void interrupt() {
#ifdef USB_SERIAL_DEBUG
serial_handle_tx_isr();
serial_handle_rx_isr();
#endif
usb_handle_isr();
}
void serial_putc(uns8 c)
{
uns8 tx_next;
bit my_store_gie;
#ifdef SERIAL_IDE_DEBUG
return;
#endif
if ((tx_end == tx_start) && // Nothing in the fifo
test_bit(pir1, TXIF)) { // And txreg is empty
txreg = c; // then no need for fifo, just send straight out
} else { // else put it in the fifo
tx_next = tx_end + 1; // get next buffer position
if (tx_next == SERIAL_TX_BUFFER_SIZE) { // if we're at the end
tx_next = 0; // wrap to the beginning
}
#ifdef SERIAL_DISCARD_ON_TX_FULL_DURING_INT
if ((!intcon.GIE) && (tx_next == tx_start)) {
return;
}
#endif
while (tx_next == tx_start) { // wait for clearing
// Note, if buffer is full
// this will wait for ever
// if interrupts are disabled!
#ifndef SERIAL_DISCARD_ON_TX_FULL_DURING_INT
if (!intcon.GIE) { // we're in an interrupt
serial_handle_tx_isr(); // so handle it ourselves
}
#endif
}
my_store_gie = intcon.GIE; // store interrupt state
kill_interrupts(); // turn off global interrupts
tx_buffer[tx_end] = c; // put it in
tx_end = tx_next; // move pointer along
set_bit(pie1, TXIE); // turn on interrupt for transmitting
intcon.GIE = my_store_gie; // restore interrupt state
} // -- else put it in the fifo
}
// Interrupt routine - - - - - - - - - -
void interrupt() {
serial_handle_tx_isr();
serial_handle_rx_isr();
}
