DM42 hung during img copy, USB file system erased

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cappy
Posts: 54
Joined: Sun Jul 30, 2017 5:30 pm

DM42 hung during img copy, USB file system erased

Post by cappy » Wed Feb 14, 2018 11:12 pm

I was trying to copy 3 bmp files to the OFFIMG directory, from a Windows 7 64-Bit laptop.
The copy process tovery long, so I knew something was wrong. FIle Explorer just hung, I couldn't kill the process easily.
The DM42 still showed the "USB WriteMode" screen, press EXIT key to end was still visible.

Pressing EXIT did nothing. The calc is hung.

I've pressed the reset button, and now have control of the DM42 again, but the USB filesystem is wiped out.
Fortunately, I made a copy of all of those files before I did anything else.

I'm just not sure of the procedure to recreate the USB filesystem.

If you see ever the image below, that must be the default in flash,
and is displayed when your filesystem gets wiped out.
DM42_default_sm.jpg
DM42_default_sm.jpg (67.41 KiB) Viewed 780 times
DM42 SN: 0612

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Walter
Posts: 726
Joined: Tue May 02, 2017 9:13 am
Location: Close to FRA, Germany

Re: DM42 hung during img copy, USB file system erased

Post by Walter » Thu Feb 15, 2018 6:11 am

The dozing owl IS the default image until you've loaded something different.
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

cappy
Posts: 54
Joined: Sun Jul 30, 2017 5:30 pm

Re: DM42 hung during img copy, USB file system erased

Post by cappy » Thu Feb 15, 2018 6:24 am

Walter wrote:
Thu Feb 15, 2018 6:11 am
The dozing owl IS the default image until you've loaded something different.
Yes, but without a file system, other images can’t be loaded.
The other images were the, until an image copy operation hung, and wiped out everything.
DM42 SN: 0612

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Walter
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Joined: Tue May 02, 2017 9:13 am
Location: Close to FRA, Germany

Re: DM42 hung during img copy, USB file system erased

Post by Walter » Thu Feb 15, 2018 7:54 am

If I ever get a shotgun I'll shoot auto-complete. :evil:
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

dlachieze
Posts: 116
Joined: Thu May 04, 2017 10:20 am
Location: France

Re: DM42 hung during img copy, USB file system erased

Post by dlachieze » Thu Feb 15, 2018 7:58 am

cappy wrote:
Wed Feb 14, 2018 11:12 pm
I'm just not sure of the procedure to recreate the USB filesystem.
Shift SETUP > System > Format FAT Disk
DM42 SN: 00425

cappy
Posts: 54
Joined: Sun Jul 30, 2017 5:30 pm

Re: DM42 hung during img copy, USB file system erased

Post by cappy » Thu Feb 15, 2018 2:24 pm

dlachieze wrote:
Thu Feb 15, 2018 7:58 am
cappy wrote:
Wed Feb 14, 2018 11:12 pm
I'm just not sure of the procedure to recreate the USB filesystem.
Shift SETUP > System > Format FAT Disk
Thanks, I found it in the manual.
I’m surprised that the file system is so easily destroyed, especially when copying an offing.
DM42 SN: 0612

SybotCB
Posts: 1
Joined: Wed Feb 28, 2018 2:29 pm

Re: DM42 hung during img copy, USB file system erased

Post by SybotCB » Thu Mar 15, 2018 4:06 pm

The same thing happened to me and it was the first time I plugged it in, I was removing a few of the offimg's I didn't like, and it hung.

Now my help menu is gone, I've recreated the filesystem, but it only puts two directories, where can I get the help file, and what is the directory structure that I put it into?

etn
Posts: 13
Joined: Sun Dec 10, 2017 1:14 pm

Re: DM42 hung during img copy, USB file system erased

Post by etn » Fri Mar 16, 2018 9:34 am

The factory contents of the FAT disk is available here:
https://www.swissmicros.com/dm42/fat/

grsbanks
Posts: 642
Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK

Re: DM42 hung during img copy, USB file system erased

Post by grsbanks » Fri Mar 16, 2018 9:50 am

Also make sure you're running the latest firmware (V3.4a). A fix was put into V3.4 to eliminate these spurious crashes and gain a bit of execution speed, and V3.4a was released almost immediately afterwards to correct a bug that had crept in making it impossible to alter the mute setting.
Not SwissMicros staff, just an enthusiast.

cappy
Posts: 54
Joined: Sun Jul 30, 2017 5:30 pm

Re: DM42 hung during img copy, USB file system erased

Post by cappy » Fri Mar 16, 2018 10:23 am

grsbanks wrote:
Fri Mar 16, 2018 9:50 am
Also make sure you're running the latest firmware (V3.4a). A fix was put into V3.4 to eliminate these spurious crashes and gain a bit of execution speed, and V3.4a was released almost immediately afterwards to correct a bug that had crept in making it impossible to alter the mute setting.
I think the hang was due to my USB hub having a loose connection.
I have the 3.4a FW now.
DM42 SN: 0612

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