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tigard-tools / tigard

An FTDI FT2232H-based multi-protocol tool for hardware hacking
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LA and SPI headers (j6 and j4) are too close to be used by IDC-style cables at the same time. #28

Closed securelyfitz closed 3 years ago

securelyfitz commented 3 years ago

V0.1 had them far enough apart for typical IDC cables to be edge-to-edge, V1.0 shifted them over 1.5mm to make room for the stemma/qwiic connector.

Temporary Workarounds:

  1. Use the JTAG connector for spi/i2c when you want to observe
  2. or use individually crimped style instead of IDC-style connectors on the spi/i2c header
  3. reinforce with superglue, then clip 1.5mm off the edge of the 14-pin LA connector so that it fits but stays in one piece

Solution: Shift it back over 1.5mm left for next revision. Not sure if this warrants a major revision. physical layout will change but pinouts will not.

fharding1 commented 3 years ago

I don't think this necessitates a major rev either. I would consider moving one of the 2.54mm headers a major breaking change (since we have a test jig and people might make custom boards to access those pins), but not the LA header.