#ifndef _RFD01_H_
#define _RFD01_H_
// *************************************************************
#define SET_RX_IN() cbi(DDRA,1)
#define RX() bit_is_set(PINA,1)
// *************************************************************
void rfid_rx();
void rfid_vuart_refresh();
void rfid_init();
volatile char vser_rxchar,vser_recived;
volatile char rfid_new;
volatile char rfid_buffer[11];
// *************************************************************
void rfid_init()
{
SET_RX_IN();
vser_recived = 0;
}
// *************************************************************
void rfid_vuart_refresh()
{
char r = RX();
static char rxstate = 0 , rxbyte;
if( rxstate == 0 ) // wait to start bit
{
if( r == 0 )
{
rxstate = 1;
rxbyte = 0;
}
}
else if( rxstate == 9 ) // stop bit
{
if( r )
{
rxstate = 0;
vser_rxchar = rxbyte;
vser_recived = 1;
rfid_rx();
}
else
rxstate = 0; // error on stop bit
}
else
{
rxbyte = rxbyte >> 1;
if( r )
rxbyte|=0x80;
rxstate++;
}
}
// *************************************************************
// an event on recive any charachter on rfid usart
void rfid_rx()
{
static char i = 0;
vser_recived = 0;
if(vser_rxchar == 0x03)
{
if( i == 13 )
{
rfid_new = 1;
rfid_buffer[10] = 0; //null end str
}
i = 0;
return;
}
else if(vser_rxchar == 0x02)
{
if( i == 0 )
i = 1;
return;
}
else if( i == 0 )
{
return;
}
else if( i <=10 )
{
rfid_buffer[i-1] = vser_rxchar;
}
i++;
}
// *************************************************************
#endif
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