MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Manual de usuario descargar pdf (Pagina 338)

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8 Serial Port I/O

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Getting Started with Serial I/O

To get you started with MATLAB’s serial port interface, this section provides

the following information:

•“Example: Getting Started” illustrates some basic serial port commands.

•“The Serial Port Session” describes the steps you use to perform any serial

port task from beginning to end.

•“Configuring and Returning Properties” describes how you display serial

port property names and property values, and how you assign values to

properties.

Example: Getting Started

If you have a device connected to the serial port COM1 and configured for a

baud rate of 4800, you can execute the following complete example.

s = serial('COM1');

set(s,'BaudRate',4800);

fopen(s);

fprintf(s,'*IDN?')

out = fscanf(s);

fclose(s)

delete(s)

clear s

The *IDN? command queries the device for identification information, which is

returned to

out. If your device does not support this command, or if it is

connected to a different serial port, you should modify the above example

accordingly.

Note *IDN? is one of the commands supported by the Standard Commands

for Programmable Instruments (SCPI) language, which is used by many

modern devices. Refer to your device documentation to see if it supports the

SCPI language.

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