Procedure for enabling and testing SPI on TX2 Jetpack 4.6.5

[felix76]

I need to enable and test one of the spi ports on the TX2 on the dev carrier board. I have used jetpack 4.6.5 to flash the latest image. I’ve used the jetson-io.py tools to enable the port SPi4 on J21 of the dev carrier board pins 19,21,23. I ran modprobe spidev.
$ ls /dev/spi*
/dev/spidev3.0 /dev/spidev3.1

Can I somehow install the user space tools available in later ubuntu versions? https://launchpad.net/ubuntu/+source/spi-tools

If not, is there a simple way to test the spi? Is there anything else I need to do? I found all sorts of information on line about modifying device tree, recompiling kernel etc but that seems to be out of date (hopefully).

Thanks in advance! Felix

[KevinFFF]

Hi felix76,

Please share the result of the following command on your board.

$ cat /etc/nv_tegra_release
$ cat /etc/nv_boot_control.conf

an also the full dmesg as file here for further check.

Have you tried to use Jetson-IO to configure the pinmux for SPI before use?

[felix76]

Okay. Echo seems to work as expected. sudo echo -e “\xA5” > /dev/spidev3.0

So presumably if I open from code I can read/write.

@KevinFFF Yes I did need to configure the pins with the jetson-io tool.

[KevinFFF]

It seems you get it working use echo command.
You can also use spidev_test tool to test SPI.