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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9610

Posted: 06:51am 04 Apr 2022

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DS3231 RTC chip NOT fitted, just using the on-board RTC.

Got this email from a client today about oddness with the RTC:

My client said
I received the Colour MaxiMite 2 Gen2 unit last week and I have been
testing it. I also have a CMM2 Gen1 computer for comparison.

First I inserted a CR1220 battery. For the power source I used a 5V, 2A
USB plug pack. VGA output is connected to 15.6" monitor The keyboard is
a Mini Starkey Multimedia Keyboard. The mouse is a basic Microsoft
optical mouse. I inserted an SD card with music, and some programs I had
written using CMM2 Gen1 unit.

Switching power on very quickly displayed MaxiMite start-up screen on
the monitor. The bottom line on the screen displayed:
05:09:45 05 - 14 - 2025.
I proceeded to set the current time and date:
TIME$ = "20:45:30" and DATE$ = "31/03/22"
These were now diplayed correctly on the monitor.

I typed FILES <ENTER>. I used mouse, which was working OK,to select and
run a program "bubbles.bas". This program ran fine. When I returned
to a screen with the prompy (>), the bottom line was
displaying:
A:/bubbles.bas 05:07:42 05 - 19 - 2025
I reset the current time and date again. The bottom line displayed the
correct information.

I decided to request a printout for time and date:

PRINT TIME$ gave 45:85:85
PRINT DATE$ gave 45 - 25 - 2165

NOT WORKING CORRECTLY!

I've never seen or heard of that kind of odd RTC behaviour. Anyone else see that or can anyone comment on why he would be seeing such strange results?

Smoke makes things work. When the smoke gets out, it stops!

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6283

Posted: 06:58am 04 Apr 2022

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I am surprised that he/she didn't see the initial startup where you have to set the keyboard and date etc.
I suggest reset all options and start over again, including removing the battery if needed.

Jim

VK7JH
MMedit

Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9610

Posted: 07:22am 04 Apr 2022

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Yes, I am wondering about that myself.

I have suggested that he:

1) Power off the unit
2) REMOVE the 1220 battery
3) Power up the unit
4) Select the keyboard layout, and set the date and time
5) Replace the 1220 battery
6) Cycle power and see if the RTC settings stay correct then.

I am wondering if putting in the 1220 battery BEFORE power-up and setting of the RTC, is somehow corrupting the ARM's internal RTC module or something.

Smoke makes things work. When the smoke gets out, it stops!

Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9610

Posted: 11:30pm 04 Apr 2022

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Further to this, got this reply:

Quote
Thank you for your quick response.
I followed your instructions as far as I could,
I replaced the power source by Samsung 5V, 2A Travel Adaptor.

- Battery removed
- Power up
- Monitor glowing softly, green LED lit
- Pressed reset button on CMM board
Red and green LEDs lit
MicroMite Screen displayed
Asking to specify keyboard layout - I selected 2 for US
Entered numbers for time 19:05:40
Entered numbers for date 04/04/22
Inserted the battery

Bottom line on the screen:
A:/bounce.bas 05:17:42 05 - 19 - 2025
Note: ~bounce.bas was one of the programs I ran yesterday
~seconds are counting up

Switched off and on again
MicroMite screen (and)

< (prompt)

Bottom line on the screen
A:/bounce.bas 05:05:53 05 - 19 - 2025
- Set time and date
time$ = "19:20:22"
dates = "04/04/22"
Bottom line on the screen
A:/bounce.bas 19:20:35 04 - 04 - 2022
[I didn't repeat PRINT time$ and date$]
- Switched off and on again
Red and green LEDs lit
MicroMite screen with the prompt and crazy time and date reappear

This is very odd. I have never seen this before in the hundreds of unit I have sold.

I told him to take the battery out again, and OPTION RESET, cycle power, re-enter the keyboard layout, date/time, put battery back in again and see if that helps.

I have no idea where the 2025 and 2165 year references are coming from....that is very strange indeed.

Smoke makes things work. When the smoke gets out, it stops!

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6283

Posted: 11:43pm 04 Apr 2022

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OPTION RESET is not the same as pressing the reset button. He mentions pressing the reset.

You also need a few minutes of no battery and power off to discharge backup power supplies.

Peter can advice on the correct method of clearing the system fully.

Jim

VK7JH
MMedit

Grogster

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Location: New Zealand
Posts: 9610

Posted: 04:06am 05 Apr 2022

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OPTION RESET did seem to fix this issue, so you were right to suggest it a few posts back.

Quote
OPTION LIST
CURRENT VGA mode 800.600 RGB332
CURRENT DISPLAY 50.100
OPTION DS3231 ON (that was me yesterday)
OPTION USERKEYBOARD US
OPTIOM MOUSE 0.0

OPTION RESET <ENTER>
Blank screen (faint glow)
- CMM off/on
- Insert battery
MAXIMITE screen
Select Keyboard Type 2
Time 11:02:40
Date 05/02/22

A:/bounce.bas 11:02:50 05-04-2022
LOOKS GOOD!

OPTION LIST
CURRENT VGA mode 800.600 RGB332
CURRENT DISPLAY 50.100
OPTION USERKEYBOARD US

- CMM off/on
A:/bounce.bas 11:23:26 05-04-2022

OPTION MOUSE 0 <ENTER>
>

OPTION LIST
CURRENT VGA mode 800.600 RGB332
CURRENT DISPLAY 50.100
OPTION USERKEYBOARD US
OPTION MOUSE 0.0

- CMM off/on
MAXIMITE screen

A:/bounce.bas 11:41:09 05-04-2022
> files

files displayed
Selected (with mouse) Perm.bas
Ran OK

A:/Perm.bas.bas 11:44:55 05-04-2022

HOOOREY, IT WORKS!

Your suggestion worked, thank you!
OPTION RESET did something. I can't see what?

Smoke makes things work. When the smoke gets out, it stops!

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