1- How to configure BSP files to enable SPI?
2- How to Test SPI?
Hardware: DSBOARD-NX2 with Jetson Nano
OS: Jetpack 4.6
In this blog post, we will use SPI port which is on the extension connector. First we will flash the module which includes BSP files. Then, we will copy test file to Jetson. Afterwards, we can build test file and execute it.
Open the target HW image folder.
Download SPI BSP files from here & extract it.
Copy files that mentioned below to the directories inside JetPack-4.6.
Move the Image file inside to ./kernel/ directory and overwrite on the file that exist before.
Move the DTB file inside to ./kernel/dtb directory and overwrite on the file that exist before.
Attention: If you use one of the previous DSBOARD-NX2 (rev-1.0, 1.1 & 1.21) carrier boards, please use the DTB file from the “without_fan” folder.
Return to the “Linux_for_Tegra” folder and open a Terminal.
Type "lsusb" and check the device connected in Recovery mode (0955:7f21 NVidia Corp.)
After this step, you can flash the module with the command below.
sudo ./flash.sh jetson-nano-emmc mmcblk0p1
When the flash is successfully done, the module will reboot and open itself.
First, we need to connect MOSI to MISO pins with a jumper. Below image shows connector’s pinout.
After that, we need to download spidev_test file from here and extract it.
Then, go to file destination, open a terminal there. Compile this file & enable the spidev module using below commands:
gcc spidev_test.c -o spidev_test
sudo modprobe spidev
After this step, use below command to test SPI:
sudo ./spidev_test -D /dev/spidev0.0
Thank you for reading our blog post.