MATLAB Central Newsreader - Reading Serial data from RS232 Continuously

Reading Serial data from RS232 Continuously

SmartEngineer — Wed, 26 Mar 2008 17:04:01 -0400

Hello,
Can anyone please suggest me how to acquire the data
(ASCI format) from a RS 232 port continuously..i.e The
port will be opened and it should keep reading till I say
stop(may be using a GUI).

Thanks in advance for your help.

SME.

Reading Serial data from RS232 Continuously

SmartEngineer — Thu, 27 Mar 2008 12:36:01 -0400

Any help please.

"SmartEngineer " <smartengineer@mathworks.com> wrote in
message <fsdvm1$q8l$1@fred.mathworks.com>...
> Hello,
> Can anyone please suggest me how to acquire the
data
> (ASCI format) from a RS 232 port continuously..i.e The
> port will be opened and it should keep reading till I
say
> stop(may be using a GUI).
>
> Thanks in advance for your help.
>
> SME.

Re: Reading Serial data from RS232 Continuously

Mark Jones — Thu, 27 Mar 2008 13:01:22 -0400

> "SmartEngineer " <smartengineer@mathworks.com> wrote in
> message <fsdvm1$q8l$1@fred.mathworks.com>...
>> Hello,
>> Can anyone please suggest me how to acquire the
> data
>> (ASCI format) from a RS 232 port continuously..i.e The
>> port will be opened and it should keep reading till I
> say
>> stop(may be using a GUI).
>>
>> Thanks in advance for your help.
>>
>> SME.
>

You can do this using a BytesAvailableFcn callback. Please see:

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_external/bytesavailablefcn.html

Mark

Re: Reading Serial data from RS232 Continuously

SmartEngineer — Sat, 29 Mar 2008 06:51:01 -0400

Thanks Mark

Re: Reading Serial data from RS232 Continuously

Jeremy — Fri, 11 Apr 2008 03:48:01 -0400

I was trying to do a similar operation but I wanted to read
the binary values in and convert them to integers and then
manipulate as necessary. I am using the rs232 to transmit in
2 bytes at a time. I want to read them in continuously. But
I am really lost as to where to start on this. Any help?