ePaper Driver Board for Seeed Studio XIAO

Products & Technology XIAO
9

I’m afraid my discovery was shortsighted. After 6 hours of debugging with another SW engineer, we found:

  1. While the V2 board is able to display “something” with a slower SPI clock, the image is not robust. It is patchy. When rendering a full black screen, it looks black on the V1 board, but like static noise on the V2. I still cannot attach photos, else I could share an image. Swapping the displays between the boards results in the same outcome, so it is not a faulty display.

  2. The V2 board will display nothing when the SPI frequency is set to below 20,000 or above 200,000 (approximately), both of which are well below the example-set speed of 10,000,000.

Since all 6 V2 boards in my possession behave the same way, this appears to be a hardware issue with the V2 board. How can this be investigated and resolved?

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