int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
if (CALBC1_8MHZ==0xFF) // If calibration constant erased
{
while(1); // do not load, trap CPU!!
}
DCOCTL = 0; // Select lowest DCOx and MODx settings
BCSCTL1 = CALBC1_8MHZ;
DCOCTL = CALDCO_8MHZ; // Load 8MHz constants
P2SEL |= 0x18; // Use P2.3/P2.4 for Timer_A
P2DIR |= 0x10; // P2.4 output
P3SEL |= 0x30; // Use P3.4/P3.5 for USCI_A0
UCA0CTL1 |= UCSWRST; // Set SW Reset
UCA0CTL1 = UCSSEL_2 + UCSWRST;
UCA0BR0 = 52; // 8MHz/52=153.8KHz
UCA0BR1 = 0;
UCA0MCTL = UCBRF_1 + UCOS16;
UCA0IRTCTL = UCIRTXPL2 + UCIRTXPL0 + UCIRTXCLK + UCIREN;
// Pulse length = 6 half clock cyc
// Enable BITCLK16, IrDA enc/dec
UCA0IRRCTL = UCIRRXPL; // Light = low pulse
UCA0CTL1 &= ~UCSWRST; // Resume operation
IE2 |= UCA0RXIE; // Enable RX int
TACCTL2 = OUT; // TXD Idle as Mark
TACTL = TASSEL_2 + MC_2; // SMCLK, continuous mode
RX_Ready(); // Ready Timer_A UART for RX
while (1)
{
__disable_interrupt(); // Disable interrupts
if (!Flags) // Any events pending?
__bis_SR_register(CPUOFF + GIE); // Enter LPM0 w/ interrupts
__enable_interrupt(); // Enable interrupts
if (Flags & FLAG_USCI) // USCI_A0 character received?
{
while (TACCTL2 & CCIE); // Yes, ensure Timer_A UART is ready
TX_Byte(RXDataIR); // Transmit using Timer_A UART
Flags &= ~FLAG_USCI; // Clear flag
IE2 |= UCA0RXIE; // Re-enable RX int
}
if (Flags & FLAG_UART) // Timer_A UART character received?
{
while (!(IFG2 & UCA0TXIFG)); // Ensure TX buffer is ready
UCA0TXBUF = RXData; // Move RX'd character to USCI_A0
Flags &= ~FLAG_UART; // Clear flag
RX_Ready(); // Ready Timer_A UART for RX
}
}
}
void main (void)
{
volatile unsigned int i;
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
BCSCTL1 |= XTS; // ACLK = LFXT1 = HF XTAL
do
{
IFG1 &= ~OFIFG; // Clear OSCFault flag
for (i = 0xFF; i > 0; i--); // Time for flag to set
}
while ( IFG1 & OFIFG ); // OSCFault flag still set?
BCSCTL2 |= SELM_3; // MCLK = LFXT1 (safe)
CCTL0 = OUT; // TXD Idle as Mark
TACTL = TASSEL_1 + MC_2; // ACLK, continuous mode
P1SEL = TXD; // P1.1/TA0 for TXD function
P1DIR = TXD; // TXD output on P1
P2SEL = RXD; // P2.2/TA0 as RXD input
// Mainloop
for (;;)
{
RX_Ready(); // UART ready to RX one Byte
_BIS_SR(CPUOFF + GIE); // Enter LPM0 w/ interr until char RXed
TX_Byte(); // TX Back RXed Byte Received
}
}
void main (void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
BCSCTL1 |= DIVA_3; // ACLK = LFXT1CLK/8
Set_DCO(); // Set DCO
CCTL0 = OUT; // TXD Idle as Mark
TACTL = TASSEL_2 + MC_2; // SMCLK, continuous mode
P1SEL = TXD; // P1.1/TA0 for TXD function
P1DIR = TXD; // TXD output on P1
P2SEL = RXD; // P2.2/TA0 as RXD input
// Mainloop
for (;;)
{
RX_Ready(); // UART ready to RX one Byte
_BIS_SR(LPM3_bits + GIE); // Enter LPM3 w/ interr until char RXed
TX_Byte(); // TX Back RXed Byte Received
}
}
