ST7735 Class Reference

C++ API for ST7735 SPI LCD module. More...

Detailed Description

This file defines the ST7735 C++ interface for libst7735

    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 (uint8_t csLCD, uint8_t cSD, uint8_t rs, uint8_t rst)
	~ST7735 ()
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_t	lcdCSOn ()
mraa_result_t	lcdCSOff ()
mraa_result_t	sdCSOn ()
mraa_result_t	sdCSOff ()
mraa_result_t	rsHIGH ()
mraa_result_t	rsLOW ()
Public Member Functions inherited from GFX
	GFX (int width, int height, uint8_t *screenBuffer, const unsigned char *font)
	~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_t	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
int	m_height
int	m_width
int	m_textSize
int	m_textColor
int	m_textBGColor
int	m_cursorX
int	m_cursorY
int	m_wrap
uint8_t *	m_map

Additional Inherited Members
Protected Attributes inherited from GFX
const int16_t	WIDTH
const int16_t	HEIGHT
const unsigned char *	m_font

Constructor & Destructor Documentation

ST7735	(	uint8_t	csLCD,
		uint8_t	cSD,
		uint8_t	rs,
		uint8_t	rst
	)

Instanciates a ST7735 object

Parameters

csLCD	LCD chip select pin
cSD	SD card chip select pin
rs	data/command pin
rst	reset pin

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~ST7735

(

)

ST7735 object destructor

Member Function Documentation

std::string name ( )

inline

Return name of the component

void initModule

(

)

Initialize the modules GPIOs

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void configModule

(

)

Configure the chip via SPI interface

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void write

(

uint8_t

value

)

Send command to SPI bus (rs must be LOW)

Parameters

value

command number

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void data

(

uint8_t

value

)

Send data to SPI bus (rs must be HIGH)

Parameters

value

command number

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void executeCMDList

(

const uint8_t *

addr

)

Execute set of commands and data

Parameters

addr	pointer to start of the commands/data section

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

virtual

Set the window size inside the screen where the pixels data will be written.

Parameters

x0	first coordinate
y0	first coordinate
x1	second coordinate
y1	second coordinate

Implements GFX.

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

virtual

Send pixel collor (RGB) to the chip.

Parameters

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

Implements GFX.

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void refresh ( )

virtual

Copy the buffer to the chip via SPI interface.

Implements GFX.

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mraa_result_t lcdCSOn

(

)

LCD chip select LOW.

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mraa_result_t lcdCSOff

(

)

LCD chip select HIGH.

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mraa_result_t sdCSOn

(

)

CD card chip select LOW.

mraa_result_t sdCSOff

(

)

CD card select HIGH.

mraa_result_t rsHIGH

(

)

Data select HIGH.

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mraa_result_t rsLOW

(

)

Data select LOW.

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Field Documentation

uint8_t m_map[160 *128 *2]

Screens buffer

Inheritance diagram for ST7735:

Collaboration diagram for ST7735:

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

• /var/lib/jenkins/workspace/upm-doc/src/st7735/st7735.h
• /var/lib/jenkins/workspace/upm-doc/src/st7735/st7735.cxx