Prev: MathWorks::System::SimpleException
Next: PS and EPS figures are pixelated
From: Kev on 9 Apr 2010 17:49
I am trying to do a serial interface on a medical pump via Matlab using examples of serial communication that I have found on the internet, but what seems like a really simple task just isn't working for me. Here are the codes that I've been trying with:

!mode com1:9600,n,8,1
s = serial('COM1');

fopen(s);
fprintf(s,'*IDN?');
get(s,{'InputBufferSize','BytesAvailable'});


This should return me with some device information but on the command window, it only shows:


Serial Port Object : Serial-PORT

Communication Settings
Port: PORT
BaudRate: 9600
Terminator: 'LF'

Communication State
Status: closed
RecordStatus: off

Read/Write State
TransferStatus: idle
BytesAvailable: 0
ValuesReceived: 0
ValuesSent: 0


so here it is telling me that the communication is closed, yet in the code that I used, this status should be open shouldn't it?

If anyone can point me in the right direction it'll be much appreciated.

Thanks in advance
From: Kev on 11 Apr 2010 21:26
anyone?
From: Walter Roberson on 12 Apr 2010 17:36
Kev wrote:
> I am trying to do a serial interface on a medical pump via Matlab using examples of serial communication that I have found on the internet, but what seems like a really simple task just isn't working for me. Here are the codes that I've been trying with:
>
> !mode com1:9600,n,8,1
> s = serial('COM1');
>
> fopen(s);
> fprintf(s,'*IDN?');
> get(s,{'InputBufferSize','BytesAvailable'});
>
>
> This should return me with some device information but on the command window, it only shows:
>
>
> Serial Port Object : Serial-PORT
>
> Communication Settings
> Port: PORT
> BaudRate: 9600
> Terminator: 'LF'
>
> Communication State
> Status: closed

[fid, status] = fopen(s);
disp(status);


By the way, you should cross-check that terminator 'LF' (linefeed) is correct
for the equipment. 'CR' is pretty common, and CR followed by LF is the
standard for a bunch of communications systems. The terminator choice would
not affect the ability to open the port, though.
 | 
Pages: 1
Prev: MathWorks::System::SimpleException
Next: PS and EPS figures are pixelated