Single chip dual color dot matrix display specific graphics

/*-----------------------------------------------  

  Name: Two-color dot matrix  

  Forum: www.doflye.net  

  Written by: shifang  

  Modification: None  

  Content: Using hc595 to drive two-color dot matrix   

------------------------------------------------*/  

#include //Include the header file. Generally, no modification is required. The header file contains the definition of special function registers.  

#include   

//unsigned char  segout[8]={0,1,2,3,4,5,6,7}; //8列  

unsigned char  segout[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //8列  

unsigned char code tab[]={  

                        0x08,0x1C,0x3E,0x7F,0x1C,0x1C,0x1C,0x1C,  

                        };  

/*------------------------------------------------  

                Hardware Port Definition  

------------------------------------------------*/  

sbit LATCH = P1^0;   

sbit SRCLK= P1^1;  

sbit SER = P1^2;  

sbit LATCH_B = P2^2;  

sbit SRCLK_B= P2^1;  

sbit SER_B= P2^0;  

/*------------------------------------------------  

 uS delay function, with input parameter unsigned char t, no return value  

 unsigned char is used to define an unsigned character variable, whose value range is  

 0~255 Here we use a 12M crystal oscillator. Please use assembly for accurate delay. Approximate delay  

 The length is as follows: T=tx2+5 uS   

------------------------------------------------*/  

void DelayUs2x(unsigned char t)  

{     

 while(--t);  

}  

/*------------------------------------------------  

 mS delay function, with input parameter unsigned char t, no return value  

 unsigned char is used to define an unsigned character variable, whose value range is  

 0~255 Here we use a 12M crystal oscillator. Please use assembly code for accurate delay.  

------------------------------------------------*/  

void DelayMs(unsigned char t)  

{  

 while(t--)  

 {  

     //About 1mS delay  

     DelayUs2x(245);  

DelayUs2x(245);  

 }  

}  

/*------------------------------------------------  

                Send Bytes Program  

------------------------------------------------*/  

void SendByte(unsigned char dat)  

{      

  unsigned char i;   

   for(i=0;i<8;i++)  

        {  

         SRCLK=0;  

         SER=that&0x80;  

         dat<<=1;  

         SRCLK=1;  

         }  

}  

/*------------------------------------------------  

                Send double byte program  

     595 cascade, n 595, need to send n bytes and then latch  

------------------------------------------------*/  

void Send2Byte(unsigned char dat1,unsigned char dat2)  

{      

   SendByte(dat1);  

   SendByte(dat2);        

}  

/*------------------------------------------------  

                   595 Latch Program  

 After 595 cascade sends data, latch is valid  

------------------------------------------------*/  

void Out595(void)  

{  

        LATCH=1;  

        _nop_();  

        LATCH=0;  

}  

/*------------------------------------------------  

                Send Bitcode Bytes Program  

               Use another separate 595  

------------------------------------------------*/  

void SendSeg(unsigned char dat)  

{      

unsigned char i;   

   for(i=0;i<8;i++) //send bytes  

        {  

         SRCLK_B=0;  

         SER_B=dat&0x80;  

         dat<<=1;  

         SRCLK_B=1;  

         }  

      LATCH_B=1; //Latch  

      _nop_();  

      LATCH_B=0;  

}  

/*------------------------------------------------  

                   Main Program  

------------------------------------------------*/  

void main()  

{  

unsigned char i,j,k;  

while(1)  

{  

              for(i=0;i<8;i++) //8 columns display  

                  {  

                     SendSeg(segout[i]);  

Send2Byte(~tab[i],0xff); //Display arrow graphics at fixed position  

Out595();  

                     DelayMs(1);  

Send2Byte(0xff,0xff);//delay(10); //Prevent ghosting  

Out595();  

                  }  

        }  

}