SPI1 troubles
Forums › Reference, Evaluation, and Development Boards › OSD3358-SM-RED › SPI1 troubles
Tagged: spi
- This topic has 1 reply, 2 voices, and was last updated 5 years, 8 months ago by
Erik Welsh.
- AuthorPosts
- March 5, 2019 at 2:32 pm #7620
I am trying to use SPI1 with a program in C. I have followed the instructions on many posts. The posts are mostly old and still refer the device trees and slots. Added this line to /boot/uEnv.txt
uboot_overlay_addr0=/lib/firmware/BB-SPIDEV1-00A0.dtbO
That did not work. No spi devices show up in /dev. Without this line 4 spi devices show up in /dev, but they don’t seem to work. Scope on CS shows nothing.
- March 8, 2019 at 10:23 am #7627
You can find the source for all the overlays in the repository:
https://github.com/beagleboard/bb.org-overlays
If you look at the source for BB-SPIDEV1-00A0:
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-SPIDEV1-00A0.dts
you can see that it has not been updated to be compatible with the OSD3358-SM-RED:
1compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";You will need to modify the DTS to be compatible with “oct,osd335x”:
1compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green", "oct,osd335x";and then recompile. This will create a new DTBO file that you can use to replace the one in /lib/firmware We will look at getting the repository updated to add in the OSD3358-SM-RED compatibility to the applicable device tree overlays.
Then you should change which address you are using for the overlay to “addr4”:
1uboot_overlay_addr4=/lib/firmware/BB-SPIDEV1-00A0.dtboThis should resolve the issue and allow you to use /dev/spidev1.0
- AuthorPosts
- You must be logged in to reply to this topic.