Re: [Paparazzi-devel] Eagle Tree airspeed sensor startup testers needed

[Marc Schwarzbach]

Hi,

just tried both suggestions for ETS_Airspeed and could not get it to work. 
Version 4.0.3
Any progress here?

Eduardo, could you send your full workaround, just adding your few lines of 
code and includes didn´t help either...

Can we trace the reason for the strange startup behaviour?

Thanks

Marc


-------- Original-Nachricht --------
> Datum: Sun, 7 Oct 2012 12:37:39 -0600
> Von: Stephen Dwyer <address@hidden>
> An: address@hidden
> Betreff: Re: [Paparazzi-devel] Eagle Tree airspeed sensor startup testers     
> needed

> Hello,
> 
> Sorry, I should have mentioned, yes I was using a logic analyzer
> (Saleae Logic16), so it is easy to see what is going on. Fantastically
> useful piece of test equipment :)
> 
> Another interesting point is that when it wasn't working at all, there
> was no traffic on the I2C bus. It was totally dead. I don't have
> enough I2C experience at this point (or time to learn unfortunately)
> to continue debugging right now. If I get a chance perhaps I can look
> again.
> 
> Thanks,
> -Stephen Dwyer
> 
> 
> 
> On Sun, Oct 7, 2012 at 12:08 PM, Eduardo lavratti <address@hidden>
> wrote:
> > Hello Stephen,
> > first of all , how you see tha NACK's in transactions ?
> > are you using logic analyzer ?
> >
> > This is the code i modified in airspeed_Adc.c
> > as you can see, this is ridiculous but work fine for me.
> >
> >
> > void airspeed_ets_init( void ) {
> >   int n;
> >   airspeed_ets_raw = 0;
> >   airspeed_ets = 0.0;
> >   airspeed_ets_offset = 0;
> >   airspeed_ets_offset_tmp = 0;
> >   airspeed_ets_i2c_done = TRUE;
> >   airspeed_ets_valid = TRUE;
> >   airspeed_ets_offset_init = FALSE;
> >   airspeed_ets_cnt = AIRSPEED_ETS_OFFSET_NBSAMPLES_INIT +
> > AIRSPEED_ETS_OFFSET_NBSAMPLES_AVRG;
> >
> > //#if ! defined SITL
> >   airspeed_ets_delay_done = FALSE;
> >   SysTimeTimerStart(airspeed_ets_delay_time);
> > //#else
> > //  airspeed_ets_delay_done = TRUE;
> > //  airspeed_ets_delay_time = 0;
> > //#endif
> >
> > //#ifndef SITL
> >   for (n=0; n < 60000; ++n){
> >   LED_ON(1)
> >   LED_OFF(1)}
> >  //
> >  // if (!airspeed_ets_delay_done) {
> >  //   if (SysTimeTimer(airspeed_ets_delay_time) < USEC_OF_SEC(1))
> return;
> >  //   else airspeed_ets_delay_done = TRUE;
> >  // }
> > //#endif
> >   airspeed_ets_buffer_idx = 0;
> >   for (n=0; n < AIRSPEED_ETS_NBSAMPLES_AVRG; ++n)
> >     airspeed_ets_buffer[n] = 0.0;
> >
> >   airspeed_ets_i2c_trans.status = I2CTransDone;
> > }
> >
> >
> >
> >> Date: Sun, 7 Oct 2012 14:41:06 +0100
> >> From: address@hidden
> >> To: address@hidden
> >
> >> Subject: Re: [Paparazzi-devel] Eagle Tree airspeed sensor startup
> testers
> >> needed
> >>
> >> On 05/10/12 21:31, Stephen Dwyer wrote:
> >> > Hello,
> >> >
> >> > I tried this out, and it was only working after a luftboot upload,
> not
> >> > after a regular bootup sequence. It was on a Lisa/M v2.0, nothing
> else
> >> > connected but UART2, on the Bixler example airframe, with the sensor
> >> > connected to I2C2. When it was working, it wasn't overly reliable,
> >> > with a considerable number of NACKed bytes in the transactions. The
> >> > same results occurred with a delay of 2sec or 8sec.
> >> >
> >>
> >> How do you see that? I only rely on the observation that the airspeed
> is
> >> not constant to tell if it worked.
> >>
> >> _______________________________________________
> >> Paparazzi-devel mailing list
> >> address@hidden
> >> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
> 
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