mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 19:54:14 +01:00
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
#include "rdm6300.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace rdm6300 {
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static const char *const TAG = "rdm6300";
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static const uint8_t RDM6300_START_BYTE = 0x02;
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static const uint8_t RDM6300_END_BYTE = 0x03;
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static const int8_t RDM6300_STATE_WAITING_FOR_START = -1;
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void rdm6300::RDM6300Component::loop() {
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while (this->available() > 0) {
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uint8_t data;
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if (!this->read_byte(&data)) {
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ESP_LOGW(TAG, "Reading data from RDM6300 failed!");
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this->status_set_warning();
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return;
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}
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if (this->read_state_ == RDM6300_STATE_WAITING_FOR_START) {
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if (data == RDM6300_START_BYTE) {
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this->read_state_ = 0;
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} else {
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// Not start byte, probably not synced up correctly.
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}
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} else if (this->read_state_ < 12) {
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uint8_t value = (data > '9') ? data - '7' : data - '0';
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if (this->read_state_ % 2 == 0) {
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this->buffer_[this->read_state_ / 2] = value << 4;
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} else {
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this->buffer_[this->read_state_ / 2] += value;
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}
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this->read_state_++;
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} else if (data != RDM6300_END_BYTE) {
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ESP_LOGW(TAG, "Invalid end byte from RDM6300!");
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this->read_state_ = RDM6300_STATE_WAITING_FOR_START;
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} else {
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uint8_t checksum = 0;
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for (uint8_t i = 0; i < 5; i++)
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checksum ^= this->buffer_[i];
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this->read_state_ = RDM6300_STATE_WAITING_FOR_START;
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if (checksum != this->buffer_[5]) {
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ESP_LOGW(TAG, "Checksum from RDM6300 doesn't match! (0x%02X!=0x%02X)", checksum, this->buffer_[5]);
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} else {
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// Valid data
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this->status_clear_warning();
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const uint32_t result = encode_uint32(this->buffer_[1], this->buffer_[2], this->buffer_[3], this->buffer_[4]);
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bool report = result != last_id_;
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for (auto *card : this->cards_) {
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if (card->process(result)) {
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report = false;
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}
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}
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for (auto *trig : this->triggers_)
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trig->process(result);
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if (report) {
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ESP_LOGD(TAG, "Found new tag with ID %u", result);
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}
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}
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}
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}
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}
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} // namespace rdm6300
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} // namespace esphome
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