FreeCalypso > hg > freecalypso-tools
view rvinterf/etmsync/readcal.c @ 407:19e5a3e2f9c0
fcup-settime: moved time() retrieval a little closer to the output
A fundamental problem with all simple time transfer tools is that there is
always some delay between the time retrieval on the source system and that
transmitted time being set on the destination, and the resulting time
on the destination system is off by that delay amount. This delay cannot
be fully eliminated when working in a simple environment like ours,
but we should make our best effort to minimize it. In the present case,
moving the atinterf_init() call before the time() retrieval should make
a teensy-tiny improvement.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 11 Aug 2018 21:52:17 +0000 |
parents | 36ae854536e8 |
children | e40bb5a6c6b9 |
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/* * This utility reads the RF calibration data out of a TI-based GSM device * using the L1TM protocol over RVTMUX. Warning: invasive tms 1 and rfpw 7 * commands are issued to the target in order to select the band of interest! */ #include <sys/types.h> #include <sys/file.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <unistd.h> #include "tm3.h" #include "l1tm.h" #include "localtypes.h" #include "exitcodes.h" int compal_mode; extern char *socket_pathname; extern char *rvinterf_ttyport, *rvinterf_Bopt, *rvinterf_lopt, *rvinterf_wopt; /* macro for encoding std and band in rfpw 7 command */ #define RFPW_STD_BAND(std,band) ((std) | ((band) << 8)) static struct band { char *argname; char *filename; unsigned rfpw_std_band; } bands[] = { {"900", "900", RFPW_STD_BAND(6, 0)}, {"1800", "1800", RFPW_STD_BAND(6, 1)}, {"1900", "1900", RFPW_STD_BAND(8, 1)}, {"850", "850", RFPW_STD_BAND(8, 0)}, {"1900s", "1900", RFPW_STD_BAND(3, 0)}, {"850s", "850", RFPW_STD_BAND(7, 0)}, {0, 0, 0} }; static void write_out_file(filename, data, size) char *filename; u_char *data; { int fd; fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0666); if (fd < 0) { perror(filename); exit(ERROR_UNIX); } write(fd, data, size); close(fd); } copy_afcdac() { u16 datum; u_char bytes[2]; int rc; rc = do_rfpr(INITIAL_AFC_DAC, &datum); if (rc) exit(rc); datum <<= 3; bytes[0] = datum; bytes[1] = datum >> 8; write_out_file("afcdac", bytes, 2); } copy_afcparams() { u_char table[24]; int rc; rc = do_rftr(AFC_PARAMS, table, sizeof table); if (rc) exit(rc); write_out_file("afcparams", table, sizeof table); } copy_rx_agcparams(bandname) char *bandname; { u_char table[8]; char filename[32]; int rc; rc = do_rftr(RX_AGC_PARAMS, table, sizeof table); if (rc) exit(rc); sprintf(filename, "rx/agcparams.%s", bandname); write_out_file(filename, table, sizeof table); } copy_rx_calchan(bandname) char *bandname; { u_char table[40]; char filename[32]; int rc; rc = do_rftr(RX_CAL_CHAN, table, sizeof table); if (rc) exit(rc); sprintf(filename, "rx/calchan.%s", bandname); write_out_file(filename, table, sizeof table); } copy_tx_levels(bandname) char *bandname; { u_char table[128]; char filename[32]; int rc; rc = do_rftr(TX_LEVELS, table, sizeof table); if (rc) exit(rc); sprintf(filename, "tx/levels.%s", bandname); write_out_file(filename, table, sizeof table); } copy_tx_calchan(bandname) char *bandname; { u_char table[128]; char filename[32]; int rc; rc = do_rftr(TX_CAL_CHAN, table, sizeof table); if (rc) exit(rc); sprintf(filename, "tx/calchan.%s", bandname); write_out_file(filename, table, sizeof table); } copy_tx_ramps(bandname) char *bandname; { u_char table[512]; char filename[32]; int rc, i; for (i = 0; i < 16; i++) { rc = do_ttr(i, table + i * 32); if (rc) exit(rc); } sprintf(filename, "tx/ramps.%s", bandname); write_out_file(filename, table, sizeof table); } process_band(bandname) char *bandname; { int rc; rc = host_mkdir("rx"); if (rc) exit(rc); copy_rx_agcparams(bandname); if (!compal_mode) copy_rx_calchan(bandname); rc = host_mkdir("tx"); if (rc) exit(rc); copy_tx_levels(bandname); if (!compal_mode) copy_tx_calchan(bandname); copy_tx_ramps(bandname); } single_op_main(argc, argv) char **argv; { int rc; char **ap; struct band *tp; if (argc < 2) { fprintf(stderr, "usage: fc-readcal [options] output-dir band...\n"); exit(ERROR_USAGE); } if (chdir(argv[0]) < 0) { perror(argv[0]); exit(ERROR_UNIX); } rc = do_tms(1); if (rc) exit(rc); for (ap = argv + 1; *ap; ap++) { if (!strcmp(*ap, "afc")) { copy_afcdac(); copy_afcparams(); continue; } for (tp = bands; tp->argname; tp++) if (!strcmp(*ap, tp->argname)) break; if (!tp->argname) { fprintf(stderr, "error: unknown band name \"%s\"\n", *ap); exit(ERROR_USAGE); } rc = do_rfpw(STD_BAND_FLAG, tp->rfpw_std_band); if (rc) exit(rc); process_band(tp->filename); } exit(0); } main(argc, argv) char **argv; { extern int optind; extern char *optarg; int c, sopt = 0; while ((c = getopt(argc, argv, "B:cl:p:s:w:")) != EOF) switch (c) { case 'B': rvinterf_Bopt = optarg; continue; case 'c': compal_mode++; continue; case 'l': rvinterf_lopt = optarg; continue; case 'p': rvinterf_ttyport = optarg; continue; case 's': socket_pathname = optarg; sopt++; continue; case 'w': rvinterf_wopt = optarg; continue; case '?': default: /* error msg already printed */ exit(ERROR_USAGE); } if (rvinterf_ttyport) { if (sopt) { fprintf(stderr, "%s error: -p and -s options are mutually exclusive\n", argv[0]); exit(ERROR_USAGE); } if (compal_mode && !rvinterf_Bopt) rvinterf_Bopt = "57600"; launch_rvinterf(); } else { if (rvinterf_Bopt || rvinterf_lopt || rvinterf_wopt) { fprintf(stderr, "%s error: -B, -l and -w options are meaningful only when launching rvinterf\n", argv[0]); exit(ERROR_USAGE); } connect_local_socket(); } return single_op_main(argc - optind, argv + optind); }