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https://github.com/esphome/esphome.git
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76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
#include "midea_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.midea";
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static const int32_t TICK_US = 560;
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static const int32_t HEADER_MARK_US = 8 * TICK_US;
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static const int32_t HEADER_SPACE_US = 8 * TICK_US;
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static const int32_t BIT_MARK_US = 1 * TICK_US;
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static const int32_t BIT_ONE_SPACE_US = 3 * TICK_US;
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static const int32_t BIT_ZERO_SPACE_US = 1 * TICK_US;
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static const int32_t FOOTER_MARK_US = 1 * TICK_US;
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static const int32_t FOOTER_SPACE_US = 10 * TICK_US;
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uint8_t MideaData::calc_cs_() const {
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uint8_t cs = 0;
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for (uint8_t idx = 0; idx < OFFSET_CS; idx++)
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cs -= reverse_bits(this->data_[idx]);
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return reverse_bits(cs);
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}
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bool MideaData::is_compliment(const MideaData &rhs) const {
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return std::equal(this->data_.begin(), this->data_.end(), rhs.data_.begin(),
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[](const uint8_t &a, const uint8_t &b) { return a + b == 255; });
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}
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void MideaProtocol::encode(RemoteTransmitData *dst, const MideaData &src) {
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dst->set_carrier_frequency(38000);
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dst->reserve(2 + 48 * 2 + 2 + 2 + 48 * 2 + 1);
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dst->item(HEADER_MARK_US, HEADER_SPACE_US);
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for (unsigned idx = 0; idx < 6; idx++) {
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for (uint8_t mask = 1 << 7; mask; mask >>= 1)
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dst->item(BIT_MARK_US, (src[idx] & mask) ? BIT_ONE_SPACE_US : BIT_ZERO_SPACE_US);
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}
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dst->item(FOOTER_MARK_US, FOOTER_SPACE_US);
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dst->item(HEADER_MARK_US, HEADER_SPACE_US);
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for (unsigned idx = 0; idx < 6; idx++) {
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for (uint8_t mask = 1 << 7; mask; mask >>= 1)
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dst->item(BIT_MARK_US, (src[idx] & mask) ? BIT_ZERO_SPACE_US : BIT_ONE_SPACE_US);
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}
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dst->mark(FOOTER_MARK_US);
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}
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static bool decode_data(RemoteReceiveData &src, MideaData &dst) {
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for (unsigned idx = 0; idx < 6; idx++) {
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uint8_t data = 0;
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for (uint8_t mask = 1 << 7; mask; mask >>= 1) {
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if (!src.expect_mark(BIT_MARK_US))
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return false;
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if (src.expect_space(BIT_ONE_SPACE_US)) {
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data |= mask;
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} else if (!src.expect_space(BIT_ZERO_SPACE_US)) {
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return false;
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}
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}
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dst[idx] = data;
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}
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return true;
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}
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optional<MideaData> MideaProtocol::decode(RemoteReceiveData src) {
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MideaData out, inv;
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if (src.expect_item(HEADER_MARK_US, HEADER_SPACE_US) && decode_data(src, out) && out.is_valid() &&
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src.expect_item(FOOTER_MARK_US, FOOTER_SPACE_US) && src.expect_item(HEADER_MARK_US, HEADER_SPACE_US) &&
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decode_data(src, inv) && src.expect_mark(FOOTER_MARK_US) && out.is_compliment(inv))
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return out;
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return {};
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}
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void MideaProtocol::dump(const MideaData &data) { ESP_LOGD(TAG, "Received Midea: %s", data.to_string().c_str()); }
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} // namespace remote_base
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} // namespace esphome
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