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

[Eduardo lavratti]

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.
>
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