What controls red LED9 keep alive

[abregnsbo]

What Linux software controls the red LED9 which makes a double blink every 1.3 second on STEMlab125-14 ?

[abregnsbo]

Looking around in the file system I found the following in /opt/redpitaya/dtraw.dts:

led-system {
compatible = "gpio-leds";

led-8-yellow {
default-state = "off";
gpios = <0x7 0x0 0x0>;
label = "led8";
linux,default-trigger = "mmc0";
};

led-9-red {
default-state = "off";
gpios = <0x7 0x7 0x0>;
label = "led9";
linux,default-trigger = "heartbeat";
};
};

[redpitaya]

Hello abregnsbo,

Thank you for writing on the forum and sorry for the late reply.

The Heartbeat LED is controlled by Linux. The dtraw.dts file is the most likely to turn it off.

Otherwise, you can read more about controlling LEDs and GPIO through Linux here:
https://redpitaya.readthedocs.io/en/lat ... o-and-leds