Advantech MIO-2270, Руководство пользователя

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47 MIO-2270 User Manual
Chapter 4
S
/W Introduction
and
Installation

GPIO Pin Selection
– In Single-Pin mode , users can set and access one pin at a time. Select the
pin number from the Pin number menu to set the pin and obtain its individual
value. Pins are numbered from 0 to the total number of GPIO pins minus 1.
– In Multi-Pin mode , users can set and access the entire bank of pins simulta-
neously. Select the pin bank number from the Bank number menu to set and
obtain the values for an entire bank pins.
 Supported Inputs/Outputs for GPIO Pins
– The supported inputs and outputs data indicate whether each pin is available
or controllable as an input or output. A value of 1 indicates that the specified
transmission direction is supported. In the example screenshot provided
above, the board only supports eight GPIO pins in Bank 0.
 Mask for GPIO Pins
– Masks are used to define which pins are enabled (Bit 1) or disabled (Bit 0) for
setting or obtaining the direction and level.
– Before setting the direction and level of GPIO pins, mask values should be
specified. Zero cannot be set as the value for all masks.
 Direction Setting
– The Direction value specifies the I/O direction of each pin; 1 denotes input
and 0 denotes output.
– Click the <Set/Get> button to set/get the Direction value.
 Level Setting
– The Level value specifies the pin level; 1 denotes high level and 0 denotes
low level.
– Click the <Set/Get> button to set/get the Level value. If a pin direction is set
as 1, the Level value cannot be specified.