FreeCalypso > hg > freecalypso-tools
view loadtools/hwparam.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 | e7502631a0f9 |
children | 0dd2c87c1b63 |
line wrap: on
line source
/* * This module contains the code that reads the hardware parameter files * specified with -h or -H, and sets variables for later use by other code. */ #include <sys/param.h> #include <stdio.h> #include <ctype.h> #include <string.h> #include <strings.h> #include <stdlib.h> extern char default_helpers_dir[]; extern void set_boot_reflash_hack(); extern void set_default_exit_mode(); extern void set_flash_device(); char hw_init_script[128]; static void handle_compal_stage(arg, filename_for_errs, lineno_for_errs) char *arg; char *filename_for_errs; int lineno_for_errs; { char *cp; while (isspace(*arg)) arg++; if (!*arg) { fprintf(stderr, "%s line %d: compal-stage setting requires an argument\n", filename_for_errs, lineno_for_errs); exit(1); } for (cp = arg; *cp && !isspace(*cp); cp++) ; *cp = '\0'; set_compalstage_short(arg); } static void handle_init_script(arg, filename_for_errs, lineno_for_errs) char *arg; char *filename_for_errs; int lineno_for_errs; { char *cp; while (isspace(*arg)) arg++; if (!*arg) { fprintf(stderr, "%s line %d: init-script setting requires an argument\n", filename_for_errs, lineno_for_errs); exit(1); } for (cp = arg; *cp && !isspace(*cp); cp++) ; *cp = '\0'; if (cp - arg > sizeof(hw_init_script) - 1) { fprintf(stderr, "%s line %d: init-script argument is too long (buffer overflow)\n", filename_for_errs, lineno_for_errs); exit(1); } strcpy(hw_init_script, arg); } static void handle_pll_config(arg, filename_for_errs, lineno_for_errs) char *arg; char *filename_for_errs; int lineno_for_errs; { int mult, div; while (isspace(*arg)) arg++; if (!isdigit(*arg)) { inv: fprintf(stderr, "%s line %d: pll-config argument must be M/N\n", filename_for_errs, lineno_for_errs); exit(1); } mult = atoi(arg); arg++; if (isdigit(*arg)) arg++; if (*arg++ != '/') goto inv; if (!isdigit(*arg)) goto inv; div = atoi(arg); arg++; if (*arg && !isspace(*arg)) goto inv; if (mult < 0 || mult > 31 || div < 1 || div > 4) { fprintf(stderr, "%s line %d: pll-config argument is out of range\n", filename_for_errs, lineno_for_errs); exit(1); } set_romload_pll_conf((mult << 2) | (div - 1)); } static void handle_rhea_cntl(arg, filename_for_errs, lineno_for_errs) char *arg; char *filename_for_errs; int lineno_for_errs; { int byte; while (isspace(*arg)) arg++; if (arg[0] == '0' && (arg[1] == 'x' || arg[1] == 'X')) arg += 2; byte = decode_hex_byte(arg); if (byte < 0 || arg[2] && !isspace(arg[2])) { fprintf(stderr, "%s line %d: rhea-cntl argument must be a hex byte value\n", filename_for_errs, lineno_for_errs); exit(1); } set_romload_rhea_cntl(byte); } static struct cmdtab { char *name; void (*func)(); } cmdtab[] = { {"boot-reflash-hack", set_boot_reflash_hack}, {"compal-stage", handle_compal_stage}, {"exit-mode", set_default_exit_mode}, {"flash", set_flash_device}, {"init-script", handle_init_script}, {"pll-config", handle_pll_config}, {"rhea-cntl", handle_rhea_cntl}, {0, 0} }; void read_hwparam_file_fullpath(filename) char *filename; { FILE *f; char linebuf[512]; int lineno; char *cp, *np; struct cmdtab *tp; f = fopen(filename, "r"); if (!f) { perror(filename); exit(1); } for (lineno = 1; fgets(linebuf, sizeof linebuf, f); lineno++) { for (cp = linebuf; isspace(*cp); cp++) ; if (!*cp || *cp == '#') continue; for (np = cp; *cp && !isspace(*cp); cp++) ; if (*cp) *cp++ = '\0'; for (tp = cmdtab; tp->name; tp++) if (!strcmp(tp->name, np)) break; if (tp->func) tp->func(cp, filename, lineno); else { fprintf(stderr, "%s line %d: setting \"%s\" not understood\n", filename, lineno, np); exit(1); } } fclose(f); } void read_hwparam_file_shortname(confname) char *confname; { char pathname[MAXPATHLEN]; sprintf(pathname, "%s/%s.config", default_helpers_dir, confname); read_hwparam_file_fullpath(pathname); }