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Nathan Fain nat at fains.comfyi, using the /dev/cu.** variant solved my problem of osmocon being unable to write CMD1 to the port. At least, it worked with an FTDI cable I built. I imagine it will solve the issue with the prolific cable as well (will try later). On 29/03/2010 03:39, willem wrote: > i managed to get hello_world working on my c121, connected through a > pl2303 usb/serial cable to my macbookpro. > > but found that the connection is extremely noisy. > often the movement of me putting down the phone on the table is enough > to break the upload. > is that a common problem with these headphone/serial cable plugs? > > > for the serial device i can use /dev/cu.PL2303-0000201A > or /dev/tty.PL2303-0000201A > > but when using the '/dev/tty...' variant, i have to add this to osmocon.c > > diff --git a/src/host/osmocon/osmocon.c b/src/host/osmocon/osmocon.c > index f934dd7..b361eb1 100644 > --- a/src/host/osmocon/osmocon.c > +++ b/src/host/osmocon/osmocon.c > @@ -128,6 +128,9 @@ static int serial_init(const char *serial_dev) > /* hardware flow control off */ > options.c_cflag &= ~CRTSCTS; > > + /* ignore modem status lines */ > + options.c_cflag |= CLOCAL; > + > /* software flow control off */ > options.c_iflag &= ~(IXON | IXOFF | IXANY); > > ============================= > > willem > > > >