//! enable and initialize the software uart
void uartswInit(void)
{
// initialize the buffers
uartswInitBuffers();
// initialize the ports
sbi(UARTSW_TX_DDR, UARTSW_TX_PIN);
cbi(UARTSW_RX_DDR, UARTSW_RX_PIN);
cbi(UARTSW_RX_PORT, UARTSW_RX_PIN);
// initialize baud rate
uartswSetBaudRate(9600);
// setup the transmitter
UartswTxBusy = FALSE;
// disable OC2 interrupt
cbi(TIMSK, OCIE2);
// attach TxBit service routine to OC2
timerAttach(TIMER2OUTCOMPARE_INT, uartswTxBitService);
// setup the receiver
UartswRxBusy = FALSE;
// disable OC0 interrupt
cbi(TIMSK, OCIE0);
// attach RxBit service routine to OC0
timerAttach(TIMER0OUTCOMPARE_INT, uartswRxBitService);
// INT2 trigger on rising edge
sbi(EICRA, ISC20);
// enable INT2 interrupt
sbi(EIMSK, INT2);
// turn on interrupts
sei();
}
//! enable and initialize the software uart
void uartswInit(void)
{
// initialize the buffers
uartswInitBuffers();
// initialize the ports
sbi(UARTSW_TX_DDR, UARTSW_TX_PIN);
cbi(UARTSW_RX_DDR, UARTSW_RX_PIN);
cbi(UARTSW_RX_PORT, UARTSW_RX_PIN);
// initialize baud rate
uartswSetBaudRate(9600);
// setup the transmitter
UartswTxBusy = FALSE;
// disable OC1A interrupt
cbi(TIMSK, OCIE1A);
// attach TxBit service routine to OC1A
timerAttach(TIMER1OUTCOMPAREA_INT, uartswTxBitService);
// setup the receiver
UartswRxBusy = FALSE;
// disable OC1B interrupt
cbi(TIMSK, OCIE1B);
// attach RxBit service routine to OC1B
timerAttach(TIMER1OUTCOMPAREB_INT, uartswRxBitService);
// attach RxBit service routine to ICP
timerAttach(TIMER1INPUTCAPTURE_INT, uartswRxBitService);
// trigger on rising edge
sbi(TCCR1B, ICES1);
// enable ICP interrupt
sbi(TIMSK, TICIE1);
// turn on interrupts
sei();
}
// functions
void radioInit(void)
{
// Initialize radio interface
// Since this radio creates a special serial interface,
// we initialize it here.
uartswInit();
// set baud rate of comm
uartswSetBaudRate(4800);
// initialize stxetx to use the software UART for sending data
stxetxInit(uartswSendByte);
}
// enable and initialize the software uart
void uartswInit(void)
{
// initialize the buffers
uartswInitBuffers();
// initialize the ports
sbi(UARTSW_TX_DDR, UARTSW_TX_PIN);
#ifdef UARTSW_INVERT
cbi(UARTSW_TX_PORT, UARTSW_TX_PIN);
#else
sbi(UARTSW_TX_PORT, UARTSW_TX_PIN);
#endif
cbi(UARTSW_RX_DDR, UARTSW_RX_PIN);
#ifdef UARTSW_INVERT
cbi(UARTSW_RX_PORT, UARTSW_RX_PIN);
#else
sbi(UARTSW_RX_PORT, UARTSW_RX_PIN);
#endif
// initialize baud rate
uartswSetBaudRate(9600);
// setup the transmitter
UartswTxBusy = FALSE;
// disable OC0A interrupt
cbi(TIMSK0, OCIE0A);
// attach TxBit service routine to OC0A
timerAttach(TIMER0OUTCOMPAREA_INT, uartswTxBitService);
// setup the receiver
UartswRxBusy = FALSE;
// disable 0C0B interrupt
cbi(TIMSK0, OCIE0B);
// attach RxBit service routine to OC0B
timerAttach(TIMER0OUTCOMPAREB_INT, uartswRxBitService);
// INT1 trigger on rising/falling edge
#ifdef UARTSW_INVERT
sbi(EICRA, ISC11);
sbi(EICRA, ISC10);
#else
sbi(EICRA, ISC11);
cbi(EICRA, ISC10);
#endif
// enable INT1 interrupt
sbi(EIMSK, INT1);
// turn on interrupts
sei();
}
//! enable and initialize the software uart
void uartswInit(void)
{
// initialize the buffers
uartswInitBuffers();
// initialize the ports
sbi(UARTSW_TX_DDR, UARTSW_TX_PIN);
#ifdef UARTSW_INVERT
cbi(UARTSW_TX_PORT, UARTSW_TX_PIN);
#else
sbi(UARTSW_TX_PORT, UARTSW_TX_PIN);
#endif
cbi(UARTSW_RX_DDR, UARTSW_RX_PIN);
cbi(UARTSW_RX_PORT, UARTSW_RX_PIN);
// initialize baud rate
uartswSetBaudRate(9600);
// setup the transmitter
UartswTxBusy = FALSE;
// disable OC2 interrupt
cbi(TIMSK0, OCIE2A);
// attach TxBit service routine to OC2
timerAttach(TIMER2OUTCOMPARE_INT, uartswTxBitService);
// setup the receiver
UartswRxBusy = FALSE;
// disable OC0 interrupt
cbi(TIMSK0, OCIE0A);
// attach RxBit service routine to OC0
timerAttach(OCIE0A, uartswRxBitService);
// INT2 trigger on rising/falling edge
#ifdef UARTSW_INVERT
sbi(MCUCR, ISC11); // rising edge
#else
cbi(MCUCR, ISC11); // falling edge
#endif
// enable INT2 interrupt
sbi(PCMSK0, PCINT2);
// turn on interrupts
sei();
}
int main(void)
{
// initialize our libraries
// initialize the UART (serial port)
uartswInit();
// set the baud rate of the UART for our debug/reporing output
uartswSetBaudRate(9600);
int serialChar;
//serialChar='0';
// should be transmit the first byte after power recycle.
// Otherwise, you should lost the first received byte.
// serialChar = '0';
// loop_until_bit_is_set(UCSR0A, UDRE0);
// UDR0 = (uint8_t)serialChar;
while (1) {
while ((serialChar = uartswGetByte()) == -1);
uartswSendByte((uint8_t)serialChar);
//_delay_ms(1000);
}
return 0;
}
