rc522_i2c.cpp

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#include "rc522_i2c.h"
#include "esphome/core/log.h"
 
namespace esphome {
namespace rc522_i2c {
 
static const char *const TAG = "rc522_i2c";
 
void RC522I2C::dump_config() {
  RC522::dump_config();
  LOG_I2C_DEVICE(this);
}
 
uint8_t RC522I2C::pcd_read_register(PcdRegister reg  
) {
  uint8_t value;
  if (!read_byte(reg >> 1, &value))
    return 0;
  ESP_LOGVV(TAG, "read_register_(%x) -> %u", reg, value);
  return value;
}
 
void RC522I2C::pcd_read_register(PcdRegister reg,  
                                 uint8_t count,    
                                 uint8_t *values,  
                                 uint8_t rx_align  
) {
  if (count == 0) {
    return;
  }
 
  uint8_t b = values[0];
  read_bytes(reg >> 1, values, count);
 
  if (rx_align)  // Only update bit positions rxAlign..7 in values[0]
  {
    // Create bit mask for bit positions rxAlign..7
    uint8_t mask = 0xFF << rx_align;
    // Apply mask to both current value of values[0] and the new data in values array.
    values[0] = (b & ~mask) | (values[0] & mask);
  }
}
 
void RC522I2C::pcd_write_register(PcdRegister reg,  
                                  uint8_t value     
) {
  this->write_byte(reg >> 1, value);
}
 
void RC522I2C::pcd_write_register(PcdRegister reg,  
                                  uint8_t count,    
                                  uint8_t *values   
) {
  write_bytes(reg >> 1, values, count);
}
 
}  // namespace rc522_i2c
}  // namespace esphome