MATLAB Serial Port I/O For Filtering

Hi guys,

I've designed an IIR filter in MATLAB. I used the filter values to write a
code for Atmega8. What i used for filter input is the output of a digital
sensor. The filter is working pretty good in MATLAB but the filter code
for Atmega8 gives a pure sinusoidal output (I couldn't do that if they
would ask me to do). I couldn't find the cause of the problem, so I want
to filter the output of the digital sensor in MATLAB to see whether my
code is correct or wrong. But now I need to get the serial port datas into
MATLAB. Do anyone knows how to do that? 

To make it clear: My MCU will send 16bit values and an "enter" after each
value to serial port with a baud rate of 57600. The MATLAB will take these
values and filter them simultaneously. What I need to know is how to take
serial port values into MATLAB. Hope to get an answer here.

Regards
Mursel

kerasus wrote:
> Hi guys,
> 
> I've designed an IIR filter in MATLAB. I used the filter values to write a
> code for Atmega8. What i used for filter input is the output of a digital
> sensor. The filter is working pretty good in MATLAB but the filter code
> for Atmega8 gives a pure sinusoidal output (I couldn't do that if they
> would ask me to do). I couldn't find the cause of the problem, so I want
> to filter the output of the digital sensor in MATLAB to see whether my
> code is correct or wrong. But now I need to get the serial port datas into
> MATLAB. Do anyone knows how to do that? 
> 
> To make it clear: My MCU will send 16bit values and an "enter" after each
> value to serial port with a baud rate of 57600. The MATLAB will take these
> values and filter them simultaneously. What I need to know is how to take
> serial port values into MATLAB. Hope to get an answer here.
> 
> Regards
> Mursel

Are these 16-bit values in the form of text?  How about capturing a 
string of them into a text file, then reading that file with MATLAB?

I've seen MATLAB do this directly, but I haven't done it myself -- I 
assume there are library routines to do it, but I'm not that much of a 
MATLAB guru.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

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