Date: Thu, 3 Mar 2016 19:57:20 +0100 From: =?utf-8?Q?Peter_Ankerst=C3=A5l?= <peter@pean.org> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: PPS input on a generic GPIO pin on Raspberry Pi. Message-ID: <8C90C80B-AC5F-4B12-8E84-84193B8C55C4@pean.org>
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[-- Attachment #1 --] Hi! I have sort of exactly the same question as Erik: http://lists.freebsd.org/pipermail/freebsd-questions/2014-July/259055.html I have bought a https://learn.adafruit.com/adafruit-ultimate-gps and want to use the PPS output to discipline my clock. But the only source of information on how PPS works in FreeBSD I could find is this: https://docs.freebsd.org/doc/8.0-RELEASE/usr/share/doc/ntp/pps.html and it clearly states the two ways to provide a PPS signal. "The PPS signal can be connected in either of two ways: via the data carrier detector (DCD) pin of a serial port or via the acknowledge (ACK) pin of a parallel port” Since the Pi doesn’t have any DCD pin i would like to use a generic GPIO for this. There is a linux kernel module for this: http://lxr.free-electrons.com/source/drivers/pps/clients/pps-gpio.c?v=3.6 [-- Attachment #2 --] 0 *H 01 0 + 0 *H 00ʠk} Q Y0 *H 0}1 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1)0'U StartCom Certification Authority0 151216010005Z 301216010005Z0u1 0 UIL10U StartCom Ltd.1)0'U StartCom Certification Authority1#0!UStartCom Class 1 Client CA0"0 *H 0 }â}[[_ u$Wy5 |̔ vnqY)\aL$dYG|B"QǤĩVD#'F k9O_]*ςz_kU.u3r #:C<ogT )K Xah8v[\KqdlO)3+u7J5";[vfL/"2ϩJ# 4ד[U TB,a˖a 7H< =q d0`0U 0 U %0++0U 0 02U +0)0'%#!http://crl.startssl.com/sfsca.crl0f+Z0X0$+0http://ocsp.startssl.com00+0$http://aia.startssl.com/certs/ca.crt0 U $l9aIF+('Hmh0 U #0N @[i04hCA0?U 80604U 0,0*+ http://www.startssl.com/policy0 *H [#'#4pnR ۡЗN⛭`]K"#H*߷Թψ;UA8 Ҟeg{ozmYE60A )wXRK6c^-Al^ k[':G=;oLv{$B5;8b,ZP4{o[-j m)[땭[4 s.c|ҴvYLJ<|ӯgu0jD2 @hl+:j\ze_ևa@HyMHINxpK?% 㤺RC:=?^&7m´) A2;E~V B1$EvcKj؝(OoپU`"$a;ҡj0$&<$ۊ+/xjzb,7}W*1ܺ tDv#8K %^P>/i?)yRuQg^z`~sP900Ϡ Fs< އ.d0 *H 0u1 0 UIL10U StartCom Ltd.1)0'U StartCom Certification Authority1#0!UStartCom Class 1 Client CA0 160126171844Z 170126171844Z0810U peter@pean.org1 0 *H peter@pean.org0"0 *H 0 ] @4JahQ |DHjk X VA[,5-7d͂?y&AIy~w5@TOW|o} .of w JL͙ ѵU*Rk/2UmF!`mnRglw-6*i #A/:Mk lj],0-5@ģu*W1|1TLEpYa ;%}Vf`굫N/IX r)ϴJөgFJ*C"K@rbdȓd]IaT wbv,h UK% i,\zGͷ#?j_9Oa0@'|)|0b_Th: <P!c Y2t^H|YX|t@m e 0~\R =VќX]C=gڝ4DgΠ{L=9bY{<m[v8d 00 U 0 U %0++0 U 0 0 U 4AfQ)` 0 U #0$l9aIF+('Hmh0o+c0a0$+0http://ocsp.startssl.com09+0-http://aia.startssl.com/certs/sca.client1.crt08U 10/0-+)'http://crl.startssl.com/sca-client1.crl0U 0peter@pean.org0#U 0http://www.startssl.com/0FU ?0=0; +70,0*+ http://www.startssl.com/policy0 *H [3N݉Y`?jȧW;s 7 Az)_ѯA5ayCoE z%(wR7j"W U5p&Fx/}'1 Y!BM=)%.DrQ̳!\qU 1{\[$R c҃N^.\"- b4 2uFs"b~FٿRϨISm A .@?6k{fZw1N0J00u1 0 UIL10U StartCom Ltd.1)0'U StartCom Certification Authority1#0!UStartCom Class 1 Client CA Fs< އ.d0 + 0 *H 1 *H 0 *H 1 160303185720Z0# *H 1 oh@ovgh0 +7100u1 0 UIL10U StartCom Ltd.1)0'U StartCom Certification Authority1#0!UStartCom Class 1 Client CA Fs< އ.d0 *H 10u1 0 UIL10U StartCom Ltd.1)0'U StartCom Certification Authority1#0!UStartCom Class 1 Client CA Fs< އ.d0 *H IŇri0X$k WV7/|qHDxjĦc9W7S0 "i7/q_Yڋ,+u"z t*soAdu5-"ie~<PZ v7dO?E}Xa&4x$:C QM-ѽQz3 Vlp Q/1?R 53c 9Bb{D`|kht t`5$졸.`{09E\jSt0nj x1f|22u>e8py 1p%f+ Td?|J7Y0bҊM k a4˒δvbnkr\@3%^ZAn '(@t3~U{M;yp V !EY푒(V`ѥ8MvDգƿT2_?>{TՏ9îm p/j#
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