Super fast SPI speedup for RP2040 displays
Channel: Adafruit Industries
Date: 22/05/2021

We re-spun our STEMMA Friend design from a SAMD21 to an RP2040 to take advantage of the more-powerful chip, to make it CircuitPython-friendlier and faster at doing stuff like I2C sniffing. While porting over the Arduino code (which pretty much works just fine) we noticed the display is a little sluggish due to SPI data being sent over one byte at a time with a delay. So we're adding a bulk-transfer SPI function to the Philhower RP2040 core to take advantage of the pico-sdk's buffered writes - its now 10x faster!

#adafruit #rp2040 #pico

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