Adafruit_LvGL_Glue Class Reference

Class to act as a "glue" layer between the LvGL graphics library and most of Adafruit's TFT displays. More...

#include <Adafruit_LvGL_Glue.h>

Inheritance diagram for Adafruit_LvGL_Glue:

Public Member Functions
	Adafruit_LvGL_Glue (void)
	Construct a new Adafruit_LvGL_Glue::Adafruit_LvGL_Glue object, initializing minimal variables.
	~Adafruit_LvGL_Glue (void)
	Destroy the Adafruit_LvGL_Glue::Adafruit_LvGL_Glue object, freeing any memory previously allocated within this library.
LvGLStatus	begin (Adafruit_SPITFT *tft, Adafruit_STMPE610 *touch, bool debug=false)
	Configure the glue layer and the underlying LvGL code to use the given TFT display driver instance and touchscreen controller. More...
LvGLStatus	begin (Adafruit_SPITFT *tft, TouchScreen *touch, bool debug=false)
	Configure the glue layer and the underlying LvGL code to use the given TFT display driver and touchscreen controller instances. More...
LvGLStatus	begin (Adafruit_SPITFT *tft, bool debug=false)
	Configure the glue layer and the underlying LvGL code to use the given TFT display driver and touchscreen controller instances. More...

Public Attributes
Adafruit_SPITFT *	display
	Pointer to the SPITFT display instance.
void *	touchscreen
	Pointer to the touchscreen object to use.
bool	is_adc_touch
	determines if the touchscreen controlelr is ADC based
bool	first_frame

Detailed Description

Class to act as a "glue" layer between the LvGL graphics library and most of Adafruit's TFT displays.

Member Function Documentation

begin() [1/3]

LvGLStatus Adafruit_LvGL_Glue::begin	(	Adafruit_SPITFT *	tft,
		Adafruit_STMPE610 *	touch,
		bool	debug = false
	)

Configure the glue layer and the underlying LvGL code to use the given TFT display driver instance and touchscreen controller.

Parameters

tft	Pointer to an already initialized display object instance
touch	Pointer to an already initialized Adafruit_STMPE610 touchscreen controller object instance
debug	Debug flag to enable debug messages. Only used if LV_USE_LOG is configured in LittleLVGL's lv_conf.h

Returns

LvGLStatus The status of the initialization:

• LVGL_OK : Success
• LVGL_ERR_TIMER : Failure to set up timers
• LVGL_ERR_ALLOC : Failure to allocate memory

begin() [2/3]

LvGLStatus Adafruit_LvGL_Glue::begin	(	Adafruit_SPITFT *	tft,
		TouchScreen *	touch,
		bool	debug = false
	)

Configure the glue layer and the underlying LvGL code to use the given TFT display driver and touchscreen controller instances.

Parameters

tft	Pointer to an already initialized display object instance
touch	Pointer to an already initialized TouchScreen touchscreen controller object instance
debug	Debug flag to enable debug messages. Only used if LV_USE_LOG is configured in LittleLVGL's lv_conf.h

Returns

LvGLStatus The status of the initialization:

• LVGL_OK : Success
• LVGL_ERR_TIMER : Failure to set up timers
• LVGL_ERR_ALLOC : Failure to allocate memory

begin() [3/3]

LvGLStatus Adafruit_LvGL_Glue::begin	(	Adafruit_SPITFT *	tft,
		bool	debug = false
	)

Configure the glue layer and the underlying LvGL code to use the given TFT display driver and touchscreen controller instances.

Parameters

tft	Pointer to an already initialized display object instance
debug	Debug flag to enable debug messages. Only used if LV_USE_LOG is configured in LittleLVGL's lv_conf.h

Returns

LvGLStatus The status of the initialization:

• LVGL_OK : Success
• LVGL_ERR_TIMER : Failure to set up timers
• LVGL_ERR_ALLOC : Failure to allocate memory

Member Data Documentation

first_frame

bool Adafruit_LvGL_Glue::first_frame

Tracks if a call to lv_flush_callback needs to wait for DMA transfer to complete

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The documentation for this class was generated from the following files:

• Adafruit_LvGL_Glue.h
• Adafruit_LvGL_Glue.cpp