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cloudbase.mooo.com Git - z180-stamp.git/blob - avr/cmd_date.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 * RTC, Date & Time support: get and set date & time
13 #include <avr/pgmspace.h>
19 static const char * const weekdays
[] = {
20 "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
23 int mk_date (const char *, struct rtc_time
*);
25 command_ret_t
do_date(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
28 int rcode
= CMD_RET_SUCCESS
;
30 (void) cmdtp
; (void) flag
;
33 case 2: /* set date & time */
34 /* initialize tm with current time */
35 rcode
= rtc_get (&tm
);
38 /* insert new date & time */
39 if (mk_date (argv
[1], &tm
) != 0) {
40 my_puts_P(PSTR("## Bad date format\n"));
43 /* and write to RTC */
44 rcode
= rtc_set (&tm
);
46 my_puts_P(PSTR("## Set date failed\n"));
48 my_puts_P(PSTR("## Get date failed\n"));
51 case 1: /* get date & time */
52 rcode
= rtc_get (&tm
);
55 my_puts_P(PSTR("## Get date failed\n"));
58 /* TODO: put weekdays[] in flash */
59 printf_P(PSTR("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n"),
60 tm
.tm_year
, tm
.tm_mon
, tm
.tm_mday
,
61 (tm
.tm_wday
<0 || tm
.tm_wday
>6) ?
62 "unknown " : weekdays
[tm
.tm_wday
],
63 tm
.tm_hour
, tm
.tm_min
, tm
.tm_sec
);
67 rcode
= CMD_RET_USAGE
;
74 * simple conversion of two-digit string with error checking
76 static int cnvrt2 (const char *str
, int *valp
)
80 if ((*str
< '0') || (*str
> '9'))
87 if ((*str
< '0') || (*str
> '9'))
90 *valp
= 10 * val
+ (*str
- '0');
96 * Convert date string: MMDDhhmm[[CC]YY][.ss]
98 * Some basic checking for valid values is done, but this will not catch
99 * all possible error conditions.
101 int mk_date (const char *datestr
, struct rtc_time
*tmp
)
106 ptr
= strchr (datestr
,'.');
107 len
= strlen (datestr
);
114 if ((len
- (ptr
- datestr
)) != 2)
117 len
= strlen (datestr
);
119 if (cnvrt2 (ptr
, &sec
))
127 if (len
== 12) { /* MMDDhhmmCCYY */
130 if (cnvrt2 (datestr
+ 8, ¢ury
) ||
131 cnvrt2 (datestr
+10, &year
) ) {
134 tmp
->tm_year
= 100 * century
+ year
;
135 } else if (len
== 10) { /* MMDDhhmmYY */
138 century
= tmp
->tm_year
/ 100;
139 if (cnvrt2 (datestr
+ 8, &year
))
141 tmp
->tm_year
= 100 * century
+ year
;
145 case 8: /* MMDDhhmm */
147 case 10: /* MMDDhhmmYY */
149 case 12: /* MMDDhhmmCCYY */
150 if (cnvrt2 (datestr
+0, &val
) ||
155 if (cnvrt2 (datestr
+2, &val
) ||
156 val
> ((tmp
->tm_mon
==2) ? 29 : 31)) {
161 if (cnvrt2 (datestr
+4, &val
) ||
167 if (cnvrt2 (datestr
+6, &val
) ||
173 /* calculate day of week */