mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-25 17:43:09 +02:00
Added burst counter mode to cntr tool, plus assorted small improvements.
- tools/cntr/cntr.c (measure): also stop if ^C is pressed while we're unsuccessfully trying to communicate with the device - tools/cntr/cntr.c (main): report a usage error if an argument is given to -i or -r - tools/cntr/cntr.c (arm_stop, measure): moveing open-coded arming of the SIGINT handler to separate function - tools/cntr/cntr.c (count_bursts, usage, main): added burst counter mode (cntr -b [timeout_s])
This commit is contained in:
Werner Almesberger
parent
8cb17bb1b3
commit
df1706fe74
@ -89,7 +89,7 @@ static void identify_cntr(usb_dev_handle *dev)
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}
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/* ----- measurements ------------------------------------------------------ */
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/* ---- packet reception --------------------------------------------------- */
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struct sample {
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@ -99,13 +99,6 @@ struct sample {
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static unsigned packets = 0, crc_errors = 0, inv_errors = 0;
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static volatile int stop = 0;
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static void set_stop(int sig)
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{
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stop = 1;
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}
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static int get_sample(usb_dev_handle *dev, struct sample *s)
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@ -163,6 +156,56 @@ static int get_sample(usb_dev_handle *dev, struct sample *s)
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}
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/* ---- SIGINT (Ctrl-C) ---------------------------------------------------- */
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static volatile int stop = 0;
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static void set_stop(int sig)
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{
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stop = 1;
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}
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static void arm_stop(void)
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{
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signal(SIGINT, set_stop);
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}
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/* ---- burst counter ------------------------------------------------------ */
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static void count_bursts(usb_dev_handle *dev, double timeout)
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{
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struct sample start, stable, now;
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arm_stop();
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while (!get_sample(dev, &start));
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stable = start;
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while (!stop) {
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while (!get_sample(dev, &now))
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if (stop)
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break;
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if (stable.cntr != now.cntr) {
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stable = now;
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continue;
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}
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if (now.t0-stable.t1 < timeout)
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continue;
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if (now.cntr == start.cntr)
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continue;
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printf("%llu\n", (unsigned long long) now.cntr-start.cntr);
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start = now;
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}
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}
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/* ----- measurements ------------------------------------------------------ */
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static void measure(usb_dev_handle *dev, double clock_dev_s, double error_goal)
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{
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struct sample start, now;
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@ -171,7 +214,7 @@ static void measure(usb_dev_handle *dev, double clock_dev_s, double error_goal)
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char *f_exp, *error_exp;
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int i;
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signal(SIGINT, set_stop);
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arm_stop();
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/*
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* The round-trip time for getting the first sample is one of the
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@ -190,7 +233,9 @@ static void measure(usb_dev_handle *dev, double clock_dev_s, double error_goal)
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}
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while (!stop) {
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usleep(100000);
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while (!get_sample(dev, &now));
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while (!get_sample(dev, &now))
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if (stop)
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break;
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dc = now.cntr-start.cntr;
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dt = (now.t0+now.t1)/2.0-(start.t0+start.t1)/2.0;
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f = dc/dt;
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@ -248,17 +293,20 @@ static void usage(const char *name)
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{
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fprintf(stderr,
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"usage: %s [-c clock_dev] [-d] [-v] [accuracy_ppm]\n"
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"%6s %s -b [-d] [-v] [timeout_s]\n"
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"%6s %s -i\n"
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"%6s %s -r\n\n"
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" accuracy_ppm stop when specified accuracy is reached (default: never\n"
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" stop)\n"
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" timeout_s silence period between bursts, in seconds (default: 1s )\n"
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" -b count bursts separated by silence periods\n"
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" -c clock_dev maximum deviation of the system clock, in seconds\n"
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" (default: %g s)\n"
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" -d debug mode. Print counter values.\n"
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" -i identify the CNTR board\n"
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" -r reset the CNTR board\n"
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" -v verbose reporting of communication errors\n"
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, name, "", name, "", name, DEFAULT_CLOCK_DEV_S);
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, name, "", name, "", name, "", name, DEFAULT_CLOCK_DEV_S);
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exit(1);
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}
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@ -266,13 +314,16 @@ static void usage(const char *name)
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int main(int argc, char *const *argv)
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{
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usb_dev_handle *dev;
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int c, identify = 0, reset = 0;
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int c, burst = 0, identify = 0, reset = 0;
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double clock_dev_s = DEFAULT_CLOCK_DEV_S;
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double error_goal = 0;
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char *end;
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while ((c = getopt(argc, argv, "c:dir")) != EOF)
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while ((c = getopt(argc, argv, "bc:dir")) != EOF)
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switch (c) {
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case 'b':
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burst = 1;
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break;
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case 'c':
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clock_dev_s = strtod(argv[optind], &end);
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if (*end)
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@ -290,13 +341,15 @@ int main(int argc, char *const *argv)
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default:
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usage(*argv);
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}
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if (identify && reset)
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if (burst+identify+reset > 1)
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usage(*argv);
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switch (argc-optind) {
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case 0:
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break;
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case 1:
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if (identify || reset)
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usage(*argv);
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error_goal = strtod(argv[optind], &end)/1000000.0;
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if (*end)
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usage(*argv);
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@ -321,6 +374,11 @@ int main(int argc, char *const *argv)
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return 0;
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}
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if (burst) {
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count_bursts(dev, error_goal ? error_goal : 1);
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return 0;
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}
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measure(dev, clock_dev_s, error_goal);
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return 0;
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