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Forum Index : Microcontroller and PC projects : Flash Write Error

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MikeO
Senior Member

Joined: 11/09/2011
Location: Australia
Posts: 275
Posted: 04:17pm 19 Sep 2016
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I am getting a Flash Write failure on trying to save a program. I had been successfully been running a program which had code in the Library and program memory. I had made a change in the Library code and went through the re flashing exercise and ended up with a CPU Exceptiona (a had a accent over it). Can't remember the exact sequence and point of failure as of course it was a surprise. It then went into a repeat cycle of
CPU exceptionà

CPU exceptionà

CPU exceptionà

CPU exceptionà

I had to stop it with the Shift! on reset. Then it signaled as below. It won't load anything into flash any more. I haven't tried yet to reload MMbasic but with the way it's behaving I wonder if its worth it, probably just replace the MX170 but it is a SOIC so will need soldering. Just wondered if anyone had experienced this.

Option error - Cleared OPTION TOUCH
Processor restarted
ÿÿýÿÿÿÿýÿÿýÿýÿÿýÿÿýÿýÿÿýÿýýÿýÿÿÿÿýÿÿýÿýÿÿýÿÿýÿýÿÿýÿÿýÿError: Flash write


Option error - Cleared OPTION TOUCH
Processor restarted

> memory
Flash:
0K ( 0%) Program (0 lines)
60K (100%) Free

RAM:
0K ( 0%) 0 Variables
0K ( 0%) General
50K (100%) Free
> Micromite MKII MMBasic Ver 5.2
Copyright 2011-2016 Geoff Graham

> Micromite MKII MMBasic Ver 5.2
Copyright 2011-2016 Geoff Graham

> option list
>
> XMODEM RECEIVE
Error: Flash write
> memory
Flash:
0K ( 0%) Program (0 lines)
60K (100%) Free

RAM:
0K ( 0%) 0 Variables
0K ( 0%) General
50K (100%) Free
>
Codenquilts
 
robert.rozee
Guru

Joined: 31/12/2012
Location: New Zealand
Posts: 2430
Posted: 04:42pm 19 Sep 2016
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not wanting to sound like a broken record player, but check the capacitor on the Vcap pin. this the single most common cause of peculiar errors.


cheers,
rob :-)
 
MikeO
Senior Member

Joined: 11/09/2011
Location: Australia
Posts: 275
Posted: 06:12pm 19 Sep 2016
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Thanks, I will check the cap and the power supply, it could have absolutely suddenly failed but this circuit has been functioning for several months.
Codenquilts
 
MikeO
Senior Member

Joined: 11/09/2011
Location: Australia
Posts: 275
Posted: 07:23pm 19 Sep 2016
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All working again.

I took it to the lab and checked power supply and cap, no issues there.
Uploaded and Ran a small clock program , print to console - OK
Set the options again for Display and Touch, Calibrated - OK
Ran a couple of Peter Mathers display demo - OK
Re install my software to library and main memory - OK
program ran - OK

I can only conclude some corruption with perhaps some connection too loosing the Options.Edited by MikeO 2016-09-21
Codenquilts
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10214
Posted: 09:02pm 19 Sep 2016
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Mike

I've seen the same issue as well - in my case only reflashing cures it.

I haven't been able to tie down a cause but I think it is associated with a program load that has been interrupted or something like that

 
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