Em 19-09-2011 08:12, Lawrence Rust escreveu: > The current decoder for the RC6 IR protocol supports mode 0 (16 bit) and > mode 6A. In mode 6A the decoder supports either 32-bit data (for > Microsoft's MCE RC) or 24 bit. > > I would like to support a Sky/Sky+ standard RC which transmits RC6-6-20 > i.e. 20 bit data. The transmitted frame format is identical to the 24 > bit form so I'm curious as to what remotes transmit 24 bit data or was > this an error and it should be 20? > > RC6-6-20 is explained here: > http://www.guiott.com/wrc/RC6-6.html > > If 24-bit mode is in use, is there a way to select between 20 and 24 bit > operation? You'll need to figure out a way to detect between them. It is probably not hard to detect, and add support for both at the decider. Maybe you can find something useful here: http://www.sbprojects.com/knowledge/ir/rc6.php > > I made the following simple mod to ir-rc6-decoder.c and my Sky/Sky+ RCs > decode correctly (with a custom keytable): > > --- a/drivers/media/rc/ir-rc6-decoder.c 2011-05-19 06:06:34.000000000 +0200 > +++ b/drivers/media/rc/ir-rc6-decoder.c 2011-09-19 13:02:35.000000000 +0200 > @@ -17,14 +17,14 @@ > /* > * This decoder currently supports: > * RC6-0-16 (standard toggle bit in header) > - * RC6-6A-24 (no toggle bit) > + * RC6-6A-20 (no toggle bit) > * RC6-6A-32 (MCE version with toggle bit in body) > */ > > #define RC6_UNIT 444444 /* us */ > #define RC6_HEADER_NBITS 4 /* not including toggle bit */ > #define RC6_0_NBITS 16 > -#define RC6_6A_SMALL_NBITS 24 > +#define RC6_6A_SMALL_NBITS 20 > #define RC6_6A_LARGE_NBITS 32 > #define RC6_PREFIX_PULSE (6 * RC6_UNIT) > #define RC6_PREFIX_SPACE (2 * RC6_UNIT) > @@ -231,7 +231,7 @@ again: > scancode = data->body & ~RC6_6A_MCE_TOGGLE_MASK; > } else { > toggle = 0; > - scancode = data->body & 0xffffff; > + scancode = data->body; > } > > IR_dprintk(1, "RC6(6A) scancode 0x%08x (toggle: %u)\n", > > -- 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
