mirror of https://github.com/esphome/esphome.git
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
#include "mirage_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.mirage";
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constexpr uint32_t HEADER_MARK_US = 8360;
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constexpr uint32_t HEADER_SPACE_US = 4248;
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constexpr uint32_t BIT_MARK_US = 554;
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constexpr uint32_t BIT_ONE_SPACE_US = 1592;
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constexpr uint32_t BIT_ZERO_SPACE_US = 545;
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constexpr unsigned int MIRAGE_IR_PACKET_BIT_SIZE = 120;
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void MirageProtocol::encode(RemoteTransmitData *dst, const MirageData &data) {
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ESP_LOGI(TAG, "Transive Mirage: %s", format_hex_pretty(data.data).c_str());
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dst->set_carrier_frequency(38000);
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dst->reserve(5 + ((data.data.size() + 1) * 2));
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dst->mark(HEADER_MARK_US);
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dst->space(HEADER_SPACE_US);
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dst->mark(BIT_MARK_US);
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uint8_t checksum = 0;
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for (uint8_t item : data.data) {
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this->encode_byte_(dst, item);
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checksum += (item >> 4) + (item & 0xF);
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}
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this->encode_byte_(dst, checksum);
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}
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void MirageProtocol::encode_byte_(RemoteTransmitData *dst, uint8_t item) {
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for (uint8_t b = 0; b < 8; b++) {
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if (item & (1UL << b)) {
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dst->space(BIT_ONE_SPACE_US);
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} else {
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dst->space(BIT_ZERO_SPACE_US);
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}
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dst->mark(BIT_MARK_US);
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}
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}
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optional<MirageData> MirageProtocol::decode(RemoteReceiveData src) {
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if (!src.expect_item(HEADER_MARK_US, HEADER_SPACE_US)) {
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return {};
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}
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if (!src.expect_mark(BIT_MARK_US)) {
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return {};
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}
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size_t size = src.size() - src.get_index() - 1;
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if (size < MIRAGE_IR_PACKET_BIT_SIZE * 2)
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return {};
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size = MIRAGE_IR_PACKET_BIT_SIZE * 2;
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uint8_t checksum = 0;
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MirageData out;
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while (size > 0) {
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uint8_t data = 0;
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for (uint8_t b = 0; b < 8; b++) {
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if (src.expect_space(BIT_ONE_SPACE_US)) {
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data |= (1UL << b);
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} else if (!src.expect_space(BIT_ZERO_SPACE_US)) {
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return {};
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}
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if (!src.expect_mark(BIT_MARK_US)) {
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return {};
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}
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size -= 2;
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}
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if (size > 0) {
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checksum += (data >> 4) + (data & 0xF);
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out.data.push_back(data);
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} else if (checksum != data) {
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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 MirageProtocol::dump(const MirageData &data) {
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ESP_LOGI(TAG, "Received Mirage: %s", format_hex_pretty(data.data).c_str());
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}
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} // namespace remote_base
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} // namespace esphome
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