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Figured out problem

A project log for Skoobot

Tiny robot for Hacking and EdTech.

bill-weilerBill Weiler 03/23/2018 at 23:460 Comments

It wasn't the robot board I just made, it was a signal on the companion board. I found by injecting a signal through the analog switch and seeing if it came out, and the programming clock (swclk) wasn't getting through.  I used the calibration port on my scope as a signal generator. I then instrumented all 3 signals, swdio, reset and swclk. I fixed it by coating the analog switch with flux and touching it all around with the soldering iron (the switch is a QFN). The robot board is all hacked up from rework, so I think I'll just make a new one (tomorrow). For today I am in need of some fun after all that stress. Here is a photo of swclk finally working. It is kind of stressful. I have to spin the robot board, but I have to test everything on the old one to catch all the bugs, but it pushes the date out further and further the more time I spend debugging.

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