1602.h

来自「双机通讯程序」· C头文件 代码 · 共 147 行

#ifndef __1602_H__
#define __1602_H__
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit LCM_RW=P3^1;   //定义引脚
sbit LCM_RS=P3^0;
sbit LCM_E=P3^2;
#define LCM_Data  P2    //数据线
#define Busy    0x80  //用于检测LCM状态字中的Busy标识
void dely(uint x);
void LCMreset(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);

unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);

unsigned char code line1[] = {"press the key"};
unsigned char code line2[] = {"input x,y:      "};
unsigned char code line3[] = {"input x,y,r:    "};
unsigned char code line4[] = {"save finished!!!"};
unsigned char code line5[] = {"wrong code!!!!!!"};

//写数据
void WriteDataLCM(unsigned char WDLCM)
{
	ReadStatusLCM(); //检测忙
	LCM_Data=WDLCM;
	LCM_RS=1;
	LCM_RW=0;
	LCM_E=0; //若晶振速度太高可以在这后加小的延时
	LCM_E=0; //延时
	LCM_E=1;
}

//写指令
void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
{
	if (BuysC) ReadStatusLCM(); //根据需要检测忙
	LCM_Data = WCLCM;
	LCM_RS = 0;
	LCM_RW = 0;
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;
}

//读数据
unsigned char ReadDataLCM(void)
{
	LCM_RS = 1;
	LCM_RW = 1;
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;
	return(LCM_Data);
}

//读状态
unsigned char ReadStatusLCM(void)
{
	LCM_Data=0xFF;
	LCM_RS=0;
	LCM_RW=1;
	LCM_E=0;
	LCM_E=0;
	LCM_E=1;
	while(LCM_Data & Busy); //检测忙信号
	return(LCM_Data);
}

void LCMreset(void) //LCM初始化
{
	LCM_Data=0;
	WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
	dely(5);
	WriteCommandLCM(0x38,0);
	dely(5);
	WriteCommandLCM(0x38,0);
	dely(5);

	WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
	WriteCommandLCM(0x08,1); //关闭显示
	WriteCommandLCM(0x01,1); //显示清屏
	WriteCommandLCM(0x06,1); // 显示光标移动设置
	WriteCommandLCM(0x0F,1); // 显示开及光标设置
}

//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
	X |= 0x80; //算出指令码
	WriteCommandLCM(X, 1); //发命令字
	WriteDataLCM(DData); //发数据
}

//按指定位置显示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
	unsigned char ListLength;

  ListLength = 0;
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	while (DData[ListLength]>0x1f) //若到达字串尾则退出
		{
			if (X <= 0xF) //X坐标应小于0xF
				{
					DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
					ListLength++;
					X++;
				}
		}
}

//延时
void delay(uint t)
{uint i;
 for (i=0;i<t;i++);
}
/*void delay400ms(void)
{   delay(50000);
	delay(50000);
	delay(50000);
	delay(50000);
}*/

void dely(uint x)
{
  uchar j;
  while(x--)
  {
    for(j=0;j<125;j++)
	{;}
  }
}




#endif