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#include <Arduino.h>
#include <SM130.h>
#include <Wire.h>
#include "config.h"
/** Global variable that holds RFID reader object. */
SM130 rfid;
/**
* Init NFC subsystem
*/
void rf_init(void) {
Wire.begin();
rfid.address = 0x30;
rfid.reset();
#ifdef DEBUG
Serial.print("SM130 firmware version: ");
Serial.println(rfid.getFirmwareVersion());
#endif //DEBUG
}
/**
* Resets the NFC controller
*/
void rf_reset() {
rfid.reset();
}
/**
* Sends seek command to rfid reader.
*/
void rf_seek() {
rfid.seekTag();
}
/**
* Handles communication with rfid reader.
* @param p_rfid Pointer to space where mifare id will be written.
* @return Returns true when authorized user rfid was rd.
*/
boolean rf_comm(unsigned long * p_rfid) {
static unsigned long last_millis_seek = 0;
static unsigned long last_millis_reset = 0;
unsigned long new_millis = millis();
(*p_rfid) = 0;
if (new_millis < last_millis_seek) {
last_millis_seek = new_millis;
} else if ((new_millis - last_millis_seek) > RF_PERIOD_SEEK_MS) {
rf_seek();
last_millis_seek = new_millis;
}
if (new_millis < last_millis_reset) {
last_millis_reset = new_millis;
} else if ((new_millis - last_millis_reset) > RF_PERIOD_RESET_MS) {
rf_reset();
last_millis_reset = new_millis;
}
if (rfid.available()){
//Message received
uint8_t *rf_bytes = rfid.getTagNumber();
#ifdef DEBUG
Serial.print("RFID Tag: ");
for (int i = 0; i < 8; i++) {
Serial.print(rf_bytes[i], HEX);
Serial.print(",");
}
Serial.println();
#endif //DEBUG
unsigned long data=(long(rf_bytes[3])<<24)|(long(rf_bytes[2])<<16)|(long(rf_bytes[1])<<8)|(long(rf_bytes[0]));
(*p_rfid) = data;
return true;
}
return false;
}
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