pepopifaceはRaspberry piのPiFace Digital I/O Expansion Boardを制御するコマンドです。
o 2013.07.20 ,1st release.
o 2013.9.5 ,to match the input state of piface, modified to highlight the port data.
o 2014.12.21 ,add an exclusive processing.
o 2014.12.26 ,read & write command return value bug fixes