I’d like to use the Adafruit SDIO SD breakout with the Tufty2040. The pads on the back have SWC and SWD, but I’m wondering if I can repurpose INT as a data pin. Is i2c_int doing something important on the Tufty2040?
Responding to my own post: I tried it, it’s not practical.
- SWD and SWC are dedicated programming pins, you can not repurpose them
- The rest of the pins do expose SPI0 pins however…
- SPI0 SCK is connected to the LCD backlight control pin on GPIO2, and the only other pin it can be mapped to is also in use by the LCD 8-bit interface
- To use GPIO2 you would have to cut very small traces and re-route SCK to the SD card adapter and then map either the RX or SCL pad to the backlight control pin
tl;dr don’t buy a Tufty2040 if you need to use an SD card.