Configurable pins manager, Overview, Default groups – Lantronix XPort AR User Manual
Page 60: Custom groups, Configurable pins
XPort AR User Guide
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8: Configurable Pins Manager
This chapter describes the function and configuration of configurable pins (CPs) by using the
Configurable Pins Manager (CPM).
This chapter contains the following sections:
Overview
Each CP is associated with an external hardware pin. CPs can be configured and used as digital
inputs or outputs.
When used as input, device functionality can be triggered based on the state of a CP. For
example, an email can be sent when a CP is asserted to a preconfigured level. When used as an
output, logic levels of the CP can be manipulated when a preconfigured event occurs on the
device server, such as when a tunnel connection is accepted.
CPs are configured and manipulated within a group. Each group is named and is referenced in the
feature that is triggering a CP or being triggered by a CP. Sophisticated use of CPs can be
accommodated by adding more than one CP into a group.
Default Groups
The XPort AR has several predefined CP groups used to assign a CP to a needed function. For
instance, when working with an RS485 driver that requires a signal to be asserted when in half–
duplex mode, the CP that is driving that signal (chosen by the engineer designing the circuit) is
added to the default group named Line1_RS485_HDpx. The XPort AR asserts the CP at the
correct time via the default group.
Custom Groups
The email, tunneling, and CLI features can interact with CPs. This is accomplished by creating a
custom group and adding CPs of your choice into that group. Once a CP group is created and
populated with one or more CPs, actions can be triggered when the CPs match a specified value.
CPs can be placed in any bit position within a group, allowing for sophisticated use of the available
CPs.
Configurable Pins
The CPM web page is used to experimentally configure the state of the CPs. CPs can be changed
to be a digital input or a digital output, and whether it is asserted high or low. Changes made on
this page do not persist through a reboot.
Rules for configuring a CP are as follows. A CP:
Can be in any number of groups.
Can be only in one active group. Two groups with the same CP cannot be enabled at the
same time.
Becomes locked and is not configurable if it is in an enabled group. Disable the group to
change the CP configuration.