I have a problem with configuring SPI on the Jetson Nano development board. Hopefully, anyone here can help me out with solving this problem. I have tried the following: First I executed the following commands: $ sudo find /opt/nvidia/jetson-io/ -mindepth 1 -maxdepth 1 -type d -exec touch {}/__ini…

Did you load spidev driver first. sudo modprobe spidev [image] jvachteren: can't open device: No such file or directory

Please update to J4.6 or latest and use jetson-io to configure the SPI and short the pin19/21 to run the loopback test by spidev_test to confirm it.

@ShaneCCC Thanks for your reply. I don’t think I had Jetpack installed in the first place, so that is one step further. I disabled spi1. rebooted the Jetson, enabled it again, rebooted it, and shorted pin 19 and 21. This is the output of the spidev_testc [Screenshot_2] I don’t think it works. I …

I mean update your BSP to J4.6 What’s below show cat /etc/nv_tegra_release sudo cat /sys/kernel/debug/tegra_gpio

@ShaneCCC I executed the commands and the following is visable: [Screenshot_3]

The pin status is correct. Could you check the loopback test by spidev_test?

Hey @ShaneCCC , I really appreciate your fast response. I tried running the spidev_test and it gave me the same error. I could hook it up to an oscilloscope if that would be more conveniënt? [Screenshot_4] This is the wiring [0005]

The pin19/21 should be the spidev0.0 instead of spidev2.0 What below command shows up, below are the correct configure. sudo cat /sys/kernel/debug/tegra_pinctrl_reg | grep -i spi Bank: 1 Reg: 0x70003050 Val: 0x0000e044 -> spi1_mosi_pc0 Bank: 1 Reg: 0x70003054 Val: 0x0000e044 -> spi1_miso_pc1 Bank…

Here’s my test result. nvidia@nvidia-desktop:~$ cat /boot/extlinux/extlinux.conf TIMEOUT 30 DEFAULT JetsonIO MENU TITLE L4T boot options LABEL primary MENU LABEL primary kernel LINUX /boot/Image INITRD /boot/initrd APPEND ${cbootargs} root=/dev/mmcblk0p1 rw rootwait rootfs…

Hey @ShaneCCC , I see some different values here. [Screenshot_1] Bank: 1 Reg: 0x70003050 Val: 0x0000e044 -> spi1_mosi_pc0 Bank: 1 Reg: 0x70003054 Val: 0x0000e044 -> spi1_miso_pc1 Bank: 1 Reg: 0x70003058 Val: 0x0000e044 -> spi1_sck_pc2 Bank: 1 Reg: 0x7000305c Val: 0x0000e048 -> spi1_cs0_pc3 Bank: 1…

The settings do look the same cat /boot/extlinux/extlinux.conf TIMEOUT 30 DEFAULT JetsonIO MENU TITLE L4T boot options LABEL primary MENU LABEL primary kernel LINUX /boot/Image INITRD /boot/initrd APPEND ${cbootargs} quiet root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 co…

Jetson Nano trouble using SPI

Robotics & Edge Computing Jetson Systems Jetson Nano

ShaneCCC November 25, 2021, 12:16pm 13

Could you verify by attached tool.

sudo mv spidev_test.txt spidev_test
sudo chmod +x spidev_test

Spi slave problem ，the received information cannot exceed 256 bytes

Cannot process SPI Slave Communication In JP 6.0

Enable SPI1 as Slave on Jetson Orin NX

Jetson Nano trouble using SPI

SPI communication failed

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Jetson Nano trouble using SPI

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