Testing and Programming

The best way to program this project is in three pieces:

Test the 4×4 matrix keypad alone using the example Blockly code.
Test the 7-segment display alone using the example Blockly code.
If both of the above were successful, program the entire project!

Download the 4×4 Matrix Keypad Test code below, then open and run it with BlocklyProp Solo.

To make sure every part is working separately before synthesizing all of it, run the main loop with the keyNumber variable. This will ensure that the 4×4 matrix keypad is wired correctly and working as intended. Below is an example of what the terminal should display – in this case the number 9 is being pressed.

Next, test the seven-segment display by loading the Blockly code for the Seven-Segment Display Test:

This will cycle through numbers 0-9 in an endless loop.

If the 4×4 matrix keypad and seven-segment display codes worked successfully, then you’re ready to run the Blockly code for the 4×4 Matrix Keypad with Seven-Segment Display (shown in full below):

Project8331-4×4-Keypad-7-Seg-Display.svg