void
BSP_uart_termios_isr_com2()
{
unsigned char buf[40];
int off, ret, vect;
off = 0;
for(;;)
{
vect = uread(BSP_UART_COM2, IIR) & 0xf;
switch(vect)
{
case NO_MORE_INTR :
/* No more interrupts */
if(off != 0)
{
/* Update rx buffer */
rtems_termios_enqueue_raw_characters(termios_ttyp_com2,
(char *)buf,
off);
}
return;
case TRANSMITTER_HODING_REGISTER_EMPTY :
/*
* TX holding empty: we have to disable these interrupts
* if there is nothing more to send.
*/
ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1);
/* If nothing else to send disable interrupts */
if(ret == 0)
{
uwrite(BSP_UART_COM2, IER,
(RECEIVE_ENABLE |
RECEIVER_LINE_ST_ENABLE
)
);
termios_tx_active_com2 = 0;
}
break;
case RECEIVER_DATA_AVAIL :
case CHARACTER_TIMEOUT_INDICATION:
/* RX data ready */
assert(off < sizeof(buf));
buf[off++] = uread(BSP_UART_COM2, RBR);
break;
case RECEIVER_ERROR:
/* RX error: eat character */
uartError(BSP_UART_COM2);
break;
default:
/* Should not happen */
assert(0);
return;
}
}
}
void
BSP_uart_termios_isr_com2(void *ignored)
{
unsigned char buf[40];
unsigned char val;
int off, ret, vect;
off = 0;
for(;;)
{
vect = uread(BSP_UART_COM2, IIR) & 0xf;
switch(vect)
{
case MODEM_STATUS :
val = uread(BSP_UART_COM2, MSR);
if(uart_data[BSP_UART_COM2].hwFlow)
{
if(val & CTS)
{
/* CTS high */
termios_stopped_com2 = 0;
if(termios_tx_hold_valid_com2)
{
termios_tx_hold_valid_com2 = 0;
BSP_uart_termios_write_com2(0, &termios_tx_hold_com2,
1);
}
}
else
{
/* CTS low */
termios_stopped_com2 = 1;
}
}
break;
case NO_MORE_INTR :
/* No more interrupts */
if(off != 0)
{
/* Update rx buffer */
if( driver_input_handler_com2 )
{
driver_input_handler_com2( termios_ttyp_com2, (char *)buf, off );
}
else
{
rtems_termios_enqueue_raw_characters(termios_ttyp_com2, (char *)buf, off);
}
}
return;
case TRANSMITTER_HODING_REGISTER_EMPTY :
/*
* TX holding empty: we have to disable these interrupts
* if there is nothing more to send.
*/
/* If nothing else to send disable interrupts */
ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1);
if ( ret == 0 ) {
termios_tx_active_com2 = 0;
uart_data[BSP_UART_COM2].ier &= ~(TRANSMIT_ENABLE);
uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier);
}
break;
case RECEIVER_DATA_AVAIL :
case CHARACTER_TIMEOUT_INDICATION:
if ( uart_data[BSP_UART_COM2].ioMode == TERMIOS_TASK_DRIVEN ) {
/* ensure interrupts are enabled */
if ( uart_data[BSP_UART_COM2].ier & RECEIVE_ENABLE ) {
/* disable interrupts and notify termios */
uart_data[BSP_UART_COM2].ier &= ~(RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE);
uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier);
rtems_termios_rxirq_occured(termios_ttyp_com2);
}
}
else {
/* RX data ready */
assert(off < sizeof(buf));
buf[off++] = uread(BSP_UART_COM2, RBR);
}
break;
case RECEIVER_ERROR:
/* RX error: eat character */
uartError(BSP_UART_COM2);
break;
default:
/* Should not happen */
assert(0);
return;
}
}
}
