The Raspberry Pi does not really need an introduction: Linux plus some tinkering pins - who could possibly ask for more? It has all the features needed to create a flexible and powerful programming / debugging tool for microcontrollers. It can even run entire toolchains for cross-compiling for a wide variety of these µCs.
One tricky aspect, which is probably the main stumbling block if you’ve ever looked into trying out things with a 32-bit ARM-based µC, is how to get the software onto those chips.
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