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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#include "ndef_record.h"
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namespace esphome {
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namespace nfc {
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static const char *const TAG = "nfc.ndef_record";
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NdefRecord::NdefRecord(std::vector<uint8_t> payload_data) {
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this->payload_ = std::string(payload_data.begin(), payload_data.end());
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}
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std::vector<uint8_t> NdefRecord::encode(bool first, bool last) {
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std::vector<uint8_t> data;
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// Get encoded payload, this is overriden by more specific record classes
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std::vector<uint8_t> payload_data = get_encoded_payload();
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size_t payload_length = payload_data.size();
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data.push_back(this->create_flag_byte(first, last, payload_length));
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data.push_back(this->type_.length());
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if (payload_length <= 255) {
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data.push_back(payload_length);
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} else {
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data.push_back(0);
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data.push_back(0);
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data.push_back((payload_length >> 8) & 0xFF);
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data.push_back(payload_length & 0xFF);
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}
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if (this->id_.length()) {
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data.push_back(this->id_.length());
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}
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data.insert(data.end(), this->type_.begin(), this->type_.end());
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if (this->id_.length()) {
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data.insert(data.end(), this->id_.begin(), this->id_.end());
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}
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data.insert(data.end(), payload_data.begin(), payload_data.end());
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return data;
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}
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uint8_t NdefRecord::create_flag_byte(bool first, bool last, size_t payload_size) {
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uint8_t value = this->tnf_ & 0b00000111;
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if (first) {
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value = value | 0x80; // Set MB bit
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}
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if (last) {
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value = value | 0x40; // Set ME bit
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}
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if (payload_size <= 255) {
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value = value | 0x10; // Set SR bit
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}
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if (this->id_.length()) {
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value = value | 0x08; // Set IL bit
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}
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return value;
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};
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} // namespace nfc
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} // namespace esphome
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