/***********************************
*MCU:AT89S51
*Freq:12M
.edit Tab:4
driver:ht1621
**********************************/

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

#define uchar unsigned char
#define uint unsigned int
#define _Nop() _nop_()

#define BIAS 0x52          //0b1000 0101 0010  1/3duty 4com
#define SYSDIS 0X00   //0b1000 0000 0000  關振系統蕩器和LCD偏壓發生器
#define LCDOFF 0X04   //0b1000 0000 0100  關LCD偏壓
#define LCDON 0X06   //0b1000 0000 0110  打開LCD偏壓
#define SYSEN 0X02   //0b1000 0000 0010 打開系統振蕩器
#define XTAL 0x28   //0b1000 0010 1000 外部接時鐘
#define RC256 0X30   //0b1000 0011 0000  內部時鐘
#define TONEON 0X12   //0b1000 0001 0010  打開聲音輸出
#define TONEOFF 0X10   //0b1000 0001 0000 關閉聲音輸出
#define WDTDIS 0X0A   //0b1000 0000 1010  禁止看門狗

//HT1621控制位（液晶模塊接口定義，根據自已的需要更改）
sbit HT1621_DAT=P1^0;
sbit HT1621_CS=P1^1;    //lower enable
sbit HT1621_WR=P1^2;    //rising edge
   


//0,1,...8,9
uchar code Ht1621Tab[]={0xf5,0x05,0xb6,0x57,0x53,0xd3,0xf3,0x85,0xf7,0xd7};

//13_LED  0,1...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);
      
}
//完成寫一個命令包括頭(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(); 
}

//寫命令+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;
 }
  
}

//完成寫一個字節數據
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(200);     //延時使LCD工作電壓穩定
 Ht1621WrCmd(BIAS);
 Ht1621WrCmd(RC256);    //使用內部振蕩器
 Ht1621WrCmd(SYSDIS);
 Ht1621WrCmd(WDTDIS);
 Ht1621WrCmd(SYSEN);
 Ht1621WrCmd(LCDON);
}

void main()
{
   uchar data i;
   SP=0X60;
   CPU_Init();
   Ht1621_Init();     //上電初始化LCD
   while(1)
   {
    //for (i=0;i<10;i++)
    //{
     HT1621_CS=0;
     Ht1621WrDataCmd(4);    //往RAM的地址4寫數據  這里的參數范圍為:0-31
   //  Ht1621WrByte(Ht1621Tab1[i]);
     Ht1621WrByte(0xaa);
     HT1621_CS=1;
     P3=0xaa;
 //  DelayMS(200);      //2mS
  
   // } 
   }
}