Chapter 3 of the RP2040 datasheet is all about PIO, but it may not be the best wy to learn: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf https

Chapter 3 of the RP2040 datasheet is all about PIO, but it may not be the best wy to learn: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.p... I find the Pico SDK examples useful to learn, but it requires that you already have a good understanding of the instructions and the protocol that it implements. Here's the I2C PIO program, for example: https://github.com/raspberrypi/pico-examples/blob/master/pio/i2c/i2c.pio https://github.com/raspberrypi/pico-examples/blob/master/pio....