1 files changed, 100 insertions, 0 deletions
diff --git a/util/pps-api.c b/util/pps-api.c
new file mode 100644
index 0000000..60c98b8
--- /dev/null
+++ b/util/pps-api.c
@@ -0,0 +1,100 @@
+/*
+
+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);
+}