include "timer.h"
#include "auart.h"
/*
*1602初始化
*输入参数:无
*输出参数:无
*/
void LCD_Init(void)
{
LCD_Data = ;
//三次显示模式设置,不检测忙信号
LCD_WriteCommand(,);
Delayms();
LCD_WriteCommand(,);
Delayms();
LCD_WriteCommand(,);
Delayms();
//显示模式设置,开始要求每次检测忙信号
LCD_WriteCommand(,);
//关闭显示
LCD_WriteCommand(,);
//显示清屏
LCD_WriteCommand(,);
//显示光标移动设置
LCD_WriteCommand(,);
//显示开及光标设置
LCD_WriteCommand(,);
}
/*
*1602写指令
*输入参数:要写入的指令
*输出参数:无
*/
void LCD_WriteCommand(uchar WCLCD,BuysC)
{
if(BuysC)
{
//根据需要检测忙
LCD_ReadStatus();
}
LCD_Data = WCLCD;
LCD_RS = ;
LCD_RW = ;
LCD_E = ;
LCD_E = ;
LCD_E = ;
}
/*
uchar LCD_ReadData(void)
{
LCD_RS = 1;
LCD_RW = 1;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
return(LCD_Data);
}
*/
/*
*1602读状态
×输入参数:无
*输出参数:1602返回的状态
*/
uchar LCD_ReadStatus(void)
{
LCD_Data = ;
LCD_RS = ;
LCD_RW = ;
LCD_E = ;
LCD_E = ;
LCD_E = ;
//检测忙信号
while(LCD_Data & )
{}
return (LCD_Data);
}
/*
*1602按指定位置显示一个字符
*输入参数:X坐标 Y坐标 要显示的字符
×输出参数:无
*/
void DisplayOneChar(uchar X, uchar Y, uchar DData)
{
//限制X不能大于15,Y不能大于1
Y &= ;
X &= ;
//当要显示第二行时地址码+0x40;
if(Y)
{
X |= ;
}
//算出指令码
X |= ;
//这里不检测忙信号,发送地址码
LCD_WriteCommand(X,);
LCD_WriteData(DData);
}
/*
*1602写数据
*输入参数:要写入的数据
*输出参数:无
*/
void LCD_WriteData(uchar WDLCD)
{
//检测忙
LCD_ReadStatus();
LCD_Data = WDLCD;
LCD_RS = ;
LCD_RW = ;
LCD_E = ;
LCD_E = ;
LCD_E = ;
}
/*
*1602指定位置显示一串字符
*输入参数:X坐标 Y坐标 要显示字符串的首地址
*/
void DisplayListChar(uchar X, uchar Y, uchar *DData)
{
uchar ListLength = ;
//限制X不能大于15,Y不能大于1
Y &= ;
X &= ;
while( <= DData[ListLength])
{
if( >= X)
{
//显示单个字符
DisplayOneChar(X,Y,DData[ListLength]);
ListLength++;
X++;
}
}
}
/*
*1602显示一串数字
*
*/
void DisplayNumber(uchar X, uchar Y, uint32 number,uchar count)
{
uchar array[];
uchar i;
array[count] = ;
for (i = count; i>; i--)
{
array[i-] = number % + '0';
number /= ;
}
for (i = ; i < count - ; i++)
{
if(array[i] == '0')
{
array[i] = ' ';
}
else
{
break;
}
}
for (i = ; i < count; i++)
{
PSendChar(array[i]);
}
DisplayListChar(X,Y,array);
}
/*
*显示清屏
*/
void LCD_Clear(void)
{
//显示清屏
LCD_WriteCommand(,);
//显示光标移动设置
LCD_WriteCommand(,);
//显示开及光标设置
LCD_WriteCommand(,);
}