1602.c

CY7C68013A 控制LCD1602的源程序

//**************************************************************************************
//硬件连接：1602VDD接5V，VO接地，BL1接5V，BL2接地，8根数据线接IOA口，RS RW E分别接IOB4-6口
//**************************************************************************************
sfr OEA     = 0xB2;
sfr IOA     = 0x80;
sfr IOD     = 0xB0;
sfr IOB     = 0x90;
sfr OED     = 0xB5;
sfr OEB     = 0xB3;
#include <string.h>
#define Busy 0x80 //用于检测LCM状态字中的Busy标识
#define LCM_Data IOA
sbit LCM_RS=IOB^4;            	//寄存器选择
sbit LCM_RW=IOB^5;        		//读/写控制
sbit LCM_E=IOB^6;            	//读/写使能
int i,j;

//自定义字符列表
//=====================================================================================
unsigned char 	character0[8] = {0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02}, 		//年
				character1[8] = {0x0f,0x09,0x0f,0x09,0x0f,0x09,0x0b,0x11},		//月
				character2[8] = {0x0f,0x09,0x09,0x09,0x0f,0x09,0x09,0x0f},		//日
	
				characterN[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};		//日
//=====================================================================================


//=====================================================================================
//延时程序
//=====================================================================================
void Delay5Ms(void)
{
 unsigned long int TempCyc = 5552;
 while(TempCyc--);
}

void Delay400Ms(void)
{
 unsigned char TempCycA = 5;
 unsigned int TempCycB;
 while(TempCycA--)
{
TempCycB=7269;
while(TempCycB--);
};
}


//=====================================================================================
//读写子程序
//=====================================================================================

//读数据
unsigned char ReadDataLCM(void)
{
LCM_RS = 1; 
LCM_RW = 1;
LCM_E = 1;
LCM_E = 0;
for(i=0;i<100;i++);
LCM_E = 1;
return(LCM_Data);
}

//读状态
unsigned char ReadStatusLCM(void)
{
LCM_Data = 0xFF; 
LCM_RS = 0;
LCM_RW = 1;
LCM_E = 1;
LCM_E = 0;
for(i=0;i<100;i++);
LCM_E = 1;
//while (LCM_Data & Busy); //检测忙信号
return(LCM_Data);
}
//写数据
void WriteDataLCM(unsigned char WDLCM)
{
ReadStatusLCM(); //检测忙
LCM_Data = WDLCM;
LCM_RS = 1;
LCM_RW = 0;
LCM_E = 1; 
LCM_E = 0; //若晶振速度太高可以在这后加小的延时
for(i=0;i<100;i++);//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 = 1;
LCM_E = 0;
for(i=0;i<100;i++);
LCM_E = 1; 
}

//=====================================================================================
//初始化子程序
//=====================================================================================

void LCMInit(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
Delay5Ms(); 
WriteCommandLCM(0x38,0);
Delay5Ms(); 
WriteCommandLCM(0x38,0);
Delay5Ms(); 
WriteCommandLCM(0x38,1); // 显示模式设置,开始要求每次检测忙信号
Delay5Ms();
WriteCommandLCM(0x08,1); // 关闭显示
Delay5Ms();
WriteCommandLCM(0x01,1); // 清屏
Delay5Ms();
WriteCommandLCM(0x06,1); // 显示光标移动设置
Delay5Ms();
WriteCommandLCM(0x0c,1); // 显示开及光标设置
Delay5Ms();
}


//=====================================================================================
//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, 0); //这里不检测忙信号，发送地址码
WriteDataLCM(DData);
}

//=====================================================================================
//按指定位置显示一串字符
//void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
//说明:  x(0-15):x参数 y(0-1):y参数 DData(字符串):要显示的内容(英文、数字、符号)
//=====================================================================================
 
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
  unsigned char ListLength,j;
  ListLength = strlen(DData);
  Y &= 0x1;
  X &= 0xF; //限制X不能大于15，Y不能大于1
      if (X <= 0xF) //X坐标应小于0xF
        { 
		    for(j=0;j<ListLength;j++)
		      {
             DisplayOneChar(X, Y, DData[j]); //显示单个字符
             X++;
            }
        }
}

//=====================================================================================
//显示自定义字符
//void mychar(char xx,char yy,unsigned char *character,unsigned char saveto)
//说明:xx(0-15):为x参数.yy(0-1):y参数.character:要显示的字符的列表地址,在程序前面有定义
//saveto(1-7)为字符保存的RAM，每屏最多显示7个自定义字符
//(0x00-0x0h是自定义字符)
//=====================================================================================

void mychar(char xx,char yy,unsigned char *character,unsigned char saveto)
{
	unsigned char add = (saveto<<3) | 0x40;
	unsigned char t;						//临时变量，每一行的值

	t=*(character+0);
	WriteCommandLCM(add, 0); 				//第1行
	WriteDataLCM(t);
	t=*(character+1);
	WriteCommandLCM(add+1, 0); 				//第2行
	WriteDataLCM(t);
	t=*(character+2);
	WriteCommandLCM(add+2, 0); 				//第3行
	WriteDataLCM(t);
	t=*(character+3);
	WriteCommandLCM(add+3, 0); 				//第4行
	WriteDataLCM(t);
	t=*(character+4);
	WriteCommandLCM(add+4, 0); 				//第5行
	WriteDataLCM(t);
	t=*(character+5);
	WriteCommandLCM(add+5, 0); 				//第6行
	WriteDataLCM(t);
	t=*(character+6);
	WriteCommandLCM(add+6, 0); 				//第7行
	WriteDataLCM(t);
	t=*(character+7);
	WriteCommandLCM(add+7, 0); 				//第8行
	WriteDataLCM(t);

	DisplayOneChar(xx,yy,saveto);				//显示字符
}
//=====================================================================================
//主函数
//=====================================================================================

main()
{
	OEA=0xff;
	OEB=0xff;
	OED=0xff;							//68013IO口初始化
	Delay400Ms();
    LCMInit();
	Delay400Ms();						//1602初始化
while(1)
	{
	DisplayListChar(0,0,"This is ListChar");
	DisplayListChar(0,1,"!");
	for(j=0;j<30;j++)for(i=0;i<30000;i++);
	WriteCommandLCM(0x01,1); //清屏
	Delay5Ms();

	DisplayListChar(0,0,"This is OneChar:");
	DisplayOneChar(0,1,0x4f);
	DisplayOneChar(1,1,0x6e);
	DisplayOneChar(2,1,0x65);
	DisplayOneChar(3,1,0x21);
	for(j=0;j<30;j++)for(i=0;i<30000;i++);
	WriteCommandLCM(0x01,1); //清屏
	Delay5Ms();

	DisplayListChar(0,0,"This is MyChar:");
	mychar(0,1, character0,1);
	mychar(1,1, character1,2);
	mychar(2,1, character2,3);
	for(j=0;j<30;j++)for(i=0;i<30000;i++);
	WriteCommandLCM(0x01,1); //清屏
	Delay5Ms();
	}
}