// configuration and LCD libraries
... ( LCD works properly )
...

// RFID MFRC522 pins
#define rf_ss   LATAbits.LA0
#define rf_sck  LATAbits.LA1
#define rf_mosi LATAbits.LA2
#define rf_rst  LATAbits.LA3
#define rf_miso PORTAbits.RA5 // input

// A custom function to send data to SPI bus
unsigned char SPI_WB( unsigned char d ) {
    __delay_us( 500 );
    unsigned char r = 0; // to get a MISO values
    for ( unsigned char i = 0; i < 8; i++ ) {
        rf_mosi = ( d >> i ) & 0x01;
        __delay_us( 100 );
        rf_sck = 1;
        __delay_us( 100 );
        r = ( ( rf_miso << i ) | r );
        __delay_us( 100 );
        rf_sck = 0;
        __delay_us( 1000 );
    }
    __delay_us( 100 );
    return r;
}

// A custom function to write data to register
void SPI_WR( unsigned char a, unsigned char v ) {
  rf_ss = 0;
  SPI_WB( ( a << 1 ) & 0x7E ); // Address format: 0XXXXXX0
  SPI_WB( v );
  rf_ss = 1;
}

unsigned char SPI_RR( unsigned char a ) {
  rf_ss = 0;
  SPI_WB( ( ( a << 1 ) & 0x7E ) | 0x80 );
  rf_ss = 1;
  return SPI_WB( 0x00 );
}

#define MFRC522_CR 0x01 // Command register
#define MFRC522_SR 0x0F // MFRC522 Soft Reset command
#define MFRC522_V 0x37 // MFRC522 Version register


void main( ) {
  rf_ss = 1;
  __delay_us( 1000 );
  SPI_WR( CommandReg, MFRC522_SR ); // A result of logic picture is below
  unsigned char str;
  sprintf( str, "Version: 0x%x", SPI_RR( MFRC522_V ) ); LCD_W( str ); // Unfortunately returns "Version: 0x0"
  while( 1 ) { }
}
...