Hi,
The L4R9AI-EVAL has a display with GRAM, so only one TouchGFX framebuffer is necessary. Partial framebuffers is for low cost solution MCUs like G0 that have little internal memory and when the project does not wish to rely on external SDRAM to fit a full framebuffer.
Yes, you can access the framebuffer and do anything you want to the content there. Use
HAL::getInstance()->lockFrameBuffer();
Signature:
/**
* @fn virtual uint16_t* HAL::lockFrameBuffer();
*
* @brief Waits for the frame buffer to become available for use.
*
* Waits for the frame buffer to become available for use (i.e. not used by DMA
* transfers).
*
* @note Function blocks until frame buffer is available. Client code MUST call
* unlockFrameBuffer() when frame buffer operation has completed.
*
* @return A pointer to the beginning of the currently used frame buffer.
*/
virtual uint16_t* lockFrameBuffer();
Yes, TouchGFX supports vertical swipe.
/**
* @typedef enum GestureType
*
* @brief The gesture event types.
*/
typedef enum
{
SWIPE_HORIZONTAL, ///< An enum constant representing a horizontal swipe
SWIPE_VERTICAL ///< An enum constant representing a vertical swipe
} GestureType;
If you override the following method in your view, you'll get an event for either horizontal or vertical swipe:
/**
* @fn virtual void Drawable::handleGestureEvent(const GestureEvent& evt)
*
* @brief Defines the event handler interface for GestureEvents.
*
* Defines the event handler interface for GestureEvents. The default implementation
* ignores the event. The event is only received if the drawable is touchable.
*
* @param evt The GestureEvent received from the HAL.
*/
virtual void handleGestureEvent(const GestureEvent& evt) { }
/Martin
