diff options
| author | Antti Seppälä <a.seppala@gmail.com> | 2015-03-31 14:48:07 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-01-30 13:48:46 -0200 |
| commit | 844a4f45f43b6d46b4dd87f61b3e2d2836c822b1 (patch) | |
| tree | 7ee7968e86fb060937cbb7f380679de510fd1d5d /drivers/media/rc/rc-core-priv.h | |
| parent | 3875233d0b42c6d194657735d1a4b6a8797bfaaa (diff) | |
[media] rc: rc-ir-raw: Add Manchester encoder (phase encoder) helper
Adding a simple Manchester encoder to rc-core.
Manchester coding is used by at least RC-5 and RC-6 protocols and their
variants.
Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: James Hogan <james@albanarts.com>
Signed-off-by: Sean Young <sean@mess.org>
Cc: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/rc/rc-core-priv.h')
| -rw-r--r-- | drivers/media/rc/rc-core-priv.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 18f932684e2e..b8d40e6e6ecf 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -154,6 +154,39 @@ static inline bool is_timing_event(struct ir_raw_event ev) #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") +/* functions for IR encoders */ + +static inline void init_ir_raw_event_duration(struct ir_raw_event *ev, + unsigned int pulse, + u32 duration) +{ + init_ir_raw_event(ev); + ev->duration = duration; + ev->pulse = pulse; +} + +/** + * struct ir_raw_timings_manchester - Manchester coding timings + * @leader: duration of leader pulse (if any) 0 if continuing + * existing signal (see @pulse_space_start) + * @pulse_space_start: 1 for starting with pulse (0 for starting with space) + * @clock: duration of each pulse/space in ns + * @invert: if set clock logic is inverted + * (0 = space + pulse, 1 = pulse + space) + * @trailer_space: duration of trailer space in ns + */ +struct ir_raw_timings_manchester { + unsigned int leader; + unsigned int pulse_space_start:1; + unsigned int clock; + unsigned int invert:1; + unsigned int trailer_space; +}; + +int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max, + const struct ir_raw_timings_manchester *timings, + unsigned int n, unsigned int data); + /* * Routines from rc-raw.c to be used internally and by decoders */ |