/**************************************************************************//**
* @brief
* Callback function called when the DMA finishes a transfer.
* @param channel
* The DMA channel that finished.
* @param primary
* Primary or Alternate DMA descriptor
* @param user
* User defined pointer (Not used in this example.)
*****************************************************************************/
void PingPongTransferCompleteRX(unsigned int channel, bool primary, void *user)
{
(void) channel; /* Unused parameter */
(void) user; /* Unused parameter */
// FillBufferFromSDcard((bool) wavHeader.channels, primary);
/* Stop DMA if bytecounter is equal to datasize or larger */
bool stop = false;
int8_t * buffer;
/* Set buffer pointer correct ram buffer */
if (primary)
{
buffer = ramBufferDacData0Stereo;
}
else /* Alternate */
{
buffer = ramBufferDacData1Stereo;
}
USB_Transmit((uint8_t *)buffer, 256);
rxPackets++;
/* Refresh the DMA control structure */
DMA_RefreshPingPong(1,
primary,
false,
NULL,
NULL,
(2 * BUFFERSIZE) - 1,
stop);
}
/***************************************************************************//**
* @brief
* Callback invoked from DMA interrupt handler when DMA transfer has filled
* an audio in buffer. (I.e. received from ADC.)
*******************************************************************************/
static void guitarDMAInCb(unsigned int channel, bool primary, void *user)
{
(void) user; /* Unused parameter */
uint16_t *inBuf;
inBuf = primary ? guitarAudioInBuffer1 : guitarAudioInBuffer2;
/* Copy the recieved samples unless we are currently processing */
if (!processingFFT)
{
/* Two channels, and each sample is 2 bytes */
memcpy(audioToFFTBuffer, inBuf, GUITAR_AUDIO_BUFFER_SAMPLES * 2 * 2);
dataReadyForFFT = true;
}
/* Refresh DMA for using this buffer. DMA ping-pong will */
/* halt if buffer not refreshed in time. */
DMA_RefreshPingPong(channel,
primary,
false,
NULL,
NULL,
(GUITAR_AUDIO_BUFFER_SAMPLES * 2) - 1,
false);
guitarMonInCount++;
}
/***************************************************************************//**
* @brief
* Callback invoked from DMA interrupt handler when DMA transfer has used
* an audio out buffer. (I.e. transferred to DAC.)
*******************************************************************************/
static void preampDMAOutCb(unsigned int channel, bool primary, void *user)
{
(void) user; /* Unused parameter */
/* Refresh DMA for using this buffer. DMA ping-pong will */
/* halt if buffer not refreshed in time. */
DMA_RefreshPingPong(channel,
primary,
false,
NULL,
NULL,
PREAMP_AUDIO_BUFFER_SIZE - 1,
false);
preampMonOutCount++;
}
/**************************************************************************//**
* @brief
* Callback function called when the DMA finishes a transfer.
* @param channel
* The DMA channel that finished.
* @param primary
* Primary or Alternate DMA descriptor
* @param user
* User defined pointer (Not used in this example.)
*****************************************************************************/
void PingPongTransferCompleteTX(unsigned int channel, bool primary, void *user)
{
(void) channel; /* Unused parameter */
(void) user; /* Unused parameter */
/* Stop DMA if bytecounter is equal to datasize or larger */
bool stop = false;
/* Refresh the DMA control structure */
DMA_RefreshPingPong(0,
primary,
false,
NULL,
NULL,
(2 * BUFFERSIZE) - 1,
stop);
}
/***************************************************************************//**
* @brief
* Callback function for UDMA ping-pong transfers.
******************************************************************************/
static void DmaPingPongCallback( unsigned int channel, bool primary, void *user )
{
bool stop = true;
ChTable_t *ch = &chTable[ channel ];
(void)user;
if ( ch->callback != NULL )
{
ch->callbackCount++;
stop = !ch->callback( channel, ch->callbackCount, ch->userParam );
}
DMA_RefreshPingPong( 0,
primary,
false,
NULL,
NULL,
ch->length - 1,
stop );
}
/***************************************************************************//**
* @brief
* Callback invoked from DMA interrupt handler when DMA transfer has filled
* an audio in buffer. (I.e. received from ADC.)
*******************************************************************************/
static void preampDMAInCb(unsigned int channel, bool primary, void *user)
{
(void) user; /* Unused parameter */
/* Refresh DMA for using this buffer. DMA ping-pong will */
/* halt if buffer not refreshed in time. */
DMA_RefreshPingPong(channel,
primary,
false,
NULL,
NULL,
(PREAMP_AUDIO_BUFFER_SIZE * 2) - 1,
false);
preampMonInCount++;
/* Indicate buffer to be processed next */
preampProcessPrimary = primary;
/* Trigger lower priority interrupt which will process data */
SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
}
static void dacCb(unsigned int channel, bool primary, void *user)
{
(void) user;
DMA_RefreshPingPong(channel, primary, false, NULL, NULL, N-1, false);
}
void transferOutRightComplete(unsigned int channel, bool primary, void *user)
{
(void) user;
DMA_RefreshPingPong(channel, primary, false, NULL, NULL, N-1, false);
}
