Hi Mark, >>However, the way the application is at the moment I need to poll the >>input-ports every so often in order to detect a pushbutton-activation. >>Hence, I would like to register an interrupt-handler (of some sort) that >>informs me when these events occur. Is that somehow possible? > I don't know this hardware so I don't know if you can bring the GPIO into an > actual IRQ line. Well, according to the manual GPIO0_17-23 (IRQ 0-6) is connected to interrupt 25-31, but I have no clue how to utilise that...
> But if you can't, a pretty efficient way to poll the GPIO is to hook into > the heartbeat timer (100Hz, 10ms). === SNIP === > I've only done this from within a device driver, btw - the app opens > /dev/mydevice and gets a character whenever the gpio (in my case a keypad) > changes. So you've created your own device-driver on top of the gpio-dev.-driver? And what kind of device is this? Does the driver buffer keypad inputs even if the device is not open? Can you please post a source example describing this in further details? Regards, Martin ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
