Date: Thu, 23 Mar 2017 13:01:14 -0500 From: Karl Denninger <karl@denninger.net> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: i2c on Pi3? Message-ID: <843bbe39-0b74-0d27-598d-ae16aea52a37@denninger.net> In-Reply-To: <20170323175342.GA55627@bluezbox.com> References: <0b83d41a-1a9e-28cc-6ecd-03e6a63a06a2@denninger.net> <DAC58CC9-9D1C-483F-B748-3BD20A8245CE@thehowies.com> <f1c3c4bb-976c-05ba-24ec-212bc9412a33@denninger.net> <20170323175342.GA55627@bluezbox.com>
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[-- Attachment #1 --] On 3/23/2017 12:53, Oleksandr Tymoshenko wrote: > Karl Denninger (karl@denninger.net) wrote: >> On 3/23/2017 12:34, John Howie wrote: >> >>> Hi Karl, >>> >>> I can only speak to the Raspberry Pi 2 kernel, but I2C is supported. For an example how to use it from userland, check out a project I posted on github eighteen months ago, that was for the PiFace RTC. >>> >>> https://github.com/jhowie/FreeBSDPiFaceRTC >>> >>> There are useful routines I created for working with devices on the I2C bus, which you are free to use. They are not RPI2-specific, so they should work on other boards. > .. skipped .. >> It works on the Pi2; I am using it in production. >> >> The driver appears to be /missing /in the Pi3 kernel. > Probably it's not enabled in DTB. Try adding this line to config.txt: > > dtparam=i2c_arm=on,spi=on > Nope, already in the base config.txt file: arm_control=0x200 dtparam=audio=on,i2c_arm=on,spi=on dtoverlay=mmc dtoverlay=pi3-disable-bt device_tree_address=0x4000 kernel=u-boot.bin -- Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ [-- Attachment #2 --] 0 *H 010 `He 0 *H \0X0@=0 *H 01 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA0 161218194535Z 211217194535Z0W1 0 UUS10UFlorida10U Cuda Systems LLC10Ukarl@denninger.net0"0 *H 0 ͍fd`1ie6";fSz`5¹/?{=Ӵowj ħ_fnӴMG\ҢҖ4ib}>@mJo&m M; Q9U cj] p퐆W.2E= ^¢tzĄ'5i7_ `~#dY `]R]N%R}EXzqV@[oN T>5AwYˡA "\v&YG]+($p:M,T?=mJkMљg*ym L! J[./d?W^LysD'1 +V'~{-SSX = q-f=%&V<m4 BeSet| l2m 6iO{wv + aH Xˈ5=~é*C!?uJr3tb' 3`Oe)üLxt&3N526 llU .|Cp[l? 007++0)0'+0http://cudasystems.net:88880 U 0 0 `HB0 U 0, `HB OpenSSL Generated Certificate0 U /Zi 0GhG0 U #0$q}ݽʒm50 U 0karl@denninger.net0 *H b% X% gwq Ɂэr K[DMJ35W6 sz8d|qB2Cyw2PbV} â[!W{HD7oD.TZ'w6~g( -,]R8P{*[f<1=7 jGj9铚~3f2AʺN k~@vz^j(>ͺyh2y { /9}4.45#S|<fW!.,Bss*Q+h =}l@ "q "M&6J5*,G {hɫjbNgǠ.ЃXȶ4$O.5evHlZba!4eE!x|Za1nZ5TuPvW|#G+ DZpI7S'n0 haGa@vZ e|]Cu+))vRyY10001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA=0 `He M0 *H 1 *H 0 *H 1 170323180118Z0O *H 1B@)HaohnZgJ "Km "ӆ,@>zī~& e&չT6Tz0l *H 1_0]0 `He*0 `He0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA=0 *H 101 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA=0 *H ӿz B M)O굎rf C8>p-9$2}:$Rmx{M(gC¯߄r"1#zJɐI}ga) ʉSesS[ 6㷅( =N{"՜RLiUÀKHZr7&^=U_˘2ӭ9hH8W#H$SK4x{[ &9? gY` m7nF1y"$VNm1]8U|E!7F!"Ųڌ-nRK#E?}1)tp&~މn[dIq~@KcñV[ yxl}q[W{hg:[m'"^ H)<G,h9 <QU`79eW)l"x+/B/r` )*VQ'JPNY3V[l O,mp~mCCcXḐ-ߦy;b^g~Ty!蜛 c%՟+;_ S
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