mirror of https://github.com/esphome/esphome.git
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
#include "lg_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.lg";
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static const uint32_t HEADER_HIGH_US = 8000;
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static const uint32_t HEADER_LOW_US = 4000;
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static const uint32_t BIT_HIGH_US = 600;
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static const uint32_t BIT_ONE_LOW_US = 1600;
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static const uint32_t BIT_ZERO_LOW_US = 550;
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void LGProtocol::encode(RemoteTransmitData *dst, const LGData &data) {
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dst->set_carrier_frequency(38000);
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dst->reserve(2 + data.nbits * 2u);
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dst->item(HEADER_HIGH_US, HEADER_LOW_US);
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for (uint32_t mask = 1UL << (data.nbits - 1); mask != 0; mask >>= 1) {
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if (data.data & 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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dst->mark(BIT_HIGH_US);
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}
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optional<LGData> LGProtocol::decode(RemoteReceiveData src) {
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LGData out{
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.data = 0,
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.nbits = 0,
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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 (out.nbits = 0; out.nbits < 32; out.nbits++) {
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if (src.expect_item(BIT_HIGH_US, BIT_ONE_LOW_US)) {
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out.data = (out.data << 1) | 1;
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} else if (src.expect_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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out.data = (out.data << 1) | 0;
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} else if (out.nbits == 28) {
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return out;
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} else {
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return {};
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}
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}
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return out;
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}
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void LGProtocol::dump(const LGData &data) {
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ESP_LOGD(TAG, "Received LG: data=0x%08X, nbits=%d", data.data, data.nbits);
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}
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} // namespace remote_base
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} // namespace esphome
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