Jan,
I want to get some signals from a electronic circuit at my serial-
port com0. I don't know how to attach the pin's from the serial port
with the gpioctl tool. I think it my hardware is not supported, but
I don't know exactly. In my dmesg there is nothing like this:
"gpio0 at gscpcib0: 64 pins"
What could I do to get the signals from my circuit or to get support
with gpio?
I am sorry, but doing this with the gpio framework is not possible.
To make this
happen, it would require a small driver that wins over the standard
serial port
driver during system auto configuration and that provides the modem
control lines
as GPIO. While I think such a driver would be fairly easy to write,
it does not yet
exist to my best knowledge.
You can, however, open the serial port's tty device and query the
modem control
signals.
- Marc Balmer
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