On 12/18/2016 09:13 PM, Gene Heskett wrote: > Update: In an effort to identify all the grounds available on the pi's > 40 pin gpio header, I went the their site at > > <https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/> > > Which they claim also aplies to the 3b's, and found that there are 2 std > ways of numbering the pins!!! Such idiocy should cause the author of > such to be first against the wall, but its done and published and I > can't change it. > > The signals don't physically move, but the pins aren't numbered in the > usual > 2 4 6 8 10 12 etc to 40 > 1 3 5 7 9 11 etc to 39 sequence I've been looking at since the first > dil connector I ever saw on a scsi-ii cable in the 80's. > > But this web page does not get to using that common sense pin numbering > sequence until page 4 of the printed copy! This has to have an excedrin > headache number defined someplace... > > So my question is, which numbering sequence is in use for the published > SPI interconnection drawings I am working from? I *think* I got this > printout from Matsche.
The first image: https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/images/gpio-numbers-pi2.png These are the GPIO numbers connected to the pins. The numbers are not pin header numbers. The second image is in appendix 1 under the header "Physical numbering": https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/images/physical-pin-numbers.png The physical numbering is exactly as you would expect. If you want both numbering schemes and the signal, then you can, for example, look at: https://www.element14.com/community/servlet/JiveServlet/previewBody/68203-102-6-294412/GPIO.png -- Greetings Bertho (disclaimers are disclaimed) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
