The Loopback test only involves MISO and MOSI lines that leaves CS and CLK as potential source of errors. I have made some measurements with an oscilloscope and it shows two notable differences between 4.4 and 3.8:
- For 3.8 CS toggles between high and low. For 4.4 CS is always low after an short initial high period. Both scenarios should be correct for the SPI data transfer as I see it. - For 3.8 you can see how data is transferred in the clock cycles but for 4.4 the MISO line always remains low. What can cause this, how can I approach this issue further? -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/e65a1f0e-2c2c-4c73-8193-0455a6ebac68%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
