Re: [Paparazzi-devel] Voltage bias in battery level

[Pascal Brisset]

Hi,

Add something like

       <define name="VoltageOfAdc(adc)" value="(0.018*adc)"/>

in your aiframe file. The default def is in conf/autopilot/tiny_2_1.h:

#define DefaultVoltageOfAdc(adc) (0.01787109375*adc)


--Pascal

Austin Jensen wrote:
> All,
>
> I just recently noticed that the battery levels read from the 
> Paparazzi board are changing from board to board (TWOG) on the exact 
> same aircraft with the same fully charged batteries. Is there a 
> variable I can add to the airframe file to compensate for this? I have 
> looked myself without any luck. If not, would a good place to put one 
> be in the main_fbw.c file line  203?
>
> #ifdef ADC
>   if (!_10Hz)
>     fbw_vsupply_decivolt = 
> VoltageOfAdc((10*(vsupply_adc_buf.sum/vsupply_adc_buf.av_nb_sample)));
> #endif
>
> Thanks,
> Austin
> ------------------------------------------------------------------
> Austin Jensen, Research Engineer
> Utah Water Research Laboratory (UWRL)
> Utah State University, 8200 Old Main Hill
> Logan, UT, 84322-8200, USA
> E: address@hidden 
> <mailto:address@hidden>
> T: (435)797-3315
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