/*---------------------------------------------------------------------------*
* Routine: ISerialGeneric_TimerCallbackTransmitEmpty
*---------------------------------------------------------------------------*
* Description:
* The transmission buffer is empty (or needs more characters). Pull
* a byte out of the waiting buffer and put into the serial hardware
* output by calling SerialDevice->OutputByte.
* Inputs:
* void *aCallbackWorkspace -- Pointer to T_RS485_Generic_Timer_Workspace
*---------------------------------------------------------------------------*/
static void ISerialGeneric_TimerCallbackTransmitEmpty(
void *aCallbackWorkspace,
TUInt32 aNumBytesAvailable)
{
T_RS485_Generic_Timer_Workspace *p =
(T_RS485_Generic_Timer_Workspace *)aCallbackWorkspace;
TUInt8 c;
PARAM_NOT_USED(aNumBytesAvailable);
// Only send one byte at a time because we have greater control
// over the timing (the LPC2478 takes 1 character minus 1 stop bit to process
// this many characters
// Output a byte to the buffer
if (_isr_UEZQueueReceive(p->iQueueSend, &c) == UEZ_ERROR_NONE) {
// Got data, send it
(*p->iSerial)->OutputByte((T_halWorkspace *)p->iSerial, c);
} else {
// No more data to send
p->iTxBusy = EFalse;
// Set the time it takes until we get a match
(*p->iTimer)->SetMatchRegister(p->iTimer, 0,
p->iReleaseTimeCPUCycles, ETrue, EFalse, EFalse);
// Reset and start the counter
(*p->iTimer)->Reset(p->iTimer);
(*p->iTimer)->Enable(p->iTimer);
}
}
/*---------------------------------------------------------------------------*
* Routine: ISerialGenericHalfDuplexCallbackTransmitEmpty
*---------------------------------------------------------------------------*
* Description:
* The transmission buffer is empty (or needs more characters). Pull
* a byte out of the waiting buffer and put into the serial hardware
* output by calling SerialDevice->OutputByte.
* Inputs:
* void *aCallbackWorkspace -- Pointer to T_Serial_GenericHalfDuplex_Workspace
*---------------------------------------------------------------------------*/
void ISerialGenericHalfDuplexCallbackTransmitEmpty(
void *aCallbackWorkspace,
TUInt32 aNumBytesAvailable)
{
T_Serial_GenericHalfDuplex_Workspace *p = (T_Serial_GenericHalfDuplex_Workspace *)aCallbackWorkspace;
TUInt8 c;
while (aNumBytesAvailable--) {
// Output a byte to the buffer
if (_isr_UEZQueueReceive(p->iQueueSend, &c) == UEZ_ERROR_NONE) {
// Got data, send it
(*p->iSerial)->OutputByte((T_halWorkspace *)p->iSerial, c);
} else {
// No more data to send
p->iTxBusy = EFalse;
// Start a countdown until we release
_isr_UEZSemaphoreRelease(p->iDESem);
_isr_UEZSemaphoreRelease(p->iSemEmpty);
break;
}
}
}
