[DM15 M1B v22] PR ERROR

If you think you've found a bug in one of these machines, post about it here indicating the steps you perform in order to reproduce it.

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[DM16 V22] CHS gives unexpected results
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Vartio L.
Posts: 25
Joined: Mon May 15, 2017 7:30 pm

[DM15 M1B v22] PR ERROR

Post by Vartio L. »

Firmware is v22.

I got PR ERROR several times while trying to turn the serial console up with key combination [ON]+[C]...
I admit I didn't read the http://www.swissmicros.com/instructions.php about the press and release sequence, but..

It might will couse a memory reset. I can reproduce it with ONhold+Chold+ONrelease+Crelease. With pretty speedy tempo <1sec.
Calc is connected to PC while doing so.

First calculator show (a line of pixels I notice now) and then the "[on]+[9] command screen" and then it stays on PR ERROR screen.

Erases the memory! -confirmed on my device.
rprosperi
Posts: 1703
Joined: Mon Apr 24, 2017 7:48 pm
Location: New York

Re: [DM15 M1B v22] PR ERROR

Post by rprosperi »

PR ERROR is what the 15C f/w displays when first turned-on after a memory lost (e.g. initial power-up, after changing batteries, etc.) so it does not really indicate an actual error. On the DM15, it basically means that the f/w has just 'booted' and is ready to use.
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
Vartio L.
Posts: 25
Joined: Mon May 15, 2017 7:30 pm

Re: [DM15 M1B v22] PR ERROR

Post by Vartio L. »

Yep. I learned it after posting this.

The bug comes from the fact it happens with slobby serial console key sequence (with a rolling fingers technique, I have no better description of it. Almost simultaneusly pressing the keys). NOTE: Only when USB cable is attached.
grsbanks
Posts: 1122
Joined: Tue Apr 25, 2017 11:23 am
Location: Preston, Lancs, UK
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Re: [DM15 M1B v22] PR ERROR

Post by grsbanks »

This does look more like a hardware issue than a firmware bug. I ran a load of tests with my DM12L unit flashed with the DM15_M1B firmware and it didn't exhibit this problem.
There are only 10 kinds of people in the world: those who understand binary and those who do not.
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