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Section 4: Triggering Series 2600B System SourceMeter® instrument Reference Manual

4-46 2600BS-901-01 Rev. F/August 2021

Using TSP-Link trigger lines for digital I/O

Each trigger line is an open-drain signal. When using the TSP-Link

trigger lines for digital I/O, any

node that sets the programmed line state to zero (0) causes all nodes to read 0 from the line state.

This occurs regardless of the programmed line state of any other node. Refer to the table in Digital

I/O bit weighting (on page 4-41) for digital bit-weight values.

Remote TSP-Link trigger line commands

Commands that control and access the TSP-Link

trigger line port are summarized in the following

table. See the TSP command reference (on page 9-1) for complete details on these commands. See

the table in Digital I/O bit weighting (on page 4-41) for the decimal and hexadecimal values used to

control and access the digital I/O port and individual lines.

Use the commands in following table to perform basic steady-state digital I/O operations; for example,

you can program the 2600B to read and write to a specific TSP-Link trigger line or to the entire port.

The TSP-Link trigger lines can be used for both input and output. You must write a 1 to all TSP-Link

trigger lines that are used as inputs.

Remote trigger line commands

Command

Description

tsplink.readbit(bit)

Reads one digital I/O input line.

tsplink.readport()

Reads the digital I/O port.

tsplink.writebit(bit, data)

Writes data to one digital I/O line.

tsplink.writeport(data)

Writes data to the digital I/O port.

tsplink.writeprotect = mask

Sets the write-protect mask of the digital I/O port.

Programming example

The programming example below illustrates how to set bit B1 of the TSP-Link digital I/O port high,

and then read the entire port value:

-- Set the TSP-Link trigger line to the trigger bypass mode.

tsplink.trigger[1].mode = tsplink.TRIG_BYPASS

-- Set bit B1 high.

tsplink.writebit(1, 1)

-- Read I/O port.

data = tsplink.readport()

Tektronix KEITHLEY 2600B Series User Manual

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