On Sun, Dec 06, 2009 at 12:58:00PM +0100, Christoph Bartelmus wrote: > Hi Dmitry, > > on 04 Dec 09 at 15:15, Dmitry Torokhov wrote: > [...] > >>>>>> http://lirc.sourceforge.net/remotes/lg/6711A20015N > >>>>>> > >>>>>> This is an air-conditioner remote. > >>>>>> The entries that you see in this config file are not really separate > >>>>>> buttons. Instead the remote just sends the current settings for e.g. > >>>>>> temperature encoded in the protocol when you press some up/down key. > >>>>>> You really don't want to map all possible temperature settings to KEY_* > >>>>>> events. For such cases it would be nice to have access at the raw scan > >>>>>> codes from user space to do interpretation of the data. > >>>>>> The default would still be to pass the data to the input layer, but it > >>>>>> won't hurt to have the possibility to access the raw data somehow. > >>>> > >>>>> Interesting. IMHO, the better would be to add an evdev ioctl to return > >>>>> the scancode for such cases, instead of returning the keycode. > >>>> > >>>> That means you would have to set up a pseudo keymap, so that you can get > >>>> the key event which you could than react on with a ioctl. Or are you > >>>> generating KEY_UNKNOWN for every scancode that is not mapped? > >>>> What if different scan codes are mapped to the same key event? How do you > >>>> retrieve the scan code for the key event? > >>>> I don't think it can work this way. > >>>> > >> > >>> EV_MSC/MSC_SCAN. > >> > >> How would I get the 64 bit scan codes that the iMON devices generate? > >> How would I know that the scan code is 64 bit? > >> input_event.value is __s32. > >> > > > I suppose we could add MSC_SCAN_END event so that we can transmit > > "scancodes" of arbitrary length. You'd get several MSC_SCAN followed by > > MSC_SCAN_END marker. If you don't get MSC_SCAN_END assume the code is 32 > > bit. > > And I set a timeout to know that no MSC_SCAN_END will arrive? This is > broken design IMHO. > EV_SYN signals the end of state transmission. > Furthermore lircd needs to know the length of the scan code in bits, not > as a multiple of 32. I really do not think that LIRCD is the type of application that should be using evdev interface, but rather other way around. > > > FWIW there is MSC_RAW as well. > > It took me some time to convice people that this is not the right way to > handle raw timing data. > > Christoph -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
