Model 2651A High Power System SourceMeter® Instrument Reference Manual
Section 7: Command reference
2651A-901-01 Rev. A / March 2011
7-43
digio.readbit()
This function reads one digital I/O line.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function Yes
Usage
data
= digio.readbit(
N
)
data
A custom variable that stores the state of the I/O line
N
Digital I/O line number to be read (1 to 14)
Details
A returned value of zero (0) indicates that the line is low. A returned value of one (1) indicates that the line is
high.
Example
print(digio.readbit(4))
Assume line 4 is set high, and it is then read.
Output:
1.00
Also see
Digital I/O port
(on page 7-43)
digio.readport()
This function reads the digital I/O port.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function Yes
Usage
data
= digio.readport()
data
The present value of the input lines on the digital I/O port
Details
The binary equivalent of the returned value indicates the value of the input lines on the I/O port. The least
significant bit (Bit B1) of the binary number corresponds to line 1; Bit B14 corresponds to line 14.
For example, a returned value of 170 has a binary equivalent of 000000010101010, which indicates that lines 2,
4, 6, and 8 are high (1), and the other 10 lines are low (0).
