ST7735 Class Reference

API for the ST7735 LCD. More...

Detailed Description

• ID: st7735
• Name: ST7735 LCD
• Category: display
• Manufacturer: adafruit
• Link: http://www.adafruit.com/product/358
• Connection: spi

This module defines the interface for the ST7735 display library

    upm::ST7735 * lcd = new upm::ST7735(7, 4, 9, 8);
    lcd->fillScreen (ST7735_RED);
    lcd->refresh ();

    lcd->fillScreen (ST7735_CYAN);
    lcd->refresh ();

    lcd->fillScreen (ST7735_BLACK);
    lcd->refresh ();

    lcd->drawLine(10, 10, 10, 100, ST7735_MAGENTA);
    lcd->drawLine(20, 20, 10, 100, ST7735_YELLOW);
    lcd->drawLine(30, 30, 50, 100, ST7735_WHITE);
    lcd->refresh ();

    lcd->drawPixel (20, 20, ST7735_GREEN);
    lcd->refresh ();

    lcd->drawTriangle (50, 50, 80, 80, 60, 90, ST7735_GREEN);
    lcd->refresh ();

    lcd->drawCircle (100, 110, 10, ST7735_BLUE);
    lcd->refresh ();


    lcd->setTextWrap(0x0);

    lcd->setCursor(0, 30);
    lcd->setTextColor(ST7735_RED, ST7735_RED);
    lcd->setTextSize(1);
    lcd->print("Hello World!");

    lcd->setCursor(10, 50);
    lcd->setTextColor(ST7735_RED, ST7735_YELLOW);
    lcd->setTextSize(2);
    lcd->print("BIG");

    lcd->refresh ();

    std::cout << "exiting application" << std::endl;

    delete lcd;

Public Member Functions
	ST7735 (int csLCD, int cSD, int rs, int rst)
std::string	name ()
void	initModule ()
void	configModule ()
void	write (uint8_t value)
void	data (uint8_t value)
void	executeCMDList (const uint8_t *addr)
void	setAddrWindow (uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1)
void	drawPixel (int16_t x, int16_t y, uint16_t color)
void	refresh ()
mraa::Result	lcdCSOn ()
mraa::Result	lcdCSOff ()
mraa::Result	sdCSOn ()
mraa::Result	sdCSOff ()
mraa::Result	rsHIGH ()
mraa::Result	rsLOW ()
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	drawFastVLine (int16_t x, int16_t y, int16_t h, uint16_t color)
virtual void	drawFastHLine (int16_t x, int16_t y, int16_t w, uint16_t color)
virtual void	drawRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
virtual void	fillRect (int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
virtual void	fillScreen (uint16_t color)
virtual void	invertDisplay (bool i)
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)
void	print (std::string msg)
int16_t	width (void) const
int16_t	height (void) const
	GFX (int width, int height)
virtual	~GFX ()
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 ()
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)

Data Fields
uint8_t	m_map [160 *128 *2]
Data Fields inherited from GFX
uint8_t *	m_map

Additional Inherited Members
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

ST7735	(	int	csLCD,
		int	cSD,
		int	rs,
		int	rst
	)

Instantiates an ST7735 object

Parameters

csLCD	LCD chip select pin
cSD	SD card chip select pin
rs	Data/command pin
rst	Reset pin

Here is the call graph for this function:

Member Function Documentation

std::string name ( )

inline

Returns the name of the component

void initModule

(

)

Initializes the module GPIOs

Here is the call graph for this function:

Here is the caller graph for this function:

void configModule

(

)

Configures the chip via the SPI

Here is the call graph for this function:

Here is the caller graph for this function:

void write ( uint8_t  value )

virtual

Sends a command to an SPI bus (rs must be LOW)

Parameters

value

Command number

Reimplemented from GFX.

Here is the call graph for this function:

Here is the caller graph for this function:

void data

(

uint8_t

value

)

Sends data to an SPI bus (rs must be HIGH)

Parameters

value

Command number

Here is the call graph for this function:

Here is the caller graph for this function:

void executeCMDList

(

const uint8_t *

addr

)

Executes a set of commands and data

Parameters

addr	Pointer to the start of the commands/data section

Here is the call graph for this function:

Here is the caller graph for this function:

void setAddrWindow ( uint8_t  x0, uint8_t  y0, uint8_t  x1, uint8_t  y1  )

virtual

Sets the window size inside the screen where pixels data is written.

Parameters

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

Implements GFX.

Here is the call graph for this function:

Here is the caller graph for this function:

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

virtual

Sends a pixel color (RGB) to the chip.

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.

Here is the call graph for this function:

void refresh ( )

virtual

Copies the buffer to the chip via the SPI.

Implements GFX.

Here is the call graph for this function:

Here is the caller graph for this function:

mraa::Result lcdCSOn

(

)

LCD chip select is LOW

Here is the caller graph for this function:

mraa::Result lcdCSOff

(

)

LCD chip select is HIGH

Here is the caller graph for this function:

mraa::Result sdCSOn

(

)

CD card chip select is LOW

mraa::Result sdCSOff

(

)

CD card select is HIGH

mraa::Result rsHIGH

(

)

Data select is HIGH

Here is the caller graph for this function:

mraa::Result rsLOW

(

)

Data select is LOW

Here is the caller graph for this function:

Field Documentation

uint8_t m_map[160 *128 *2]

Screens buffer

Inheritance diagram for ST7735:

Collaboration diagram for ST7735:

---

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

• /iotdk/jenkins/workspace/upm-doc-stable/src/st7735/st7735.hpp
• /iotdk/jenkins/workspace/upm-doc-stable/src/st7735/st7735.cxx