[SOLVED] Project 1 Test Bench for Calculator

Project 1 Test Bench for Calculator

Project 1 Test Bench for
Calculator

Digital Systems Design

2016

Professor Jonathan H. Manton

Notes

To test your calculator, you can use and modify TestCalc.v
Online repository: Lab Notes/Project 1

Only looks at CPU pins
Does not test debounce, Disp2cNum etc

To make it more convenient, use the following code before testing for
which button is pressed in your ROM
h10: data = set(`FLAG, 0);

h11: data = jz(`FLAG, h11);

Now use ATC

Jump back to 10 when finished current operation

Example of Test Signals

Example of Output (ModelSim Transcript)

Some More About the Test Bench

Explanations

Use tasks to make writing the Test Signals easy

Fork Join simply runs things in parallel
No need to do this, but I wanted exactly a delay of 50 cycles for each

operation

If your code needs more than 50 instructions for any operation (push, pop, )
Increase the delay

(or improve your code!)

Comments

You can print out IP in either decimal or hexadecimal
Depends on how you wrote addresses in your ROM

10:

h10:

In principle, you can add if statements to the test bench to check that
the calculator is producing the correct results
Automated test benches

Prints message and stops when it finds an error

You can write other test benches to test the other parts of Part 1
Debounce, Disp2cNum,