void usart1_isr(void)
{
unsigned char c;
/* Check if we were called because of RXNE. */
if (((USART_CR1(USART1) & USART_CR1_RXNEIE) != 0) &&
((USART_SR(USART1) & USART_SR_RXNE) != 0) &&
(!serial_rb_full(&srx))) {
c = serial_recv();
serial_rb_write(&srx, c);
}
/* Check if we were called because of TXE. */
else if (((USART_CR1(USART1) & USART_CR1_TXEIE) != 0) &&
((USART_SR(USART1) & USART_SR_TXE) != 0)) {
if(!serial_rb_empty(&stx)) {
serial_send(serial_rb_read(&stx));
}
else {
/* Disable the TXE interrupt, it's no longer needed. */
USART_CR1(USART1) &= ~USART_CR1_TXEIE;
}
}
else {
c = serial_recv();
}
}
interrupt(USCIAB0TX_VECTOR) USCI0TX_ISR(void)
{
if(!serial_rb_empty(&stx)) {
serial_send(serial_rb_read(&stx));
}
else {
IE2 &= ~UCA0TXIE;
}
}
unsigned char packet_byte_from_rcvq()
{
// wait until data arrived in buffer
while(serial_rb_empty(&srx)) {
__asm__("nop");
}
return serial_rb_read(&srx);
}
interrupt(USCIAB0TX_VECTOR) USCI0TX_ISR(void)
{
if(!serial_rb_empty(&stx)) {
serial_send(serial_rb_read(&stx));
}
else {
/* Disable the TX interrupt, it's no longer needed. */
IE2 &= ~UCA0TXIE;
}
}
int main(void)
{
int i;
clock_init();
gpio_init();
serial_init(9600);
serirq_init();
nrf_init();
nrf_configure_sb();
prx.size = PL_SIZE;
ptx.size = PL_SIZE;
while (1) {
ptx.data[0] = 0;
while(!serial_rb_empty(&srx) && ptx.data[0] < (PL_SIZE - 1)) {
ptx.data[ptx.data[0] + 1] = serial_rb_read(&srx);
ptx.data[0]++;
}
if(ptx.data[0] > 0) {
#ifdef MSP430
P1OUT |= RXTX_LED;
#else
gpio_set(GPIOC, TX_LED);
#endif
// switch to PTX for sending out data ...
nrf_set_mode_ptx();
nrf_send_blocking(&ptx);
nrf_set_mode_prx();
}
if(nrf_receive(&prx) != 0 && prx.data[0] > 0) {
if(!serial_rb_full(&stx)) {
for(i = 0; i < prx.data[0]; i++) serial_rb_write(&stx, prx.data[i + 1]);
#ifdef MSP430
P1OUT |= RXTX_LED;
IE2 |= UCA0TXIE;
#else
gpio_set(GPIOC, RX_LED);
USART_CR1(USART1) |= USART_CR1_TXEIE;
#endif
}
}
}
return 0;
}
