[riot-notifications] [RIOT-OS/RIOT] cpu/rpx0xx: port RIOT to the Raspberry Pi RP2040 MCU (#16609)

Marian Buschsieweke notifications at github.com
Thu Jul 8 09:19:38 CEST 2021

@maribu commented on this pull request.

> +![Pinout Diagram of RPi Pico](https://projects-static.raspberrypi.org/projects/getting-started-with-the-pico/f009ad94826c2f0cd7573a295897e76955301096/en/images/Pico-R3-Pinout.png)
+## Flashing the Board
+### Flashing the Board Using OpenOCD
+Currently (June 2021), only two methods for debugging via OpenOCD are supported:
+1. Using a bit-banging low-level adapter, e.g. via the GPIOs of a Raspberry Pi 4B
+2. Using a virtual CMSIS-DAP adapter provided by the second CPU core via
+   https://github.com/majbthrd/pico-debug
+Since option 2 requires no additional hardware, this is currently the default. However, you need to
+first "flash" the gimme-cache variant of [pico-debug](https://github.com/majbthrd/pico-debug)
+into RAM using the UF2 bootloader. This will result in the Raspberry Pi Pico showing up as
+CMSIS-DAP debugger. Afterwards run:

OK, the upstream docu sucks in this regard. I'll add a sentence here.

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