LinuxPPS support (old APIs)

netlink layer

giometti@zaigor:~$ git clone git://git.enneenne.com/linuxpps

giometti@zaigor:~$ git pull git://git.enneenne.com/linuxpps

git checkout -b linuxpps 

git pull git://git.enneenne.com/linuxpps master

git clone --reference /path/to/linux/clone 

giometti@zaigor:~$ git pull git://git.enneenne.com/linuxpps

giometti@zaigor:~/linux-2.6.21$ patch -p1 < ntp-pps-2.6.21.diff

        <M> PPS support                                                       
        [ ]   PPS debugging messages                                          
        ---   PPS clients support                                             
        <M>   Kernel timer client (Testing client, use for debug)             
        [*]   UART serial support                                             
        [*]   Parallel printer support                                        

        [*] Prompt for development and/or incomplete code/drivers             
        [*]   Select only drivers expected to compile cleanly (NEW)   

        <M> PPS support                                                       
        [*]   PPS debugging messages                                          
        ---   PPS clients support                                             
        <M>   Kernel timer client (Testing client, use for debug)             
        ---   UART serial support (forced off)                                
        ---   Parallel printer support (forced off)                           

giometti@zaigor:/usr/include# mv linux linux.old
giometti@zaigor:/usr/include# mv asm asm.old
giometti@zaigor:/usr/include# mv asm-generic asm-generic.old
giometti@zaigor:/usr/include# ln -s /lib/modules/$(uname -r)/build/include/linux .
giometti@zaigor:/usr/include# ln -s /lib/modules/$(uname -r)/build/include/asm .
giometti@zaigor:/usr/include# ln -s /lib/modules/$(uname -r)/build/include/asm-generic .

giometti@zaigor:~/linuxpps/test$ make
cc -Wall -O2 -D_GNU_SOURCE -M ppstest.c ppsctl.c > .depend
cc -Wall -O2 -D_GNU_SOURCE    ppstest.c   -o ppstest
cc -Wall -O2 -D_GNU_SOURCE    ppsctl.c   -o ppsctl

--- setserial.c.old	2007-02-17 08:47:45.000000000 +0100
+++ setserial.c	2007-02-17 08:57:26.000000000 +0100
@@ -127,6 +127,7 @@
 	CMD_FLAG,	"hup_notify",	ASYNC_HUP_NOTIFY, ASYNC_HUP_NOTIFY, 0, FLAG_CAN_INVERT,
 	CMD_FLAG,	"skip_test",	ASYNC_SKIP_TEST,ASYNC_SKIP_TEST,2, FLAG_CAN_INVERT,
 	CMD_FLAG,	"auto_irq",	ASYNC_AUTO_IRQ,	ASYNC_AUTO_IRQ,	2, FLAG_CAN_INVERT,
+	CMD_FLAG,	"hardpps",	ASYNC_HARDPPS_CD, ASYNC_HARDPPS_CD, 0, FLAG_CAN_INVERT,
 	CMD_FLAG,	"split_termios", ASYNC_SPLIT_TERMIOS, ASYNC_SPLIT_TERMIOS, 2, FLAG_CAN_INVERT,
 	CMD_FLAG,	"session_lockout", ASYNC_SESSION_LOCKOUT, ASYNC_SESSION_LOCKOUT, 2, FLAG_CAN_INVERT,
 	CMD_FLAG,	"pgrp_lockout", ASYNC_PGRP_LOCKOUT, ASYNC_PGRP_LOCKOUT, 2, FLAG_CAN_INVERT,
@@ -725,6 +726,7 @@
 	fprintf(stderr, "\t^ fourport\tconfigure the port as an AST Fourport\n");
 	fprintf(stderr, "\t  autoconfig\tautomatically configure the serial port\n");
 	fprintf(stderr, "\t^ auto_irq\ttry to determine irq during autoconfiguration\n");
+	fprintf(stderr, "\t^ hardpps\tmanage PPS signal when CD changes status\n");
 	fprintf(stderr, "\t^ skip_test\tskip UART test during autoconfiguration\n");
 	fprintf(stderr, "\n");
 	fprintf(stderr, "\t^ sak\t\tset the break key as the Secure Attention Key\n");

giometti@zaigor:/tmp$ apt-get source setserial

giometti@zaigor:/tmp/setserial-2.17$ fakeroot debian/rules binary

giometti@zaigor:~/linuxpps$ tree /sys/class/pps
/sys/class/pps
|-- 00
|   |-- assert
|   |-- clear
|   |-- echo
|   |-- mode
|   |-- name
|   |-- path
|   |-- subsystem -> ../../../class/pps
|   `-- uevent
`-- 01
    |-- assert
    |-- echo
    |-- mode
    |-- name
    |-- path
    |-- subsystem -> ../../../class/pps
    `-- uevent

giometti@zaigor:~/linuxpps$ sudo modprobe 8250

giometti@zaigor:~/linuxpps$ setserial /dev/ttyS1 hardpps 
giometti@zaigor:~/linuxpps$ cat /sys/class/pps/02/path 
/dev/ttyS1 

giometti@zaigor:~/linuxpps$ ppsctl /dev/ttyS1 enable

giometti@zaigor:~/linuxpps$ sudo ./test/ppstest 
found PPS source #0 "ktimer" on ""
Assert timestamp: 1138812799.797267675, sequence: 477
Assert timestamp: 1138812800.797337675, sequence: 478
Assert timestamp: 1138812801.797392675, sequence: 479
Assert timestamp: 1138812802.797463675, sequence: 480
Assert timestamp: 1138812803.797522675, sequence: 481

giometti@zaigor:~/linuxpps$ cat /sys/class/pps/01/name
ktimer

giometti@zaigor:~/linuxpps$ sudo ./test/ppstest 1
found PPS source #1 "ktimer" on ""
Assert timestamp: 1139092418.968589675, sequence: 514
Assert timestamp: 1139092419.968671675, sequence: 515
Assert timestamp: 1139092420.968718675, sequence: 516
Assert timestamp: 1139092421.968785675, sequence: 517

giometti@jeeg:~$ ls -l /sys/class/pps/
drwxr-xr-x 2 root root 0 Feb 18 20:08 00/
drwxr-xr-x 2 root root 0 Feb 18 20:08 01/
drwxr-xr-x 2 root root 0 Feb 18 20:11 02/

giometti@jeeg:~$ ls /sys/class/pps/??/{assert,clear}
/sys/class/pps/00/assert  /sys/class/pps/01/assert  /sys/class/pps/02/clear
/sys/class/pps/00/clear   /sys/class/pps/02/assert

giometti@jeeg:~$ cat /sys/class/pps/01/assert
1148727816.24772000 #326
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727816.24772000 #326
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727817.24872000 #327
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727817.24872000 #327
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727818.24945000 #328
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727818.24945000 #328
giometti@jeeg:~$ cat /sys/class/pps/01/assert 
1148727819.25003000 #329

giometti@zaigor:~/ntp$ grep HAVE_PPSAPI config.h
#define HAVE_PPSAPI 1

giometti@zaigor:~/ntp$ ./configure --disable-all-clocks --disable-parse-clocks\
                                   --enable-NMEA --enable-LOCAL-CLOCK

giometti@zaigor:~/ntp$ make

server 127.127.20.0 prefer minpoll 4
fudge 127.127.20.0 flag3 1 flag2 0 time1 0.0

server 127.127.22.1 minpoll 4 maxpoll 4
fudge 127.127.22.1 flag flag2 1

giometti@zaigor:~/ntp-dev-4.2.0b-rc1-20060306$ ./configure --disable-ATOM \
--disable-JUPITER --disable-NMEA

giometti@zaigor:~/ntp-4.2.0a+stable$ make

giometti@zaigor:~$ tar xfz ntp_4.2.0a+stable.tgz
giometti@zaigor:~$ cd ntp-4.2.0a+stable/
giometti@zaigor:~/ntp-4.2.0a+stable$ patch -p1 < ../patch.cross_compiling
patching file configure.in
Hunk #1 succeeded at 26 (offset 1 line).
patching file ntpdc/Makefile.am
giometti@zaigor:~/ntp-4.2.0a+stable$ patch -p1 < ../patch.ntp-4.2.0a+stable-configure.in
patching file configure.in
giometti@zaigor:~/ntp-4.2.0a+stable$ patch -p1 < ../patch.ntp-4.2.0a+stable-refclock_ripencc.c
patching file ntpd/refclock_ripencc.c

giometti@zaigor:~/ntp-4.2.0a+stable$ aclocal && autoconf && automake

giometti@zaigor:~/ntp-4.2.0a+stable$ ./configure --enable-RIPENCC \
--disable-ATOM --disable-JUPITER --disable-NMEA

giometti@zaigor:~/ntp-4.2.0a+stable$ make

giometti@zaigor:~/linuxpps$ git diff linux-vanilla master > my_patch

giometti@zaigor:~/linuxpps$ git diff > patch_file

$ lynx --dump 'http://wiki.enneenne.com/index.php/LinuxPPS_support' > LinuxPPS.txt
$ cp LinuxPPS.txt LinuxPPS.txt.orig

$ diff -u LinuxPPS.txt.orig LinuxPPS.txt

static struct pps_source_info_s pps_ktimer_info = {
        name         : "ktimer",
        path         : "",
        mode         : PPS_CAPTUREASSERT|PPS_OFFSETASSERT|PPS_ECHOASSERT| \
                       PPS_CANWAIT|PPS_TSFMT_TSPEC,
        echo         : pps_ktimer_echo,
};

source = pps_register_source(&pps_ktimer_info,
                 PPS_CAPTUREASSERT|PPS_OFFSETASSERT,
                 -1 /* is up to the system */);

int pps_register_source(struct pps_source_info_s *info, int default_params, int try_id)

pps_event(source, PPS_CAPTUREASSERT, ptr);

+#ifdef PPS_HAVE_FINDSOURCE
+      /* Try to find the source (by using "index = -1" we ask just for a
+       * generic source) */
+      fd = time_pps_findsource(-1, path, PPS_MAX_NAME_LEN, id, PPS_MAX_NAME_LEN);
+      if (fd < 0) {
+              msyslog(LOG_ERR, "refclock: no available PPS source in the system");
+              return 1;
+      }
+      msyslog(LOG_INFO, "refclock: found PPS source #%d \"%s\" on \"%s\"", fd, path, id);
+#endif   /* PPS_HAVE_FINDSOURCE */
+
+
       if (time_pps_create(fd, &pps_handle) < 0) {
-              pps_handle = 0;
               msyslog(LOG_ERR, "refclock: time_pps_create failed: %m");
       }


+#ifdef PPS_HAVE_FINDPATH
+      /* Get the PPS source's real name */
+      time_pps_readlink(link, LENPPS, path, PPS_MAX_NAME_LEN);
+
+      /* Try to find the source */
+      fd = time_pps_findpath(path, PPS_MAX_NAME_LEN, id, PPS_MAX_NAME_LEN);
+      if (fd < 0) {
+              msyslog(LOG_ERR, "refclock: cannot find PPS source \"%s\" in the system", path);
+              return 1;
+      }
+      msyslog(LOG_INFO, "refclock: found PPS source #%d \"%s\" on \"%s\"", fd, path, id);
+#endif   /* PPS_HAVE_FINDPATH */
+
+
       if (time_pps_create(fd, &pps_handle) < 0) {
-              pps_handle = 0;
               msyslog(LOG_ERR, "refclock: time_pps_create failed: %m");
       }

giometti@jeeg:~/linuxpps$ cat /sys/class/pps/01/name
serial1 
giometti@jeeg:~/linuxpps$ cat /sys/class/pps/01/path
/dev/ttyS1 
giometti at jeeg:~/linuxpps/test$ sudo ln -sf /dev/ttyS1 /dev/gps0
giometti at jeeg:~/linuxpps/test$ sudo ./ppstest /dev/gps0
found PPS source #2 "serial1" on "/dev/ttyS1"
giometti at jeeg:~/linuxpps/test$ sudo ln -sf ktimer /dev/gps0
giometti at jeeg:~/linuxpps/test$ sudo ./ppstest /dev/gps0
found PPS source #0 "ktimer" on ""

   #ifdef HAVE_PPSAPI
  -      if (pps_handle) {
  -              time_pps_destroy(pps_handle);
  -              pps_handle = 0;
  -      }
  +      time_pps_destroy(pps_handle);
   #endif /* HAVE_PPSAPI */

      if (up->handle != 0)
              time_pps_destroy(up->handle);

      time_pps_destroy(up->handle);

[ntpd] refclock_nmea: time_pps_kcbind failed: Operation not supported

pps_core: capture assert seq #292 for source 0
8250: serial8250: PPS assert event at 420817

pps_core: capture clear seq #292 for source 0
8250: serial8250: PPS clear event at 420942

pps_core: New message from PID 5205 (flags 0)
pps_core: PPS_FETCH: source 0


Reference clock	Driver	Contact	PPS source	Docs	Patches
Generic NMEA GPS Receiver (`nmea`)	20	Udo van den Heuvel	`pps_8250`	NTPD driver 20	here for ntp-4.2.0.a.20050816-14
Atom PPS Clock Discipline (`atom`)	22	linux at horizon dot com	`pps_8250`	NTPD driver 22	here for ntp-4.2.2+dfsg.2
Motorola Oncore GPS receiver (`oncore`)	30	Reg Clemens	`pps_8250`	NTPD driver 30	none for ntp-dev-4.2.0b-rc1-20060306 or later
RIPE NCC interface for Trimble Palisade (`ripencc`)	43	Rodolfo Giometti	`pps_mpc8xx`	NTPD driver 43	here for ntp-4.2.0a+stable

LinuxPPS support (old APIs)

From EnneEnneWiki

Contents

Introduction

Data and Performance Monitoring

Getting help

Downloading the code

Cloning my repository

Merging my repository with your current Linux Vanilla one

Using a patch

Compiling the code

The kernel code

The userland tools

`ppstest` and `ppsctl`

`setserial`

Checking the new system

`NTPD support`

Generic NMEA GPS Receiver (`refclock_nmea` - driver 20)

Installation

Note

Atom PPS Clock Discipline (`refclock_atom` - driver 22)

Installation

Note

Motorola Oncore GPS receiver (`refclock_oncore` - driver 30)

Installation

Note

RIPE NCC interface for Trimble Palisad (`refclock_ripencc` - driver 43)

Installation

Note

How to contribute

Hacking the code

Adding a new LinuxPPS source

Modifing a reference clock to work with LinuxPPS

FAQs

Views

Personal tools

Navigation

Search

Toolbox

LinuxPPS support (old APIs)

From EnneEnneWiki

Contents

Introduction

Data and Performance Monitoring

Getting help

Downloading the code

Cloning my repository

Merging my repository with your current Linux Vanilla one

Using a patch

Compiling the code

The kernel code

The userland tools

ppstest and ppsctl

setserial

Checking the new system

NTPD support

Generic NMEA GPS Receiver (refclock_nmea - driver 20)

Installation

Note

Atom PPS Clock Discipline (refclock_atom - driver 22)

Installation

Note

Motorola Oncore GPS receiver (refclock_oncore - driver 30)

Installation

Note

RIPE NCC interface for Trimble Palisad (refclock_ripencc - driver 43)

Installation

Note

How to contribute

Hacking the code

Adding a new LinuxPPS source

Modifing a reference clock to work with LinuxPPS

FAQs

Views

Personal tools

Navigation

Search

Toolbox

`ppstest` and `ppsctl`

`setserial`

`NTPD support`

Generic NMEA GPS Receiver (`refclock_nmea` - driver 20)

Atom PPS Clock Discipline (`refclock_atom` - driver 22)

Motorola Oncore GPS receiver (`refclock_oncore` - driver 30)

RIPE NCC interface for Trimble Palisad (`refclock_ripencc` - driver 43)