SPI cs1 doesnot operate

hyunbin
hyunbin New Member Posts: 2 ✭
in UP Xtreme i12 Troubleshooting and FAQs

I am using up xtreme i12 and i have to use spi communication.
When I use my code in upboard, spidev2.0 spidev2.1 were operated well.
But, in i12, when I input ls /dev in linux, there are spidev1.0 and spidev1.1. so I used that devices,
However, the cs0 pin operates well while cs1 pin does not operates. when I used oscilloscope, the cs1 pin always show low state.
How can I use cs1 pin? is there any problem at pinctrl. deb ?

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Answers

  • HarryChiu
    HarryChiu New Member Posts: 230 ✭✭✭

    Hi @hyunbin

    Sorry for late reply.

    Could you please provide more information??
    What is your OS, version of kernel and bios??

    Best Regards,
    Harry Chiu

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  • Jiwook
    Jiwook New Member Posts: 1 ✭

    @HarryChiu The same thing happens to me too. The OS is ubuntu 22.04 and the kernel version is 6.5.0-18. Is there any way to solve this?

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  • HarryChiu
    HarryChiu New Member Posts: 230 ✭✭✭
    edited June 2024

    Hi @Jiwook, @hyunbin

    We have discovered this problem and will fix it in a later version of the Pinctrl.
    Currently, CS1 can be treated as GPIO7 for control, which will not affect the SPI function.

    Best Regards,
    Harry Chiu

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