How to use the 36 pin on the J40 pin to wake the nano from sleep？

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hello, I am using the jeston nano B01 development kit and need to wake the nano from sleep using one of the J40 pins (J36) to receive a low level signal to trigger the wake up. Now using GPIO3_PG.03, cannot wake up。

3

Hi wglbit,

What’s your Jetpack version in use?

Could you help to provide the result of the following commnad?

$cat /sys/kernel/debug/gpio|grep PG.03

$sudo busybox devmem 0x70000b2c
4

Jetpack version 4.6.1
$cat /sys/kernel/debug/gpio|grep PG.03 no output;
$sudo busybox devmem 0x70000b2c output :0x00000000

5

Could you help to update to latest JP4.6.3 to verify?
Have you configured the pinmux for this pin(PG.03)?

6

Okay, I have upgraded the system to JP4.6.3 using SDK manager. The relevant settings can be found in the reference: Jetson/FAQ/BSP/Nano Wakeup Pin - eLinux.org . However, it still doesn’t work. Can you provide specific modification methods?

7

Now, PG.03 has other uses, I want to use PE.06 as a wake-up pin, but I don’t know how to configure Pinmux, for PG.03 example:
uart2_cts_pg3 {
nvidia,pins = “uart2_cts_pg3”;
nvidia,function = “rsvd2”;
nvidia,pull = <TEGRA_PIN_PULL_UP>;
nvidia,tristate = <TEGRA_PIN_DISABLE>;
nvidia,enable-input = <TEGRA_PIN_ENABLE>;
};

8

Do you refer to every steps in this instruction and PG.03 could be used as wake up pin?

Do you mean that you want to use PE.06 as wake-up pin instead of PG.03?

9

Yes, I can now use PE.06 as the wake source, but the following prompt window will appear after external wake up, how to solve?
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10

Could you help to provide the serial console log during wake up?

Do you have any application opened before sleep?

11

The wake-up pin level of the serial port is a continuous high and low level. The serial port analysis program runs normally before sleep, but the above situation occurs after wakeup.

12

I’m closing this topic due to there is no update from you for a period, assuming this issue was resolved.
If still need the support, please open a new topic. Thanks

Do you mean that the level of wake-up pin is unstable?

Could you help to stop all applications before sleep and check if there’s still prompts after waku up?