quanser.hardware.hil.write_digital :: QUARC MATLAB Functions

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quanser.hardware.hil.write_digital

Writes to the specified digital channels.

Syntax

err = board.write_digital(channels, values)

Description

Writes to the specified digital channels immediately. It takes a vector of logical values where true (1) represents a high digital output, and false (0) represents a low digital output.

Warning Many cards allow the digital I/O lines to be programmed as inputs or outputs. The digital I/O lines are configured as inputs or outputs using the set_digital_directions function. All the channels which will be used as digital outputs must be configured as outputs using this function. Failure to configure the digital I/O may result in the write_digital function failing to write those outputs.

If no err output is provided then it throws an exception if an error occurs. In generated code it prints the error message. Use hil_get_error_message to get the message associated with an error code.

Parameters

board

The board instance returned by the quanser.hardware.hil.open function.

channels

A vector of channel numbers. Channel numbers are zero-based.

Select a board type from the list for board-specific details: .

values

A vector of logical values. A value of true (1) represents a high digital output and a value of false (0) represents a low digital output. There must be one element for each channel.

Outputs

err

A negative error code or zero on success.

Examples

% Writes 0 to digital channel 0, 1 to channel 3 and 0 to channel 5
board.write_digital([0 3 5], [0 1 0]);