16020.c

1602驱动原代码. 为KELL C编译

#include <stc89c51.h>
#define uchar unsigned char 

sbit ebit =P3^5;
sbit rw=P3^1;
sbit rs=P3^0;


void delay(uchar a);
void stalcd(void);
void writelcd(uchar);
void readrw(void);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
			  void writesjlcd(uchar a) ;

  uchar code aaa[]={"///www.kxit.com"  };
  uchar code bbb[]={"//[e-mail]"} ;

  void delay1(void)
  {
   unsigned long int a;
   for(a=0;a<50000 ;a++)
   WDT_CONTR=0x3f; 
   }
void writelcd(uchar a)         //写指令 或指令
{
  ebit=1;
  delay(1);
  rs=0;
   delay(1);
  
  rw=0;
   delay(1);
  
  P0=a;
  delay(1);
  ebit=0;
  delay(20);
  ebit=1;
}


 void writesjlcd(uchar a)         // 或数据
{
  ebit=1;
  delay(1);
  rs=1;
   delay(1);
  
  rw=0;
   delay(1);
  
  P0=a;
  delay(1);
  ebit=0;
  delay(20);
  ebit=1;
}
void readrw(void)				//查状态
{ uchar a=200;
  P0=0xff;
   delay(1);
  rs=0;
   delay(1);
  rw=1;
	delay(1);
  ebit=1;

  	 delay(1);
  ebit=0;
	  delay(1);
  delay(1);
	 delay(1);
  ebit=1;
	 delay(1);
  delay(5);
  do
  {
  delay(1);
  if(P0==0xff) break;
  }while(a--);

}
  

void delay(uchar a)					 //延时函数，为赋值的15倍
{
  unsigned int  b,c;
  for(b=0;b<a;b++)
  for(c=0;c<=150;c++);
}

 void stalcd(void)                    //初始化函数
 {
   delay(200);
   writelcd(0x38);
      delay(50);
   writelcd(0x38);
      delay(50);
   writelcd(0x38);
   readrw();
   writelcd(0x38);          //设置显示模式
   readrw();
   writelcd(0x08);           //关闭显示
   readrw();
   writelcd(0x01);          //显示清屏
   readrw();
   writelcd(0x06);          //显示光标移动位置
   readrw();
   writelcd(0x0c);           //显示开关和光标设置
}



void main(void)
{

  	WDT_CONTR=0x3f; 
delay(200); //启动等待，等LCM讲入工作状态
stalcd(); //LCM初始化
delay(50); //延时片刻(可不要)
while(1)
{


DisplayListChar(0, 0, aaa);
DisplayListChar(0, 1, bbb);
delay1();


 WDT_CONTR=0x3f;  }
}

 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!=0) X |= 0x40; //当要显示第二行时地址码+0x40;
X |= 0x80; //算出指令码
writelcd(X); //这里不检测忙信号，发送地址码
writesjlcd(DData);
}


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]>0x20) //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++;
}
}
}