Hi I'm trying to set a MIDI connection through serial port 4
echo something > /dev/ttyO4
works if I select one of the baud rates defined in termios.h (say 38400)
but doesn't work for 31250 (the MIDI baud rate).
I have flashed to 4.1 (uname -r == 4.1.2-ti-r4) and can get a 500k Baud
serial port from another UART. With the idea that setting a divisor would
work out to the desired BAUD if I could set a divisor of 16. I have another
UART that needs to run at 1 MBaud.
Is there someway of putting in a custom baud divisor in c code ideally?
This is where I am at:
void initializeBBB() {
FILE *uartFileManager;
//UART config using termios
struct termios midiTermios, picTermios, tempTermios;
midiDevice = open( "/dev/ttyO4", O_RDWR | O_NOCTTY );
if ( midiDevice < 0 ) {
printf("Error: MIDI connection failed to open");
}
tcgetattr( midiDevice, &tempTermios );
bzero( &midiTermios, sizeof( midiTermios ) );
midiTermios.c_cflag = B500000 | CS8 | CLOCAL | CREAD;
midiTermios.c_iflag = IGNPAR | ICRNL;
midiTermios.c_oflag = 0;
midiTermios.c_lflag = 0;
midiTermios.c_cc[VTIME] = 0;
midiTermios.c_cc[VMIN] = 1;
tcflush( midiDevice, TCIFLUSH );
tcsetattr( midiDevice, TCSANOW, &midiTermios );
}
which will initialize ttyO4 to 500000 Baud. Placing in:
cfsetispeed(&midiTermios, 31250);
cfsetospeed(&midiTermios, 31250);
cfmakeraw(&midiTermios);
before tcsetattr did not accomplish setting.
midiTermios.c_ispeed = 31250;
midiTermios.c_ospeed = 31250;
also didn't work. Are there ioctl commands available on the BBB? Any help
that doesn't make me use a MIDI --> USB cable and connect that way would be
appreciated. I would really like to not have to recompile the kernel.
Thanks,
j
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
