Model 2657A High Power System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012
7-59
Details
The binary representation of
data
indicates the output pattern to be written to the I/O port. For example, a
data
value of 170 has a binary equivalent of 00000010101010. Lines 2, 4, 6, and 8 are set high (1), and the other 10
lines are set low (0).
Write-protected lines are not changed.
The
reset()
function does not affect the present states of the digital I/O lines.
Use the
digio.writebit()
and
digio.writeport()
commands to control the output state of the
synchronization line when trigger operation is set to
digio.TRIG_BYPASS
.
Example
digio.writeport(255)
Sets digital I/O Lines 1 through 8 high (binary
00000011111111).
Also see
(on page 7-49)
(on page 7-50)
digio.writeprotect
This attribute contains the write-protect mask that protects bits from changes from the
digio.writebit()
and
digio.writeport()
functions.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Instrument reset
Recall setup
Saved setup
0
Usage
mask
= digio.writeprotect
digio.writeprotect =
mask
mask
Sets the value that specifies the bit pattern for write-protect
Details
Bits that are set to one cause the corresponding line to be write-protected.
The binary equivalent of
mask
indicates the mask to be set for the I/O port. For example, a mask value of 7 has a
binary equivalent of 00000000000111. This mask write-protects lines 1, 2, and 3.
Example
digio.writeprotect = 15
Write-protects lines 1, 2, 3, and 4.
Also see
Summary of Contents for 2657A
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