Date: Fri, 30 Apr 2021 16:22:29 +0200 From: =?utf-8?Q?Klaus_K=C3=BCchemann?= <maciphone2@googlemail.com> To: Mark Murray <markm@FreeBSD.org>, freebsd-arm@freebsd.org Subject: Re: I2C/IIC working on RPI4 8GB? Message-ID: <F38325DB-DC0E-44F8-A256-A5D6A23925D0@googlemail.com> In-Reply-To: <E9098242-5ED4-401B-9D46-E11A214A0E2F@FreeBSD.org> References: <1C2DD11C-B1F6-4C2A-9AB0-5F1553520FF5@FreeBSD.org> <20210426161138.a8f44b6e1134f73a411be57d@bidouilliste.com> <CF4C4332-BB2F-47E9-B879-8EEA0E53E848@FreeBSD.org> <C4828BF2-E8B7-45D1-B0F8-5E72AF84D565@yahoo.com> <47A634E3-4938-4AFC-9341-E480CEBF67FB@FreeBSD.org> <20210428101945.67417ef8eba251dcbcb38078@bidouilliste.com> <ED9ABBBE-9B5A-4B51-806C-F91AABE39731@FreeBSD.org> <486E3EA3-EBAE-492E-B12E-E72E3E3E7B6A@FreeBSD.org> <A10EA46D-6FE5-4FCD-895C-5A08A974D6DB@yahoo.com> <E9098242-5ED4-401B-9D46-E11A214A0E2F@FreeBSD.org>
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> On 29 Apr 2021, at 19:17, Mark Millard <marklmi@yahoo.com> wrote: >> =E2=80=A6..Looking around, I see: >=20 > https://github.com/raspberrypi/hats/blob/master/designguide.md >=20 ... > Am 30.04.2021 um 09:55 schrieb Mark Murray <markm@FreeBSD.org>: > That's a useful document, thanks, but I'm not yet making much = progress.=E2=80=A6=E2=80=A6 =E2=80=A6.. > . The pins 2/3 need to be configured to be BCM2835_FSEL_ALT0 = (FSEL[2-3]=3D4), and pinctrl-0 is 0x17, but that doesn=E2=80=99t seem to = help register GPFSEL0 fields FSEL3(11:9) and FSEL(8:6). >=20 >=20 > Mark R V Murray yet another useful document(at least that's what I hope to fix your = usecase) : = https://www.raspberrypi.org/documentation/configuration/config-txt/gpio.md= K.=
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