parts.c

DS1302资料lcd.rar

#include <reg52.h>
#define LCM_Data P2
																																		 #include <reg52.h>
sbit LCM_RS=P0^2;
sbit LCM_RW=P0^4; //定义引脚
sbit LCM_E=P0^6;
sbit LCM_power = P0^0;


void Wdata_1602(unsigned char WDLCM);
void Wcommand_1602(unsigned char WCLCM,BuysC);
unsigned char  Rstatus_1602(void);
void Init_1602(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 Display_a_passage(unsigned char code *DData);
void Delay5Ms(void);
//写数据
void Wdata_1602(unsigned char WDLCM)
{
 Rstatus_1602(); //检测忙
 LCM_RS = 1;
 LCM_Data = WDLCM;
 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 = 0; //延时
 LCM_E = 1;
}

//写指令
void Wcommand_1602(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
{
 if (BuysC) 
 Rstatus_1602(); //根据需要检测忙
 LCM_Data = WCLCM;
 LCM_RS = 0;
 LCM_RW = 0; 
 LCM_E = 0;
 LCM_E = 1; 
}
//读状态
unsigned char  Rstatus_1602(void)
{
 LCM_Data = 0xFF; 
 LCM_RS = 0;
 LCM_RW = 1;
 LCM_E = 0;	
 LCM_E = 1; 
  Delay5Ms(); 
  Delay5Ms(); Delay5Ms(); 
 Delay5Ms(); 
 return(LCM_Data); 
}

void Init_1602(void) //LCM初始化
{LCM_E=0;
 LCM_power = 0;
 LCM_Data = 0;
 Wcommand_1602(0x38,0); //三次显示模式设置，不检测忙信号
 Delay5Ms(); 
 Wcommand_1602(0x38,0);
 Delay5Ms(); 
 Wcommand_1602(0x38,0);
 Delay5Ms(); 
 Wcommand_1602(0x38,1); //显示模式设置,开始要求每次检测忙信号
 Wcommand_1602(0x08,1); //关闭显示
 Wcommand_1602(0x01,1); //显示清屏
 Wcommand_1602(0x06,1); // 显示光标移动设置
 Wcommand_1602(0x0C,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
 Wcommand_1602(X, 0); //这里不检测忙信号，发送地址码
 Wdata_1602(DData);
}
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
 unsigned char ListLength=0;
 Y &= 0x1;
 X &= 0x0F; //限制X不能大于15，Y不能大于1
 while (DData[ListLength]!='/') //若到达字串尾则退出
  {
   if (X <= 0x0F) //X坐标应小于0xF
    {
     DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
     ListLength++;
     X++;
    }
  }
}

void Display_a_passage(unsigned char code *DData)
{
 unsigned char X,Y,ListLength=0;
 Y= 0x00;
 X= 0x00; //限制X不能大于15，Y不能大于1
 while (DData[ListLength]!='~') //若到达字串尾则退出
  {
   if (X <= 0x0F) //X坐标应小于0xF
    {
     DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
     ListLength++;
     X++;
    }
	else
	{
	X=0x00;
	if(Y==0x00)
	{
	Y=0x01;
	}
	else  if(Y==0x01)
	{
	Delay5Ms();
	Init_1602();
	Y=0x00;
	}
	}
  }
} 

//10ms延时
void Delay5Ms(void)
{
  unsigned int T=3555;
  for(;T>=40;)
  {	T--;
  }

}