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https://github.com/esphome/esphome.git
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94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
#include "dish_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.dish";
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static const uint32_t HEADER_HIGH_US = 400;
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static const uint32_t HEADER_LOW_US = 6100;
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static const uint32_t BIT_HIGH_US = 400;
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static const uint32_t BIT_ONE_LOW_US = 1700;
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static const uint32_t BIT_ZERO_LOW_US = 2800;
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void DishProtocol::encode(RemoteTransmitData *dst, const DishData &data) {
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dst->reserve(138);
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dst->set_carrier_frequency(57600);
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// HEADER
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dst->item(HEADER_HIGH_US, HEADER_LOW_US);
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// Typically a DISH device needs to get a command a total of
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// at least 4 times to accept it.
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for (uint i = 0; i < 4; i++) {
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// COMMAND (function, in MSB)
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for (uint8_t mask = 1UL << 5; 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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// ADDRESS (unit code, in LSB)
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for (uint8_t mask = 1UL; mask < 1UL << 4; mask <<= 1) {
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if ((data.address - 1) & 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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// PADDING
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for (uint j = 0; j < 6; j++)
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dst->item(BIT_HIGH_US, BIT_ZERO_LOW_US);
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// FOOTER
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dst->item(HEADER_HIGH_US, HEADER_LOW_US);
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}
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}
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optional<DishData> DishProtocol::decode(RemoteReceiveData src) {
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DishData data{
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.address = 0,
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.command = 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 (uint8_t mask = 1UL << 5; mask != 0; 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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for (uint8_t mask = 1UL; mask < 1UL << 5; 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 (uint j = 0; j < 6; j++) {
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if (!src.expect_item(BIT_HIGH_US, BIT_ZERO_LOW_US)) {
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return {};
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}
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}
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data.address++;
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src.expect_item(HEADER_HIGH_US, HEADER_LOW_US);
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return data;
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}
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void DishProtocol::dump(const DishData &data) {
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ESP_LOGD(TAG, "Received Dish: address=0x%02X, command=0x%02X", data.address, data.command);
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}
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} // namespace remote_base
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} // namespace esphome
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