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511 lines
12 KiB
511 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* PTP 1588 clock support - User space test program |
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* |
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* Copyright (C) 2010 OMICRON electronics GmbH |
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*/ |
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#define _GNU_SOURCE |
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#define __SANE_USERSPACE_TYPES__ /* For PPC64, to get LL64 types */ |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <inttypes.h> |
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#include <math.h> |
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#include <signal.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/ioctl.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <sys/time.h> |
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#include <sys/timex.h> |
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#include <sys/types.h> |
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#include <time.h> |
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#include <unistd.h> |
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#include <linux/ptp_clock.h> |
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#define DEVICE "/dev/ptp0" |
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#ifndef ADJ_SETOFFSET |
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#define ADJ_SETOFFSET 0x0100 |
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#endif |
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#ifndef CLOCK_INVALID |
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#define CLOCK_INVALID -1 |
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#endif |
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#define NSEC_PER_SEC 1000000000LL |
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/* clock_adjtime is not available in GLIBC < 2.14 */ |
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#if !__GLIBC_PREREQ(2, 14) |
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#include <sys/syscall.h> |
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static int clock_adjtime(clockid_t id, struct timex *tx) |
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{ |
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return syscall(__NR_clock_adjtime, id, tx); |
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} |
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#endif |
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static void show_flag_test(int rq_index, unsigned int flags, int err) |
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{ |
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printf("PTP_EXTTS_REQUEST%c flags 0x%08x : (%d) %s\n", |
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rq_index ? '1' + rq_index : ' ', |
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flags, err, strerror(errno)); |
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/* sigh, uClibc ... */ |
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errno = 0; |
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} |
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static void do_flag_test(int fd, unsigned int index) |
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{ |
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struct ptp_extts_request extts_request; |
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unsigned long request[2] = { |
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PTP_EXTTS_REQUEST, |
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PTP_EXTTS_REQUEST2, |
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}; |
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unsigned int enable_flags[5] = { |
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PTP_ENABLE_FEATURE, |
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PTP_ENABLE_FEATURE | PTP_RISING_EDGE, |
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PTP_ENABLE_FEATURE | PTP_FALLING_EDGE, |
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PTP_ENABLE_FEATURE | PTP_RISING_EDGE | PTP_FALLING_EDGE, |
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PTP_ENABLE_FEATURE | (PTP_EXTTS_VALID_FLAGS + 1), |
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}; |
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int err, i, j; |
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memset(&extts_request, 0, sizeof(extts_request)); |
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extts_request.index = index; |
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for (i = 0; i < 2; i++) { |
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for (j = 0; j < 5; j++) { |
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extts_request.flags = enable_flags[j]; |
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err = ioctl(fd, request[i], &extts_request); |
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show_flag_test(i, extts_request.flags, err); |
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extts_request.flags = 0; |
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err = ioctl(fd, request[i], &extts_request); |
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} |
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} |
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} |
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static clockid_t get_clockid(int fd) |
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{ |
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#define CLOCKFD 3 |
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return (((unsigned int) ~fd) << 3) | CLOCKFD; |
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} |
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static long ppb_to_scaled_ppm(int ppb) |
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{ |
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/* |
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* The 'freq' field in the 'struct timex' is in parts per |
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* million, but with a 16 bit binary fractional field. |
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* Instead of calculating either one of |
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* |
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* scaled_ppm = (ppb / 1000) << 16 [1] |
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* scaled_ppm = (ppb << 16) / 1000 [2] |
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* |
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* we simply use double precision math, in order to avoid the |
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* truncation in [1] and the possible overflow in [2]. |
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*/ |
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return (long) (ppb * 65.536); |
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} |
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static int64_t pctns(struct ptp_clock_time *t) |
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{ |
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return t->sec * 1000000000LL + t->nsec; |
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} |
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static void usage(char *progname) |
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{ |
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fprintf(stderr, |
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"usage: %s [options]\n" |
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" -c query the ptp clock's capabilities\n" |
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" -d name device to open\n" |
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" -e val read 'val' external time stamp events\n" |
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" -f val adjust the ptp clock frequency by 'val' ppb\n" |
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" -g get the ptp clock time\n" |
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" -h prints this message\n" |
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" -i val index for event/trigger\n" |
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" -k val measure the time offset between system and phc clock\n" |
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" for 'val' times (Maximum 25)\n" |
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" -l list the current pin configuration\n" |
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" -L pin,val configure pin index 'pin' with function 'val'\n" |
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" the channel index is taken from the '-i' option\n" |
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" 'val' specifies the auxiliary function:\n" |
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" 0 - none\n" |
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" 1 - external time stamp\n" |
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" 2 - periodic output\n" |
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" -p val enable output with a period of 'val' nanoseconds\n" |
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" -H val set output phase to 'val' nanoseconds (requires -p)\n" |
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" -w val set output pulse width to 'val' nanoseconds (requires -p)\n" |
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" -P val enable or disable (val=1|0) the system clock PPS\n" |
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" -s set the ptp clock time from the system time\n" |
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" -S set the system time from the ptp clock time\n" |
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" -t val shift the ptp clock time by 'val' seconds\n" |
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" -T val set the ptp clock time to 'val' seconds\n" |
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" -z test combinations of rising/falling external time stamp flags\n", |
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progname); |
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} |
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int main(int argc, char *argv[]) |
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{ |
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struct ptp_clock_caps caps; |
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struct ptp_extts_event event; |
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struct ptp_extts_request extts_request; |
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struct ptp_perout_request perout_request; |
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struct ptp_pin_desc desc; |
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struct timespec ts; |
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struct timex tx; |
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struct ptp_clock_time *pct; |
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struct ptp_sys_offset *sysoff; |
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char *progname; |
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unsigned int i; |
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int c, cnt, fd; |
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char *device = DEVICE; |
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clockid_t clkid; |
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int adjfreq = 0x7fffffff; |
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int adjtime = 0; |
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int capabilities = 0; |
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int extts = 0; |
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int flagtest = 0; |
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int gettime = 0; |
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int index = 0; |
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int list_pins = 0; |
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int pct_offset = 0; |
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int n_samples = 0; |
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int pin_index = -1, pin_func; |
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int pps = -1; |
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int seconds = 0; |
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int settime = 0; |
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int64_t t1, t2, tp; |
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int64_t interval, offset; |
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int64_t perout_phase = -1; |
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int64_t pulsewidth = -1; |
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int64_t perout = -1; |
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progname = strrchr(argv[0], '/'); |
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progname = progname ? 1+progname : argv[0]; |
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while (EOF != (c = getopt(argc, argv, "cd:e:f:ghH:i:k:lL:p:P:sSt:T:w:z"))) { |
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switch (c) { |
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case 'c': |
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capabilities = 1; |
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break; |
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case 'd': |
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device = optarg; |
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break; |
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case 'e': |
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extts = atoi(optarg); |
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break; |
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case 'f': |
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adjfreq = atoi(optarg); |
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break; |
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case 'g': |
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gettime = 1; |
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break; |
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case 'H': |
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perout_phase = atoll(optarg); |
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break; |
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case 'i': |
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index = atoi(optarg); |
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break; |
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case 'k': |
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pct_offset = 1; |
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n_samples = atoi(optarg); |
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break; |
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case 'l': |
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list_pins = 1; |
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break; |
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case 'L': |
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cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func); |
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if (cnt != 2) { |
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usage(progname); |
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return -1; |
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} |
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break; |
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case 'p': |
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perout = atoll(optarg); |
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break; |
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case 'P': |
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pps = atoi(optarg); |
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break; |
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case 's': |
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settime = 1; |
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break; |
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case 'S': |
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settime = 2; |
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break; |
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case 't': |
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adjtime = atoi(optarg); |
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break; |
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case 'T': |
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settime = 3; |
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seconds = atoi(optarg); |
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break; |
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case 'w': |
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pulsewidth = atoi(optarg); |
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break; |
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case 'z': |
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flagtest = 1; |
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break; |
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case 'h': |
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usage(progname); |
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return 0; |
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case '?': |
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default: |
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usage(progname); |
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return -1; |
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} |
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} |
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fd = open(device, O_RDWR); |
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if (fd < 0) { |
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fprintf(stderr, "opening %s: %s\n", device, strerror(errno)); |
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return -1; |
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} |
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clkid = get_clockid(fd); |
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if (CLOCK_INVALID == clkid) { |
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fprintf(stderr, "failed to read clock id\n"); |
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return -1; |
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} |
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if (capabilities) { |
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if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) { |
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perror("PTP_CLOCK_GETCAPS"); |
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} else { |
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printf("capabilities:\n" |
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" %d maximum frequency adjustment (ppb)\n" |
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" %d programmable alarms\n" |
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" %d external time stamp channels\n" |
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" %d programmable periodic signals\n" |
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" %d pulse per second\n" |
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" %d programmable pins\n" |
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" %d cross timestamping\n" |
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" %d adjust_phase\n", |
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caps.max_adj, |
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caps.n_alarm, |
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caps.n_ext_ts, |
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caps.n_per_out, |
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caps.pps, |
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caps.n_pins, |
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caps.cross_timestamping, |
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caps.adjust_phase); |
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} |
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} |
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if (0x7fffffff != adjfreq) { |
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memset(&tx, 0, sizeof(tx)); |
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tx.modes = ADJ_FREQUENCY; |
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tx.freq = ppb_to_scaled_ppm(adjfreq); |
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if (clock_adjtime(clkid, &tx)) { |
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perror("clock_adjtime"); |
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} else { |
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puts("frequency adjustment okay"); |
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} |
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} |
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if (adjtime) { |
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memset(&tx, 0, sizeof(tx)); |
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tx.modes = ADJ_SETOFFSET; |
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tx.time.tv_sec = adjtime; |
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tx.time.tv_usec = 0; |
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if (clock_adjtime(clkid, &tx) < 0) { |
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perror("clock_adjtime"); |
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} else { |
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puts("time shift okay"); |
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} |
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} |
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if (gettime) { |
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if (clock_gettime(clkid, &ts)) { |
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perror("clock_gettime"); |
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} else { |
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printf("clock time: %ld.%09ld or %s", |
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ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec)); |
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} |
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} |
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if (settime == 1) { |
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clock_gettime(CLOCK_REALTIME, &ts); |
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if (clock_settime(clkid, &ts)) { |
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perror("clock_settime"); |
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} else { |
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puts("set time okay"); |
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} |
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} |
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if (settime == 2) { |
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clock_gettime(clkid, &ts); |
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if (clock_settime(CLOCK_REALTIME, &ts)) { |
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perror("clock_settime"); |
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} else { |
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puts("set time okay"); |
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} |
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} |
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if (settime == 3) { |
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ts.tv_sec = seconds; |
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ts.tv_nsec = 0; |
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if (clock_settime(clkid, &ts)) { |
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perror("clock_settime"); |
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} else { |
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puts("set time okay"); |
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} |
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} |
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if (extts) { |
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memset(&extts_request, 0, sizeof(extts_request)); |
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extts_request.index = index; |
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extts_request.flags = PTP_ENABLE_FEATURE; |
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if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) { |
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perror("PTP_EXTTS_REQUEST"); |
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extts = 0; |
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} else { |
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puts("external time stamp request okay"); |
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} |
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for (; extts; extts--) { |
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cnt = read(fd, &event, sizeof(event)); |
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if (cnt != sizeof(event)) { |
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perror("read"); |
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break; |
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} |
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printf("event index %u at %lld.%09u\n", event.index, |
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event.t.sec, event.t.nsec); |
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fflush(stdout); |
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} |
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/* Disable the feature again. */ |
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extts_request.flags = 0; |
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if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) { |
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perror("PTP_EXTTS_REQUEST"); |
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} |
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} |
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if (flagtest) { |
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do_flag_test(fd, index); |
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} |
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if (list_pins) { |
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int n_pins = 0; |
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if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) { |
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perror("PTP_CLOCK_GETCAPS"); |
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} else { |
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n_pins = caps.n_pins; |
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} |
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for (i = 0; i < n_pins; i++) { |
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desc.index = i; |
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if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) { |
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perror("PTP_PIN_GETFUNC"); |
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break; |
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} |
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printf("name %s index %u func %u chan %u\n", |
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desc.name, desc.index, desc.func, desc.chan); |
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} |
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} |
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if (pulsewidth >= 0 && perout < 0) { |
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puts("-w can only be specified together with -p"); |
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return -1; |
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} |
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if (perout_phase >= 0 && perout < 0) { |
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puts("-H can only be specified together with -p"); |
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return -1; |
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} |
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if (perout >= 0) { |
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if (clock_gettime(clkid, &ts)) { |
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perror("clock_gettime"); |
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return -1; |
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} |
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memset(&perout_request, 0, sizeof(perout_request)); |
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perout_request.index = index; |
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perout_request.period.sec = perout / NSEC_PER_SEC; |
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perout_request.period.nsec = perout % NSEC_PER_SEC; |
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perout_request.flags = 0; |
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if (pulsewidth >= 0) { |
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perout_request.flags |= PTP_PEROUT_DUTY_CYCLE; |
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perout_request.on.sec = pulsewidth / NSEC_PER_SEC; |
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perout_request.on.nsec = pulsewidth % NSEC_PER_SEC; |
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} |
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if (perout_phase >= 0) { |
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perout_request.flags |= PTP_PEROUT_PHASE; |
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perout_request.phase.sec = perout_phase / NSEC_PER_SEC; |
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perout_request.phase.nsec = perout_phase % NSEC_PER_SEC; |
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} else { |
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perout_request.start.sec = ts.tv_sec + 2; |
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perout_request.start.nsec = 0; |
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} |
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if (ioctl(fd, PTP_PEROUT_REQUEST2, &perout_request)) { |
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perror("PTP_PEROUT_REQUEST"); |
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} else { |
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puts("periodic output request okay"); |
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} |
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} |
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if (pin_index >= 0) { |
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memset(&desc, 0, sizeof(desc)); |
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desc.index = pin_index; |
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desc.func = pin_func; |
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desc.chan = index; |
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if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) { |
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perror("PTP_PIN_SETFUNC"); |
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} else { |
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puts("set pin function okay"); |
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} |
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} |
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if (pps != -1) { |
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int enable = pps ? 1 : 0; |
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if (ioctl(fd, PTP_ENABLE_PPS, enable)) { |
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perror("PTP_ENABLE_PPS"); |
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} else { |
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puts("pps for system time request okay"); |
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} |
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} |
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if (pct_offset) { |
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if (n_samples <= 0 || n_samples > 25) { |
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puts("n_samples should be between 1 and 25"); |
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usage(progname); |
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return -1; |
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} |
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sysoff = calloc(1, sizeof(*sysoff)); |
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if (!sysoff) { |
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perror("calloc"); |
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return -1; |
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} |
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sysoff->n_samples = n_samples; |
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|
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if (ioctl(fd, PTP_SYS_OFFSET, sysoff)) |
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perror("PTP_SYS_OFFSET"); |
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else |
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puts("system and phc clock time offset request okay"); |
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pct = &sysoff->ts[0]; |
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for (i = 0; i < sysoff->n_samples; i++) { |
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t1 = pctns(pct+2*i); |
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tp = pctns(pct+2*i+1); |
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t2 = pctns(pct+2*i+2); |
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interval = t2 - t1; |
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offset = (t2 + t1) / 2 - tp; |
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printf("system time: %lld.%u\n", |
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(pct+2*i)->sec, (pct+2*i)->nsec); |
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printf("phc time: %lld.%u\n", |
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(pct+2*i+1)->sec, (pct+2*i+1)->nsec); |
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printf("system time: %lld.%u\n", |
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(pct+2*i+2)->sec, (pct+2*i+2)->nsec); |
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printf("system/phc clock time offset is %" PRId64 " ns\n" |
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"system clock time delay is %" PRId64 " ns\n", |
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offset, interval); |
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} |
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free(sysoff); |
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} |
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close(fd); |
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return 0; |
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}
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