[eagle] Re: YAHOO!!!! IT WORKS!!!!

Jim Sanford wb4gcs at amsat.org
Mon Sep 17 15:19:25 PDT 2007


Don:
I agree, and thanks.

I think the CAN-Do! manual also needs to be updated, because the next 
team to integrate a widget will be just as unfamiliar.
Thanks & 73,
Jim
wb4gcs at amsat.org


Don Ferguson wrote:
> Jim,
>
> You are correct that some documentation is necessary. The reason we did not
> relate to this concern earlier was that when we received the Widget for the
> UHF Receiver I first communicated with it using CDNC and in doing a Query
> the module returned its presence and created log records with the correct
> address in them.
>
> I then used these original Log records to create the data stream to include
> the initialization data for the U-Rx. The fact that these records already
> contained the correct address, via CDNC Query, made the concept of Widget
> Address a non issue.
>
> Our lack of understanding was not obvious until we attempted to use our
> initialization stream on a different widget and the receiver failed to
> function. There was no noticeable indication from the CDNC program that the
> widget addressed was not available. 
>
> It is now apparent that we will need to document this area and I will add
> some documentation to the CAN-DO part of the U-RX ATP. Others will want to
> use this experience to guide them in documenting their part of the Eagle
> project.
>
> Don  
>
> -----Original Message-----
> From: eagle-bounces at amsat.org [mailto:eagle-bounces at amsat.org] On Behalf Of
> Chuck Green
> Sent: Sunday, September 16, 2007 5:53 PM
> To: Jim Sanford
> Cc: Robert McGwier; eagle at amsat.org
> Subject: [eagle] Re: YAHOO!!!! IT WORKS!!!!
>
> Hi Jim,
>
> The mode and address must be soldered onto the widget (jumper pads 
> provided on the widget for this purpose).  It is assumed that the module 
> builder would do this.  It's that assumption that should be documented.  
> I say this to bring up the follow-on issue.
>
> The module builder chooses the mode.
>
> The address should be specified by the system administrator since the 
> addresses must be unique for each module and the priority is a function 
> of the address.  Module builders should give input to the system 
> administrator as to what they feel their priority should be, but 
> presumably only the system administrator is in a position to know the 
> priority requirements of *all* modules and is therefor in a position to 
> make these priority (address) decisions.
>
> Chuck
>
> Jim Sanford wrote:
>   
>> Guys:
>> There's a lesson here:   DOCUMENTATION
>>
>> Juan expected/assumed one thing, the CAN-Do! widget was something 
>> else.  Other teams will go through exactly the same issue.  SO, it 
>> appears we need to add some documentation to each WIDGET in terms of 
>> serial number, address, and probably a handful of other things I don't 
>> know about. 
>>
>> Let's learn from this experience.
>>
>> Juan, thanks to you and your team for perservering.
>>
>> Stephen, thanks for your prompt support on a short fuse.
>>
>> This kind of response and mutual support is exemplary, and what it 
>> will take to get Eagle on orbit.
>>
>> Thanks & very 73,
>> Jim
>> wb4gcs at amsat.org
>>
>>
>> Dave hartzell wrote:
>>     
>>> Wow, this is a relief.  I'm glad it was something simple....after all
>>> the hunting and pecking we did yesterday, I'm glad it was something so
>>> simple.
>>>
>>> I guess when the term "bus" is used, an address as probably key to
>>> getting to your destination.  ;-)
>>>
>>> Dave
>>>
>>> On 9/16/07, Juan Rivera <juan-rivera at sbcglobal.net> wrote:
>>>   
>>>       
>>>> All,
>>>>
>>>> We need to take up a collection to buy Stephen a large hero badge.  He
>>>>         
> fixed
>   
>>>> the problem and the receiver is now sitting on my bench happily
>>>>         
> receiving a
>   
>>>> signal.  The new CAN-Do module that he sent me had a different address
>>>>         
> than
>   
>>>> the old one and the old files were addressing the initialization
>>>> instructions to a non-existent device.  All we have to do is change the
>>>> address field in the initialization files and everything is fine.
>>>>
>>>> Whew!  The train of life in back on the tracks!
>>>>
>>>> 73 to all,
>>>>
>>>> Juan
>>>>
>>>>
>>>> _______________________________________________
>>>> Via the Eagle mailing list courtesy of AMSAT-NA
>>>> Eagle at amsat.org
>>>> http://amsat.org/mailman/listinfo/eagle
>>>>
>>>>     
>>>>         
>>>   
>>>       
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Via the Eagle mailing list courtesy of AMSAT-NA
>> Eagle at amsat.org
>> http://amsat.org/mailman/listinfo/eagle
>>   
>>     
> _______________________________________________
> Via the Eagle mailing list courtesy of AMSAT-NA
> Eagle at amsat.org
> http://amsat.org/mailman/listinfo/eagle
>
>
>
>   
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