Re: [Paparazzi-devel] Scaling factor: uint16_t into float

[Gautier Hattenberger]

The ADC uses a 10 bits converter. So it gives values between 0 (0V) and 
1023 (3V, unless you use adc 5 or 6 of a Tiny2.x).

For your problem, it all depends of the way you want to use these values.
- You can display them in a real time plotter with a scaling factor.
- You can use the values in the log file after your flight.
- You can write a small Ivy agent (C,Ocaml) that read the values coming 
from the telemetry and do whatever you want.
- You can write a piece of airborne code that reads the adc value, 
define a new message and send it to the ground.

Gautier


Brendan Chen a écrit :
> Hi all,
>
> Anyone know where and how to convert the downlinked ADC_GENERIC value into a 
> more meaningful value?
>
> I could be wrong but from what i understand, the ADC_GENERIC function returns a 
> uint16_t value... I would like to scale that down by a factor of 208.3 
> (adc_generic_val1 / 208.3) and give a return in 2 decimal float number.
>
> How and where would I do that?
>
>
> Thanks
> Brendan
>
>
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