103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/* $NetBSD: pps-api.c,v 1.2 2003/12/04 16:23:38 drochner Exp $ */
|
|
|
|
/*
|
|
|
|
Try to run this program to see what the PPS-API finds. You give it the
|
|
device as argument and you may have to modify the pp.mode = BLA assignment.
|
|
|
|
Poul-Henning
|
|
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <err.h>
|
|
#include <sys/types.h>
|
|
#include <time.h>
|
|
#include <sys/timepps.h>
|
|
#include <sys/termios.h>
|
|
|
|
#define timespecsub(vvp, uvp) \
|
|
do { \
|
|
(vvp)->tv_sec -= (uvp)->tv_sec; \
|
|
(vvp)->tv_nsec -= (uvp)->tv_nsec; \
|
|
if ((vvp)->tv_nsec < 0) { \
|
|
(vvp)->tv_sec--; \
|
|
(vvp)->tv_nsec += 1000000000; \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
void
|
|
Chew(struct timespec *tsa, struct timespec *tsc, unsigned sa, unsigned sc)
|
|
{
|
|
static int idx;
|
|
struct timespec ts;
|
|
|
|
printf("%d.%09d ", tsa->tv_sec, tsa->tv_nsec);
|
|
printf("%d.%09d ", tsc->tv_sec, tsc->tv_nsec);
|
|
printf("%u %u ", sa, sc);
|
|
|
|
ts = *tsc;
|
|
timespecsub(&ts,tsa);
|
|
printf("%.9f ", ts.tv_sec + ts.tv_nsec / 1e9);
|
|
printf("\n");
|
|
fflush(stdout);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int fd;
|
|
pps_info_t pi;
|
|
pps_params_t pp;
|
|
pps_handle_t ph;
|
|
int i, mode;
|
|
u_int olda, oldc;
|
|
double d = 0;
|
|
struct timespec to;
|
|
|
|
if (argc < 2)
|
|
argv[1] = "/dev/cuaa1";
|
|
setbuf(stdout, 0);
|
|
fd = open(argv[1], O_RDONLY);
|
|
if (fd < 0)
|
|
err(1, argv[1]);
|
|
i = time_pps_create(fd, &ph);
|
|
if (i < 0)
|
|
err(1, "time_pps_create");
|
|
|
|
i = time_pps_getcap(ph, &mode);
|
|
if (i < 0)
|
|
err(1, "time_pps_getcap");
|
|
|
|
pp.mode = PPS_CAPTUREASSERT | PPS_ECHOASSERT;
|
|
pp.mode = PPS_CAPTUREBOTH;
|
|
/* pp.mode = PPS_CAPTUREASSERT; */
|
|
|
|
i = time_pps_setparams(ph, &pp);
|
|
if (i < 0)
|
|
err(1, "time_pps_setparams");
|
|
|
|
while (1) {
|
|
to.tv_nsec = 0;
|
|
to.tv_sec = 0;
|
|
i = time_pps_fetch(ph, PPS_TSFMT_TSPEC, &pi, &to);
|
|
if (i < 0)
|
|
err(1, "time_pps_fetch");
|
|
if (olda == pi.assert_sequence &&
|
|
oldc == pi.clear_sequence) {
|
|
usleep(10000);
|
|
continue;
|
|
}
|
|
|
|
Chew(&pi.assert_timestamp, &pi.clear_timestamp,
|
|
pi.assert_sequence, pi.clear_sequence);
|
|
olda = pi.assert_sequence;
|
|
oldc = pi.clear_sequence;
|
|
}
|
|
|
|
return(0);
|
|
}
|