[PIC] Scrolling Text on 8x8 LED Dot matrix

#define shcp PORTB.B0
#define serialdata PORTB.B1
#define stcp PORTB.B2
#define addressbus PORTC
#include<font.h>

unsigned char i,j,k,sd,my_txt_lgth;     // 'i' use for stcp loop
                                        //  'j' use for shcp loop
                                        // 'k' use for txt length measure
                                        //'sd' stores single bit by selecting character from font
                                        //array and taking %2.
                                        // my_txt_lgth for storing string length


void clearReg() //shift register clear function
{
for(i=0;i<24;i++)
{
shcp = 0;
serialdata = 0;
shcp = 1;
}
}

void Serialize_And_Display(unsigned char *my_txt)   //function for serializing the data
{
my_txt_lgth = strlen(my_txt); //my_txt_lgth holds the number of characters in the strings
for(k=0;k<my_txt_lgth;k++) // enable the only digit with respect to my_txt_lgth
{
for(j=0;j<8;j++)  // 2nd loop that select row and latch data
{
stcp = 0;          //Storage clock pulse for shift register
for(i=0;i<8;i++)  // 1st loop that serialiaze data and store in shift register
{
shcp = 0;          //Shift clock pulse for Shift register
sd = (font[*my_txt-32][j]>>i)%2;    //Serialize function
serialdata = sd;        //send sd on PORTB.B1
shcp = 1;         //high the shift clock pulse of shift register
Delay_us(100);
}
addressbus =j;    //Select the Rows 1 to 7 of Dotmatrix
stcp = 1;
clearReg();
Delay_us(100);
}
my_txt++;        //select the address of next ascii character
}
my_txt = 0;      //when all characters are done reset the address
}

void main()
{
TRISB=TRISC=0x00;      //PORTS set as output
while(1)
{
Serialize_And_Display("Hello");
}
}