Output – B&K Precision 9171-9174 - Manual User Manual
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For example, suppose all pins are set as
INPUT pins, but only pin 2
and 1 have a 5 V logic high (1) signal, then only these two pins
return “
1” and the rest “0”. Sending GPIO? command will return: 3.
The complete 8-bit binary would be
00000011.
Pin
9
8
7
6
5
4
3
2
1
0
0
0
0
-
0
0
1
1
Note if there are output pins configured, those pins are ignored and
will have the value “
0”.
OUTPUT
To setup any of the 8 pins (except pin 5) as output pins, the remote
command
GPIO:DIR is used. All pins (except pin 5) are represented
as 8-bits binary, according to Table 5 above. A “
1” represents
OUTPUT, and a “0” represents INPUT. When using the GPIO:DIR
command, the decimal representation of the 8-bits binary is used.
For example, to set pins 8, 6, and 3 as
OUTPUT pins, their values
must be set to
1, and the rest 0. Send:
GPIO:DIR 84
84 is used to represent 01010100 in binary. Only pins 8, 6, and 3
have the value “
1”, which represents OUTPUT.
Pin
9
8
7
6
5
4
3
2
1
0
1
0
1
-
0
1
0
0
Digital output for representing logic high (1) is 5 V, and for logic low