pn7160_i2c.cpp

Go to the documentation of this file.

#include "pn7160_i2c.h"
#include "esphome/core/log.h"
#include "esphome/core/hal.h"
 
namespace esphome::pn7160_i2c {
 
ESPHOME_LOG_TAG(TAG, "pn7160_i2c");
 
uint8_t PN7160I2C::read_nfcc(nfc::NciMessage &rx, const uint16_t timeout) {
  if (this->wait_for_irq_(timeout) != nfc::STATUS_OK) {
    ESP_LOGW(TAG, "read_nfcc_() timeout waiting for IRQ");
    return nfc::STATUS_FAILED;
  }
 
  rx.reset();
  if (!this->read_bytes_raw(rx.get_message().data(), nfc::NCI_PKT_HEADER_SIZE)) {
    return nfc::STATUS_FAILED;
  }
 
  const uint8_t length = rx.get_payload_size();
  rx.set_payload_size(length);
  if (length > 0 && !this->read_bytes_raw(rx.get_message().data() + nfc::NCI_PKT_HEADER_SIZE, length)) {
    return nfc::STATUS_FAILED;
  }
  // IRQ normally drops at the end of the read. If another message is queued it rises again at once, and the short
  // low pulse may be missed; that means more data is waiting, not that this read failed (UM11495, 6.2.4).
  if (this->wait_for_irq_(pn71xx::NFCC_IRQ_CLEAR_TIMEOUT, false) != nfc::STATUS_OK) {
    ESP_LOGVV(TAG, "IRQ still active after read; another message is pending");
  }
  return nfc::STATUS_OK;
}
 
uint8_t PN7160I2C::write_nfcc(nfc::NciMessage &tx) {
  const auto encoded = tx.encode();
  if (this->write(encoded.data(), encoded.size()) == i2c::ERROR_OK) {
    return nfc::STATUS_OK;
  }
  return nfc::STATUS_FAILED;
}
 
void PN7160I2C::dump_config() {
  PN7160::dump_config();
  LOG_I2C_DEVICE(this);
}
 
}  // namespace esphome::pn7160_i2c