flipperzero-firmware/lib/infrared/encoder_decoder/rc5/infrared_decoder_rc5.c

80 lines
2.5 KiB
C
Raw Permalink Normal View History

#include "infrared_protocol_rc5_i.h"
#include <stdlib.h>
#include <core/check.h>
typedef struct {
InfraredCommonDecoder* common_decoder;
bool toggle;
} InfraredRc5Decoder;
InfraredMessage* infrared_decoder_rc5_check_ready(void* ctx) {
InfraredRc5Decoder* decoder = ctx;
return infrared_common_decoder_check_ready(decoder->common_decoder);
}
bool infrared_decoder_rc5_interpret(InfraredCommonDecoder* decoder) {
furi_assert(decoder);
bool result = false;
uint32_t* data = (void*)&decoder->data[0];
/* Manchester (inverse):
* 0->1 : 1
* 1->0 : 0
*/
decoder->data[0] = ~decoder->data[0];
decoder->data[1] = ~decoder->data[1];
// MSB first
uint8_t address = reverse((uint8_t)decoder->data[0]) & 0x1F;
uint8_t command = (reverse((uint8_t)decoder->data[1]) >> 2) & 0x3F;
bool start_bit1 = *data & 0x01;
bool start_bit2 = *data & 0x02;
bool toggle = !!(*data & 0x04);
if(start_bit1 == 1) {
InfraredProtocol protocol = start_bit2 ? InfraredProtocolRC5 : InfraredProtocolRC5X;
InfraredMessage* message = &decoder->message;
InfraredRc5Decoder* rc5_decoder = decoder->context;
bool* prev_toggle = &rc5_decoder->toggle;
if((message->address == address) && (message->command == command) &&
(message->protocol == protocol)) {
message->repeat = (toggle == *prev_toggle);
} else {
message->repeat = false;
}
*prev_toggle = toggle;
message->command = command;
message->address = address;
message->protocol = protocol;
result = true;
}
return result;
}
void* infrared_decoder_rc5_alloc(void) {
InfraredRc5Decoder* decoder = malloc(sizeof(InfraredRc5Decoder));
decoder->toggle = false;
decoder->common_decoder = infrared_common_decoder_alloc(&infrared_protocol_rc5);
decoder->common_decoder->context = decoder;
return decoder;
}
InfraredMessage* infrared_decoder_rc5_decode(void* decoder, bool level, uint32_t duration) {
InfraredRc5Decoder* decoder_rc5 = decoder;
return infrared_common_decode(decoder_rc5->common_decoder, level, duration);
}
void infrared_decoder_rc5_free(void* decoder) {
InfraredRc5Decoder* decoder_rc5 = decoder;
infrared_common_decoder_free(decoder_rc5->common_decoder);
free(decoder_rc5);
}
void infrared_decoder_rc5_reset(void* decoder) {
InfraredRc5Decoder* decoder_rc5 = decoder;
infrared_common_decoder_reset(decoder_rc5->common_decoder);
}