On 06/17/2009 08:21 AM, John Lists wrote: > Hi > > I would like to interface from an OMAP3530 running linux 2.6.29 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?
I just saw that you posted to this ML also. See my response on: [email protected] -- Ned Forrester [email protected] Oceanographic Systems Lab 508-289-2226 Applied Ocean Physics and Engineering Dept. Woods Hole Oceanographic Institution Woods Hole, MA 02543, USA http://www.whoi.edu/ http://www.whoi.edu/sbl/liteSite.do?litesiteid=7212 http://www.whoi.edu/hpb/Site.do?id=1532 http://www.whoi.edu/page.do?pid=10079 ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
