NoDMA
touchgfx/hal/NoDMA.hpp
This is an "empty" DMA subclass that does nothing except assert if accidentally used. An instance of this object can be used if DMA support is not desired.
See: DMA_Interface
Inherits from: DMA_Interface
Public Functions
| virtual void | flush() |
| Block until all DMA transfers are complete. | |
| virtual BlitOperations | getBlitCaps() |
| No blit operations supported by this DMA implementation. | |
| NoDMA() | |
| virtual void | setupDataCopy(const BlitOp & blitOp) |
| Asserts if used. | |
| virtual void | setupDataFill(const BlitOp & blitOp) |
| Asserts if used. | |
| virtual void | signalDMAInterrupt() |
| Does nothing. | |
Additional inherited members
Public Functions inherited from DMA_Interface
| virtual void | addToQueue(const BlitOp & op) |
| Inserts a BlitOp for processing. | |
| bool | getAllowed() const |
| Gets whether a DMA operation is allowed to begin. | |
| virtual DMAType | getDMAType() |
| Function for obtaining the DMA type of the concrete DMA_Interface implementation. | |
| virtual void | initialize() |
| Perform initialization. | |
| uint8_t | isDmaQueueEmpty() |
| Query if the DMA queue is empty. | |
| uint8_t | isDmaQueueFull() |
| Query if the DMA queue is full. | |
| bool | isDMARunning() |
| Query if the DMA is running. | |
| void | setAllowed(bool allowed) |
| Sets whether or not a DMA operation is allowed to begin. | |
| virtual void | start() |
| Signals that DMA transfers can start. | |
| virtual | ~DMA_Interface() |
| Finalizes an instance of the DMA_Interface class. | |
Protected Functions inherited from DMA_Interface
| virtual void | disableAlpha() |
| Configures blit-op hardware for solid operation (no alpha-blending) | |
| DMA_Interface(DMA_Queue & dmaQueue) | |
| Constructs a DMA Interface object. | |
| virtual void | enableAlpha(uint8_t alpha) |
| Configures blit-op hardware for alpha-blending. | |
| virtual void | enableCopyWithTransparentPixels(uint8_t alpha) |
| Configures blit-op hardware for alpha-blending while simultaneously skipping transparent pixels. | |
| virtual void | execute() |
| Performs a queued blit-op. | |
| virtual void | executeCompleted() |
| To be called when blit-op has been performed. | |
| virtual void | seedExecution() |
| Called when elements are added to the DMA-queue. | |
| virtual void | waitForFrameBufferSemaphore() |
| Waits until framebuffer semaphore is available (i.e. | |
Protected Attributes inherited from DMA_Interface
| bool | isAllowed |
| true if DMA transfers are currently allowed. | |
| bool | isRunning |
| true if a DMA transfer is currently ongoing. | |
| DMA_Queue & | queue |
| Reference to the DMA queue. | |
Public Functions Documentation
flush
| virtual void flush | ( | ) |
Block until all DMA transfers are complete.
Since this particular DMA does not do anything, return immediately.
Reimplements: touchgfx::DMA_Interface::flush
getBlitCaps
| virtual BlitOperations getBlitCaps | ( | ) |
No blit operations supported by this DMA implementation.
Returns:
Zero (no blit ops supported).
Reimplements: touchgfx::DMA_Interface::getBlitCaps
NoDMA
| NoDMA | ( | ) |
setupDataCopy
| virtual void setupDataCopy | ( | const BlitOp & | blitOp | ) | |
Asserts if used.
Parameters:
| blitOp | The blit operation to be performed by this DMA instance. |
Reimplements: touchgfx::DMA_Interface::setupDataCopy
setupDataFill
| virtual void setupDataFill | ( | const BlitOp & | blitOp | ) | |
Asserts if used.
Parameters:
| blitOp | The blit operation to be performed by this DMA instance. |
Reimplements: touchgfx::DMA_Interface::setupDataFill
signalDMAInterrupt
| virtual void signalDMAInterrupt | ( | ) |
Does nothing.
Reimplements: touchgfx::DMA_Interface::signalDMAInterrupt