Model 2450 Interactive SourceMeter® Instrument Reference Manual
Section 8: TSP command reference
2450-901-01 Rev. B/September 2013
8-45
digio.line[N].state
This function sets a digital I/O line high or low.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Not applicable
Nonvolatile memory
See
Details
Usage
digio.line[
N
].state =
state
state
= digio.line[
N
].state
N
Digital I/O trigger line (1 to 6)
state
Set the line low:
digio.STATE_LOW
or
0
Set the line high:
digio.STATE_HIGH
or
1
Details
When a reset occurs, the digital line state can be read as high because the digital line is reset to a digital input
(see the mode command). A digital input floats high if nothing is connected to the digital line.
Set the state to zero (
0
) to clear the bit; any non-zero value sets the bit.
Example
digio.line[1].mode = digio.MODE_DIGITAL_OUT
digio.line[1].state = digio.STATE_HIGH
Sets line 1 (bit B1) of the digital I/O port high.
Also see
(on page 8-43)
(on page 8-45)
(on page 8-46)
(on page 3-62)
(on page 8-171)
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 digital I/O line 1; bit B6 corresponds to digital I/O line
6.
For example, a returned value of 42 has a binary equivalent of 101010, which indicates that lines 2, 4, 6 are high
(1), and the other lines are low (0).
