Unit testing patterns for microcontroller C code

Question

Although there are plenty of unit test frameworks that support C, I\'m a little stumped on how to write unit tests for micro controller code (PIC in my case, but I think the

Answer 1

One approach to this might be to use an emulator. I've been working on an AVR emulator and one of the ideas for using it is indeed to unit test code. The emulator implements the CPU and registers, interrupts and various peripherals, and (in my case) bytes written to the emulated UART go to the regular stdout of the emulator. In this way, unit test code can run in the emulator and write its test results to the console.

Of course, one must also ensure that the emulator is correctly implementing the behaviour of the real CPU, otherwise the unit tests on top of that can't be trusted.