For an IOT project that I'm currently working on, I'm trying to use and rfid sensor with a particle photon in order to read rfid tags. In my doe, I get an error from the compiler that reads:
SeeedRFID.h:88:34: error: ISO C++ forbids declaration of 'init' with no type [-fpermissive]
init(int rxPin, int txPin);
SeeedRFID.cpp:55:37: error: ISO C++ forbids declaration of 'init' with no type [-fpermissive]
SeeedRFID::init(int rxPin, int txPin)
SeeedRFID.cpp: In member function 'int SeeedRFID::init(int, int)':
SeeedRFID.cpp:70:1: warning: no return statement in function returning non-void [-Wreturn-type]
}
To be more specific, I'm using the c++/java particle build ide to develop this code for my particle photon chip. and this combines 3 files (.ino, .cpp, and .h). I denoted what lines of code are cause ing an error with the comment "//This is where I seem to be getting part of the error" My files look like this:
RFID_UART.ino
#if defined (SPARK)
#include "SeeedRFID.h"
#else
#include <SoftwareSerial.h>
#include <SeeedRFID.h>
#endif
#define RFID_RX_PIN RX
#define RFID_TX_PIN TX
// #define DEBUGRFID
#define TEST
SeeedRFID RFID;
RFIDdata tag;
void setup() {
RFID.init(RFID_RX_PIN, RFID_TX_PIN); //This is where I seem to be getting part of the error
Serial1.begin(9600); //Done here to prevent SeeedRFID constructor system crash
//Serial is basically the same thing as System.out.println();
Serial.begin(57600);
Serial.println("Hello, double bk!"); //This is so I know that setup() works
}
void loop() {
if(RFID.isAvailable()){
tag = RFID.data();
Serial.print("RFID card number: ");
Serial.println(RFID.cardNumber());
#ifdef TEST
Serial.print("RFID raw data: ");
for(int i=0; i<tag.dataLen; i++){
Serial.print(tag.raw[i], HEX);
Serial.print('\t');
}
#endif
}
}
SeeedRFID.cpp
#include "SeeedRFID.h"
SeeedRFID::init(int rxPin, int txPin)//This is where I seem to be getting part of the error
{
#if (PLATFORM_ID == 0) || (PLATFORM_ID == 6) //Core or Photon (they're both the same platform essentially)
_rfidIO = &Serial1; // Select Serial1 or Serial2
#else
_rfidIO = new SoftwareSerial(rxPin, txPin);
_rfidIO->begin(9600);
#endif
// init RFID data
_data.dataLen = 0;
_data.chk = 0;
_data.valid = false;
_isAvailable = false;
_type = RFID_UART;
}
SeeedRFID::SeeedRFID() //Empty constructor
{
}
boolean SeeedRFID::checkBitValidationUART()
{
if( (5 == _data.dataLen) && (_data.raw[4] == _data.raw[0]^_data.raw[1]^_data.raw[2]^_data.raw[3]))
{
_data.valid = _isAvailable = true;
return true;
} else
{
_data.valid = _isAvailable = false;
return false;
}
}
boolean SeeedRFID::read()
{
_isAvailable = false;
if (_data.dataLen != 0)
{
_data.dataLen = 0;
}
while (_rfidIO->available())
{
_data.raw[_data.dataLen++] = _rfidIO->read();
#ifdef DEBUGRFID
Serial.println("SeeedRFID:read() function, and the RFID raw data: ");
for (int i = 0; i < _data.dataLen; ++i)
{
Serial.println();
Serial.print(_data.raw[i], HEX);
Serial.print('\t');
}
Serial.println();
#endif
delay(10);
}
return SeeedRFID::checkBitValidationUART();
}
boolean SeeedRFID::isAvailable()
{
switch(_type){
case RFID_UART:
return SeeedRFID::read();
break;
case RFID_WIEGAND:
return false;
break;
default:
return false;
break;
}
}
RFIDdata SeeedRFID::data()
{
if (_data.valid)
{
return _data;
}else{
// empty data
RFIDdata _tag;
return _tag;
}
}
unsigned long SeeedRFID::cardNumber()
{
// unsigned long myZero = 255;
unsigned long sum = 0;
if(0 != _data.raw[0]){
// _data.raw[0] = _data.raw[0] & myZero;
sum = sum + _data.raw[0];
sum = sum<<24;
}
// _data.raw[1] = _data.raw[1] & myZero;
sum = sum + _data.raw[1];
sum = sum<<16;
unsigned long sum2 = 0;
// _data.raw[2] = _data.raw[2] & myZero;
sum2 = sum2 + _data.raw[2];
sum2 = sum2 <<8;
// _data.raw[3] = _data.raw[3] & myZero;
sum2 = sum2 + _data.raw[3];
sum = sum + sum2;
#ifdef DEBUGRFID
Serial.print("cardNumber(HEX): ");
Serial.println(sum, HEX);
Serial.print("cardNumber: ");
Serial.println(sum);
#endif
return sum;
}
SeeedRFID.h
#ifndef SeeedRFID_H
#define SeeedRFID_H
#include "application.h"
struct RFIDdata
{
int dataLen;
byte chk;
boolean valid;
unsigned char raw[5];
};
enum RFIDType
{
RFID_UART,
RFID_WIEGAND
};
class SeeedRFID
{
private:
#if (PLATFORM_ID == 0) || (PLATFORM_ID == 6) //Core or Photon
USARTSerial * _rfidIO; // software serial
#else
SoftwareSerial * _rfidIO; // software serial
#endif
RFIDdata _data;
boolean _isAvailable;
RFIDType _type;
boolean checkBitValidationUART();
boolean read();
public:
SeeedRFID(int rxPin, int txPin);
SeeedRFID(); // Empty constructor
~SeeedRFID();
init(int rxPin, int txPin);//This is where I seem to be getting part of the error
boolean isAvailable();
RFIDdata data();
unsigned long cardNumber();
};
#endif //__SeeedRFID_H__
I'm not quite sure if it's a deceleration issue that's happening, but if anyone can help my, that would be great. Thanks in advance!
Follow up:
After adding void as a valid function type in init, and adding an extra pair of parenthesis in my checkBitValidationUART() function, I get a new error that looks like this:
../../../build/target/user/platform-6/libuser.a(rfid_uart.o): In function `__static_initialization_and_destruction_0':
rfid_uart.cpp:17: undefined reference to `SeeedRFID::~SeeedRFID()'
collect2: error: ld returned 1 exit status
make: *** [78d90e0fa4198d16c036bc7b90f2e4ec4507eca98981faccb460440188a7.elf] Error 1
I don't know why this error comes up, If anyone can help me debug this, that would be great!
