mac.cpp

/**\file mac.cpp
\brief Read the mac address.
 */
#include "Arduino.h"
#include "mac.h"
uint8_t mac[6];

/// See http://forum.pjrc.com/threads/91-teensy-3-MAC-address
void read(uint8_t word, uint8_t *mac, uint8_t offset) {
  FTFL_FCCOB0 = 0x41;             // Selects the READONCE command
  FTFL_FCCOB1 = word;             // read the given word of read once area

  // launch command and wait until complete
  FTFL_FSTAT = FTFL_FSTAT_CCIF;
  while(!(FTFL_FSTAT & FTFL_FSTAT_CCIF));

  *(mac+offset) =   FTFL_FCCOB5;       // collect only the top three bytes,
  *(mac+offset+1) = FTFL_FCCOB6;       // in the right orientation (big endian).
  *(mac+offset+2) = FTFL_FCCOB7;       // Skip FTFL_FCCOB4 as it's always 0.
}

void read_mac() {
  read(0xe,mac,0);
  read(0xf,mac,3);
}

void print_mac()  {
  size_t count = 0;
  for(uint8_t i = 0; i < 6; ++i) {
    if (i!=0) count += Serial.print(":");
    count += Serial.print((*(mac+i) & 0xF0) >> 4, 16);
    count += Serial.print(*(mac+i) & 0x0F, 16);
  }
}