Jetson-IO flash back on Jetson Xavier NX (EMMC 8GB, jetpack4.62) for SPI using

[Xml301]

Does Jetpack 4.62 and eMMC 8g versions of Jetson Xavier NX support spi?
After connecting the display screen, I open the terminal and try the following commands:

sudo /opt/nvidia/jetson-io/jetson-io.py

But the interface flashes back, so enter the following command

sudo /opt/nvidia/jetson-io/config-by-pin. py | less
sudo /opt/nvidia/jetson-io/jetson-io. py | less

Error: No DTB found for NVIDIA Jetson Xavier NX Developer Kit!
But I found this file in the boot/dtb folder: kernel_ tegra194-p3668-all-p3509-0000.dtb
At the same time, I tried the following two instructions:

cat /sys/firmware/devicetree/base/compatible
fdtget /boot/dtb/kernel_ tegra194-p3668-all-p3509-0000.dtb / compatible

The returned results are the same:
nvidia,p3449-0000+p3668-0000nvidia,p3449-0000+p3668-0001nvidia,p3509-0000+p3668-0000nvidia,p3509-0000+p3668-0001nvidia,tegra194
Can someone tell me how to open the SPI?

[WayneWWW]

There is a known issue in cboot that may cause jetson IO fails to take effect.

Cboot in 32.7.2 fails to read extlinux.conf

Please try this within your cboot, reflash the cboot and it shall work with extlinux.conf. diff --git a/lib/fs/ext4/ext4.c b/lib/fs/ext4/ext4.c index c994c0f..6e8e2e7 100644 --- a/lib/fs/ext4/ext4.c +++ b/lib/fs/ext4/ext4.c @@ -244,6 +244,9 @@ uint8_t *buf_ptr = NULL; off_t total_bytes_read = 0; int err = 0; + uint32_t file_len_in_blocks = 0; + uint32_t total_blocks_read; + uint32_t block_size; LTRACE_ENTRY; @@ -254,6 +257,15 @@ } buf_ptr = (uint8_t …

[Xml301]

Thanks！The question has been solved！