Messages in this thread | | | Date | Wed, 14 Mar 2007 16:57:32 -0400 | Subject | Re: [PATCH 1/1] LinuxPPS: Pulse per Second support for Linux | From | (Lennart Sorensen) |
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On Wed, Mar 14, 2007 at 04:47:32PM +0100, Rodolfo Giometti wrote: > On Wed, Mar 14, 2007 at 11:37:05AM -0400, Lennart Sorensen wrote: > > Well here is my current version of the refclock_nmea.c.patch for > > LinuxPPS. It now uses /dev/gps# for the nmea messages and /dev/pps# for > > the PPS device (which in my case is of course the same device). I am > > running some more tests on it, but I think it is OK. > > Thanks, published. :)
Well it does work for our GPS receiver at least. Of course I have to change the baud rate in the driver since our unit doens't use the NNEA standard 4800. And the configure script for ntp doesn't recognize the v2 PPSAPI, so I have to manually explain to it that I have the PPS API and it should actually include it.
Here is my utility for enabling PPS on my serial port now. Seems less of a pain that patching setserial and including that (with 256MB flash space, setserial seems wasteful).
ppsctl.c -------- #include <sys/ioctl.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <stdio.h> #include <string.h> #include <linux/serial.h>
void usage(char *name) { fprintf(stderr,"Usage: %s /dev/port [0|1]\n",name); fprintf(stderr,"Where 0 means disable PPS and 1 means enable PPS\n"); }
int main(int argc, char *argv[]) { int fd; char *state;
if(argc<3) { usage(argv[0]); return 1; } fd = open(argv[1],O_RDWR); if (fd>=0) { struct serial_struct ss; if (ioctl(fd, TIOCGSERIAL, &ss) < 0 ) { perror("TIOCGSERIAL"); return 1; } else { if(strcmp(argv[2],"1")==0) { ss.flags |= ASYNC_HARDPPS_CD; state="enabled"; } else if(strcmp(argv[2],"0")==0) { ss.flags &= ~ASYNC_HARDPPS_CD; state="disabled"; } else { fprintf(stderr,"Invalid state argument \"%s\"\n",argv[2]); return 1; } if (ioctl(fd, TIOCSSERIAL, &ss) < 0) { perror("TIOCSSERIAL"); } else { fprintf(stderr,"PPS on %s is now %s\n",argv[1],state); } } } else { fprintf(stderr,"Can't open \"%s\":",argv[1]); perror(""); } return 0; }
/* vim:ts=4:shiftwidth=4: * */
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