How to open the cs1 of spi1 on the Jetson TX2 NX platform

Excuse me: How to open cs1 in spi1 on Jetson TX2 nx
Current work carried out:
The SPI feature was opened by running Jetson io.py
The driver for Spiev has been loaded, and communication with Spi1 has been verified by shorting MISO and MOSI and running Spiev_test
Question: When running Jetson io. py and setting spi1, why does it not include pin26 (corresponding to cs1)
The picture is as follows:
spi

Hi 478723668,

Are you using the devkit or custom board for TX2?
What’s your Jetpack version in use?

Jetson-IO is used to configure the pinmux register.
For CS pin, it is just the IO pin to decide which SPI device should be communicated with.
I think it would be fine w/o showing pin26 (SPI1_CS1) in Jetson-IO.

Is there any issue when you are using SPI1_CS1?

HI KevinFFF
I am using Jetpack 4.6.4. For tx2 nx, jetson-io does not display pin26, but jetson-io corresponding to xaiver nx is displayed.
I checked the forum and found this: SPI1_CS1 Removed on Tx2?
Does SPI1_CS1 in tx2 nx also need to be bound to GPIO for use?

It seems an old post and the result is the same as I mentioned before that you can configure SPI1_CS1 as GPIO in pinmux and it should work.
CS is a IO pin controlled by SPI driver when it wants to communicate with specific device.

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.