[En-Nut-Discussion] Back in the game

Rich Wellner ethernut at objenv.com
Thu Feb 22 14:28:25 CET 2007 

FYI, I'm not sure why this one took 7 days to hit the list, but I'm good 
to go now.  Thanks to all those who helped.

rw2

Rich Wellner wrote:
> In an odd way I'm glad you are getting stumped also.  Doesn't solve my 
> problem, but makes me happier about my analytic techniques.  :-)
>
> I hadn't thought about reading the flash back out and checking to make 
> sure it makes sense.  I'll look at a manual when I get home, unless 
> someone knows off the top of their head how to do this with uisp.
>
> rw2
>
> Ernst Stippl wrote:
>   
>> Hi!
>>
>> Very strange indeed! 
>> My reasoning would be: if 2 ethernuts show the same ("dead") behaviour and
>> am reasonably certain this is not the case, what remains to be suspect is
>> the SW i.e. the flashing process.
>> You could try to read the flash memory to see if it really contains the
>> binary to think should be there. 
>> Maybe even using another flashing program to upload / download and compare
>> results...
>> I running out of ideas...
>>
>> regards
>> ernst 
>>  
>>
>> -----Ursprüngliche Nachricht-----
>> Von: en-nut-discussion-bounces at egnite.de
>> [mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Rich Wellner
>> Gesendet: Dienstag, 13. Februar 2007 04:43
>> An: Ethernut User Chat (English)
>> Betreff: Re: [En-Nut-Discussion] Back in the game
>>
>> The meter shows .38V on pin 41 running the stock led01 example.
>>
>> I didn't hook up the LED without a resistor, and I've tried it on two
>> different nuts, so I'm pretty sure that the port isn't bad.  That said, I
>> went ahead and reprogrammed for DDRB and get a similar .36V reading on pin
>> 49.
>>
>> I tried reprogramming to hold the pin high or low per your suggestion, but
>> showed a .37V in both cases.
>>
>> My power supply is rated at 9V 1000ma and seems stable.
>>
>> This just keeps getting more mysterious to me.  I keep going back to the
>> fact that I can load the httpd demo, but not see any dhcp requests on the
>> wire and that I don't see anything on the serial port either (having now
>> convinced myself that I don't need a null modem).  It seems as if the
>> programmer is happy, but then nothing ever runs and I'm not sure what else
>> to check.
>>
>> rw2
>>
>> Ernst Stippl wrote:
>>   
>>     
>>> Hi!
>>>
>>> Not knowing how much of an "HW-guy" you are:
>>> Did you look at http://www.ethernut.de/en/documents/led-hardware.html ?
>>>
>>> It shows the importance of the LED's polarity vs. Vcc and the neeed 
>>> for a resistor.
>>>
>>> When you tried to measure the voltage levels, what did the meter show? 
>>> 0V or
>>> +5V or ??
>>>
>>> I would also modify the program to just issue the
>>>
>>> sbi(DDRE, 2);
>>> and go into and infinite loop afterwards
>>>
>>> then modify it to just issue
>>>  
>>> cbi(DDRE, 2);
>>> and go into and infinite loop afterwards
>>>
>>> This way, you could measure the voltage in both situations without the 
>>> time constraints (of the program toggling the io port bit).
>>> An you could try the LED (plus resistor) in both cases (of course this 
>>> does only make sense if the measured voltage is more than 2V-3V, i guess.
>>>
>>> You could also retry this on another pin after adapting the program,  
>>> just in case the port at pin 41 got destroyed by using the LED without 
>>> the resistor ( i do not know how likely this is).
>>>
>>> regards
>>> Ernst
>>>
>>> P.S: are you sure the Vcc voltage (i.e. the power supply) you use 
>>> supplies enough current and is stable enough?
>>>
>>> -----Ursprüngliche Nachricht-----
>>> Von: en-nut-discussion-bounces at egnite.de
>>> [mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Rich 
>>> Wellner
>>> Gesendet: Montag, 12. Februar 2007 04:06
>>> An: Ethernut User Chat (English)
>>> Betreff: Re: [En-Nut-Discussion] Back in the game
>>>
>>> Thanks for the response.
>>>
>>> I hooked the LED to VCC and pin 41.  Nadda.
>>>
>>> So I hooked a meter to VCC and pin 41 (and every other pin in PE in 
>>> case I was reading the manual wrong) looking for a change in voltage, 
>>> but nothing happened.
>>>
>>> Since I wrote my other note, I've also gotten out another nut and 
>>> tried the same process with no luck.  So it appears I'm doing 
>>> something wrong rather than having a bad board.
>>>
>>> rw2
>>>
>>> Ernst Stippl wrote:
>>>   
>>>     
>>>       
>>>> Hi!
>>>>
>>>> To which pins on the expansion socket did you connect the LEDs? Are 
>>>> you sure they match the port (B,D,E) and the respective bit you use 
>>>> in
>>>>     
>>>>       
>>>>         
>>> your program?
>>>   
>>>     
>>>       
>>>> regards
>>>> ernst
>>>>
>>>> -----Ursprüngliche Nachricht-----
>>>> Von: en-nut-discussion-bounces at egnite.de
>>>> [mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Rich 
>>>> Wellner
>>>> Gesendet: Sonntag, 11. Februar 2007 21:09
>>>> An: Ethernut User Chat (English)
>>>> Betreff: Re: [En-Nut-Discussion] Back in the game
>>>>
>>>> Ok, I seem to be burning things using uisp.  But nothing ever comes 
>>>> to life on the nut.
>>>>
>>>> Specifically I've tried
>>>> http://www.ethernut.de/en/documents/led-blink.html and the httpd 
>>>> sample that came with the dev kit.  Both go through "make burn"
>>>> apparently successfully, but neither seems to do anything (i.e. no 
>>>> flashing LED and monitoring the dhcp server shows that no request is 
>>>> being made for an IP nor does the server respond if I hardcode an IP 
>>>> and remove the #define to request an IP via dhcp).
>>>>
>>>> For example:
>>>> /dev/ethernut/ethernut-4.2.1/app/httpd$ make burn uisp -dprog=stk500 
>>>> -dserial=/dev/ttyS0 -dspeed=115200 -dpart=atmega128 --erase --upload 
>>>> if=httpserv.hex Firmware Version: 1.14 Atmel AVR ATmega128 is found.
>>>> Firmware Version: 1.14
>>>> Uploading: flash
>>>>
>>>> I tried hooking up to the serial port, but no luck.  I suspect I need 
>>>> a null modem, but don't have one at the moment.  In any case, given 
>>>> that the LED program isn't causing an LED flash, I suspect that the 
>>>> serial line wouldn't tell me anything either.
>>>>
>>>> So, I'm looking for advice on how to continue debugging at this point.  
>>>> Thanks in advance to any who respond.
>>>>
>>>> rw2
>>>>
>>>> Rich Wellner wrote:
>>>>   
>>>>     
>>>>       
>>>>         
>>>>> After a long absence, I've some time to get back in touch with my 
>>>>> Rev F boards.  So I went to the site to get a development stack
>>>>>         
>>>>>           
>> installed.
>>   
>>     
>>>>> I thought I'd share my results.
>>>>>
>>>>> This page: http://www.ethernut.de/en/documents/debiansage.html
>>>>>    has specifically calls out ethernut-3.9.9 when the current 
>>>>> version is
>>>>> 4.2.1
>>>>>
>>>>> The main doc link: http://www.ethernut.de/pdf/enswm24e.pdf
>>>>>
>>>>>    Page 14: In summary it says "download then unpack then configure, 
>>>>> but before you configure"  The preconfiguration requirements should 
>>>>> be listed before the instruction to "run ./configure"
>>>>>
>>>>>    Page 14: It specified to run ./configure, but never instructs to 
>>>>> run make && make install.  Unless these commands are run, the next 
>>>>> step "Configuring Nut" won't work because nutconf hasn't been built yet.
>>>>>
>>>>>     Page 16: It specifies to enter the correct top of source 
>>>>> directory as /opt/ethernut/nut.  As above the nut directory doesn't
>>>>>       
>>>>>         
>>>>>           
>>> exist.
>>>   
>>>     
>>>       
>>>>>    Page 17: It would be helpful if the location of the sample apps 
>>>>> were given.
>>>>>
>>>>> After this I can build samples.  Tomorrow perhaps I will try to burn 
>>>>> something.
>>>>>
>>>>> Actually, on that point.  How do I determine which burner I have?  I 
>>>>> have a grey dongle with a yellow LED on it, but no other markings.
>>>>> Is there a document somewhere with the various gadgets egnite has 
>>>>> sold over the years specified?
>>>>>       
>>>>>         
>>>>>           
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>>
>>
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>>   
>>     
>
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