On Wed, Mar 14, 2007 at 04:57:32PM -0400, Lennart Sorensen 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.
Can you please provide a little help about it? A patch against current
wiki wuold be great! ;)
> 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).
I modify your code add inquiry functionality. Can you please test it?
See http://ftp.enneenne.com/pub/misc/linuxpps/test/ and the wiki at
http://wiki.enneenne.com/index.php/LinuxPPS_support#Compiling_the_code.
Ciao,
Rodolfo
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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <linux/serial.h>
void usage(char *name)
{
fprintf(stderr, "usage: %s <ttyS> [enable|disable]\n", name);
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
int fd, ret;
struct serial_struct ss;
if (argc < 2)
usage(argv[0]);
fd = open(argv[1], O_RDWR);
if (fd < 0) {
perror("open");
exit(EXIT_FAILURE);
}
ret = ioctl(fd, TIOCGSERIAL, &ss);
if (ret < 0 ) {
perror("ioctl(TIOCGSERIAL)");
exit(EXIT_FAILURE);
}
if (argc < 3) { /* just read PPS status */
printf("PPS is %sabled\n",
ss.flags & ASYNC_HARDPPS_CD ? "en" : "dis");
exit(EXIT_SUCCESS);
}
if (argv[2][0] == 'e' || argv[2][0] == '1')
ss.flags |= ASYNC_HARDPPS_CD;
else if (argv[2][0] == 'd' || argv[2][0] == '0')
ss.flags &= ~ASYNC_HARDPPS_CD;
else {
fprintf(stderr, "invalid state argument \"%s\"\n", argv[2]);
exit(EXIT_FAILURE);
}
ret = ioctl(fd, TIOCSSERIAL, &ss);
if (ret < 0) {
perror("ioctl(TIOCSSERIAL)");
exit(EXIT_FAILURE);
}
return 0;
}
