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COUNTDOWN TIMER: 7 segment display with PIC16F877 in C

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sbhatty

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I need a C code for a countdown timer in MPLAB. It is implemented by using 4 seven segment displays (CD5462A/B). I am using HI-TECH Software for this purpose.
There are 5 buttons. Start, Pause, Reset. The two remaining will function as follows:
If buttonA is pressed once, the counter will increment by 1. If buttonB is pressed the counter will increment by 10.
Once the user has pressed the buttons for the amount of time he needs to count down, he will press start and the counter will run. He may press pause in between and he may reset the timer.
Please please help soon as my deadline is tomorrow. Any help will be much appreciated!!!
 

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