Arduino Learning

#define CS   2  //Pin 2 as chip selection output
#define WR   3  //Pin 3 as read clock output
#define DATA 4  //Pin 4 as Serial data output
 
#define CS1    digitalWrite(CS, HIGH) 
#define CS0    digitalWrite(CS, LOW)
#define WR1    digitalWrite(WR, HIGH) 
#define WR0    digitalWrite(WR, LOW)
#define DATA1  digitalWrite(DATA, HIGH) 
#define DATA0  digitalWrite(DATA, LOW)
 
#define sbi(x, y)  (x |= (1 << y))  
#define cbi(x, y)  (x &= ~(1 <<y ))      
#define uchar   unsigned char 
#define uint   unsigned int 
 
#define  ComMode    0x52  
#define  RCosc      0x30  
#define  LCD_on     0x06 
#define  LCD_off    0x04 
#define  Sys_en     0x02 
#define  CTRl_cmd   0x80
#define  Data_cmd   0xa0   
 
 
/*0,1,2,3,4,5,6,7,8,9,A,b,C,c,d,E,F,H,h,L,n,N,o,P,r,t,U,-, ,*/
const char num[]={0x7D,0x60,0x3E,0x7A,0x63,0x5B,0x5F,0x70,0x7F,0x7B,0x77,0x4F,0x1D,0x0E,0x6E,0x1F,0x17,0x67,0x47,0x0D,0x46,0x75,0x37,0x06,0x0F,0x6D,0x02,0x00,};
char dispnum[6]={0x00,0x00,0x00,0x00,0x00,0x00};
 
 
void SendBit_1621(uchar sdata,uchar cnt)
{
  uchar i;
  for(i=0;i<cnt;i++)
  {
    WR0;
    if(sdata&0x80) DATA1;
    else DATA0;
    WR1;
    sdata<<=1;
  }
}
 
void SendCmd_1621(uchar command)
{
  CS0;
  SendBit_1621(0x80,4);
  SendBit_1621(command,8);
  CS1;
}
 
void Write_1621(uchar addr,uchar sdata)
{
  addr<<=2;
  CS0;
  SendBit_1621(0xa0,3);
  SendBit_1621(addr,6);
  SendBit_1621(sdata,8);
  CS1;
}
 
void HT1621_all_off(uchar num)
{
  uchar i;
  uchar addr=0;
  for(i=0;i<num;i++)
  {
    Write_1621(addr,0x00);
    addr+=2;
  }
}
 
void HT1621_all_on(uchar num)
{
  uchar i;
  uchar addr=0;
  for(i=0;i<num;i++)
  {
    Write_1621(addr,0xff);
    addr+=2;
  }
}
 
void Init_1621(void)
{
  SendCmd_1621(Sys_en);
  SendCmd_1621(RCosc);
  SendCmd_1621(ComMode);
  SendCmd_1621(LCD_on);
}
 
void displaydata(int p)
{
  uchar i=0;
  switch(p)
  {
    case 1:
    sbi(dispnum[0],7);
    break;
    case 2:
    sbi(dispnum[1],7);
    break;
    case 3:
    sbi(dispnum[2],7);
    break;
    default:break;
  }
  for(i=0;i<=5;i++)
  {
    Write_1621(i*2,dispnum[i]);
  }
}
 
 
 
void setup() {
  pinMode(CS, OUTPUT); // 
  pinMode(WR, OUTPUT); // 
  pinMode(DATA, OUTPUT); //
  CS1;
  DATA1;
  WR1;
  delay(50);
  Init_1621();
  HT1621_all_on(16);
  delay(1000);
  HT1621_all_off(16);
  delay(1000);
 
  displaydata(1);//light on the first decimal point starting from the right side
  dispnum[5]=num[5];
  dispnum[4]=num[4];
  dispnum[3]=num[3];
  dispnum[2]=num[2];
  dispnum[1]=num[1];
  dispnum[0]=num[0];
 
  sbi(dispnum[5],7);
  //cbi(dispnum[5],7);
  sbi(dispnum[4],7);
  //cbi(dispnum[4],7); 
  sbi(dispnum[3],7);
  //cbi(dispnum[3],7); 
 
 
 
  Write_1621(0,num[0]);  //0
  Write_1621(2,num[1]);  //1
  Write_1621(4,num[2]);  //2
  Write_1621(6,num[3]);  //3
  Write_1621(8,num[4]);  //4
  Write_1621(10,num[5]); //第5
 
}
 
void loop() {
  // put your main code here, to run repeatedly:
 
}