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Show Notes
The lil STEMMA Friend board we're working on this weekend could also be a cute lil UART/Serial monitor tool. the RP2040 has a fast enough GPIO peripheral that we can automatically detect baud rates and then turn on the UART peripheral to read data via an IRQ into a buffer. To get the nice scrolling effect (with a header at the top that doesn't scroll!) we have to use a framebuffer - thankfully the RP2040 also has enough RAM to buffer a full 240*240 pixels. we read the serial data and draw to the framebuffer in the IRQ and draw to the TFT itself in the main loop. We're testing it here with a 9600 baud GPS but it also works with a Raspberry pi. Maybe VT10x color coding is next?
#adafruit #stemma #uart
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