Invengo XC-RF868, Руководство пользователя

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4) GPIO
GPIO of the reader includes GPIO trigger reading and GPIO control.
GPIO has 4 trigger reading input ports, including GPIO1/2/3/4. Before triggering
reading, set “Trigger reading condition, stop condition and scanning parameter
configuration”. The specific settings include:
Trigger reading conditions: No trigger, rising edge, falling edge.
Stop conditions: Delay stop, stop according to IO (triggered reverse level).
Scanning parameter configuration mainly includes antenna number, TID data
length, start address of user data and user data length, as shown in Figure 6.12.
Figure 6.12 GPIO Trigger
In the four-channel GPIO triggered reading, as long as the “scanning
parameters” of any channel are configured, the scanning parameter configuration
of the other three channels will be the same.
GPIO control includes input status and output settings. The level status (high
level or low level) of current input port can be queried through the input status.
The output settings can control the short circuit or open circuit function of the
output port, as shown in Figure 6.13 below.