The AM3358 does not support tri-state on GPIO pins. Gerald
On Mon, Jul 6, 2015 at 4:24 PM, <drhunter1...@gmail.com> wrote: > Hello All, > > I've have a BeagleBone Black connected with SPI0 to an FPGA and also to > it's configuration flash memory device on a cape we are developing. On > power up, the FPGA will configure correctly from the serial. (SPIDEV0 is > not enabled in the device tree). I can also reprogram the flash with SPI0 > at this point. The idea is that either the BBB or the FPGA will talk to > the flash and the other will be tri-stated. > > I'm using the Adafruit_BBIO driver to communicate with the FPGA over SPI0 > (using Python). > > The issue I have is that when I exit the Python program, the SPI0 pins are > still configured for SPI (even after using the SPI.close() function in the > program). I'm looking at the cape manager slots after the program exits > and SPIDEV0 is now loaded. After that, I'm not able to re-configure the > FPGA because the SPI lines are being driven by the BBB. > > The question is: Is it possible to tri-state the SPI0 lines or switch the > SPI0 lines back to GPIO inputs before I exit the python program? > > Any insight is appreciated. > > Thanks, > Dave > > David Hunter > Sr. Electrical Engineer > SkuTek Instrumentation > W. Henrietta, NY > > -- > 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 beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- Gerald ger...@beagleboard.org http://beagleboard.org/ -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
