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12-18 Return to Section Topics 2600S-901-01 Rev. C / January 2008

Section 12: Instrument Control Library Series 2600 System SourceMeter® Instruments Reference Manual

Remarks A returned value of 0 indicates that the line is low. A returned value of 1 indicates that the

line is high.

Details See “Digital I/O port” in Section 10.

Also see digio.readport, digio.writebit, digio.writeport

Example -- Assume line 4 is set high, and it is then read:

data = digio.readbit(4)

print(data)

Output: 1.000000e+00

digio.readport

Function Reads the digital I/O port.

Usage data = digio.readport()

Remarks The binary equivalent of the returned value indicates the input pattern on the I/O port. The

least significant bit of the binary number corresponds to line 1 and bit 14 corresponds to line

14. For example, a returned value of 170 has a binary equivalent of 00000010101010.

Lines 2, 4, 6 and 8 are high (1), and the other 10 lines are low (0).

Details See “Digital I/O port” in Section 10.

Also see digio.readbit, digio.writebit, digio.writeport

Example -- Assume lines 2, 4, 6 and 8 are set high, and the I/O port is then read:

data = digio.readport()

print(data)

Output: 1.700000e+02 (binary 10101010)

Keithley 2635 Reference Manual

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