crystal User Manual
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18. GPIO
18.4
GNET (GPI/O Network)
GNET
elements, also known as
GPI/O Network
, can be used to exchange GPIO signals with other radio on-air
systems via the control network. The GPI/O Network works on the principle of ports in order to manage the
network traffic effectively. In the sending device, each element is assigned a port number. This must match the
port number defined in the receiving device. The same element/port can be used to send and receive signals if
you wish.
Power Core
supports two possible protocols for the GPI/O Network, either TCP or UDP. All other systems
support TCP only. The protocol is selected when you insert the GPI/O Network element.
To use UDP, both the sending and receiving device must be a Power Core. The advantages of using UDP
are that the exchange uses less bandwidth, reduces the CPU usage, and is simpler and faster.
In each case, there are two parts to the configuration. First, define the TCP/IP connections in both the sending
and receiving systems (via the “
System -> Definition -> Param = TCPLink
” branch of the 'Tree Definition'). Then,
add a GPI/O Network element to both the sending and receiving systems.
