On Wed, Mar 14, 2007 at 04:47:32PM +0100, Rodolfo Giometti wrote:
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:
* */
--
Len Sorensen
-
