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102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
#include "nec_protocol.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace remote_base {
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static const char *const TAG = "remote.nec";
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static const uint32_t HEADER_HIGH_US = 9000;
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static const uint32_t HEADER_LOW_US = 4500;
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static const uint32_t BIT_HIGH_US = 560;
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static const uint32_t BIT_ONE_LOW_US = 1690;
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static const uint32_t BIT_ZERO_LOW_US = 560;
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void NECProtocol::encode(RemoteTransmitData *dst, const NECData &data) {
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ESP_LOGD(TAG, "Sending NEC: address=0x%04X, command=0x%04X command_repeats=%d", data.address, data.command,
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data.command_repeats);
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dst->reserve(2 + 32 + 32 * data.command_repeats + 2);
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dst->set_carrier_frequency(38000);
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dst->item(HEADER_HIGH_US, HEADER_LOW_US);
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for (uint16_t mask = 1; mask; mask <<= 1) {
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if (data.address & mask) {
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dst->item(BIT_HIGH_US, BIT_ONE_LOW_US);
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} else {
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dst->item(BIT_HIGH_US, BIT_ZERO_LOW_US);
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}
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}
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for (uint16_t repeats = 0; repeats < data.command_repeats; repeats++) {
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for (uint16_t mask = 1; mask; mask <<= 1) {
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if (data.command & mask) {
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dst->item(BIT_HIGH_US, BIT_ONE_LOW_US);
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} else {
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dst->item(BIT_HIGH_US, BIT_ZERO_LOW_US);
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}
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}
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}
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dst->mark(BIT_HIGH_US);
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}
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optional<NECData> NECProtocol::decode(RemoteReceiveData src) {
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NECData data{
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.address = 0,
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.command = 0,
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.command_repeats = 1,
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};
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if (!src.expect_item(HEADER_HIGH_US, HEADER_LOW_US))
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return {};
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for (uint16_t mask = 1; mask; mask <<= 1) {
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if (src.expect_item(BIT_HIGH_US, BIT_ONE_LOW_US)) {
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data.address |= mask;
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} else if (src.expect_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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data.address &= ~mask;
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} else {
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return {};
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}
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}
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for (uint16_t mask = 1; mask; mask <<= 1) {
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if (src.expect_item(BIT_HIGH_US, BIT_ONE_LOW_US)) {
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data.command |= mask;
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} else if (src.expect_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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data.command &= ~mask;
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} else {
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return {};
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}
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}
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while (src.peek_item(BIT_HIGH_US, BIT_ONE_LOW_US) || src.peek_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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uint16_t command = 0;
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for (uint16_t mask = 1; mask; mask <<= 1) {
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if (src.expect_item(BIT_HIGH_US, BIT_ONE_LOW_US)) {
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command |= mask;
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} else if (src.expect_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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command &= ~mask;
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} else {
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return {};
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}
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}
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// Make sure the extra/repeated data matches original command
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if (command != data.command) {
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return {};
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}
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data.command_repeats += 1;
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}
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src.expect_mark(BIT_HIGH_US);
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return data;
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}
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void NECProtocol::dump(const NECData &data) {
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ESP_LOGI(TAG, "Received NEC: address=0x%04X, command=0x%04X command_repeats=%d", data.address, data.command,
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data.command_repeats);
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}
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} // namespace remote_base
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} // namespace esphome
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