LED for eMMC

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Hello,
I want to use a LED indicator to show the eMMC is working(Like HDD LED blinking).
However, it looks no pin from Jetson Nano/Jetson Xavier NX for this feature.
Is it possible to use a GPIO to achieve this one?

Thanks.
Wayne.

3

hello wayne_liao,

did you need LED blinking for read/write files?
may I have more details about what exactly you need for “to show the eMMC is working”,
thanks

4

Hi Jerry,
Yes, LED blinking for eMMC read/write files.

Thanks.

5

hello wayne_liao,

you may have some implementation to trigger high/low for GPIO pins in the memory controller.
please check Xavier Technical Reference Manual, you should refer to [Chapter-10 Low-Speed I/O]—> [SDMMC Controller] for more details.
please also refer to Topic 144550, for several ways to access GPIOs. such as, kernel APIs, python scripts, C++ samples.
thanks

6

Hi Jerry,
Got it,
Thanks for the information.

Wayne

7

Sorry, another question.
It is the same way to implement this feature in Jestson Nano?
Thanks.

Wayne

8

hello wayne_liao,

please have implementation in the memory controller,
I’ve never tired this before, but it should works by trigger GPIO state changes from kernel side to have LED blinking.
thanks

9

Hi Jerry,
OK, we will try it.
Thanks a lot.

Wayne.