Merge Sort with C - PIC16F877

Detailed specifications of the program

Input

The input is taking from the keypad matrix based on PORTB by pressing on

1	2	3
4	5	6
7	8	9
*	0	#

Note:

• Input 4 numbers (you can change it by changing the array size in the code).
• To input a number you have to enter it digit by digit then press #

Program starts to enter number 1, when you hit "5" on the keypad now number 1 have "5". To end editing in number 1 hit "#" and it will appear on the screen.

Now you have to enter number 2, hit "6" so number 2 is equal to "6".
Now hit "6" again so number 2 is equal "66" now.
Hit "#" to end editing and it will appear on the screen.

Now you have to enter number 3, hit "1" so number 3 is equal to "1".
Now hit "9" so number 3 is equal "19" now.
Hit "#" to end editing and it will appear on the screen.

Now you have to enter number 4, hit "1" so number 4 is equal to "1".
Hit "#" to end editing and it will appear on the screen.

Output

The output can appear on 7 Segment Display based on PORTD(Data Port) & PORTA(Control Port).
The number will appeared sorted with delay between them.

Program Properties

List of the used resources

•  Laptop with windows platform.
•  MPLAB X IDE v1.70 for developing.
• PIC Simulator IDE for simulating PIC16F877 microcontroller.
• Keypad Matrix
• 7 Segment Display
• PIC C Language.

Keypad Matrix configuration

7 Segment Display configuration

Download code here.