RFID INTERFACING WITH 8051 (HARDWARE AND SIMULATION)

• COMPILER -MIKRO C PRO
• SIMULATION -PROTEUS 8.1
• MICROCONTROLLER – AT89S51 
• CRYSTAL – 11.0592MHz(use this crystal to get baud rate of 9600)

HARDWARE


CIRCUIT

OUTPUT DATA ON PC APPLICATION (X-CTU)


SIMULATION
DOWNLOAD SIMULATION FILES



PROGRAM
//RX PIN 10  (P3_0)      //RFID(EM-18 MODULE)
//TX PIN 11 (P3_1)
char cardletter;
void card1(void);
void card2(void);
void card3(void);
void rfid(void);
void main() {
  uart1_init(9600);
  Delay_ms(100);                  // Wait for UART module to stabilize
    UART1_Write_Text(“HI”);
  while (1) 
  {   
  rfid();
    }
  }
void rfid(void)
{
  if (UART1_Data_Ready())
   {
cardletter = UART1_Read();
card1();
card2();
card3();
}                                                                   Z
}
 void card1(void)//card no.1000699A58BB(PRINTED NO.10539512)
{
if(cardletter==’6′)
{
while(!(UART1_Data_Ready()));
cardletter = UART1_Read();
if(cardletter==’C’)
{
  UART1_Write_Text(“card found 1”);UART1_Write(0XD);}
}
}
 void card2(void)//card no.180089205DEC (PRINTED NO.13708285)
{
if(cardletter==’B’)
{
while(!(UART1_Data_Ready()));
cardletter = UART1_Read();
if(cardletter==’D’)
{
  UART1_Write_Text(“card found 2”);UART1_Write(0XD);
  }
}
}
 void card3(void)//card no.1800893719BF (PRINTED NO.13714105)
{
if(cardletter==’9′)
{
while(!(UART1_Data_Ready()));
cardletter = UART1_Read();
if(cardletter==’B’)
{  UART1_Write_Text(“card found 3”);UART1_Write(0XD);}
}
}