diff options
Diffstat (limited to 'common/cmd_date.c')
| -rw-r--r-- | common/cmd_date.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/common/cmd_date.c b/common/cmd_date.c new file mode 100644 index 0000000..1472e3f --- /dev/null +++ b/common/cmd_date.c @@ -0,0 +1,189 @@ +/* + * (C) Copyright 2001 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * RTC, Date & Time support: get and set date & time + */ +#include <common.h> +#include <command.h> +#include <rtc.h> + +#if (CONFIG_COMMANDS & CFG_CMD_DATE) + +const char *weekdays[] = { + "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur", +}; + +int mk_date (char *, struct rtc_time *); + +int do_date (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + struct rtc_time tm; + int rcode = 0; + + switch (argc) { + case 2: /* set date & time */ + if (strcmp(argv[1],"reset") == 0) { + printf ("Reset RTC...\n"); + rtc_reset (); + } else { + /* initialize tm with current time */ + rtc_get (&tm); + /* insert new date & time */ + if (mk_date (argv[1], &tm) != 0) { + printf ("## Bad date format\n"); + return 1; + } + /* and write to RTC */ + rtc_set (&tm); + } + /* FALL TROUGH */ + case 1: /* get date & time */ + rtc_get (&tm); + + printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n", + tm.tm_year, tm.tm_mon, tm.tm_mday, + (tm.tm_wday<0 || tm.tm_wday>6) ? + "unknown " : weekdays[tm.tm_wday], + tm.tm_hour, tm.tm_min, tm.tm_sec); + + return 0; + default: + printf ("Usage:\n%s\n", cmdtp->usage); + rcode = 1; + } + return rcode; +} + +/* + * simple conversion of two-digit string with error checking + */ +static int cnvrt2 (char *str, int *valp) +{ + int val; + + if ((*str < '0') || (*str > '9')) + return (-1); + + val = *str - '0'; + + ++str; + + if ((*str < '0') || (*str > '9')) + return (-1); + + *valp = 10 * val + (*str - '0'); + + return (0); +} + +/* + * Convert date string: MMDDhhmm[[CC]YY][.ss] + * + * Some basic checking for valid values is done, but this will not catch + * all possible error conditions. + */ +int mk_date (char *datestr, struct rtc_time *tmp) +{ + int len, val; + char *ptr; + + ptr = strchr (datestr,'.'); + len = strlen (datestr); + + /* Set seconds */ + if (ptr) { + int sec; + + *ptr++ = '\0'; + if ((len - (ptr - datestr)) != 2) + return (-1); + + len = strlen (datestr); + + if (cnvrt2 (ptr, &sec)) + return (-1); + + tmp->tm_sec = sec; + } else { + tmp->tm_sec = 0; + } + + if (len == 12) { /* MMDDhhmmCCYY */ + int year, century; + + if (cnvrt2 (datestr+ 8, ¢ury) || + cnvrt2 (datestr+10, &year) ) { + return (-1); + } + tmp->tm_year = 100 * century + year; + } else if (len == 10) { /* MMDDhhmmYY */ + int year, century; + + century = tmp->tm_year / 100; + if (cnvrt2 (datestr+ 8, &year)) + return (-1); + tmp->tm_year = 100 * century + year; + } + + switch (len) { + case 8: /* MMDDhhmm */ + /* fall thru */ + case 10: /* MMDDhhmmYY */ + /* fall thru */ + case 12: /* MMDDhhmmCCYY */ + if (cnvrt2 (datestr+0, &val) || + val > 12) { + break; + } + tmp->tm_mon = val; + if (cnvrt2 (datestr+2, &val) || + val > ((tmp->tm_mon==2) ? 29 : 31)) { + break; + } + tmp->tm_mday = val; + + if (cnvrt2 (datestr+4, &val) || + val > 23) { + break; + } + tmp->tm_hour = val; + + if (cnvrt2 (datestr+6, &val) || + val > 59) { + break; + } + tmp->tm_min = val; + + /* calculate day of week */ + GregorianDay (tmp); + + return (0); + default: + break; + } + + return (-1); +} + +#endif /* CFG_CMD_DATE */ |