User's Manual

3.4.2. I/O

Brief Description

Name

Arguments (in C Syntax)

Full Description

Read the inputs of a

chip, the EventFlags of

its two encoders, and

the Voltage Failure.

ReadInputs

(long CardHandle,

short* Inputs,

short*EncoderEventFlags)

Reads 5 or 6 chip's logical inputs, the two flags of its

EncoderEvents, and, in case of Chip #1, the Voltage Failure.

Inputs:

For Chip #1: Bit #n corresponds to logical input #n+1 (n = 0,...,4).

Bit #5 corresponds to Voltage Failure (1 means that

Voltage Failure = true).

For Chip #2: Bit #n corresponds to logical input #n+6. (n = 0,...,5).

EncoderEventFlags: Bit #0 corresponds to Encoder1 (A or C).

Bit #1 corresponds to Encoder2 (B or D).

Notes:

1. Chip #1 has 5 logical inputs (marked 1–5).

Chip #2 has 6 logical inputs (marked 6–11).

2. When an encoder event occurs, its software signal is held until

ReadInputs is called. Afterwards, the software signal is cleared,

unless the signal still lasts. This mechanism ensures that

ReadInputs will hold the last encoder event (in

EncoderEventFlags) even though the event is already over.

Write to chip's outputs.

WriteOutputs

(long CardHandle,

short Outputs)

Meaningful only when the active chip is Chip1, in which case its

three general outputs (marked 1,2,3) are written.

Outputs: Bit #n corresponds to general output #n+1 (n=0,1,2).

Notes:

1. Due to hardware limitations, the current status of Outputs should

be kept in order to be passed as argument in the functions

ResetPositionCounter and RequestPositionCounter (named there

OutputsMirror, refer to section 3.5.5, functions #25–26).

2. Chip2 has no general outputs.

Note: The description of the common arguments is in section 3.6