static void InitDMA(void) {
InitTimer(); /* timer setup */
/* setup address modulo: we are not using it as we stream out the data once and then latch it */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* circular buffer */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* circular buffer */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* circular buffer */
/* the 'set all bits' and 'clear all bits' DMA events will use a single value, so no address increment.
* But for the data we will increment the source address counter
*/
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_DISABLE); /* source address incremented by transfer size */
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, PDD_ENABLE); /* source address incremented by transfer size */
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, PDD_DISABLE); /* source address incremented by transfer size */
/* we transfer one byte every time */
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_8_BIT); /* Transfer size from source is 8bit */
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, DMA_PDD_8_BIT); /* Transfer size from source is 8bit */
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, DMA_PDD_8_BIT); /* Transfer size from source is 8bit */
/* set up destination address:
* PSOR (Port Set Output Register) will use 0xff to set the bits
* PDOR (Port Data Output Register) will use the data
* PDCR (Port Data Clear Register) will use 0xff to clear the bits
*/
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&GPIOC_PSOR); /* set destination address: address of PTC Output register */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, (uint32_t)&GPIOC_PDOR); /* set destination address: address of PTC Output register */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, (uint32_t)&GPIOC_PCOR); /* set destination address: address of PTC Output register */
/* no destination address buffer module: we will stream data only once */
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
/* no destination address increments needed */
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_DISABLE); /* no auto-increment for destination address */
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, PDD_DISABLE); /* no auto-increment for destination address */
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, PDD_DISABLE); /* no auto-increment for destination address */
/* we are transferring 1 byte of data */
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_8_BIT); /* Transfer to destination size is 16bit */
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, DMA_PDD_8_BIT); /* Transfer to destination size is 16bit */
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, DMA_PDD_8_BIT); /* Transfer to destination size is 16bit */
/* at the and of the DMA sequence, disable DMA */
DMA_PDD_EnableRequestAutoDisable(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* disable DMA request at the end of the sequence */
DMA_PDD_EnableRequestAutoDisable(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, PDD_ENABLE); /* disable DMA request at the end of the sequence */
DMA_PDD_EnableRequestAutoDisable(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, PDD_ENABLE); /* disable DMA request at the end of the sequence */
}
static void InitDMA(void) {
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&transmitBuf[0]); /* set source address */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* source address will be incremented by transfer size */
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_16_BIT); /* Transfer size from source is 16bit */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&TPM0_C1V); /* set destination address */
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_DISABLE); /* no auto-increment for destination address */
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_16_BIT); /* Transfer to destination size is 16bit */
DMA_PDD_SetByteCount(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, NEO_DMA_NOF_BYTES); /* set number of bytes to transfer */
DMA_PDD_EnableTransferCompleteInterrupt(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* request interrupt at the end of the DMA transfer to set new byte count */
DMA_PDD_EnableRequestAutoDisable(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* disable DMA request at the end of the sequence */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* enable request from peripheral */
}
/* DMA Functions */
static void InitDMA(void) {
/* enable DMA MUX0: */
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 0, PDD_ENABLE); /* enable DMA MUX0 */
/* PIT triggering for DMA0: */
DMAMUX_PDD_EnableTrigger(DMAMUX0_BASE_PTR, 0, PDD_DISABLE); /* disable PIT Trigger */
/* use TPM0 overflow for DMA0 request: */
DMAMUX_PDD_SetChannelSource(DMAMUX0_BASE_PTR, 0, 25); /* KL25Z reference manual, 3.4.8.1, p64: source number 25 TPM0 CH1 DMA source */
/* DMA channel 0 source configuration: */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&GPIOC_PDIR); /* set source address */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_DISABLE); /* source address will be incremented by transfer size */
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_8_BIT); /* Transfer size from source */
/* DMA channel 0 destination configuration: */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&sampleBuffer[0]); /* set destination address */
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_CIRCULAR_BUFFER_DISABLED); /* no circular buffer */
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* auto-increment for destination address */
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, DMA_PDD_8_BIT); /* Transfer to destination size */
/* DMA channel 0 transfer configuration: */
DMA_PDD_EnableTransferCompleteInterrupt(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* request interrupt at the end of the DMA transfer */
(void)DMA_PDD_GetRequestAutoDisableEnabled(DMA_BASE_PTR, DMA_PDD_CHANNEL_0); /* disable DMA request at the end of the sequence */
}
/* ===================================================================*/
LDD_TError DMA1_EnableChannel(LDD_TDeviceData *DeviceDataPtr, LDD_DMA_TTransferDescriptor *DescriptorPtr)
{
LDD_DMA_TChannelNumber ChannelNumber;
DMA1_TDescriptorRecord *DescriptorRecordPtr;
/* Check channel allocation for the transfer descriptor and eventually store pointer to associated descriptor record. */
if (!GetRecord(DeviceDataPtr, DescriptorPtr, &DescriptorRecordPtr)) {
return ERR_NOTAVAIL; /* No channel allocated for the transfer. */
}
/* Transfer descriptor consistency test - this test can be disabled by setting the "Ignore range checking"
property to the "yes" value in the "Configuration inspector" */
if (!VerifyDescriptor(DescriptorPtr)) {
return ERR_PARAM_DATA;
}
ChannelNumber = DescriptorRecordPtr->ChannelNumber; /* Save local auxiliary channel number. */
if (!DescriptorRecordPtr->Initialized) { /* Is channel already initialized? */
/* If channel is not initialized yet, initialize and enable it */
DMA_PDD_WriteControlReg(DMA_BASE_PTR, ChannelNumber, 0U); /* Clear control register. Disable requests. */
DMA_PDD_ClearDoneFlag(DMA_BASE_PTR, ChannelNumber); /* Clear DMA transfer done status flag. */
/* Source address */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->SourceAddress);
/* Source address increment */
if (DescriptorPtr->SourceAddressIncrement) {
DMA_PDD_EnableSourceAddressIncrement(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
/* Destination address */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->DestinationAddress);
/* Destination address increment */
if (DescriptorPtr->DestinationAddressIncrement) {
DMA_PDD_EnableDestinationAddressIncrement(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
/* Transfer attributes: source transfer size, destination transfer size, source modulo, destination modulo */
DMA_PDD_SetSourceAddressModulo(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->SourceModuloSize);
DMA_PDD_SetSourceDataTransferSize(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->SourceTransferSize);
DMA_PDD_SetDestinationAddressModulo(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->DestinationModuloSize);
DMA_PDD_SetDestinationDataTransferSize(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->DestinationTransferSize);
/* Transfer mode */
if (DescriptorPtr->TransferMode == LDD_DMA_CYCLE_STEAL_TRANSFERS) {
DMA_PDD_EnableCycleSteal(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE); /* Enable cycle-steal mode. */
}
/* Byte count */
DMA_PDD_SetByteCount(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->ByteCount);
/* Auto-align mode settings. */
if (DescriptorPtr->AutoAlign) {
DMA_PDD_EnableAutoAlign(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
/* Asynchronous requests settings. */
if (DescriptorPtr->AsynchronousRequests) {
DMA_PDD_EnableAsynchronousRequests(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
/* Channel linking settings. */
switch (DescriptorPtr->ChannelLinkingMode) {
case LDD_DMA_LINKING_DISABLED:
/* Initialization not needed. */
break;
case LDD_DMA_CYCLE_STEAL_AND_TRANSFER_COMPLETE_LINKING:
DMA_PDD_SetChannelLinkingMode(DMA_BASE_PTR, ChannelNumber, DMA_PDD_CYCLE_STEAL_AND_TRANSFER_COMPLETE_LINKING); /* Set channel linking mode. */
DMA_PDD_SetLinkChannel1(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->InnerLoopLinkedChannel); /* Set channel linked after each particular read-write operation. */
DMA_PDD_SetLinkChannel2(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->OuterLoopLinkedChannel); /* Set channel linked after transfer byte count reaches zero. */
break;
case LDD_DMA_CYCLE_STEAL_LINKING:
DMA_PDD_SetChannelLinkingMode(DMA_BASE_PTR, ChannelNumber, DMA_PDD_CYCLE_STEAL_LINKING); /* Set channel linking mode. */
DMA_PDD_SetLinkChannel1(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->InnerLoopLinkedChannel); /* Set channel linked after each particular read-write operation. */
break;
case LDD_DMA_TRANSFER_COMPLETE_LINKING:
DMA_PDD_SetChannelLinkingMode(DMA_BASE_PTR, ChannelNumber, DMA_PDD_TRANSFER_COMPLETE_LINKING); /* Set channel linking mode. */
DMA_PDD_SetLinkChannel1(DMA_BASE_PTR, ChannelNumber, DescriptorPtr->OuterLoopLinkedChannel); /* Set channel linked after transfer byte count reaches zero. */
break;
}
if (DescriptorPtr->DisableAfterRequest) { /* Disable after request? */
DMA_PDD_EnableRequestAutoDisable(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
/* {Default RTOS Adapter} Critical section begin, general PE function is used */
EnterCritical();
DescriptorRecordPtr->Initialized = TRUE; /* Mark channel as initialized. */
DescriptorRecordPtr->Enabled = TRUE; /* Mark channel as enabled. */
DescriptorPtr->ChannelEnabled = TRUE; /* Mark channel as enabled in transfer descriptor. */
if (DescriptorPtr->Interrupts) { /* Interrupts enabled? */
DMA_PDD_EnableTransferCompleteInterrupt(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE);
if (DescriptorPtr->OnComplete) { /* Is transfer complete event enabled? */
((DMA1_TDeviceData *)DeviceDataPtr)->EventMask[ChannelNumber] |= LDD_DMA_ON_COMPLETE;
}
if (DescriptorPtr->OnError) { /* Is transfer error event enabled? */
((DMA1_TDeviceData *)DeviceDataPtr)->EventMask[ChannelNumber] |= LDD_DMA_ON_ERROR;
}
}
/* DMA channel HW requests source settings */
DMAMUX_PDD_WriteChannelConfigurationReg(DMAMUX0_BASE_PTR, ChannelNumber, 0U); /* Clear DMA MUX channel source register. */
if (DescriptorPtr->TriggerType != LDD_DMA_SW_TRIGGER) { /* SW trigger doesn't need MUX channel nor enabled hardware requests. */
DMAMUX_PDD_SetChannelSource(DMAMUX0_BASE_PTR, ChannelNumber, DescriptorPtr->TriggerSource); /* Set MUX channel source. */
if (DescriptorPtr->PeriodicTrigger) { /* Periodic trigger needed? */
DMAMUX_PDD_EnableTrigger(DMAMUX0_BASE_PTR, ChannelNumber, PDD_ENABLE);
}
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, ChannelNumber, PDD_ENABLE); /* Enable channel. */
}
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE); /* Enable HW requests. */
/* {Default RTOS Adapter} Critical section end, general PE function is used */
ExitCritical();
}
else {
/* If channel has already been initialized then enable it only */
/* {Default RTOS Adapter} Critical section begin, general PE function is used */
EnterCritical();
DescriptorRecordPtr->Enabled = TRUE; /* Mark channel as enabled. */
DescriptorPtr->ChannelEnabled = TRUE; /* Mark channel as enabled in transfer descriptor. */
if (DescriptorPtr->TriggerType != LDD_DMA_SW_TRIGGER) { /* SW trigger doesn't need enabled hardware requests. */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, ChannelNumber, PDD_ENABLE); /* Enable HW requests */
}
/* {Default RTOS Adapter} Critical section end, general PE function is used */
ExitCritical();
}
return ERR_OK;
}