12-24 Instrument Control Library Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Section 12 topics
digio.writeport
Function Writes to all digital I/O lines.
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.
Details See “Controlling digital I/O lines” in Section 10.
Also see digio.readbit, digio.readport, 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.
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 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 00000000000111. This mask
write protects lines 1, 2 and 3.
Details See “Controlling digital I/O lines” in Section 10.
Also see digio.writebit, digio.writeport
Example
Write protects lines 1, 2, 3 and 4:
digio.writeprotect = 15
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