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[Paparazzi-devel] Pleasure instead of pressure on development, would be

From: Jeffrey Szeto
Subject: [Paparazzi-devel] Pleasure instead of pressure on development, would be good!
Date: Sat, 14 Jun 2008 06:28:36 +0800

All please let me make my last common, it is 4a.m. here is Hong Kong, I'm tired like to get few hours for sleep. But I decide to spent 2 hours on writing this reply, rather then ignoring! Hopefully everyone is generous & understand enough, the necessary for my reply & speak out!

(to David - PPZUAV)

Don't worry & be happy!

Naming after the PPZ, as PPZUAV. does confuse all to be the official Vendor. For a long time I though that Micheal & the team owns the site! Later find out, owner is not from France, is San Diego instead. Well it is fair to said that, it certainly would changed your world! ( with more than 54 thousand click on shop!

I'm sure your work certainly pay off, no one ever have doubt about that! So should u have doubt with other existence!

Last year same time, I have working on supplying Mobile component, mainly iPhone related. I have owned some secrets about it for a month, which later I find to cooperative with many large supplier with joy! Some are very young too, they're very mature & very successful person. Mostly their personally oriented who they met & work with. Lots of celebrity & peoples were met!

So what goods does it make to have War, inside out! Cooperation is always favorable! Or will end up both a Loser!

If you agree with me, work & contribution is not a competition. ( But you never agree on other vendors, apart from yourself ), The availability of hardware is also essential, to build the community's up with more new blood! That's why the team willing to Open & release all their hard works.

If you have time & ability, u will do what you enjoy to, Just like now ( research on UAV project )
Should not have the pressure!  Instead should be, Pleasure!

~ Pleasure instead of pressure, would be good! ~

We're modern peaceful people, not an outlaw. Comment on others disability is always find to be rude. Can you ever stop doing this again! Also will upset people!

Project is about JOY & FUN!  I would think all would agree on this!

We know one day you will understand!

Don't worry about the price too much ok, we'll try to match on you reasonability. Also we have different modules types, as u're service base (supple to end user), we're B2B base ( supply to vendor)!

Also We always leave enough rooms & space for others to grow healthily!

Anytime you're welcome to speak with us, I'm sure cooperate is a Gain, nothing lose!

Jeffrey ( Halfbase )

在 2008年6月14日 上午12:00 時, paparazzi-devel- address@hidden 寫到:

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Today's Topics:

  1. Re: Missing TWOG design and gerbers? (David Conger)
  2. Re: Course desired issues (Gautier Hattenberger)


Message: 1
Date: Fri, 13 Jun 2008 00:56:45 -0700
From: David Conger <address@hidden>
Subject: Re: [Paparazzi-devel] Missing TWOG design and gerbers?
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes


Pascal, thank you for your comments. The changes to PPZUAV site are
almost complete based on your inputs. I had avoided direct reference
to Paparazzi only out of fear it might upset the group. It is good to
hear it is welcome and encouraged. Do not hesitate to tell us more.
FWIW: The images on PPZUAV are our own. If the image exists on the
Wiki it's because we put it there to add to the Wiki. There are many
images and edits from dconger (myself) on the Wiki. For the curious,
the nice thing about the Wiki is you can view all page history and
edits easily to see who really contributes and what they contribute.

On the topic of vendors I really hope to lead by example.  Things I
personally have done to promote Paparazzi are many and the list I
wrote out was too long for this reply. Many others offer more and it
just feels inappropriate to distract attention from the project. What
is most important isn't telling someone where to buy something or how
much it costs it's answering their questions and helping them to get

If I don't post more it's because I'm still learning. But as I learn I
give back and always will. I just hope other vendors follow because
help Paparazzi Project to grow and there will be room enough for
hundreds of vendors in the future because there will be thousands of
Paparazzi Projects out there.

I won't say any more. I just really wanted to take a minute to reply
because there is so much do and say that isn't related to selling
something. It is a world class product and you should all be proud. I
see many familiar names writing to the email list each day and it's
pretty cool to keep up on all the projects and to learn as I build mine.

Keep up the amazing work because this will change the world.


On Jun 12, 2008, at 3:10 AM, address@hidden wrote:


no gerber or design files for the TWOG have been published yet.
Michel has just
mounted one and is currently testing it. Thanks to the results of
these tests,
he will publish the files. We suppose the picture displayed at is the one coming from the Paparazzi wiki
( The only source
for software
or hardware in this project is the wiki website and the CVS
repository. We do
not send files directly to anybody.

This message is an opportunity for me to make a remark: We are
really pleased
that people around the world build and sell hardware for the
Paparazzi project.
However, I'm quite surprised that no link to
appear on the
sellers' websites. It would be nice to have at least one link to behind each Paparazzi icon and a link to the
design files for each product. I think it would help to convince
continue to support this project ...



Selon David Conger <address@hidden>:

I'm confused, one of the vendors Halfbase has the TWOG listed as
available but there are no gerbers or design files posted on the
Did someone skip posting to the Wiki and go straight to Halfbase?
Confused. I'd like to make some TWOG PCB but can't without either the
design or gerber files.


Paparazzi-devel mailing list

Paparazzi-devel mailing list


Message: 2
Date: Fri, 13 Jun 2008 13:40:02 +0200
From: Gautier Hattenberger <address@hidden>
Subject: Re: [Paparazzi-devel] Course desired issues
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain;       charset=ISO-8859-1;     format=flowed


Haiyang, you're absolutely right. The course setpoint is between -pi/2
and 3*pi/2 while the gps course is between 0 and 2*pi. And it's not a
problem because in fw_h_ctl.c:174 the difference between the two angles
is normalized between -pi and pi before being used by the controller.

Daniel, if you want to have a nice display in your plotter, you can add :
if (h_ctl_course_setpoint<0) h_ctl_course_setpoint += 2*M_PI;
after the line 309 in nav.c, but that won't change your navigation.


Haiyang Chao a 嶰rit :
Just a few details to add for this question. Any comment is welcomed.

In nav.c, line 309,  desired course is calculated as:
h_ctl_course_setpoint = M_PI/2.-atan2(y - estimator_y, x - estimator_x);
The function atan2() can return values between [-pi, pi]. So the
desired course is just between [-pi/2,pi*3/2].

But for GPS course, based on my observation, moving north is roughly 0
or 2*pi, moving south is around pi, moving east is pi/2, moving west
is pi*3/2.

So I guess there must be some difference between real course and
desired one unless there are some limitations on estimator_x and
estimator_y, which I have not take a detail look in the code. Really
busy recently for some hardware problems.


On Thu, Jun 12, 2008 at 10:57 PM, Daniel Morgan
<mailto:address@hidden>> wrote:

   I have been talking to poine and anton about this issue for a
   couple of days and they both concluded it should not be
   happening... What is happening on this plot is the course
   desired's range is -90 to 270 and and the acutal is 0 to 360...
   Now i talked to anton today and he said that he talked to poine
   and they thought it was a issue with my code being messed up or
   something.. So on his advice i changed my old paparazzi's folder
   name and did a completely new cvs... When i did this it did not
   aleviate the issues. So i thought maybe it was something with my
   pc or my config, because of this i decided to try out a completely
   clean system. What i did was i booted of a ubunut 8.04 live cd and
   installed pprz from this last nights tarball(cvs command was
   having issues for some reason)and used only the files in the cvs
   and still got the same issue. The screenshot is from that (you may
   notice the time is off but don't let that fool ya)... Needless to
   say i am hoping someone who knows the code better can fix this or
   at least shed some more light on it...

   here is that screenshot

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