Subj : Re: RP400 40-pin connector To : invalid@invalid.invalid From : John Larkin Date : Sun Aug 11 2024 13:59:36 XPost: sci.electronics.design On Sun, 11 Aug 2024 16:22:04 -0400, "Edward Rawde" wrote: >"John Larkin" wrote in message news:d21ibjdvt6odqium3ado62ob1e7sa6n9hc@4ax.com... >>I want to use an Raspberry Pi 400 (the keyboard thing) as the >> dev/debug system for an RP2040 based product. >> >> https://www.amazon.com/Raspberry-Computer-Keyboard-Layout-Kabel/dp/B08QCQVWH2 >> >> It has a 40-pin connector on the back. Various sources say that pins 1 > >This connector? >https://www.pi4j.com/1.3/images/pi4j-rpi-400-pinout.png Yes. > >> 3 and 5 are either GPIO ports 8 9 and 7 or maybe 2 3 and 4. >> >> Sometimes the pins are labeled WPI and BCM. Wot's that? >> >> https://www.amazon.com/Coolwell-Waveshare-Raspberry-Adapter-Expansion/dp/B08RZCR7S8 > >If that's just a connector then continuity check it to the above drawing of the connector on the Pi. The real question is whether pin 3 is GPIO8 or GPIO2, and which two pins are the SW debug. On the Pi4, pin 3 is GPIO2. It seems like the pins are renamed on the Pi 400, where pin 3 is GPIO8. Why would they do that? --- SoupGate-Win32 v1.05 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3) .