Introduction - If you have any usage issues, please Google them yourself
Project: Measuring heart rate through fingertip
Copyright @ Rajendra Bhatt
January 18, 2011
PIC16F628A at 4.0 MHz external clock, MCLR enabled
sbit IR_Tx at RA3_bit
sbit DD0_Set at RA2_bit
sbit DD1_Set at RA1_bit
sbit DD2_Set at RA0_bit
sbit start at RB7_bit
unsigned short j, DD0, DD1, DD2, DD3
unsigned short pulserate, pulsecount
unsigned int i
// Function to Return mask for common anode 7-seg. display
unsigned short mask(unsigned short num) {