Was I fucking drunk when I designed this board? I completely missed 2 GPIOs to control a LED and a switch on the schematic, and I used the wrong SERCOM for the I2C lines which means I now need to swap SCL and SDA.
So, I think I can rescue it using 4 bodge-wires. One bodge-wire between the QFP pin lead and a SOT-23 MOSFET gate, one between the QFP pin lead and 1 of 3 0402 size pads all next to each other. The I2C lines are a bit trickier, because I could go track to track across a cut and make my own pads from the track ends, or via to via across the same cut but longer bodge-wires
Right back to it today. Last 2 bodges to swap UART TX and RX lines. I’ll have to attach to traces this time, luckily the other end are a pair of giant test pads
And works at 400kHz, which is as fast as the RTC goes. The LED bodge wire also works! And, uh, I think I melted the button that has the bodge attached… again
@jpm Super cheap kiddie sunglasses from a two-dollar shop, and cut out little filters for the LEDs. Or use something completely opaque and put a pinhole in it.
Nope, vendor-code issue. Who would have thought that zero of three i2c devices I’m using like having a re-start issued in the middle of their write sequence?
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