Hey, I am trying to use GPIO as input trigger to my system. I am using shell command before I am running my code: echo in >/sys/class/gpio/gpio443/direction echo falling >/sys/class/gpio/gpio443/edge and also a C code: void gpio_test() { if ((fd = open("/sys/class/gpio/gpio443/val…

There is no update from you for a period, assuming this is not an issue any more. Hence we are closing this topic. If need further support, please open a new one. Thanks hello almog1, would you please use $ nice to set higher process priority to confirm the behavior? thanks

Hey Jerry, I have tried to use attached commands: sudo su cat /sys/kernel/debug/bpmp/debug/clk/axi_cbb/max_rate # 408000000 cat /sys/kernel/debug/bpmp/debug/clk/axi_cbb/max_rate > /sys/kernel/debug/bpmp/debug/clk/axi_cbb/rate echo 1 > /sys/kernel/debug/bpmp/debug/clk/axi_cbb/mrq_rate_locked cat…

[image] almog1: I am still get the interrupt with ~15ms latency. may I know how you evaluate 15ms latency, are you probing the signal or adding kernel logs to check the timestamp?

Hey Jerry, You right, Actually I have checked it via log file. In case of checking it with oscilloscope it actually works fine. Thank you

GPIO Interrupt latency

Robotics & Edge Computing Jetson Systems Jetson AGX Xavier

JerryChang December 10, 2021, 6:09am 3

hello almog1,

could you please check Topic 192147 for the steps to improve GPIO interrupt performance.
thanks

Topic		Replies	Views
What is GPIO interrupt latency in C++ app and how to minimize Jetson Nano gpio	2	600	October 15, 2021
GPIO interrupt latency seems long Jetson Nano	2	768	October 14, 2021
Low Latency IO GPIO interrupt Jetson Nano gpio	4	1090	April 9, 2023
How much is the toplimit frequency of GPIO catch the pluse by interrupt? Jetson Nano gpio	22	935	December 7, 2022
GPIO Interrupts Jetson TX1	12	6619	October 18, 2021
Interrupts every 1ms? Jetson AGX Xavier gpio	2	681	July 25, 2022
GPIO as an interrupt Jetson AGX Xavier gpio	2	1052	October 18, 2021
Not getting all Interrupts Jetson Xavier NX gpio	14	3223	November 17, 2021
What GPIO output latency is typical on a Jetson Nano? What can affect this latency? Jetson Nano gpio	2	1134	March 21, 2022
Xavier NX GPIO Accurate Jetson Xavier NX gpio	2	369	October 11, 2022

GPIO Interrupt latency

Related topics