How embedded systems work: the hidden computers in everyday things, and how engineers build them
Debugging firmware: how to find a bug in a device with no screen
When an app crashes on your phone, you at least see an error. When a small device goes wrong, it simply stops, or quietly starts over, and there is nothing to read. So how do engineers see inside a chip while it runs?
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Three weeks later, the first PCBs arrive. Rono fits one into a real flap, with four real batteries this time.
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Miva's cat comes, the latch clicks once, then nothing. The little light blinks as if the flap had just been switched on, and there is no screen to tell you why.
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