__interrupt void USCI_A3_ISR(void)
{
switch(__even_in_range(UCA3IV,4))
{
case 0:break; // Vector 0 - no interrupt
case 2:break; // Vector 2 - RXIFG
case 4: // Vector 4 - TXIFG
if ( TxCount == 0 )
{
UCA3IFG = 0;
TxBusy = 0;
/* start the countdown to disable SMCLK */
DisableSmClkCounter = 0;
EnableRtcPrescaleInterruptUser(RTC_TIMER_USER_DEBUG_UART);
}
else
{
/* send a character */
UCA3TXBUF = TxBuffer[ReadIndex];
IncrementReadIndex();
TxCount--;
}
break;
default: break;
}
}
static void WriteTxBuffer(tString * const pBuf)
{
unsigned char i = 0;
unsigned int LocalCount = TxCount;
/* if there isn't enough room in the buffer then characters are lost */
while ( pBuf[i] != 0 && LocalCount < TX_BUFFER_SIZE )
{
TxBuffer[WriteIndex] = pBuf[i++];
IncrementWriteIndex();
LocalCount++;
}
/* keep a sticky bit for lost characters */
if ( pBuf[i] != 0 )
{
gAppStats.DebugUartOverflow = 1;
}
/*
* update the count (which can be decremented in the ISR
* and start sending characters if the UART is currently idle
*/
if ( i > 0 )
{
portENTER_CRITICAL();
TxCount += i;
#if 0
if ( TxCount > TX_BUFFER_SIZE )
{
while(1);
}
#endif
if ( TxBusy == 0 )
{
EnableSmClkUser(BT_DEBUG_UART_USER);
UCA3TXBUF = TxBuffer[ReadIndex];
IncrementReadIndex();
TxBusy = 1;
TxCount--;
}
portEXIT_CRITICAL();
}
}
/*****************************************************************************
Function:
void EventDequeue(t_event *p_event);
Summary:
Removes an event from the event queue.
Description:
Called by Universal Driver when it is going to report an event to the
application via a callback function.
Parameters:
p_event -- pointer to where event data is written
Returns:
Pointer to event object
Remarks:
None
*****************************************************************************/
void EventDequeue(t_event *p_event)
{
t_event *p_eventInQueue;
// event queue should never be empty
if (isEventQEmpty())
{
// ToDo: callback here?
for(;;);
}
// point to next event in event queue
p_eventInQueue = &g_eventQueue.event[g_eventQueue.readIndex];
// copy event info into callers structure
p_event->eventType = p_eventInQueue->eventType;
p_event->eventData = p_eventInQueue->eventData;
IncrementReadIndex();
}
