Toggling of GPIO4_IO23 on humming board pulse

[Kartheek]

Hi,

I want to toggle the gpio pin 119 attached in screen shot. But not able to toggle when i see on oscilloscope/multimeter. Can you please correct me if i am wrong?

I followed the below steps to toggle it.

1. echo 119 > /sys/class/gpio/export
2. echo out > /sys/class/gpio/gpio119/direction
3. echo 1 > /sys/class/gpio/gpio119/value
4. echo 0 > /sys/class/gpio/gpio119/value

Thanks,
Kartheek

[jnettlet]

What BSP image are you running?

[Kartheek]

Hi

Please see the metioned screen shot for Linux BSP version. And i have followed the steps mentioned in link for yocto

Thanks & Regards,
Kartheek

[jnettlet]

and what revision of the carrier are you using? The pin connected to the mikrobus changed between rev 2.3 and rev 2.5 carriers

[Kartheek]

May i know how to find the rev. I have rev 2.2, 2.3 & 2.5 downloaded from this link. And we are following rev 2.5.

[jnettlet]

You should be able to check the SKU, but otherwise it is silk screened onto the board underneath where the SOM is mounted.

[Kartheek]

Unable to find the rev. Attached board underneath image for your refernce. Can you please help me.

[jnettlet]

It is on the top of the board in between the SOM connectors. You need to remove the SOM to see it.