Keithley 2600a series - Page 359

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 19-37
Series 2600A System SourceMeter® Instruments Reference Manual Section 19: Remote Commands
digio.writeport
Function Writes to all digital I/O lines.
TSP-Link
accessibility
This function can be accessed from a remote TSP-Link node.
Usage digio.writeport(data)
data Value to write to the port; 0 to 16383.
Remarks • 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 will not be changed (see digio.writeprotect).
• 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 while the trigger mode is set to digio.TRIG_BYPASS.
Details See Controlling digital I/O lines in Section 8.
Also see digio.readbit, digio.readport, digio.writebit, digio.writebit
Example Sets digital I/O lines 1 through 8 high (binary 00000011111111):
digio.writeport(255)
digio.writeprotect
Attribute Write protect mask that disables bits from being changed with the digio.writebit and
digio.writeport functions.
Default 0
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage mask = digio.writeprotect -- Reads write protect mask.
digio.writeprotect = mask -- Writes write protect mask.
mask Set to the value that specifies the bit pattern for
write protect.
Remarks • Bits that are set to 1 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 00000000000111. This mask write protects lines 1, 2 and 3.
Details See Controlling digital I/O lines in Section 8.
Also see digio.writebit, digio.writeport.
Example Write protects lines 1, 2, 3 and 4:
digio.writeprotect = 15