We've been working on porting a stepper control core to work as a wishbone peripheral on the ZPUino. To help us out with this process Alvie put together a really cool wishbone testbench that lets us simulate the core by manually writing to the wishbone registers. This is a very lightweight solution that lets you verify your wishbone peripherals without the overhead of simulating or synthesizing the full ZPUino Soft Processor!
The code is located on github.
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