>Jonathan Cameron wrote on 2010-11-30: >>> From a generalization point of view we don't care that the square wave >>> is a random bonus option the part happens to be able to kick out. >>> Ideally we want a naming scheme that makes it's relationship to the >>> other waveforms apparent though and it's not entirely obvious how to >>> handle that (e.g. how to handle the double frequency square wave this >>> part can produce). Things will get more fun if parts have multiple >>> outputs tied to one dds channel. >> >> Actually that's the case here on the AD9834. The signbit is an >> independent output. It therefore can't be handled with the > dds0_wavetype file. > Then have dds0_wavetype0 (sine triangle) and dds0_wavetype1 (square). > Document that the second index is only required if there are multiple > physical outputs from a given channel. How to disable dds0_wavetype1 (square)? (square off)? Not all combinations of dds0_wavetype0 (sine triangle) are allowed with the signbit output. >> It can be enabled/disabled while the DDS generates a sine wave on the >> main output. >> >> On the AD9833 the signbit square wave feature is routed to the DDS > main output. > Then that part just has the dds0_wavetype (triangle sine square) as > suggested above. That's how I implemented it for the AD9833 Greetings, Michael -- Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen Sitz der Gesellschaft Muenchen, Registergericht Muenchen HRB 4036 Geschaeftsfuehrer 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
