* @param[in] pin The pin number to setup [0-15].
* @param[in] pull_up TRUE to setup pin as pull-up (a switch-to-ground device
* is connected) or FALSE to setup as pull-down
* @param[in] pin The pin number to setup [0-15].
* @param[in] pull_up TRUE to setup pin as pull-up (a switch-to-ground device
* is connected) or FALSE to setup as pull-down