Plot Graph Signal From Serial Port I/O

How can we plot the signal from serial port I/O (RS232)? Thank You

Answer 1

[Walter Roberson]

Which signal? RS232 can be done in as little as three wires (receive, transmit, and ground), but it is more common to use at least 5 (adding flow control), and on the standard IBM DB-9 serial port, 8 of the 9 pins have a well-defined use.

[Adi Mico]

plot the receive signal..

[Walter Roberson]

Do you want to plot the voltage level of the receive signal, or do you want the receive signal to be interpreted as a stream of binary bytes that you want to plot the numeric value of, or do you want the receive signal to be interpreted as a stream of characters that represent printable numbers that you then want to convert to numbers and plot those?

[Adi Mico]

Both of receive signal to be interpreted as a stream of binary bytes that I want to plot the numeric value of and the receive signal to be interpreted as a stream of characters that represent printable numbers that I want to convert to numbers and plot those.

The signal is send to the matlab become characters actually. But I want to convert them to numbers so I can plot them.

[Walter Roberson]

I suggest reading this documentation:

http://www.mathworks.com/help/techdoc/matlab_external/f62852.html

Answer 2

[Claudio Gambelli]

Yes it's possible to plot data received form serial port, i have developped this tool with customized protocol RTCPlot. Video and information are at the following link: http://www.gambelli.eu/body.php?page=product.htm

Bye Claudio