1 Example: Driving Seven Segment Display Schematic Easypic 4 ...

Schematic
Task:
Example: Driving Seven Segment Display
EasyPic 4 Board
1
P. Klimo September 2009
Drive a single digit Seven Segment display, displaying digits between 0 and 9 at 1 second
interval.

Flow Diagram:
2
P. Klimo September 2009

CODE
3
P. Klimo September 2009
/* File: 7SegDisplay_1D.c
Description:
Displays a digit on single 7-segment display. Segments connected to PORTD ( segment A to RD0,
segment B to RD1, etc); Common cathode is connected to the pin RA1 on PORTA. Incremented every 1s.
* Test configuration: MCU: P16F877A Dev.Board: EasyPIC4
Xtal: HS, 8 MHz SW: PICC.0 */
#include /* HI-tech compiler definitions */
/* PIC configuration: HS oscillator, Watch Dog Timer off, Browning Effect off, Low Voltage Mode off */
__CONFIG(HS&WDTDIS&PWRTDIS& BORDIS&LVPDIS ); // HiTec Pragmas
void Delay_ms(int ms); // Delay routine
unsigned short SendCode(unsigned short num); // Convert binary to seven segment code
unsigned short count; // Display value
void main()
{ // Initialize Ports
PORTA = 0; // Configure bit 1 of Port A as output
TRISA = 0xfd; // by clearing bit 1 in the TRISA register
PORTD = 0; // Configure all bits of Port D as outputs
TRISD = 0; // by clearing the TRISD register
do { // Proceed incrementing the displayed digit from 0 to 9
for (count = 0; count0){
for (i=0; i< Xtal_Freq; i++){;}
count--;
}