93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
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#include "common/irda_common_i.h"
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#include "irda.h"
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#include "irda_protocol_defs_i.h"
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#include <stdbool.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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IrdaMessage* irda_decoder_sirc_check_ready(void* ctx) {
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IrdaMessage* message = NULL;
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IrdaCommonDecoder* decoder = ctx;
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if (irda_decoder_sirc_interpret(decoder)) {
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message = &decoder->message;
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decoder->timings_cnt = 0;
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decoder->databit_cnt = 0;
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}
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return message;
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}
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bool irda_decoder_sirc_interpret(IrdaCommonDecoder* decoder) {
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furi_assert(decoder);
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uint32_t* data = (void*) &decoder->data[0];
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uint16_t address = 0;
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uint8_t command = 0;
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IrdaProtocol protocol = IrdaProtocolUnknown;
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if (decoder->databit_cnt == 12) {
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address = (*data >> 7) & 0x1F;
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command = *data & 0x7F;
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protocol = IrdaProtocolSIRC;
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} else if (decoder->databit_cnt == 15) {
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address = (*data >> 7) & 0xFF;
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command = *data & 0x7F;
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protocol = IrdaProtocolSIRC15;
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} else if (decoder->databit_cnt == 20) {
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address = (*data >> 7) & 0x1FFF;
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command = *data & 0x7F;
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protocol = IrdaProtocolSIRC20;
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} else {
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return false;
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}
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decoder->message.protocol = protocol;
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decoder->message.address = address;
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decoder->message.command = command;
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/* SIRC doesn't specify repeat detection */
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decoder->message.repeat = false;
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return true;
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}
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void* irda_decoder_sirc_alloc(void) {
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return irda_common_decoder_alloc(&protocol_sirc);
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}
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IrdaMessage* irda_decoder_sirc_decode(void* context, bool level, uint32_t duration) {
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IrdaCommonDecoder* decoder = context;
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IrdaMessage* message = NULL;
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if ((decoder->databit_cnt == 12) || (decoder->databit_cnt == 15)) {
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if (!level && (duration >= IRDA_SIRC_MIN_SILENCE)) {
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if (irda_decoder_sirc_interpret(decoder)) {
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message = &decoder->message;
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decoder->timings_cnt = 0;
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decoder->databit_cnt = 0;
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}
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}
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}
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if (!message) {
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message = irda_common_decode(decoder, level, duration);
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if (message) { /* 20 bit */
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decoder->timings_cnt = 0;
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decoder->databit_cnt = 0;
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}
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}
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return message;
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}
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void irda_decoder_sirc_free(void* decoder) {
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irda_common_decoder_free(decoder);
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}
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void irda_decoder_sirc_reset(void* decoder) {
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irda_common_decoder_reset(decoder);
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}
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