LED Blink Codes

BoneCrusher · August 26, 2021, 9:46pm

I am trying to find a document describing LED blink codes. There does not appear to be a section in the official manual. I figured out, with the help of Google, that Knight Rider pattern means eMMC is flashing.

Does anybody know what it means when all 4 LEDs are blinking: blink, blink, pause, blink blink, etc.

RobertCNelson · August 26, 2021, 9:47pm

github.com

beagleboard/BeagleBoard-DeviceTrees/blob/v4.19.x-ti-overlays/src/arm/am335x-bone-common.dtsi#L28-L54


      
          		led2 {
          			label = "beaglebone:green:usr0";
          			gpios = <&gpio1 21 GPIO_ACTIVE_HIGH>;
          			linux,default-trigger = "heartbeat";
          			default-state = "off";
          		};
          
          		led3 {
          			label = "beaglebone:green:usr1";
          			gpios = <&gpio1 22 GPIO_ACTIVE_HIGH>;
          			linux,default-trigger = "mmc0";
          			default-state = "off";
          		};
          
          		led4 {
          			label = "beaglebone:green:usr2";
          			gpios = <&gpio1 23 GPIO_ACTIVE_HIGH>;
          			linux,default-trigger = "cpu0";
          			default-state = "off";
          		};

This file has been truncated. show original

heartbeat | mmc0 | cpu0 | mmc1

Regards,

BoneCrusher · August 27, 2021, 2:40pm

Yes, those are individual LED designations. What does it mean when they all blink at the same time, in unison?

RobertCNelson · August 27, 2021, 2:41pm

If you were “flashing” the eMMC, it means, ERROR… attache your serial log and we can figure out what went wrong…

Regards,