Jonathan Cameron wrote on 2011-09-15: > On 09/15/11 16:04, michael.hennerich@xxxxxxxxxx wrote: >> From: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Sorry, I must be dozing, why can't this be covered by the _offset > equivalent? Admittedly it will then be tied up with the _scale > parameter changing, but surely with a bit of care this can still be done? > > As I read it, with this we would have > > X_input = (X_raw + X_offset)*X_scale + X_bias ? > > Can be transformed with care to > > X_input = (X_raw + X_offset + X_bias/X_scale)*X_scale > > Annoying to do, but still it would keep us in line with current abi. > > We could do this, but I'm unclear on whether it is justified. > > Please argue your case! Hi Jonathan, We talked about this in the 'Re: IIO: Interface for capacitance inputs (and outputs)' email thread we had some time ago. And I think you agreed on the _bias introduction. The idea was to use _bias for the CAPDACs on the CDC devices. But you are right, we could use _offset here too, if we eliminate _scale form the value. Greetings, Michael -- Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen Sitz der Gesellschaft: Muenchen; Registergericht: Muenchen HRB 40368; Geschaeftsfuehrer:Dr.Carsten Suckrow, Thomas Wessel, William A. Martin, Margaret Seif -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
