[rcpilot-site] Rcap source code

[A & RG D. <ad...@ko...>]

Thanks Mike
Adam
----- Original Message ----- 
From: <rcp...@li...>
To: <rcp...@li...>
Sent: Saturday, June 18, 2005 3:26 PM
Subject: rcpilot-site digest, Vol 1 #18 - 2 msgs


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> Today's Topics:
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>   1. Problems with Rcap source code (A & RG Demir)
>   2. Re: Problems with Rcap source code (Michael J. Pawlowsky)
>
> --__--__--
>
> Message: 1
> From: "A & RG Demir" <ad...@ko...>
> To: <rcp...@li...>
> Date: Sat, 18 Jun 2005 09:21:21 +1200
> Subject: [rcpilot-site] Problems with Rcap source code
> Reply-To: rcp...@li...
>
> Hello Mike
>
> Thanks for your reply .
>
> The following is the problem I came across with the RCAP source code .
>
> 1 . I can not find a call to subroutine "GetPos:" in the program listing .
>
> 2. Subroutine DoB or DoC line 2 :   Should cs=$8 be there ? cs is not 
> known
> until after return from subroutine DoCS .
>
> 3. Subroutine DoB line 8: field=12 (Bearing to destination) . Where is the
> field number 12 obtained from . Is it the position of gpsdata array 
> element
> [12] (GPRMB sentence) ? I find it to be in gpsdata array element [48] .
>
> Best Regards
>
> Adam
>
>
>
> ----- Original Message ----- 
> From: <rcp...@li...>
> To: <rcp...@li...>
> Sent: Wednesday, June 15, 2005 3:34 PM
> Subject: rcpilot-site digest, Vol 1 #17 - 1 msg
>
>
>> Send rcpilot-site mailing list submissions to
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>> Today's Topics:
>>
>>   1. Re: Gps routine for a model airplane elevator channel (Michael J.
>> Pawlowsky)
>>
>> -- __--__-- 
>>
>> Message: 1
>> Date: Tue, 14 Jun 2005 07:37:09 -0400
>> From: "Michael J. Pawlowsky" <mi...@mi...>
>> Organization: MI-Consultants
>> To: rcp...@li...
>> Subject: Re: [rcpilot-site] Gps routine for a model airplane elevator
>> channel
>> Reply-To: rcp...@li...
>>
>>
>> There is no way really to be able to land properly like this. The drift
>> in altitude would cause the plane to crash. Also there are many other
>> manoeuvres needed to land a plane that would need many more input
>> sensors to be able  evaluate the planes attitude, speed  and so on.
>>
>> As for the source code. It is the same as the HEX file and I've burned
>> many PICs with it and the RCAPs worked just fine.
>> If you describe your problem, perhaps I can help you with what you may
>> be doing wrong.
>>
>> Regards,
>> Mike
>>
>>
>> A & RG Demir wrote:
>>
>>> Hi All
>>> As an add-on to  RCAP Gps software I would like to use elevator
>>> channel (Vertical positioning) to land a  model airplane  on a runway
>>> .Would someone be kind enough to share a simple picbasic (or anything
>>> else ) software routine  on the above or an algorithm to lead  me in
>>> the right direction please .
>>> Incidentally , RCAP Gps software I had downloaded seems to have some
>>> flaws or missing parts to it .Does anybody have an RCAP  source code
>>> that produces the same hex file supplied with the zipped RCAP source
>>>  file .
>>> Thanks in advance
>>> Adam
>>
>>
>>
>>
>>
>>
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> --__--__--
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> Message: 2
> Date: Fri, 17 Jun 2005 19:28:42 -0400
> From: "Michael J. Pawlowsky" <mi...@mi...>
> Organization: MI-Consultants
> To: rcp...@li..., rcp...@li...
> Subject: Re: [rcpilot-site] Problems with Rcap source code
> Reply-To: rcp...@li...
>
> A & RG Demir wrote:
>
>> Hello Mike
>>
>> Thanks for your reply .
>>
>> The following is the problem I came across with the RCAP source code .
>>
>> 1 . I can not find a call to subroutine "GetPos:" in the program
>> listing .
>>
>
> Do a find in any text editor.. It's there  :-)
> =================================
>
> ' Get the start position of gpsdata for a specific field
> ' The field we are looking for is specified in the var "field"
> ' We return the position of the specified field back in the var "field"
>
> GetPos:
> ==================================================================
>
>
>
>> 2. Subroutine DoB or DoC line 2 :   Should cs=$8 be there ? cs is not
>> known until after return from subroutine DoCS .
>
>
> Read the comments...     ;-)
>
> cs = $8  ' This is the checksum of "GPRMB"
> If you calculated the the checksum of "GPRMB" it is $8.
> So since that is always constant, it simply avoids calculating the 
> checkcum
> for those chars everytime.
>
>
>
>>
>> 3. Subroutine DoB line 8: field=12 (Bearing to destination) . Where is
>> the field number 12 obtained from . Is it the position of gpsdata
>> array element [12] (GPRMB sentence) ? I find it to be in gpsdata array
>> element [48] .
>>
>
> The size of a field is not constant. So we can't tell what byte position
> we want. However the field positions are constant.
> Again if we read the comments....
>
> field = 12                       ' Tell GetNumField which field we want
>
> And then look at the GetNumField subrouting you will see that it
> returns the value of the 12th field.
>
>
> Cheers,
> Mike
>
>
> P.S. This I'm moving this to the developpers list, since it has nothing
> to do with the web site.
> The web site list was created for people that were going to create the 
> site.
>
>
>
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