[FL-1696, FL-1685] IRDA: Add RC5, decoder refactoring (#663)
* [FL-1696] IRDA: Split decoders and protocols * IRDA: Restruct directories. * IRDA: fix long timings * [FL-1685] IRDA: Add RC5 Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
273
lib/irda/encoder_decoder/common/irda_common_decoder.c
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273
lib/irda/encoder_decoder/common/irda_common_decoder.c
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@@ -0,0 +1,273 @@
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#include "furi/check.h"
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#include "irda.h"
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#include "irda_common_i.h"
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#include <stdbool.h>
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#include <furi.h>
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#include "irda_i.h"
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static void irda_common_decoder_reset_state(IrdaCommonDecoder* common_decoder);
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static bool irda_check_preamble(IrdaCommonDecoder* decoder) {
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furi_assert(decoder);
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bool result = false;
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bool start_level = (decoder->level + decoder->timings_cnt + 1) % 2;
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// align to start at Mark timing
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if (!start_level) {
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if (decoder->timings_cnt > 0) {
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--decoder->timings_cnt;
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shift_left_array(decoder->timings, decoder->timings_cnt, 1);
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}
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}
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if (decoder->protocol->timings.preamble_mark == 0) {
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return true;
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}
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while ((!result) && (decoder->timings_cnt >= 2)) {
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float preamble_tolerance = decoder->protocol->timings.preamble_tolerance;
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uint16_t preamble_mark = decoder->protocol->timings.preamble_mark;
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uint16_t preamble_space = decoder->protocol->timings.preamble_space;
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if ((MATCH_PREAMBLE_TIMING(decoder->timings[0], preamble_mark, preamble_tolerance))
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&& (MATCH_PREAMBLE_TIMING(decoder->timings[1], preamble_space, preamble_tolerance))) {
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result = true;
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}
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decoder->timings_cnt -= 2;
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shift_left_array(decoder->timings, decoder->timings_cnt, 2);
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}
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return result;
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}
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/* Pulse Distance-Width Modulation */
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IrdaStatus irda_common_decode_pdwm(IrdaCommonDecoder* decoder) {
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furi_assert(decoder);
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uint32_t* timings = decoder->timings;
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uint16_t index = 0;
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uint8_t shift = 0;
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IrdaStatus status = IrdaStatusError;
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uint32_t bit_tolerance = decoder->protocol->timings.bit_tolerance;
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uint16_t bit1_mark = decoder->protocol->timings.bit1_mark;
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uint16_t bit1_space = decoder->protocol->timings.bit1_space;
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uint16_t bit0_mark = decoder->protocol->timings.bit0_mark;
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uint16_t bit0_space = decoder->protocol->timings.bit0_space;
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while (1) {
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// Stop bit
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if ((decoder->databit_cnt == decoder->protocol->databit_len) && (decoder->timings_cnt == 1)) {
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if (MATCH_BIT_TIMING(timings[0], bit1_mark, bit_tolerance)) {
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decoder->timings_cnt = 0;
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status = IrdaStatusReady;
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} else {
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status = IrdaStatusError;
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}
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break;
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}
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if (decoder->timings_cnt >= 2) {
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index = decoder->databit_cnt / 8;
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shift = decoder->databit_cnt % 8; // LSB first
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if (!shift)
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decoder->data[index] = 0;
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if (MATCH_BIT_TIMING(timings[0], bit1_mark, bit_tolerance)
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&& MATCH_BIT_TIMING(timings[1], bit1_space, bit_tolerance)) {
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decoder->data[index] |= (0x1 << shift); // add 1
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} else if (MATCH_BIT_TIMING(timings[0], bit0_mark, bit_tolerance)
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&& MATCH_BIT_TIMING(timings[1], bit0_space, bit_tolerance)) {
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(void) decoder->data[index]; // add 0
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} else {
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status = IrdaStatusError;
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break;
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}
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++decoder->databit_cnt;
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decoder->timings_cnt -= 2;
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shift_left_array(decoder->timings, decoder->timings_cnt, 2);
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} else {
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status = IrdaStatusOk;
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break;
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}
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}
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return status;
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}
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/* level switch detection goes in middle of time-quant */
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IrdaStatus irda_common_decode_manchester(IrdaCommonDecoder* decoder) {
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furi_assert(decoder);
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IrdaStatus status = IrdaStatusOk;
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uint16_t bit = decoder->protocol->timings.bit1_mark;
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uint16_t tolerance = decoder->protocol->timings.bit_tolerance;
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while (decoder->timings_cnt) {
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uint32_t timing = decoder->timings[0];
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bool* switch_detect = &decoder->switch_detect;
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furi_assert((*switch_detect == true) || (*switch_detect == false));
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bool single_timing = MATCH_BIT_TIMING(timing, bit, tolerance);
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bool double_timing = MATCH_BIT_TIMING(timing, 2*bit, tolerance);
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if(!single_timing && !double_timing) {
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status = IrdaStatusError;
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break;
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}
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if ((decoder->protocol->manchester_start_from_space) && (decoder->databit_cnt == 0)) {
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*switch_detect = 1; /* fake as we were previously in the middle of time-quant */
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decoder->data[0] = 0; /* first captured timing should be Mark */
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++decoder->databit_cnt;
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}
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if (*switch_detect == 0) {
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if (double_timing) {
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status = IrdaStatusError;
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break;
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}
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/* only single timing - level switch required in the middle of time-quant */
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*switch_detect = 1;
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} else {
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/* double timing means we in the middle of time-quant again */
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if (single_timing)
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*switch_detect = 0;
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}
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--decoder->timings_cnt;
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shift_left_array(decoder->timings, decoder->timings_cnt, 1);
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status = IrdaStatusOk;
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bool level = (decoder->level + decoder->timings_cnt) % 2;
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if (decoder->databit_cnt < decoder->protocol->databit_len) {
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if (*switch_detect) {
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uint8_t index = decoder->databit_cnt / 8;
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uint8_t shift = decoder->databit_cnt % 8; // LSB first
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if (!shift)
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decoder->data[index] = 0;
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decoder->data[index] |= (level << shift);
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++decoder->databit_cnt;
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}
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if (decoder->databit_cnt == decoder->protocol->databit_len) {
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if (level) {
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status = IrdaStatusReady;
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break;
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}
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}
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} else {
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furi_assert(level);
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/* cover case: sequence should be stopped after last bit was received */
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if (single_timing) {
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status = IrdaStatusReady;
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break;
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} else {
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status = IrdaStatusError;
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}
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}
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}
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return status;
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}
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IrdaMessage* irda_common_decode(IrdaCommonDecoder* decoder, bool level, uint32_t duration) {
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furi_assert(decoder);
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IrdaMessage* message = 0;
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IrdaStatus status = IrdaStatusError;
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if (decoder->level == level) {
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decoder->timings_cnt = 0;
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}
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decoder->level = level; // start with low level (Space timing)
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decoder->timings[decoder->timings_cnt] = duration;
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decoder->timings_cnt++;
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furi_check(decoder->timings_cnt <= sizeof(decoder->timings));
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while(1) {
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switch (decoder->state) {
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case IrdaCommonDecoderStateWaitPreamble:
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if (irda_check_preamble(decoder)) {
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decoder->state = IrdaCommonDecoderStateDecode;
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decoder->databit_cnt = 0;
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decoder->switch_detect = false;
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continue;
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}
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break;
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case IrdaCommonDecoderStateDecode:
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status = decoder->protocol->decode(decoder);
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if (status == IrdaStatusReady) {
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if (decoder->protocol->interpret(decoder)) {
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message = &decoder->message;
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decoder->state = IrdaCommonDecoderStateProcessRepeat;
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} else {
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decoder->state = IrdaCommonDecoderStateWaitPreamble;
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}
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} else if (status == IrdaStatusError) {
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irda_common_decoder_reset_state(decoder);
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continue;
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}
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break;
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case IrdaCommonDecoderStateProcessRepeat:
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if (!decoder->protocol->decode_repeat) {
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decoder->state = IrdaCommonDecoderStateWaitPreamble;
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continue;
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}
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status = decoder->protocol->decode_repeat(decoder);
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if (status == IrdaStatusError) {
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irda_common_decoder_reset_state(decoder);
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continue;
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} else if (status == IrdaStatusReady) {
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decoder->message.repeat = true;
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message = &decoder->message;
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}
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break;
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}
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break;
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}
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return message;
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}
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void* irda_common_decoder_alloc(const IrdaCommonProtocolSpec* protocol) {
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furi_assert(protocol);
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uint32_t alloc_size = sizeof(IrdaCommonDecoder)
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+ protocol->databit_len / 8
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+ !!(protocol->databit_len % 8);
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IrdaCommonDecoder* decoder = furi_alloc(alloc_size);
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memset(decoder, 0, alloc_size);
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decoder->protocol = protocol;
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decoder->level = true;
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return decoder;
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}
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void irda_common_decoder_set_context(void* decoder, void* context) {
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IrdaCommonDecoder* common_decoder = decoder;
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common_decoder->context = context;
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}
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void irda_common_decoder_free(void* decoder) {
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furi_assert(decoder);
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free(decoder);
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}
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void irda_common_decoder_reset_state(IrdaCommonDecoder* common_decoder) {
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common_decoder->state = IrdaCommonDecoderStateWaitPreamble;
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common_decoder->databit_cnt = 0;
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common_decoder->switch_detect = false;
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common_decoder->message.protocol = IrdaProtocolUnknown;
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if (common_decoder->protocol->timings.preamble_mark == 0) {
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--common_decoder->timings_cnt;
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shift_left_array(common_decoder->timings, common_decoder->timings_cnt, 1);
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}
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}
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void irda_common_decoder_reset(void* decoder) {
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furi_assert(decoder);
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IrdaCommonDecoder* common_decoder = decoder;
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irda_common_decoder_reset_state(common_decoder);
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common_decoder->timings_cnt = 0;
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}
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160
lib/irda/encoder_decoder/common/irda_common_encoder.c
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160
lib/irda/encoder_decoder/common/irda_common_encoder.c
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@@ -0,0 +1,160 @@
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#include "furi/check.h"
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#include "irda.h"
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#include "irda_common_i.h"
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#include <stdbool.h>
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#include <furi.h>
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#include "irda_i.h"
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/*
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*
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* 3:
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* even_timing = 0
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* level = 0 ^ 1 = 1
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* 4:
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* even_timing = 1
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* level = 1 ^ 1 = 0
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* ++timing;
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*
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*
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* 0 1 2 | 3 4 |
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* _____-------_____---___
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*/
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IrdaStatus irda_common_encode_manchester(IrdaCommonEncoder* encoder, uint32_t* duration, bool* level) {
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furi_assert(encoder);
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furi_assert(duration);
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furi_assert(level);
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const IrdaTimings* timings = &encoder->protocol->timings;
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uint8_t index = encoder->bits_encoded / 8;
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uint8_t shift = encoder->bits_encoded % 8; // LSB first
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bool logic_value = !!(encoder->data[index] & (0x01 << shift));
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bool even_timing = !(encoder->timings_encoded % 2);
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*level = even_timing ^ logic_value;
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*duration = timings->bit1_mark;
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if (even_timing) /* start encoding from space */
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++encoder->bits_encoded;
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++encoder->timings_encoded;
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bool finish = (encoder->bits_encoded == encoder->protocol->databit_len);
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finish |= (encoder->bits_encoded == (encoder->protocol->databit_len-1)) && *level && !even_timing;
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return finish ? IrdaStatusDone : IrdaStatusOk;
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}
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IrdaStatus irda_common_encode_pdwm(IrdaCommonEncoder* encoder, uint32_t* duration, bool* level) {
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furi_assert(encoder);
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furi_assert(duration);
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furi_assert(level);
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const IrdaTimings* timings = &encoder->protocol->timings;
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uint8_t index = encoder->bits_encoded / 8;
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uint8_t shift = encoder->bits_encoded % 8; // LSB first
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bool logic_value = !!(encoder->data[index] & (0x01 << shift));
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// stop bit
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if (encoder->bits_encoded == encoder->protocol->databit_len) {
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*duration = timings->bit1_mark;
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*level = true;
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++encoder->timings_encoded;
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return IrdaStatusDone;
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}
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if (encoder->timings_encoded % 2) { /* start encoding from space */
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*duration = logic_value ? timings->bit1_mark : timings->bit0_mark;
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*level = true;
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} else {
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*duration = logic_value ? timings->bit1_space : timings->bit0_space;
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*level = false;
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++encoder->bits_encoded;
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}
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++encoder->timings_encoded;
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return IrdaStatusOk;
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}
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IrdaStatus irda_common_encode(IrdaCommonEncoder* encoder, uint32_t* duration, bool* level) {
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furi_assert(encoder);
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furi_assert(duration);
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furi_assert(level);
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IrdaStatus status = IrdaStatusOk;
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const IrdaTimings* timings = &encoder->protocol->timings;
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switch (encoder->state) {
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case IrdaCommonEncoderStateSpace:
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*duration = encoder->protocol->timings.silence_time;
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*level = false;
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status = IrdaStatusOk;
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encoder->state = IrdaCommonEncoderStatePreamble;
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++encoder->timings_encoded;
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break;
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case IrdaCommonEncoderStatePreamble:
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if (timings->preamble_mark) {
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if (encoder->timings_encoded == 1) {
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*duration = timings->preamble_mark;
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*level = true;
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} else {
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*duration = timings->preamble_space;
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*level = false;
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encoder->state = IrdaCommonEncoderStateEncode;
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}
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++encoder->timings_encoded;
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break;
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} else {
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encoder->state = IrdaCommonEncoderStateEncode;
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}
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/* FALLTHROUGH */
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case IrdaCommonEncoderStateEncode:
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status = encoder->protocol->encode(encoder, duration, level);
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if (status == IrdaStatusDone) {
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if (encoder->protocol->encode_repeat) {
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encoder->state = IrdaCommonEncoderStateEncodeRepeat;
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} else {
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encoder->timings_encoded = 0;
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encoder->bits_encoded = 0;
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encoder->switch_detect = 0;
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encoder->state = IrdaCommonEncoderStateSpace;
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}
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}
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break;
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case IrdaCommonEncoderStateEncodeRepeat:
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status = encoder->protocol->encode_repeat(encoder, duration, level);
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break;
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}
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return status;
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}
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void* irda_common_encoder_alloc(const IrdaCommonProtocolSpec* protocol) {
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furi_assert(protocol);
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uint32_t alloc_size = sizeof(IrdaCommonEncoder)
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+ protocol->databit_len / 8
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+ !!(protocol->databit_len % 8);
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IrdaCommonEncoder* encoder = furi_alloc(alloc_size);
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memset(encoder, 0, alloc_size);
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encoder->protocol = protocol;
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return encoder;
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}
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void irda_common_encoder_free(IrdaCommonEncoder* encoder) {
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furi_assert(encoder);
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free(encoder);
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}
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void irda_common_encoder_reset(IrdaCommonEncoder* encoder) {
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furi_assert(encoder);
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encoder->timings_encoded = 0;
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encoder->bits_encoded = 0;
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encoder->state = IrdaCommonEncoderStateSpace;
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encoder->switch_detect = 0;
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uint8_t bytes_to_clear = encoder->protocol->databit_len / 8
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+ !!(encoder->protocol->databit_len % 8);
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memset(encoder->data, 0, bytes_to_clear);
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}
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void irda_common_encoder_set_context(void* decoder, void* context) {
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IrdaCommonEncoder* common_encoder = decoder;
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common_encoder->context = context;
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}
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|
90
lib/irda/encoder_decoder/common/irda_common_i.h
Normal file
90
lib/irda/encoder_decoder/common/irda_common_i.h
Normal file
@@ -0,0 +1,90 @@
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#pragma once
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#include <stdint.h>
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#include "irda.h"
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#include "irda_i.h"
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#define MATCH_BIT_TIMING(x, v, delta) ( ((x) < (v + delta)) \
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&& ((x) > (v - delta)))
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#define MATCH_PREAMBLE_TIMING(x, v, delta) ( ((x) < ((v) * (1 + (delta)))) \
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&& ((x) > ((v) * (1 - (delta)))))
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typedef struct IrdaCommonDecoder IrdaCommonDecoder;
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typedef struct IrdaCommonEncoder IrdaCommonEncoder;
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typedef IrdaStatus (*IrdaCommonDecode)(IrdaCommonDecoder*);
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typedef bool (*IrdaCommonInterpret)(IrdaCommonDecoder*);
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typedef IrdaStatus (*IrdaCommonEncode)(IrdaCommonEncoder* encoder, uint32_t* out, bool* polarity);
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typedef struct {
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IrdaTimings timings;
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bool manchester_start_from_space;
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uint32_t databit_len;
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IrdaCommonDecode decode;
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IrdaCommonDecode decode_repeat;
|
||||
IrdaCommonInterpret interpret;
|
||||
IrdaCommonEncode encode;
|
||||
IrdaCommonEncode encode_repeat;
|
||||
} IrdaCommonProtocolSpec;
|
||||
|
||||
typedef enum {
|
||||
IrdaCommonDecoderStateWaitPreamble,
|
||||
IrdaCommonDecoderStateDecode,
|
||||
IrdaCommonDecoderStateProcessRepeat,
|
||||
} IrdaCommonStateDecoder;
|
||||
|
||||
typedef enum {
|
||||
IrdaCommonEncoderStateSpace,
|
||||
IrdaCommonEncoderStatePreamble,
|
||||
IrdaCommonEncoderStateEncode,
|
||||
IrdaCommonEncoderStateEncodeRepeat,
|
||||
} IrdaCommonStateEncoder;
|
||||
|
||||
struct IrdaCommonDecoder {
|
||||
const IrdaCommonProtocolSpec* protocol;
|
||||
IrdaCommonStateDecoder state;
|
||||
IrdaMessage message;
|
||||
uint32_t timings[6];
|
||||
uint8_t timings_cnt;
|
||||
void* context;
|
||||
bool switch_detect;
|
||||
uint32_t level;
|
||||
uint16_t databit_cnt;
|
||||
uint8_t data[];
|
||||
};
|
||||
|
||||
struct IrdaCommonEncoder {
|
||||
const IrdaCommonProtocolSpec* protocol;
|
||||
IrdaCommonStateEncoder state;
|
||||
bool switch_detect;
|
||||
uint32_t bits_encoded;
|
||||
uint32_t timings_encoded;
|
||||
void* context;
|
||||
uint8_t data[];
|
||||
};
|
||||
|
||||
|
||||
static inline void shift_left_array(uint32_t *array, uint32_t len, uint32_t shift) {
|
||||
for (int i = 0; i < len; ++i)
|
||||
array[i] = array[i + shift];
|
||||
}
|
||||
|
||||
|
||||
IrdaMessage* irda_common_decode(IrdaCommonDecoder *decoder, bool level, uint32_t duration);
|
||||
IrdaStatus irda_common_decode_pdwm(IrdaCommonDecoder* decoder);
|
||||
IrdaStatus irda_common_decode_manchester(IrdaCommonDecoder* decoder);
|
||||
void irda_common_decoder_set_context(void* decoder, void* context);
|
||||
void* irda_common_decoder_alloc(const IrdaCommonProtocolSpec *protocol);
|
||||
void irda_common_decoder_free(void* decoder);
|
||||
void irda_common_decoder_reset(void* decoder);
|
||||
|
||||
IrdaStatus irda_common_encode(IrdaCommonEncoder* encoder, uint32_t* duration, bool* polarity);
|
||||
IrdaStatus irda_common_encode_pdwm(IrdaCommonEncoder* encoder, uint32_t* duration, bool* polarity);
|
||||
IrdaStatus irda_common_encode_manchester(IrdaCommonEncoder* encoder, uint32_t* duration, bool* polarity);
|
||||
void irda_common_encoder_set_context(void* decoder, void* context);
|
||||
void* irda_common_encoder_alloc(const IrdaCommonProtocolSpec* protocol);
|
||||
void irda_common_encoder_free(IrdaCommonEncoder* encoder);
|
||||
void irda_common_encoder_reset(IrdaCommonEncoder* encoder);
|
||||
|
79
lib/irda/encoder_decoder/common/irda_common_protocol_defs.c
Normal file
79
lib/irda/encoder_decoder/common/irda_common_protocol_defs.c
Normal file
@@ -0,0 +1,79 @@
|
||||
#include "irda_common_i.h"
|
||||
#include "irda_protocol_defs_i.h"
|
||||
|
||||
const IrdaCommonProtocolSpec protocol_nec = {
|
||||
.timings = {
|
||||
.preamble_mark = IRDA_NEC_PREAMBULE_MARK,
|
||||
.preamble_space = IRDA_NEC_PREAMBULE_SPACE,
|
||||
.bit1_mark = IRDA_NEC_BIT1_MARK,
|
||||
.bit1_space = IRDA_NEC_BIT1_SPACE,
|
||||
.bit0_mark = IRDA_NEC_BIT0_MARK,
|
||||
.bit0_space = IRDA_NEC_BIT0_SPACE,
|
||||
.preamble_tolerance = IRDA_NEC_PREAMBLE_TOLERANCE,
|
||||
.bit_tolerance = IRDA_NEC_BIT_TOLERANCE,
|
||||
.silence_time = IRDA_NEC_SILENCE,
|
||||
},
|
||||
.databit_len = 32,
|
||||
.decode = irda_common_decode_pdwm,
|
||||
.encode = irda_common_encode_pdwm,
|
||||
.interpret = irda_decoder_nec_interpret,
|
||||
.decode_repeat = irda_decoder_nec_decode_repeat,
|
||||
.encode_repeat = irda_encoder_nec_encode_repeat,
|
||||
};
|
||||
|
||||
const IrdaCommonProtocolSpec protocol_samsung32 = {
|
||||
.timings = {
|
||||
.preamble_mark = IRDA_SAMSUNG_PREAMBULE_MARK,
|
||||
.preamble_space = IRDA_SAMSUNG_PREAMBULE_SPACE,
|
||||
.bit1_mark = IRDA_SAMSUNG_BIT1_MARK,
|
||||
.bit1_space = IRDA_SAMSUNG_BIT1_SPACE,
|
||||
.bit0_mark = IRDA_SAMSUNG_BIT0_MARK,
|
||||
.bit0_space = IRDA_SAMSUNG_BIT0_SPACE,
|
||||
.preamble_tolerance = IRDA_SAMSUNG_PREAMBLE_TOLERANCE,
|
||||
.bit_tolerance = IRDA_SAMSUNG_BIT_TOLERANCE,
|
||||
.silence_time = IRDA_SAMSUNG_SILENCE,
|
||||
},
|
||||
.databit_len = 32,
|
||||
.decode = irda_common_decode_pdwm,
|
||||
.encode = irda_common_encode_pdwm,
|
||||
.interpret = irda_decoder_samsung32_interpret,
|
||||
.decode_repeat = irda_decoder_samsung32_decode_repeat,
|
||||
.encode_repeat = irda_encoder_samsung32_encode_repeat,
|
||||
};
|
||||
|
||||
const IrdaCommonProtocolSpec protocol_rc6 = {
|
||||
.timings = {
|
||||
.preamble_mark = IRDA_RC6_PREAMBULE_MARK,
|
||||
.preamble_space = IRDA_RC6_PREAMBULE_SPACE,
|
||||
.bit1_mark = IRDA_RC6_BIT,
|
||||
.preamble_tolerance = IRDA_RC6_PREAMBLE_TOLERANCE,
|
||||
.bit_tolerance = IRDA_RC6_BIT_TOLERANCE,
|
||||
.silence_time = IRDA_RC6_SILENCE,
|
||||
},
|
||||
.databit_len = 1 + 3 + 1 + 8 + 8, // start_bit + 3 mode bits, + 1 toggle bit (x2 timing) + 8 address + 8 command
|
||||
.manchester_start_from_space = false,
|
||||
.decode = irda_decoder_rc6_decode_manchester,
|
||||
.encode = irda_encoder_rc6_encode_manchester,
|
||||
.interpret = irda_decoder_rc6_interpret,
|
||||
.decode_repeat = NULL,
|
||||
.encode_repeat = NULL,
|
||||
};
|
||||
|
||||
const IrdaCommonProtocolSpec protocol_rc5 = {
|
||||
.timings = {
|
||||
.preamble_mark = 0,
|
||||
.preamble_space = 0,
|
||||
.bit1_mark = IRDA_RC5_BIT,
|
||||
.preamble_tolerance = 0,
|
||||
.bit_tolerance = IRDA_RC5_BIT_TOLERANCE,
|
||||
.silence_time = IRDA_RC5_SILENCE,
|
||||
},
|
||||
.databit_len = 1 + 1 + 1 + 5 + 6, // start_bit + start_bit/command_bit + toggle_bit + 5 address + 6 command
|
||||
.manchester_start_from_space = true,
|
||||
.decode = irda_common_decode_manchester,
|
||||
.encode = irda_common_encode_manchester,
|
||||
.interpret = irda_decoder_rc5_interpret,
|
||||
.decode_repeat = NULL,
|
||||
.encode_repeat = NULL,
|
||||
};
|
||||
|
Reference in New Issue
Block a user