Now supposedly you can use the PRU in the BBB to run as a separate microcontroller. I've been meaning to experiment but I have yet to get a BBB.
It would probably work by message passing. Where the micro would send a message to the linux kernal and then your user application could get the data. On Wednesday, June 17, 2009 8:00:50 AM UTC-4, John Lists wrote: > > Hi > > I would like to interface with an ADC slave device via SPI but not sure if > it is realistic. > > The ADC is externally clocked and alerts the master (the OMAP) that a > sample is ready for retrieval by pulling a DataReady line low. > The ADC pulls the DataReady line low every 19 us (52kSamples/s) and then > expects the Master to retrieve 96 bits from it with a 25MHz SCLK before the > next sample becomes ready. > > Is it possible/realistic to write a new kernel protocol driver that uses > the mcspi controller driver and be sure that the sample will be retrieved > every time before the 19us lapses? > > Basically my question is, what is the best/easiest way to ensure that the > OMAP retrieves all the data over SPI within 19us from when the DataReady > line has been pulled low by the ADC? > > Thanks in advanced, > > John -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
