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 */
}
void DMA_Run(void) {
for(;;) {
//DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, 0, (uint32_t)&TPM0_C1V); /* set destination address */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, 0, (uint32_t)&dmaSrc[0]); /* set source address */
DMA_PDD_SetDestinationAddress(DMA_BASE_PTR, 0, (uint32_t)&dmaDst[0]); /* set destination address */
DMA_PDD_SetByteCount(DMA_BASE_PTR, 0, sizeof(dmaSrc));
DMACH1_EnableRequest(DMACH1_DeviceData); /* enable first transfer */
Cpu_EnableInt(); /* enable interrupts */
for(;;) {
//WAIT1_Waitms(200);
//DMA1_SetTransactionCount(DMACH1_DeviceData, 3);
#if SW_DMA_REQUEST
DMA1_SetRequestCount(DMACH1_DeviceData, 1); /* 1: 100->101->102->103->104 3: 100->103->106 */
DMACH1_StartTransfer(DMACH1_DeviceData);
#endif
//errors = DMACH1_GetError(DMACH1_DeviceData);
}
}
}
static uint8_t Transfer(uint32_t src) {
TMOUT1_CounterHandle handle;
bool isTimeout;
transferComplete = FALSE;
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, src); /* set source address */
DMA_PDD_SetByteCount(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, NEO_DMA_NOF_BYTES); /* set number of bytes to transfer */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* enable request from peripheral */
handle = TMOUT1_GetCounter(100/TMOUT1_TICK_PERIOD_MS);
isTimeout = FALSE;
while(!transferComplete) {
/* wait until transfer is complete */
if (TMOUT1_CounterExpired(handle)) {
isTimeout = TRUE;
break; /* leave loop */
}
}
TMOUT1_LeaveCounter(handle);
if (isTimeout) {
return ERR_BUSY;
}
return ERR_OK;
}
/* 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 */
}
static uint8_t Transfer(uint32_t dataAddress, size_t nofBytes) {
static const uint8_t OneValue = 0xFF; /* value to clear or set the port bits */
TMOUT1_CounterHandle handle;
bool isTimeout;
uint32_t done0, done1, done2;
/* clear any pending done flags for DMA channels */
DMA_PDD_ClearDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_0);
DMA_PDD_ClearDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_1);
DMA_PDD_ClearDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_2);
/* set DMA source addresses */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, (uint32_t)&OneValue); /* set source address */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, dataAddress); /* set source address */
DMA_PDD_SetSourceAddress(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, (uint32_t)&OneValue); /* set source address */
/* set byte count addresses */
DMA_PDD_SetByteCount(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, nofBytes); /* set number of bytes to transfer */
DMA_PDD_SetByteCount(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, nofBytes); /* set number of bytes to transfer */
DMA_PDD_SetByteCount(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, nofBytes); /* set number of bytes to transfer */
/* reset TPM counter */
TPM_PDD_InitializeCounter(TPM0_DEVICE); /* reset timer counter */
TPM_PDD_ClearChannelFlags(TPM0_DEVICE, 0x00);
TPM_PDD_ClearOverflowInterruptFlag(TPM0_DEVICE);
/* re-enable DMA Muxing: it will disabled at the end of the transfer */
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 0, PDD_ENABLE);
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 1, PDD_ENABLE);
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 2, PDD_ENABLE);
/* enable DMA peripheral requests */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, DMA_PDD_CHANNEL_2, PDD_ENABLE); /* enable request from peripheral */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, DMA_PDD_CHANNEL_1, PDD_ENABLE); /* enable request from peripheral */
DMA_PDD_EnablePeripheralRequest(DMA_BASE_PTR, DMA_PDD_CHANNEL_0, PDD_ENABLE); /* enable request from peripheral */
/* clear timer flags and status so it starts from a clean starting point */
TPM_PDD_ClearChannelFlags(TPM0_DEVICE, 0x00);
TPM_PDD_ClearOverflowInterruptFlag(TPM0_DEVICE);
/* enable TPM DMA */
TPM_PDD_WriteStatusControlReg(TPM0_DEVICE,TPM_PDD_ReadStatusControlReg(TPM0_DEVICE)|TPM_SC_DMA_MASK);
TPM_PDD_EnableChannelDma(TPM0_DEVICE, 1);
TPM_PDD_EnableChannelDma(TPM0_DEVICE, 0);
/* start the TPM timer */
StartTimer();
isTimeout = FALSE;
handle = TMOUT1_GetCounter(100/TMOUT1_TICK_PERIOD_MS);
for(;;) {
/* wait until transfer is complete */
if (TMOUT1_CounterExpired(handle)) {
isTimeout = TRUE;
break; /* leave loop */
}
done0 = DMA_PDD_GetDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_0);
done1 = DMA_PDD_GetDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_1);
done2 = DMA_PDD_GetDoneFlag(DMA_BASE_PTR, DMA_PDD_CHANNEL_2);
if (done0 && done1 && done2) {
break; /* done! */
}
WAIT1_WaitOSms(1); /* give back some time */
}
TMOUT1_LeaveCounter(handle);
WAIT1_Waitus(50); /* latch, low for at least 50 us (40x1.25us) */
/* disable DMA-Muxing: necessary, otherwise DMA events on TPM0 channel 0 might be still latched.
* Will enable muxing for next transfer */
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 0, PDD_DISABLE);
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 1, PDD_DISABLE);
DMAMUX_PDD_EnableChannel(DMAMUX0_BASE_PTR, 2, PDD_DISABLE);
/* disable peripheral DMA */
TPM_PDD_WriteStatusControlReg(TPM0_DEVICE,TPM_PDD_ReadStatusControlReg(TPM0_DEVICE)&(~TPM_SC_DMA_MASK));
TPM_PDD_DisableChannelDma(TPM0_DEVICE, 1);
TPM_PDD_DisableChannelDma(TPM0_DEVICE, 0);
StopTimer(); /* stop TPM */
if (isTimeout) {
return ERR_BUSY;
}
return ERR_OK;
}
/* ===================================================================*/
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;
}