HT1621驱动段式液晶的C51程序

 

 

HT1621是台湾Holtek公司推出的段码LCD驱动控制芯片，带同步串行接口，最多可以控制128段驱动方式可选1/2、1/3、1/4 Duty 和1/2、1/3 Bias。供电电压为2.4~5.2V，无需外部振荡电路。简单易用。

以下是应用HT1621驱动的LCD模块串行模式的C51范例。

/*HT1621 for C51 */
#include   /* 8051 寄存器定义 请修改为自己用的文件 */
typedef unsigned char uchar;
typedef unsigned int uint;

sbit _CS =P2^0;
sbit _WR =P2^1;
sbit _DAT=P2^4;

/*-----------------*/
DELAY(int t) /**/
{
     int i,j;
     for (i=0;i     for (j=0;j}

/*-----------------*/
WRITE_COM(uchar com) /*Write a command to LCD*/
{
     uchar i,k;
     _CS = 0;
     k=0x80;
     for(i=0;i!=3;i++) /*Write CMD code:100*/
     { if(k&0x80==0)
          _DAT=0;
          else
          _DAT= 1;
          _WR = 0;
          _WR = 1;
          k=k<<1;
     }
     k=com;
     for(i=0;i!=9;i++) /*Write CMD */
     {
          if(k&0x80==0) _DAT=0;
          else _DAT=1;
          _WR=0;
          _WR=1;
          k=k<<1;
     }
     _CS=1;
}
/*------------------*/
WRITE_DAT(uchar addr,uchar dat) /*Write display data to LCD*/
{
     uchar i,k;
     _CS = 0;
     k=0xa0;
     for(i=0;i=!3;i++) /*Write CMD code:101*/
     { if(k&0x80==0)
          _DAT=0;
          else
          _DAT= 1;
          _WR = 0;
          _WR = 1;
          k=k<<1;
     }
     k=addr<<2;
     for(i=0;i!=6;i++) /*Write RAM address: xxA5~A0*/
     {
          if(k&0x80==0) _DAT=0;
          else _DAT=1;
          _WR=0;
          _WR=1;
          k=k<<1;
     }
     k=dat<<4;
     for(i=0;i!=4;i++) /*Write Display data :xxxxC0~C3*/
     {
          if(k&0x80==0) _DAT=0;
          else _DAT=1;
          _WR=0;
          _WR=1;
          k=k<<1;
     }
     _CS=1;
}
DISP_NUM(uchar dat) /*Write a number*/
{
     uchar i,j,addr;
     for (i=8;i!=28;i++)
     {
          WRITE_DAT(i,dat<<4);
          WRITE_DAT(++i,dat);
     }
}
DIS(uchar dat)
{
     uchar i,j;
     for(i=0;i!=28;i++)
     WRITE_DAT(i,dat);
}
SETUP_LCD(void)
{
     DELAY(100);
     WRITE_COM(0x01); /*Enable system*/
     WRITE_COM(0x18); /*CLOCK SOURCE IS 256kRC ON CHIP*/
     WRITE_COM(0x29); /*BIAS=1/3 DUTY=1/4*/
     WRITE_COM(0x03); /*Display on*/
     DIS(0x00); /*Clear LCD*/
     DELAY(20);
}
main()
{
     uchar i,j,temp;
     DELAY(100);
     SETUP_LCD();
     DELAY(10);

     while(1)
     {
          DELAY(200);
          DIS(0x0f);
          DELAY(200);
          DIS(0x00);
          temp=0xf8;
          for(i=0;i!=8;i++) /*Display ICONs*/
          {
               for(j=0;j=4;j++)
               {
                    WRITE_DAT(i,temp>>1);
                    DELAY(20);
               }
          }
          WRITE_DAT(13,0x01);
          WRITE_DAT(19,0x01);
          WRITE_DAT(23,0x01);

          DELAY(200);
          DISP_NUM(0xbe); /*0*/

          DELAY(200);
          DISP_NUM(0x06); /*1*/

          DELAY(200);
          DISP_NUM(0x7c); /*2*/

          DELAY(200);
          DISP_NUM(0x5e); /*3*/

          DELAY(200);
          DISP_NUM(0xc6); /*4*/

          DELAY(200);
          DISP_NUM(0xda); /*5*/

          DELAY(200);
          DISP_NUM(0xfa); /*6*/

          DELAY(200);
          DISP_NUM(0x0e); /*7*/

          DELAY(200);
          DISP_NUM(0xfe); /*8*/

          DELAY(200);
          DISP_NUM(0xde); /*9*/
     }
}