85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
#include "irda.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <furi.h>
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#include "../irda_i.h"
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#include "../irda_protocol_defs_i.h"
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typedef struct {
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IrdaCommonDecoder* common_decoder;
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bool toggle;
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} IrdaRc5Decoder;
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IrdaMessage* irda_decoder_rc5_check_ready(void* ctx) {
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IrdaRc5Decoder* decoder = ctx;
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return irda_common_decoder_check_ready(decoder->common_decoder);
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}
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bool irda_decoder_rc5_interpret(IrdaCommonDecoder* decoder) {
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furi_assert(decoder);
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bool result = false;
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uint32_t* data = (void*) &decoder->data[0];
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/* Manchester (inverse):
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* 0->1 : 1
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* 1->0 : 0
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*/
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decoder->data[0] = ~decoder->data[0];
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decoder->data[1] = ~decoder->data[1];
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// MSB first
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uint8_t address = reverse((uint8_t) decoder->data[0]) & 0x1F;
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uint8_t command = (reverse((uint8_t) decoder->data[1]) >> 2) & 0x3F;
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bool start_bit1 = *data & 0x01;
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bool start_bit2 = *data & 0x02;
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bool toggle = !!(*data & 0x04);
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if (start_bit1 == 1) {
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IrdaProtocol protocol = start_bit2 ? IrdaProtocolRC5 : IrdaProtocolRC5X;
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IrdaMessage* message = &decoder->message;
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IrdaRc5Decoder *rc5_decoder = decoder->context;
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bool *prev_toggle = &rc5_decoder->toggle;
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if ((message->address == address)
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&& (message->command == command)
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&& (message->protocol == protocol)) {
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message->repeat = (toggle == *prev_toggle);
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} else {
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message->repeat = false;
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}
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*prev_toggle = toggle;
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message->command = command;
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message->address = address;
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message->protocol = protocol;
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result = true;
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}
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return result;
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}
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void* irda_decoder_rc5_alloc(void) {
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IrdaRc5Decoder* decoder = furi_alloc(sizeof(IrdaRc5Decoder));
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decoder->toggle = false;
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decoder->common_decoder = irda_common_decoder_alloc(&protocol_rc5);
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decoder->common_decoder->context = decoder;
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return decoder;
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}
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IrdaMessage* irda_decoder_rc5_decode(void* decoder, bool level, uint32_t duration) {
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IrdaRc5Decoder* decoder_rc5 = decoder;
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return irda_common_decode(decoder_rc5->common_decoder, level, duration);
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}
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void irda_decoder_rc5_free(void* decoder) {
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IrdaRc5Decoder* decoder_rc5 = decoder;
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irda_common_decoder_free(decoder_rc5->common_decoder);
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free(decoder_rc5);
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}
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void irda_decoder_rc5_reset(void* decoder) {
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IrdaRc5Decoder* decoder_rc5 = decoder;
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irda_common_decoder_reset(decoder_rc5->common_decoder);
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}
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