Alphabets are not displayed correctly on dot matrix display. !!!

[ahmad2005]

What is the problem of this coding ? why Alphabets are not displayed correctly ?

char i, error, byte_read;                 // Auxiliary variables
int cnt;
unsigned short Alphabets[40]={ //0xFF, 0x01, 0xEE, 0xEE, 0xEE, 0x01, 0xFF, 0xFF,   //A
                               //0xFF, 0x00, 0x76, 0x76, 0x76, 0x89, 0xFF, 0xFF,   //B
                               0xFF, 0xC0, 0xF6, 0xF6, 0xF6, 0xFE, 0xFF, 0xFF,//F
                               0xFF, 0xE0, 0xDF, 0xDF, 0xDF, 0xE0, 0xFF, 0xFF, // U
                               0xFF, 0xC0, 0xF6, 0xF6, 0xF6, 0xC9, 0xFF, 0xFF, // R
                               0xFF, 0xC1, 0xF6, 0xF6, 0xF6, 0xC1, 0xFF, 0xFF, //A
                               0xFF, 0xC0, 0xFD, 0xFB, 0xFD, 0xC0, 0xFF, 0xFF,  //M
                               };
unsigned short count, column, num, repeat;
 
 sbit Serial_Data at RC2_bit;
 sbit SH_Clk at RC6_bit;
 sbit ST_Clk at RC7_bit;
 sbit CD4017_Clk at RA2_bit;
 sbit CD4017_RST at RA1_bit;
 
void send_data(unsigned int temp){
 unsigned int Mask = 0x01, t, Flag;
 for (t=0; t<8; t++){
  Flag = temp & Mask;
  if(Flag==0) Serial_Data = 0;
  else Serial_Data = 1;
  SH_Clk = 1;
  SH_Clk = 0;
  Mask = Mask << 1;
 }
// Apply clock on ST_Clk
   ST_Clk = 1;
   ST_Clk = 0;
}

void main() {
TRISB=0x00;
PORTB=0;
TRISC=0x00;
PORTC=0x00;
TRISA=0x00;
PORTA=0x00;
delay_ms(100);

//send_data(0xBD);
//send_data(0xFF);

while(1)
        {
for (num=0; num<1; num++) {

     for (repeat=0; repeat<100; repeat++){
      column = 1;
      cnt=0;
      //PORTB.RA2=1;
      for(count = num*40;count < (num*40+40);count++){
        PORTB=0;
        send_data(Alphabets[count]);
        //PORTB=cnt;
        PORTA.RA1=0;
        PORTB = column;
        Delay_ms(1);
        PORTA.RA1=1;
        column = column<<1;
        //cnt++;
        }
     }
        }
}

}

View attachment Moving dot matrix.zip

 

[ahmad2005]

no replays !!!