ILI9341 Class Reference

API for the ILI9342 LCD. More...

Detailed Description

• ID: ili9341
• Name: SPI Based LCD
• Category: display
• Manufacturer: adafruit
• Link: http://www.adafruit.com/product/2090
• Connection: spi

This module defines the interface for the ILI9341 display library

    // Pins (Edison)
    // CS_LCD   GP44 (MRAA 31)
    // CS_SD    GP43 (MRAA 38) unused
    // DC       GP12 (MRAA 20)
    // RESEST   GP13 (MRAA 14)
    upm::ILI9341 lcd(31, 38, 20, 14);

    // Fill the screen with a solid color
    lcd.fillScreen(lcd.color565(0, 40, 16));

    // Draw some shapes
    lcd.drawFastVLine(10, 10, 100, ILI9341_RED);
    lcd.drawFastHLine(20, 10, 50, ILI9341_CYAN);
    lcd.drawLine(160, 30, 200, 60, ILI9341_GREEN);
    lcd.fillRect(20, 30, 75, 60, ILI9341_ORANGE);
    lcd.drawCircle(70, 50, 20, ILI9341_PURPLE);
    lcd.fillCircle(120, 50, 20, ILI9341_PURPLE);
    lcd.drawTriangle(50, 100, 10, 140, 90, 140, ILI9341_YELLOW);
    lcd.fillTriangle(150, 100, 110, 140, 190, 140, ILI9341_YELLOW);
    lcd.drawRoundRect(20, 150, 50, 30, 10, ILI9341_RED);
    lcd.drawRoundRect(130, 150, 50, 30, 10, ILI9341_RED);
    lcd.fillRoundRect(75, 150, 50, 30, 10, ILI9341_RED);

    // Write some text
    lcd.setCursor(0, 200);
    lcd.setTextColor(ILI9341_LIGHTGREY);
    lcd.setTextWrap(true);
    lcd.setTextSize(1);
    lcd.print("Text 1\n");
    lcd.setTextSize(2);
    lcd.print("Text 2\n");
    lcd.setTextSize(3);
    lcd.print("Text 3\n");
    lcd.setTextSize(4);
    lcd.print("Text 4\n");

    // Test screen rotation
    for (int r = 0; r < 4; r++) {
        lcd.setRotation(r);
        lcd.fillRect(0, 0, 5, 5, ILI9341_WHITE);
        upm_delay(1);
    }

    // Invert colors, wait, then revert back
    lcd.invertDisplay(true);
    upm_delay(2);
    lcd.invertDisplay(false);

    // Don't forget to free up that memory!

Public Member Functions
	ILI9341 (int csLCD, int csSD, int dc, int rst)
std::string	name ()
void	initModule ()
void	configModule ()
void	setAddrWindow (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
void	drawPixel (int16_t x, int16_t y, uint16_t color)
void	drawFastVLine (int16_t x, int16_t y, int16_t h, uint16_t color)
void	drawFastHLine (int16_t x, int16_t y, int16_t w, uint16_t color)
void	fillRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
void	fillScreen (uint16_t color)
void	setRotation (uint8_t r)
void	invertDisplay (bool i)
uint16_t	color565 (uint8_t r, uint8_t g, uint8_t b)
void	executeCMDList (const uint8_t *addr)
void	writecommand (uint8_t c)
void	writedata (uint8_t d)
mraa::Result	lcdCSOn ()
mraa::Result	lcdCSOff ()
mraa::Result	sdCSOn ()
mraa::Result	sdCSOff ()
mraa::Result	dcHigh ()
mraa::Result	dcLow ()
mraa::Result	rstHigh ()
mraa::Result	rstLow ()
Public Member Functions inherited from GFX
	GFX (int16_t w, int16_t h)
virtual	~GFX ()
virtual void	drawLine (int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
virtual void	drawRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
void	drawCircle (int16_t x0, int16_t y0, int16_t r, uint16_t color)
void	drawCircleHelper (int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color)
void	fillCircle (int16_t x0, int16_t y0, int16_t r, uint16_t color)
void	fillCircleHelper (int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color)
void	drawTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
void	fillTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
void	drawRoundRect (int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color)
void	fillRoundRect (int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color)
void	drawChar (int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
int16_t	getCursorX (void) const
int16_t	getCursorY (void) const
void	setCursor (int16_t x, int16_t y)
void	setTextColor (uint16_t c)
void	setTextColor (uint16_t c, uint16_t bg)
void	setTextSize (uint8_t s)
void	setTextWrap (bool w)
uint8_t	getRotation (void) const
void	setRotation (uint8_t r)
void	cp437 (bool x)
virtual void	write (uint8_t c)
void	print (std::string msg)
int16_t	width (void) const
int16_t	height (void) const
	GFX (int width, int height)
virtual	~GFX ()
virtual void	refresh ()=0
void	drawChar (int16_t x, int16_t y, uint8_t data, uint16_t color, uint16_t bg, uint8_t size)
void	print (std::string msg)
void	fillScreen (uint16_t color)
void	fillRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
void	drawFastVLine (int16_t x, int16_t y, int16_t h, uint16_t color)
void	drawLine (int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
void	drawTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
void	drawCircle (int16_t x, int16_t y, int16_t r, uint16_t color)
void	setCursor (int16_t x, int16_t y)
void	setTextColor (uint16_t textColor, uint16_t textBGColor)
void	setTextSize (uint8_t size)
void	setTextWrap (uint8_t wrap)
	GFX (int width, int height, uint8_t *screenBuffer, const unsigned char *font)
virtual	~GFX ()
virtual void	setAddrWindow (uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1)=0
virtual void	refresh ()=0
void	drawChar (int16_t x, int16_t y, uint8_t data, uint16_t color, uint16_t bg, uint8_t size)
void	print (std::string msg)
mraa::Result	setPixel (int x, int y, uint16_t color)
void	fillScreen (uint16_t color)
void	fillRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
void	drawFastVLine (int16_t x, int16_t y, int16_t h, uint16_t color)
void	drawLine (int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
void	drawTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
void	drawCircle (int16_t x, int16_t y, int16_t r, uint16_t color)
void	setCursor (int16_t x, int16_t y)
void	setTextColor (uint16_t textColor, uint16_t textBGColor)
void	setTextSize (uint8_t size)
void	setTextWrap (uint8_t wrap)

Additional Inherited Members
Data Fields inherited from GFX
uint8_t *	m_map
Protected Attributes inherited from GFX
const int16_t	WIDTH
const int16_t	HEIGHT
int16_t	_width
int16_t	_height
uint8_t	rotation
uint16_t	textcolor
uint16_t	textbgcolor
int16_t	cursor_x
int16_t	cursor_y
uint8_t	textsize
bool	wrap
bool	_cp437
int	m_width
int	m_height
int	m_textSize
int	m_textColor
int	m_textBGColor
int	m_cursorX
int	m_cursorY
int	m_wrap
const unsigned char *	m_font
Static Protected Attributes inherited from GFX
static const unsigned char	font []

Constructor & Destructor Documentation

ILI9341	(	int	csLCD,
		int	csSD,
		int	dc,
		int	rst
	)

Instantiates an ILI9341 object

Parameters

csLCD	LCD chip select pin
csSD	SD card select pin
dc	Data/command pin
rst	Reset pin

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Member Function Documentation

std::string name ( )

inline

Returns the name of the component

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void initModule

(

)

Initializes GPIOs used to talk to the LCD

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void configModule

(

)

Configures the LCD driver chip via SPI

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void setAddrWindow	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1
	)

Sets the window size inside the screen where pixel data is written. Concrete implementation from GFX interface.

Parameters

x0	First coordinate
y0	First coordinate
x1	Second coordinate
y1	Second coordinate

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void drawPixel ( int16_t  x, int16_t  y, uint16_t  color  )

virtual

Sends a pixel color (RGB) to the driver chip. Concrete implementation from GFX interface.

Parameters

x	Axis on the horizontal scale
y	Axis on the vertical scale
color	RGB (16-bit) color (R[0-4], G[5-10], B[11-15]

Implements GFX.

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void drawFastVLine ( int16_t  x, int16_t  y, int16_t  h, uint16_t  color  )

virtual

Draws a vertical line using minimal SPI writes.

Parameters

x	Axis on the horizontal scale to begin line
y	Axis on the vertical scale to begin line
h	Height of line in pixels
color	RGB (16-bit) color (R[0-4], G[5-10], B[11-15]

Reimplemented from GFX.

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void drawFastHLine ( int16_t  x, int16_t  y, int16_t  w, uint16_t  color  )

virtual

Draws a horizontal line using minimal SPI writes.

Parameters

x	Axis on the horizontal scale to begin line
y	Axis on the vertical scale to begin line
w	Width of line in pixels
color	RGB (16-bit) color (R[0-4], G[5-10], B[11-15]

Reimplemented from GFX.

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void fillRect ( int16_t  x, int16_t  y, int16_t  w, int16_t  h, uint16_t  color  )

virtual

Draw a filled rectangle.

Parameters

x	Axis on the horizontal scale of upper-left corner
y	Axis on the vertical scale of upper-left corner
w	Width of rectangle in pixels
h	Height of rectangle in pixels
color	RGB (16-bit) color (R[0-4], G[5-10], B[11-15]

Reimplemented from GFX.

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void fillScreen ( uint16_t  color )

virtual

Fill the screen with a single color.

Parameters

color

RGB (16-bit) color (R[0-4], G[5-10], B[11-15]

Reimplemented from GFX.

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void setRotation

(

uint8_t

r

)

Sets the screen to one of four 90 deg rotations.

Parameters

r	Rotation setting: 0, 1, 2, 3

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void invertDisplay ( bool  i )

virtual

Invert colors on the display.

Parameters

i	True or false to invert colors

Reimplemented from GFX.

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uint16_t color565	(	uint8_t	r,
		uint8_t	g,
		uint8_t	b
	)

Pass 8-bit R, G, B values and get back 16-bit packed color.

Parameters

r	Red color 0-31
g	Green color 0-63
b	blue color 0-31

Returns

16-bit packed color (RGB) value

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void executeCMDList

(

const uint8_t *

addr

)

Executes a set of commands and data.

Parameters

addr	Pointer to the start of the commands/data section

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void writecommand

(

uint8_t

c

)

Sends a command to the display driver via SPI.

Parameters

c	Command to be written

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void writedata

(

uint8_t

d

)

Sends data to the display driver via SPI

Parameters

d	Data to be written

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mraa::Result lcdCSOn

(

)

Set LCD chip select to LOW

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mraa::Result lcdCSOff

(

)

Set LCD chip select to HIGH

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mraa::Result sdCSOn

(

)

Set SD card chip select to LOW

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mraa::Result sdCSOff

(

)

Set SD card chip select to HIGH

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mraa::Result dcHigh

(

)

Set data/command line to HIGH

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mraa::Result dcLow

(

)

Set data/command line to LOW

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mraa::Result rstHigh

(

)

Set reset line to HIGH

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mraa::Result rstLow

(

)

Set reset line to LOW

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Inheritance diagram for ILI9341:

Collaboration diagram for ILI9341:

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

• src/ili9341/ili9341.hpp
• src/ili9341/ili9341.cxx