Rainbow Electronics GM862-QUAD-PY - Manual (Page 77)

GM862-QUAD / PY Software User Guide
1vv0300747 Rev. 3 - 10/07/07
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For example:
1- Let's assume you want to set GPIO3 pin as Output and you want it to be in LOW status:
command:
AT#GPIO=3,0,1<cr>
response:
OK
In this case, the GPIO3 pin was successfully put in output direction and its status has been set to
LOW.
3.6.1.2 Setting GPIO pin as INPUT
When you set a GPIO as input, you must specify also a dummy value for the pin state:
•
Send command
AT#GPIO=<pin>,<dummy_value>,0<cr>
where:
<pin> is the GPIO pin number at which the command applies:
1 – GPI1 7 – GPIO7
8 – GPIO8
3 – GPIO3 9 – GPIO9
4 – GPIO4 10 – GPIO10
5 – GPIO5 11 – GPIO11
6 – GPIO6 12 – GPIO12
13 – GPIO13
<value> is a dummy value can be either:
0 – dummy value
1 – dummy value
•
wait for response OK
NOTE: The #GPIO setting for all GPIO except from GPIO4, GPIO5, GPIO6 and GPIO7, is not
saved and will be lost on power off, so at start-up repeat pin initialization commands.
At start-up all the GPIOs except from GPIO5, GPIO6 & GPIO7 are configured by default as
INPUT, but the setting for GPIO4, GPIO5, GPIO6 and GPIO7 instead is maintained even after a
shutdown to permit the Alternate feature to work always.
For example:
1- Let's assume you want to set GPIO4 pin as Input:
command:
AT#GPIO=4,0,0<cr>
response:
OK
In this case, the GPIO4 pin was successfully put in input direction.