From Technologic Systems Manuals
On all of our baseboards we include 2 indicator LEDs which are under software control. You can manipulate these using "ts4200ctl --greenledon --redledon" or "ts4200ctl --greenledoff --redledoff". The LEDs have 4 behaviors from default software.
|Green Behavior||Red behavior||Meaning|
|On||On for about .5s, off for 5s, on for 1s, off||After the red LED stays off the system has booted and is running.|
|On||Off||System is booted and running.|
|On||On for approximately 15s, then off||Once the system has booted the kernel and executed the startup script, it will check for a USB device and then determine if it is a mass storage device. This is used for updates/blasting through USB. Once it determines this is not a mass storage device the red LED will turn back off.|
|On for 10s, off for 100ms, and repeating||Turns on after Green turns off for 300ms, and then turns off for 10s||The watchdog is continuously resetting the board. This happens when the system cannot find a valid boot device, or the watchdog is otherwise not being fed. This is normally fed by ts4200ctl once a valid boot media has started. See the #Watchdog section for more details.|
|Off||Off||The FPGA is not able to start. Typically either the board is not being supplied with enough voltage, or the FPGA has been otherwise damaged. If using an off the shelf baseboard and a stable 5V is being provided and the supply is capable of providing at least 1A and 5V to the macrocontroller, an RMA is suggested.|