On Tue, Aug 7, 2012 at 4:37 AM, Andrius Sutas <andrius.su...@gmail.com> wrote:
> Hey,
>
> please see alpha release of Serial I/O package.
>
> I am looking for any comments on code style, usability, naming etc. Also, it
> would be great if people could reply on which platforms they successfully
> (and not, which is more important) tested it. Sorry but Windows is not yet
> supported.
>
> Currently open flags are hardcoded to: O_RDWR | O_NOCTTY | O_SYNC, as I yet
> to decide what is the best way to maintain cross-platformability and ease of
> use (e.g. using string for parity setting and then doing switch according to
> platform being used instead of making the same flags from different
> platforms global to Octave), comments are welcome.
>
> Also, a simple example to get started (for testing adapter's RX and TX lines
> are connected together):
>
> s0 = serial() # Opens default serial port ttyUSB0 in default configuration
> of 115200, 8-N-1
>
> s1 = serial("/dev/ttyUSB1", 115200) # Opens serial port ttyUSB1 with
> baudrate of 115200 (config defaults to 8-N-1)
> srl_flush(s1); # Flush input and output buffers
> srl_write(s1, "Hello world!") # Blocking write call, currently only accepts
> strings
> data = srl_read(s1, 11) # Blocking read call, returns uint8 array of
> exactly 11 bytes read (data = [72 101 108 108 111 32 119 111 114
> 108 100])
>
> char(data) # Converts uint8 array to string, (ans = "Hello world", note: no
> exclamation mark)
>
> srl_baudrate(s1, 9600) # Change baudrate
> srl_bytesize(s1, 5) # Change byte size (config becomes 5-N-1)
> srl_parity(s1, "E") # Changes parity checking (config becomes 5-E-1),
> possible values [E]ven, [O]dd, [N]one.
> srl_stopbits(s1, 2) # Changes stop bits (config becomes 5-E-2), possible
> values 1, 2.
>
> s2 = serial("/dev/ttyS0", 9600, 6, "odd", 2) # Opens serial port ttyS0 in
> 9600, 6-O-2 configuration
>
> srl_close(s0) # Closes and releases file descriptor
>
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Hi Andrius,
Thanks for the first release!
When installing on Ubuntu 10.10, gcc version 4.4.5 (Ubuntu/Linaro
4.4.4-14ubuntu5.1) I get the following deprecation warning
srl_read.cc: In function ‘octave_value_list Fsrl_read(const
octave_value_list&, int)’:
srl_read.cc:92: warning: ‘void Array<T>::resize(octave_idx_type) [with
T = octave_int<unsigned char>]’ is deprecated (declared at
/usr/local/include/octave-3.6.2/octave/../octave/Array.h:459)
but I guess this is something in core.
I have no usb-to-serial at hand (I am away from my lab) but I tested
using virtual loopback using pseudo terminals.
(for the ones who wan to try: In linux install "socat" and then run
"socat -d -d PTY: PTY:")
The following lines work as expected
pkg load serial
s1 = serial("/dev/ptmx", 115200);
srl_flush(s1);
srl_write(s1, "Hello world!")
data = srl_read(s1,12);
char(data)
srl_close(s1)
However when run again I get
s1 = serial("/dev/ptmx", 115200);
srl_flush(s1);
srl_write(s1, "Hello world!");
data = srl_read(s1,12);
error: srl_read: Invalid resizing operation or ambiguous assignment to
an out-of-bounds array element
This may be due to the virtual loopback. I will try again with
hardware later, but it would be nice to see why there is a problem (if
there is!) with virtual loopbacks.
--
M. Sc. Juan Pablo Carbajal
-----
PhD Student
University of Zürich
http://ailab.ifi.uzh.ch/carbajal/
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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