Talking to a usb device (serial terminal)

[blaine]

>
> It looks like the fastest speed supported by python termios on
> Linux is B460800 (uses a constant of 0x1004).  If you look in
> /usr/include/..., baud rates do go up to 921600 (which uses a
> constant of 0x1007).
>
> Try using the appropriate constant from /usr/include/... (for
> the target platform, of course).
>
> --
> Grant Edwards                   grante             Yow! Please come home with
>                                   at               me ... I have Tylenol!!
>                                visi.com
Thank you for your response.  I can't seem to find what you're
referencing in /usr/include.  I found termios.h - but it does not
define any constants (I can include it if you wish).  I did find
termios.c in the Python module file, which only defines constants up
to :
[...]
        {"B2400", B2400},
        {"B4800", B4800},
        {"B9600", B9600},
        {"B19200", B19200},
        {"B38400", B38400},
#ifdef B57600
        {"B57600", B57600},
#endif
#ifdef B115200
        {"B115200", B115200},
#endif
#ifdef B230400
        {"B230400", B230400},

I could recompile python, I imagine, with additional constants but
this wouldn't be ideal - although it is a possible solution.

the only reference to a baud rate in termios.h is here:
/* Return the output baud rate stored in *TERMIOS_P.  */
extern speed_t cfgetospeed (__const struct termios *__termios_p)
__THROW;

/* Return the input baud rate stored in *TERMIOS_P.  */
extern speed_t cfgetispeed (__const struct termios *__termios_p)
__THROW;

/* Set the output baud rate stored in *TERMIOS_P to SPEED.  */
extern int cfsetospeed (struct termios *__termios_p, speed_t __speed)
__THROW;

/* Set the input baud rate stored in *TERMIOS_P to SPEED.  */
extern int cfsetispeed (struct termios *__termios_p, speed_t __speed)
__THROW;

the termios.h and const.h in the linux/ folder aren't much help.  I'm
sure I'm just looking at the wrong file.

Thank you again for all your help!
Blaine