k1621.c

用ht1621驱动笔段式液晶屏,用AT89S52做主控制器。

/*MCU:AT89S51
*Freq:12M
.edit Tab:4
driver:ht1621   //judge communication namely 1621 work
**********************************/

#include <reg51.h>
#include <intrins.h>
#include <absacc.h>

#define uchar unsigned char
#define uint unsigned int
#define _Nop() _nop_()
                            //0b1000 0100 0000  1/2duty 2com for 0x40
#define BIAS 0x40          //0b1000 0101 0010  1/3duty 4com for 0x52
#define SYSDIS 0X00   //0b1000 0000 0000  关振系统荡器和LCD偏压发生器
#define LCDOFF 0X04   //0b1000 0000 0100  关LCD偏压
#define LCDON 0X06   //0b1000 0000 0110  打开LCD偏压
#define SYSEN 0X02   //0b1000 0000 0010 打开系统振荡器
#define XTAL 0x28   //0b1000 0010 1000 外部接时钟
#define RC256 0X30   //0b1000 0011 0000  内部时钟
#define TONEON 0X12   //0b1000 0001 0010  打开声音输出
#define TONEOFF 0X10   //0b1000 0001 0000 关闭声音输出
#define WDTDIS 0X0A   //0b1000 0000 1010  禁止看门狗

//HT1621控制位（液晶模块接口定义，根据自已的需要更改）
sbit HT1621_DAT=P0^0;
sbit HT1621_CS=P0^2;    //lower enable
sbit HT1621_WR=P0^1;    //rising edge



//0,1,...4     //2 com also calculator 4 coms but other 2 com dont out
uchar code Ht1621Tab[]=
{
0xc4,0xc8,0x04,0x40,0x4c,0x88,0x4c,0x48,0x8c,0x40,
0xc8,0x48,0xc8,0xc8,0x44,0x40,0xcc,0xc8,0xcc,0x48
};
// 1 is display , 0 is off

//13_LED  5...8,9
uchar code Ht1621Tab1[]={0xeb,0x0a,0xad,0x8f,0x4e,0xc7,0xe7,0x8a,0xef,0xcf};

//uchar data DispBuffer;


//delay us
void Delay(uchar us)  //5,7,9
{
 while(--us);
}


//delay ms
void DelayMS(uint iMs)
{
 uint i,j;
   for(i=0;i<iMs;i++)
    for(j=0;j<65;j++) Delay(1);

}
//完成写一个命令包括头(100)
void Ht1621WrCmd(uchar ucTmpCmd)
{
 uchar data i,ucCmdByte=0x80;
 HT1621_CS=0;
 _Nop();
 _Nop();
 for (i=0;i<4;i++)
 {
  if (ucCmdByte&0x80) HT1621_DAT=1;
  else  HT1621_DAT=0;
  HT1621_WR=0;
  _Nop();
  _Nop();
  HT1621_WR=1;
  _Nop();
  ucCmdByte<<=1;
 }
 for (i=0;i<8;i++)
 {
  if (ucTmpCmd&0x80) HT1621_DAT=1;
  else HT1621_DAT=0;
  HT1621_WR=0;
  _Nop();
  _Nop();
  HT1621_WR=1;
  _Nop();
  ucTmpCmd<<=1;
 }
 HT1621_CS=1;
 _Nop();
 _Nop();
}

//写命令+地址
void Ht1621WrDataCmd(uchar ucAddr)
{
 uchar data i,ucDataCmd=0x05;    //101
 ucDataCmd<<=5;
 for (i=0;i<3;i++)
 {
  if (ucDataCmd&0x80) HT1621_DAT=1;
  else HT1621_DAT=0;
  HT1621_WR=0;
  _Nop();
  _Nop();
  HT1621_WR=1;
  _Nop();
  ucDataCmd<<=1;
 }
 ucAddr<<=2;
 for (i=0;i<6;i++)
 {
  if (ucAddr&0x80) HT1621_DAT=1;
  else HT1621_DAT=0;
  HT1621_WR=0;
  _Nop();
  _Nop();
  HT1621_WR=1;
  _Nop();
  ucAddr<<=1;
 }

}

//完成写一个字节数据
void Ht1621WrByte(uchar ucTmpData)
{
 uchar data i;

 for (i=0;i<8;i++)
 {
  if (ucTmpData&0x80) HT1621_DAT=1;
  else HT1621_DAT=0;
  HT1621_WR=0;
  _Nop();
  _Nop();
  HT1621_WR=1;
  _Nop();
  ucTmpData<<=1;
 }

}


void CPU_Init()
{
 P0=0XFF;   //input
 P1=0xff;
 P2=0XFF;
 P3=0XFF;
}


void Ht1621_Init()
{
 HT1621_CS=1;
 HT1621_WR=0;
 HT1621_DAT=1;
 DelayMS(2000);     //延时使LCD工作电压稳定
 Ht1621WrCmd(BIAS);
 Ht1621WrCmd(RC256);    //使用内部振荡器
 Ht1621WrCmd(SYSDIS);
 Ht1621WrCmd(WDTDIS);
 Ht1621WrCmd(SYSEN);
 Ht1621WrCmd(LCDON);
}

void main()
{
 uchar data i;
 CPU_Init();
 Ht1621_Init();     //上电初始化LCD,init success full light


  HT1621_CS=0;
  Ht1621WrDataCmd(12);    //往RAM的地址4写数据  这里的参数范围为:0-31
  for (i=0;i<8;i++)
  {
   Ht1621WrByte(Ht1621Tab[i]);
  }
   HT1621_CS=1;
   DelayMS(2000);      //2S
   while(1) ;
}