Re: [Paparazzi-devel] Cannon Launch Detection

[Pascal Brisset]

Hi,

David Bryant wrote:
> Thanks Pascal,
>
> That's extremely helpful. I've got a module running, following the 
> outline that you provided. I'm reading from the ADCs and want to be 
> sure I understand how they work correctly.
>
> From what I can tell, you declare a buffer (struct adc_buf) and 
> register it for samples to be accumulated in it (adc_buf_channel). 
> Then in each update it would seem you can either:
>
> * Use the average value accumulated: buf.sum / buf.av_nb_sample
> * Or look at the samples directly buf.values[0..buf.av_nb_sample - 1]
>
> Is this correct?
Yes

> What causes this structure to get reset?
There is no reset function available but since it is a concrete type, 
you can reset it by hand
> What is the member buf.head about?
It is the index of the last inserted value
> Are modules automatically written for paparazzi automatically licensed 
> under GPL?

Yep. If you want to distribute an application involving this code, it 
will be GPL

--Pascal

> Thanks,
> Dave