04-01-2016, 07:15 AM
I am curious about what the purpose of the LED next to the charge LED on the board is. On the pin-out diagram of the expansion connector it is identified as System LED.
(04-01-2016, 07:15 AM)stephen fleming Wrote: [ -> ]I am curious about what the purpose of the LED next to the charge LED on the board is. On the pin-out diagram of the expansion connector it is identified as System LED.
(04-01-2016, 10:51 PM)tllim Wrote: [ -> ](04-01-2016, 07:15 AM)stephen fleming Wrote: [ -> ]I am curious about what the purpose of the LED next to the charge LED on the board is. On the pin-out diagram of the expansion connector it is identified as System LED.
This LED is software programmable, and no dedicate assigned function.
(echo heartbeat >/sys/class/leds/green_led/trigger ; sleep 60 ; echo none >/sys/class/leds/green_led/trigger) &
(04-02-2016, 04:15 AM)Andrew2 Wrote: [ -> ](04-01-2016, 10:51 PM)tllim Wrote: [ -> ](04-01-2016, 07:15 AM)stephen fleming Wrote: [ -> ]I am curious about what the purpose of the LED next to the charge LED on the board is. On the pin-out diagram of the expansion connector it is identified as System LED.
This LED is software programmable, and no dedicate assigned function.
Please consider telling us to which pin it is connected, then using longsleep's minimal Ubuntu image, define it in the .dts file and then put something like
in /etc/rc.local. This way you could provide a small 'DOA-or-not.img' every user can use to see whether the board boots at least or not.Code:(echo heartbeat >/sys/class/leds/green_led/trigger ; sleep 60 ; echo none >/sys/class/leds/green_led/trigger) &
(04-03-2016, 10:04 AM)longsleep Wrote: [ -> ]Mhm ok, but where is the actual LED? Especially "purpose of the LED next to the charge LED on the board" . I can't see it - Please mark eg. in https://www.stdin.xyz/media/arm-board-party-1.jpg
(04-03-2016, 11:08 AM)stephen fleming Wrote: [ -> ]
The LED in question is located right next to the charge LED(marked Chgled) and is just called LED on the board and System LED on the expansion connector pin out sheet.
(04-03-2016, 11:12 AM)longsleep Wrote: [ -> ]Yes, the software programmable and charge LEDs are optional and are not installed on the board. When my board arrives, I plan on wiring up the LEDs and the power and reset switches.(04-03-2016, 11:08 AM)stephen fleming Wrote: [ -> ]
The LED in question is located right next to the charge LED(marked Chgled) and is just called LED on the board and System LED on the expansion connector pin out sheet.
No LED that i can see. I suppose you mean the (unused) PINs at the very bottom.