On Fri, Nov 25, 2011 at 6:01 AM, Shubhrajyoti Datta <[email protected]> wrote: > Hi , > > On Thu, Nov 24, 2011 at 7:40 PM, Wayne Tams <[email protected]> wrote: >> Hi, >> >> I'm not sure if I have a problem here or not? >> >> I have been trying to verify my SPI bus on my master device to ensure >> it is functioning correctly. > > What is the platform?
i.MX53, the SoC is part of a SoM called DIMM-MX53 > >> I can verify that MOSI, SS and the CLK > How did you verify this? I have placed an oscilloscope on each of three pins and I can the SPI transaction on MOSI, clock and chip select, I am waiting on getting use of a data analyser but I am confident that what I am saying on the scope is a correctly formatted spi message that is generated by spidev_test.c > > >> are functioning. To verify MISO I have tied MOSI to MISO and tried > > Of the same bus? Do you have any other instance of the SPI to test? Yes of the same bus spi1_mosi to spi1_miso, there is just this instance available. > >> running spidev_test.c. When the two are tied together MISO appears to >> be pulling MOSI permanently low and I can longer see the SPI message >> on the scope. spi_test.c then displays all 0x00 for all the reads. >> >> Is my loop-back implantation incorrect or am I looking for another >> cause of the problem? >> >> Thanks >> >> Wayne >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> spi-devel-general mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/spi-devel-general >> ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
