Department of Electronics & Communication Engineering ELEC 20007 Microcontrollers Lab Program 4: Interfacing Seven Segment Display. Write an embedded C program to control the 2 seven segment displays to display a 00 to 99 counter. Maintain a delay of 0.5 sec between each count. Interfacing Connections: In the common cathode display, all the cathode connections of the LED segments are joined together to logic “0” or ground. The individual segments are illuminated by application of a “HIGH”, or logic “1” signal via microcontroller pin. Table below shows the hexadecimal values of a common cathode 7-Segment display connected to a port of a microcontroller from bit 0 to bit 7. Program: #define _XTAL_FREQ 12000000 #include void main() { unsigned char value[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; unsigned char i, j; TRISC = 0x00; TRISD = 0x00; while(1) { for (i=0;i<10;i++) { PORTC=value[i]; for(j=0;j<10;j++) { PORTD=value[j]; __delay_ms(500); } } } } Result: Press the play button in Proteus Professional software and observe the counting in two seven segment displays.