Eurotech BoltGATE 20-25, Руководство пользователя

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10 How to Access the Interfaces Under Linux BoltGATE 20-25 User Manual Rev. 1-1
10.9 Digital I/O
The BoltGATE 20-25 exposes the Digital I/Os (GPIOs) as follows:
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Digital Input 1:
/dev/digital_in1/value
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Digital Input 2:
/dev/digital_in2/value
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Digital Input 3:
/dev/digital_in3/value
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Digital Input 4: /dev/digital_in4/value
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Digital Output 1:
/dev/digital_out1/value
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Digital Output 2:
/dev/digital_out2/value
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Digital Output 3:
/dev/digital_out3/value
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Digital Output 4: /dev/digital_out4/value
To set ON/OFF a Digital Output (for example Digital Output 1), enter the following commands:
#set the Digital Output to ON
echo 1 > /dev/digital_out1/value
#set the Digital Output to OFF
echo 0 > /dev/digital_out1/value
To read the state of a Digital Input (for example Digital Input 1), enter the following command:
#read the state of a Digital Input
cat /dev/digital_in1/value
The reply to the command is the following:
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If the Digital Input is ON, you will obtain the value "1"
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If the Digital Input is OFF, you will obtain the value "0"
To read the state of a Digital Output (for example Digital Output 1), enter the following command:
#read the state of a Digital Outpu
cat /dev/digital_out1/value
The reply to the command is the following:
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If the Digital Output is ON, you will obtain the value "1"
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If the Digital Output is OFF, you will obtain the value "0"
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