116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
#include "irda.h"
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <furi.h>
|
|
#include "../irda_i.h"
|
|
#include "../irda_protocol_defs_i.h"
|
|
|
|
typedef struct {
|
|
IrdaCommonDecoder* common_decoder;
|
|
bool toggle;
|
|
} IrdaRc6Decoder;
|
|
|
|
IrdaMessage* irda_decoder_rc6_check_ready(void* ctx) {
|
|
IrdaRc6Decoder* decoder_rc6 = ctx;
|
|
return irda_common_decoder_check_ready(decoder_rc6->common_decoder);
|
|
}
|
|
|
|
bool irda_decoder_rc6_interpret(IrdaCommonDecoder* decoder) {
|
|
furi_assert(decoder);
|
|
|
|
bool result = false;
|
|
uint32_t* data = (void*) &decoder->data[0];
|
|
// MSB first
|
|
uint8_t address = reverse((uint8_t) (*data >> 5));
|
|
uint8_t command = reverse((uint8_t) (*data >> 13));
|
|
bool start_bit = *data & 0x01;
|
|
bool toggle = !!(*data & 0x10);
|
|
uint8_t mode = (*data >> 1) & 0x7;
|
|
|
|
if ((start_bit == 1) && (mode == 0)) {
|
|
IrdaMessage* message = &decoder->message;
|
|
IrdaRc6Decoder *rc6_decoder = decoder->context;
|
|
bool *prev_toggle = &rc6_decoder->toggle;
|
|
if ((message->address == address)
|
|
&& (message->command == command)
|
|
&& (message->protocol == IrdaProtocolRC6)) {
|
|
message->repeat = (toggle == *prev_toggle);
|
|
} else {
|
|
message->repeat = false;
|
|
}
|
|
*prev_toggle = toggle;
|
|
message->command = command;
|
|
message->address = address;
|
|
message->protocol = IrdaProtocolRC6;
|
|
result = true;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* RC6 Uses manchester encoding, but it has twice longer
|
|
* 4-th bit (toggle bit) time quant, so we need to decode
|
|
* it separately and than pass decoding for other bits to
|
|
* common manchester decode function.
|
|
*/
|
|
IrdaStatus irda_decoder_rc6_decode_manchester(IrdaCommonDecoder* decoder, bool level, uint32_t timing) {
|
|
// 4th bit lasts 2x times more
|
|
IrdaStatus status = IrdaStatusError;
|
|
uint16_t bit = decoder->protocol->timings.bit1_mark;
|
|
uint16_t tolerance = decoder->protocol->timings.bit_tolerance;
|
|
|
|
bool single_timing = MATCH_TIMING(timing, bit, tolerance);
|
|
bool double_timing = MATCH_TIMING(timing, 2*bit, tolerance);
|
|
bool triple_timing = MATCH_TIMING(timing, 3*bit, tolerance);
|
|
|
|
if (decoder->databit_cnt == 4) {
|
|
furi_assert(decoder->switch_detect == true);
|
|
|
|
if (single_timing ^ triple_timing) {
|
|
++decoder->databit_cnt;
|
|
decoder->data[0] |= (single_timing ? !level : level) << 4;
|
|
status = IrdaStatusOk;
|
|
}
|
|
} else if (decoder->databit_cnt == 5) {
|
|
if (single_timing || triple_timing) {
|
|
if (triple_timing)
|
|
timing = bit;
|
|
decoder->switch_detect = false;
|
|
status = irda_common_decode_manchester(decoder, level, timing);
|
|
} else if (double_timing) {
|
|
status = IrdaStatusOk;
|
|
}
|
|
} else {
|
|
status = irda_common_decode_manchester(decoder, level, timing);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
void* irda_decoder_rc6_alloc(void) {
|
|
IrdaRc6Decoder* decoder = furi_alloc(sizeof(IrdaRc6Decoder));
|
|
decoder->toggle = false;
|
|
decoder->common_decoder = irda_common_decoder_alloc(&protocol_rc6);
|
|
decoder->common_decoder->context = decoder;
|
|
return decoder;
|
|
}
|
|
|
|
IrdaMessage* irda_decoder_rc6_decode(void* decoder, bool level, uint32_t duration) {
|
|
IrdaRc6Decoder* decoder_rc6 = decoder;
|
|
return irda_common_decode(decoder_rc6->common_decoder, level, duration);
|
|
}
|
|
|
|
void irda_decoder_rc6_free(void* decoder) {
|
|
IrdaRc6Decoder* decoder_rc6 = decoder;
|
|
irda_common_decoder_free(decoder_rc6->common_decoder);
|
|
free(decoder_rc6);
|
|
}
|
|
|
|
void irda_decoder_rc6_reset(void* decoder) {
|
|
IrdaRc6Decoder* decoder_rc6 = decoder;
|
|
irda_common_decoder_reset(decoder_rc6->common_decoder);
|
|
}
|
|
|