On Thu, Apr 6, 2017 at 7:24 AM, George McCollister <george.mccollister@xxxxxxxxx> wrote: > In many industrial applications it's common to mix digital (binary) > and analog I/O. In many cases digital input modules have change > buffers and sometimes event time stamping capabilities. While the gpio > subsystem can support software timestamping and buffering it doesn't > fit well for many industrial digital applications where the host > process reads buffered digital samples or events from input modules. > > Would anyone appose or support the addition of digital channel type or > suggest an alternative path to supporting this use case? > > A possible alternative is to use 1 bit for storage and use voltage for > type. For instance a 16 channel 24V DC Input module would present 16 > input voltage channels with 1 bit of storage each. 0 would correspond > to 0VDC and 1 to 24VDC. I don't think IIO_VOLTAGE should be used for this since it is against the ABI definition. At the worse it should be reported as 0V and 24V, but I think using the events is a better solution. IIO_EV_DIR_RISING -> 24V IIO_EV_DIR_FALLING -> 0V > > Cheers, > George McCollister > Software Architect > NovaTech LLC > -- > 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 -- 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
