uIEC date/time write never set

MIRKOSOFT · 18. Juli 2019

Hi!

I used for reading date/time from uIEC "T-RA" command - all was correct.

When I tried to use "T-WA" to write date/time I found problem - date/time is not possible to change, even device no error reports.

I used simple code (date and time are only example, uIEC device number is 11):

Code

OPEN15,11,15
PRINT#15, "T-WATHUR. 07/18/19 11:40:30 PM"+CHR$(13)
CLOSE15

then uIEC reports no error, but date/time is never changed.

How to fix it?

Thank you for all.

Miro

Unseen · 19. Juli 2019

Zitat von MIRKOSOFT

T-WATHUR. 07/18/19 11:40:30 PM"

"THUR." is not a valid day-of-week string. The parser uses fixed offsets within the command string, so everything after that is in the wrong position. To keep the code size down, only very limited validity checks are made on the parsing result.

MIRKOSOFT · 19. Juli 2019

Ok.

Nice code example - really perfect.

So, accepts "T-WA" MON/TUE... etc. - three letter day of week? And needs it dot after DOW?

Thank you.

Miro

MIRKOSOFT · 19. Juli 2019

I found problem - time is set, but until I reset computer.

Is possible by any way save time for later?

I know that uIEC has not battery.

Miro

Dirk Vroomen · 19. Juli 2019

Link: https://www.sd2iec.de/gitweb/?…lob;f=README;hb=HEAD#l235

Code

234
235 - T-R and T-W
236 If your hardware features RTC support the commands T-R (time read) and T-W
237 (time write) are available. If the RTC isn't present, both commands return
238 30,SYNTAX ERROR,00,00; if the RTC is present but not set correctly T-R will
239 return 31,SYNTAX ERROR,00,00.
240
241 Both commands expect a fourth character that specifies the time format
242 to be used. T-W expects that the new time follows that character
243 with no space or other characters inbetween. For the A, B and D
244 formats, the expected input format is exactly the same as returned
245 by T-R with the same format character; for the I format the day of
246 week is ignored and calculated based on the date instead.
247
248 The possible formats are:
249 - "A"SCII: "SUN. 01/20/08 01:23:45 PM"+CHR$(13)
250 The day-of-week string can be any of "SUN.", "MON.", "TUES", "WED.",
251 "THUR", "FRI.", "SAT.". The year field is modulo 100.
252
253 - "B"CD or "D"ecimal:
254 Both these formats use 9 bytes to specify the time. For BCD everything
255 is BCD-encoded, for Decimal the numbers are sent/parsed as-is.
256 Byte 0: Day of the week (0 for sunday)
257 1: Year (modulo 100 for BCD; -1900 for Decimal, i.e. 108 for 2008)
258 2: Month (1-based)
259 3: Day (1-based)
260 4: Hour (1-12)
261 5: Minute (0-59)
262 6: Second (0-59)
263 7: AM/PM-Flag (0 is AM, everything else is PM)
264 8: CHR$(13)
265
266 When the time is set a year less than 80 is interpreted as 20xx.
267
268 - "I"SO 8601 subset: "2008-01-20T13:23:45 SUN"+CHR$(13)
269 This format complies with ISO 8601 and adds a day of week
270 abbreviation using the same table as the A format, but omitting
271 the fourth character. When it is used with T-W, anything beyond
272 the seconds field is ignored and the day of week is calculated
273 based on the specified date. The year must always be specified
274 including the century if this format is used to set the time.
275 To save space, sd2iec only accepts this particular date/time
276 representation when setting the time with T-WI and no other ISo
277 8601-compliant representation.
278

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Unseen · 19. Juli 2019

Zitat von MIRKOSOFT

Ok.

Nice code example - really perfect.

That's actually my signature....

Zitat

So, accepts "T-WA" MON/TUE... etc. - three letter day of week? And needs it dot after DOW?

It needs four-letter DOWs, some of them with dot and some without, the full list is in the README. Complain to CMD if you don't like that inconsistency.

Zitat von MIRKOSOFT

I found problem - time is set, but until I reset computer.

Is possible by any way save time for later?

I know that uIEC has not battery.

The uIEC hardware does not have a hardware RTC, it only emulates one in software. When it loses power or is reset, it loses time. sd2iec supports a few different I2C RTCs that can run on battery, but I'm not sure if the pins for that are accessible on the uIEC boards and support for them is not compiled in by default.

MIRKOSOFT · 20. Juli 2019

Ok, understand.

I need to find other solution, but now I know how to set and get uIEC date/time.

Thank you all.

Miro