void Control()
{
static uchar i=0;
i++;
if(i>10)
{
i=0;
UartPutByte('T');
UartPutByte('e');
UartPutByte('m');
UartPutByte('p');
UartPutByte(':');
UartPutByte(temp_dat/10+'0');
UartPutByte(temp_dat%10+'0');
UartPutByte('.');
UartPutByte(temp_dot+'0');
UartPutByte('\n');
}
if(beep_flag>0)
{
if(i<5)
BEEP=0;
else
BEEP=1;
}
else
BEEP=1;
}
void
Type2ReadTwoBlocks(u08_t rd2b)
{
u08_t i = 0, command[4];
buf[0] = 0x8F; // reset FIFO
buf[1] = 0x91; // send with CRC
buf[2] = 0x3D; // write continuous from register
buf[3] = 0x00; // value for register 1D
buf[4] = 0x20; // register 1E (# of bytes to be transmitted)
buf[5] = 0x31; // RD2B command
//buf[6+30] = rd2b; // addressed block
buf[200] = 80; // tell apart from Ack/Nack
rx_error_flag = 0x00;
command[0] = SPECIAL_FUNCTION;
command[1] = SPECIAL_FUNCTION;
Trf797xReadSingle(&command[1], 1);
command[1] |= BIT2; // enable 4-bit receive
McuCounterSet(); // TimerA set
COUNT_VALUE = COUNT_1ms * 5; // 5ms
IRQ_CLR; // PORT2 interrupt flag clear
IRQ_ON;
Trf797xReset(); // FIFO has to be reset before recieving the next response
Trf797xRawWrite(&buf[0], 7); // set Special Function Register
i_reg = 0x01;
START_COUNTER; // start timer up mode
irq_flag = 0x00;
while(irq_flag == 0x00) // wait for end of TX interrupt
{
}
Trf797xWriteSingle(command, 2); // enable 4-bit receive
rxtx_state = 1; // the response will be stored in buf[1] upwards
McuCounterSet(); // TimerA set
COUNT_VALUE = COUNT_1ms * 10;
START_COUNTER; // start timer up mode
i_reg = 0x01;
while(i_reg == 0x01) // wait for interrupt
{
}
if(rx_error_flag == 0x02)
{
i_reg = 0x02;
}
if(i_reg == 0xFF) // recieved response
{
UartPutChar('[');
for(i = 1; i < rxtx_state; i++)
{
UartPutByte(buf[i]);
}
UartPutChar(']');
}
else if(i_reg == 0x02)
{
if(buf[200] < 0x20) // not acknowledged
{
UartSendCString("[NACK]");
}
else // collision occured
{
UartPutChar('[');
UartPutChar('z');
UartPutChar(']');
}
}
else if(i_reg == 0x00) // no responce
{
UartPutChar('[');
UartPutChar(']');
}
else
{
}
command[0] = SPECIAL_FUNCTION;
command[1] = SPECIAL_FUNCTION;
Trf797xReadSingle(&command[1], 1);
command[1] &= ~BIT2;
Trf797xWriteSingle(command, 2); // disable 4-bit receive
}
void
iso14443bAnticollision(u08_t command, u08_t slots)
{
u08_t i = 0, collision = 0x00, j, found = 0;
u32_t k = 0;
#ifdef ENABLE_HOST
//u08_t rssi[2];
#endif
rx_error_flag = 0x00;
buf[0] = 0x8F;
buf[1] = 0x91;
buf[2] = 0x3D;
buf[3] = 0x00;
buf[4] = 0x30;
buf[5] = 0x05;
buf[6] = 0x00;
if(slots == 0x04)
{
Trf797xEnableSlotCounter();
}
buf[7] = slots;
if(command == 0xB1)
{
buf[7] |= 0x08; // WUPB command else REQB command
}
i_reg = 0x01;
Trf797xRawWrite(&buf[0], 8);
IRQ_CLR; // PORT2 interrupt flag clear
IRQ_ON;
j = 0;
while((i_reg == 0x01) && (j < 2))
{
j++;
McuCounterSet(); // TimerA set
COUNT_VALUE = COUNT_1ms * 2; // 2ms
START_COUNTER;
irq_flag = 0x00;
while(irq_flag == 0x00)
{
}
} // wait for end of TX
i_reg = 0x01;
McuCounterSet(); // TimerA set
COUNT_VALUE = COUNT_1ms * 2; // 2ms
START_COUNTER;
for(i = 1; i < 17; i++)
{
rxtx_state = 1; // the response will be stored in buf[1] upwards
while(i_reg == 0x01) // wait for RX complete
{
k++;
if(k == 0xFFF0)
{
i_reg = 0x00;
rx_error_flag = 0x00;
break;
}
}
if(rx_error_flag == 0x02)
{
i_reg = rx_error_flag;
}
if(i_reg == 0xFF) // recieved SID in buffer
{
if(stand_alone_flag == 1)
{
found = 1;
}
else
{
#ifdef ENABLE_HOST
UartPutChar('[');
for(j = 1; j < rxtx_state; j++)
{
UartPutByte(buf[j]);
}
UartPutChar(']');
//UartPutChar('(');
//UartPutByte(rssi[0]);
//UartPutChar(')');
UartPutCrlf();
#endif
}
}
else if(i_reg == 0x02) // collision occured
{
if(stand_alone_flag == 0)
{
#ifdef ENABLE_HOST
UartPutChar('[');
UartPutChar('z');
UartPutChar(']');
#endif
}
collision = 0x01;
}
else if(i_reg == 0x00) // slot timeout
{
if(stand_alone_flag == 0)
{
#ifdef ENABLE_HOST
//UartPutChar('[');
//UartPutChar(']');
#endif
}
}
else
{
}
if((slots == 0x00) || (slots == 0x01) || (slots == 0x02) || ((slots == 0x04) && (i == 16)))
{
break;
}
iso14443bSlotMarkerCommand(i);
i_reg = 0x01;
if(stand_alone_flag == 0)
{
#ifdef ENABLE_HOST
//UartPutCrlf();
#endif
}
} // for
if(slots == 0x04)
{
Trf797xDisableSlotCounter();
}
IRQ_OFF;
if(remote_flag == 0)
{
if(found == 1)
{
LED_14443B_ON;
}
else
{
LED_14443B_OFF;
}
}
if(collision)
{
iso14443bAnticollision(0x20, 0x02); // Call this function for 16 timeslots
}
} // iso14443bAnticollision
