Cant open serial port properly ... I dont understand whats wrong ...

You may need to specify the translation mode as binary, as I'm not sure what the default translation mode under Linux is.

Mike Anton

after 2h of chat on IRC, someone said me that i forgot to enter nonOPOST mode, so I added line 70 with the proper line as described on http://www.easysw.mike/serial/serial.html

/* canonical raw input */ vars->serial->c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); vars->serial->c_lflag &= ~OPOST; vars->serial->c_cflag |= (CS8); /* use 8bit data */ // term_prop->c_cflag |= (CLOCAL | CREAD); tcsetattr(fd, TCSAFLUSH, vars->serial);

but I still had the same bug ... so that people offered that very horrible hack: I put

sprintf(stty,"stty -a < %s",vars->device); system(stty);

after tcsetattr

Q: why isnt the line with ~OPOST enough ???

OPOST needs to be applied to c_oflag (output modes), not c_lflag (local modes).

Cheers,

-Brian

You are right. Thank you all of you for your help

Actually, this is setting *non*canonical input (turning off ICANON). "Canonical" input means translating the terminal's idea of CR into Unix's idea (0x0A). By default, the serial port is configured to talk to a terminal, so flags like that are turned on.

See "man termios" for all the gory details. Yo ucan probably get what you want with "raw" mode: call tcgetattr(), cfmakeraw(), and then tcsetattr() to apply the modified attributes back onto the serial device. cfmakeraw() does almost the same thing you're doing in the code snippet you posted, except it modifies a few more flags.