UISP Problem Device not recognized (Working earlier)

[VaibhavGhadiok]

hi

I tried searching on the forums and wiki but could not find this error.

Cannot identify device because it is locked.
Device similar to ATmega103-old is found.

Interestingly enough uisp does work once after reboot. But I don't really think it works. Because when I try to flash an LED or something nothing really happens.

UISP was working until yesterday morning. And I haven't really changed much.

Thanks.

With regards
Vaibhav

[VaibhavGhadiok]

Just to add.

It seems there is a problem when I stick the three boards together (wifi robo and gumstix) with screws and nuts.

I opened everything and ran and things run ok. Is this a known issue.

However now I get and extremely interesting problem.

I used to be generating inverse PWM though my robostix. Now instead of the waveform going directly down it curves down to 0 V. Something like below but a lot more curvier. Again no changes to the program. Any clues. Used to work just fine.

*                                        *
 *                                       *
  *                                      *
    *                                    *
     *                                   *
       *                                 *
          *                              *
            *                            *
               *                         *
                  *                      *
                     *                  *
                        *               *
                           *            *
                               *         *
                                  *      *
                                     
 

VaibhavGhadiok wrote:

hi

I tried searching on the forums and wiki but could not find this error.

Cannot identify device because it is locked.
Device similar to ATmega103-old is found.

Interestingly enough uisp does work once after reboot. But I don't really think it works. Because when I try to flash an LED or something nothing really happens.

UISP was working until yesterday morning. And I haven't really changed much.

Thanks.

With regards
Vaibhav

[Dave Hylands]

Hi Vaibhav,

On Mon, Nov 2, 2009 at 10:44 AM, VaibhavGhadiok
<vaibhavghadiok@...> wrote:
>
> Just to add.
>
> It seems there is a problem when I stick the three boards together (wifi
> robo and gumstix) with screws and nuts.
>
> I opened everything and ran and things run ok. Is this a known issue.

The only issue I'm aware of is that the wifi draws too much power for
the robostix voltage regulators. You can bypass the robostix
regulators by following the modification in this document:
<http://pubs.gumstix.com/documents/robostix_power.pdf>

Check for physical interference between the boards. On some versions
of some boards components on one board would physically touch
components on another board. Needless to say, this can cause
undesirable behaviour.

> However now I get and extremely interesting problem.
>
> I used to be generating inverse PWM though my robostix. Now instead of the
> waveform going directly down it curves down to 0 V. Something like below but
> a lot more curvier. Again no changes to the program. Any clues. Used to work
> just fine.
>
> *                                        *
>  *                                       *
>  *                                      *
>    *                                    *
>     *                                   *
>       *                                 *
>          *                              *
>            *                            *
>               *                         *
>                  *                      *
>                     *                  *
>                        *               *
>                           *            *
>                               *         *
>                                  *      *

The only reason the PWM should curve is due to extra capacitance on the line.

You've unplugged everything else from the board right?

--
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

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[VaibhavGhadiok]

Well, my gumstix got fried. I tried using the tweener to connect and stuff. The power regulator on it is heating like crazy suggesting a short of some kind. The chip diagonally opposite to the 120 pin connector on the gumstix.

I guess, the power supply problems due to that were causing the robostix to mis-behave. Though even when the robostix is run without any of the other boards I get the same problems. Also the rise in the waveform was sharp and normal, only the fall seemed as if it was being filtered. The only reason could be something blew up on the hardware side. I was discussing this on the AVR Forums. After analyzing my code and waveform everybody had the same conclusion. Especially given the fact that the same code worked. The first hunches were capacitance and power supply. There was no capacitance, since everything was removed from the board.

So, I guess something was wrong with the power supply all along. Even though the voltages were just fine and there as no noticeable heating either.

I guess I have lost my board.

A little newbie question:

Are all the i2c packages available on open embedded. Is that what is recommended now? I guess it should be simpler than buildroot.

I know all the robostix toolchain is available. uisp, avr-gcc so I should just be able to transfer my programs.

Does the same apply for the gumstix programs? Would I have something like buildroot where I could compile the code using arm-gcc toolchain and then transfer it to the gumstix. Or are things different.
Or would I necessarily need to convert it to a package thing.

Thanks as always.

With regards
Vaibhav

Dave Hylands wrote:

Hi Vaibhav,

On Mon, Nov 2, 2009 at 10:44 AM, VaibhavGhadiok
<[e-mail]> wrote:
>
> Just to add.
>
> It seems there is a problem when I stick the three boards together (wifi
> robo and gumstix) with screws and nuts.
>
> I opened everything and ran and things run ok. Is this a known issue.

The only issue I'm aware of is that the wifi draws too much power for
the robostix voltage regulators. You can bypass the robostix
regulators by following the modification in this document:
<http://pubs.gumstix.com/documents/robostix_power.pdf>

Check for physical interference between the boards. On some versions
of some boards components on one board would physically touch
components on another board. Needless to say, this can cause
undesirable behaviour.

> However now I get and extremely interesting problem.
>
> I used to be generating inverse PWM though my robostix. Now instead of the
> waveform going directly down it curves down to 0 V. Something like below but
> a lot more curvier. Again no changes to the program. Any clues. Used to work
> just fine.
>
> *                                        *
>  *                                       *
>  *                                      *
>    *                                    *
>     *                                   *
>       *                                 *
>          *                              *
>            *                            *
>               *                         *
>                  *                      *
>                     *                  *
>                        *               *
>                           *            *
>                               *         *
>                                  *      *

The only reason the PWM should curve is due to extra capacitance on the line.

You've unplugged everything else from the board right?

--
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

------------------------------------------------------------------------------
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is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
_______________________________________________
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[e-mail]
https://lists.sourceforge.net/lists/listinfo/gumstix-users

[서경섭]

Some parts of this message have been removed. Learn more about Nabble's security policy.

Hello Gumstix-users.

 

I am trying to port QT Embedded Linux 4.5.3 on E-Ink's AM300 prototype kit.

But I happened segmentation fault.

 

Would anybody can help me?

Was there any previous trial like me?

Is it possible to port QTE 4.5.3 on AM300?

What is the consideration point?

 

What is the setting of make menuconfig?

ex) CONFIG_FB_EPSON_S1D13521=y

 

What is the shell environment variable?

ex) QWS_SIZE

 

What is the setting of QT configure option?

 

I am based on gumstix's buildroot r1427.

 

If anybody help, I will be appreciated.

Thanks

 

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