Re: serious problems with slimp3 player

Hey everybody,

If anyone can figure out how to reproduce this, there's a free player in
it for you!!!  I am completely stumped on this one. It seems to happen
completely at random, after the player has been running fine for hours.
I still don't know if it's defective chips (unlikely), a software bug, or
a problem with how we're programming them.

I'm sending Dominik a replacement PIC16F877 chip.

Sean

On Sun, 6 Jan 2002, Dominik Seitz wrote:

> Hello,
> I'm having really serious trouble with the freshly bought player:
>
> At first it worked without any trouble for some hours, then the display
> switched of. After powercycling the device, everything seemed to work again.
> But then, the display started to show strange signs and didn't react to the
> remote control anymore.
>
> I then uploaded the firmware version 1.1. It was a little difficult because the
> firmware upload display on the device was not showing any meaningful characters,
> not even the MAC address. Once I figured out the MAC address of the device, the
> uplaod program worked flawless.
>
> Things didn't change. Sporadically the display (and the hole device) was going
> mad.
>
> Then I tried to upload the firmware version 1.0. But now it seems the device
> cannot start into the firmware upload mode. When I power on the device holding
> down any button on the remote on of these two happens:
>
> * The display stays black and the upload programm on my linux box says:
>
> Loading image: MAIN.HEX
> image[4]==0x30e
> Writing 28 words at 0x04
>   Verify 1, timeout
>   Writing again, attempt 2
>   Verify 1, timeout
>   Writing again, attempt 3
>   Verify 1, timeout
>   Writing again, attempt 4
>   Verify 1, timeout
>   Writing again, attempt 5
>
>
> * The displays shows just one underscore "_". Firmware uploading doesn't work as
>   well. When I pull of the power plug, the firmware upload display shows up for a
>   milisecond.
>
> I'm using the device with the provided trafo on a 220V power network.  To me it
> seems as if the flash eprom containing the firmware is not stable. After every
> power cycle, the device seems to "loose" some firmware code.
>
> Anybody has an idea on how to fix this? At the moment I'm not even able to play
> anything.
>
> -Dominik
> --
> -------------------------------------------------------------------------------
> Dominik Seitz
> Ergon Informatik AG                               email: [email protected]
> -------------------------------------------------------------------------------
>
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