I am able to get *SPI0 *working on the BeagleBone Black by using only *config-pin* commands:
config-pin P9_17 spi config-pin P9_18 spi config-pin P9_21 spi config-pin P9_22 spi Then writing to */dev/spidev1.0 *causes data to come out the pins P9_18 (data) and P9_22 (clock). Note that searching for how to enable SPI on the BeagleBone returns tutorials that all involve *"device trees"* or a *"cape manager"*. None of this was necessary for me to get SPI working. I assume they used to be required at some point in the past. I simply set the pins to SPI and it works. Now I'd like to change some SPI settings, like the clock rate. It seems the hardware has a frequency divider that can be set to change the SPI clock rate. What is the clock rate by default? How can I change it? Ideally I'd like to change it by command with the BeagleBone running, hopefully no recompiling or rebooting required every time I make a change. How should I go about this? Note that I'm running the image *"bone-debian-8.6-iot-armhf-2016-10-16-4gb.img.xz"* found here: <goog_839341451> https://rcn-ee.com/rootfs/bb.org/testing/2016-10-16/iot/ -- 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/27c5885f-18fa-4864-8741-95c8bd6fcf21%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
