GPIO documentation for UP Board
I am writing software that will control devices via GPIO in UP Board (UPC-CHT01-A10-0232).
Could I ask for documentation describing GPIO ports?
I particularly mean the numbering which pin on the PCB corresponds to which SYSFS number. For example, I want to initialize pin 3 on header and what number should I enter in echo XX> /sys/class/gpio/export
I spend a lot of time to find this information, but lot of links move to http 404 error or site has content "comming soon" or describe not exactly my kit and are useless.