Class to control ST7735 TFT basic functionality. More...

#include <ST7735_TFT_LCD_RDL.hpp>

Inheritance diagram for ST7735_TFT:

[legend]

Public Types
enum	TFT_modes_e : uint8_t { TFT_Normal_mode = 0 , TFT_Partial_mode , TFT_Idle_mode , TFT_Sleep_mode , TFT_Invert_mode , TFT_Display_on_mode , TFT_Display_off_mode }

enum	TFT_PCBtype_e : uint8_t { TFT_ST7735R_Red = 0 , TFT_ST7735R_Green , TFT_ST7735S_Black , TFT_ST7735B }

Public Types inherited from color16_graphics
enum	pixel_color565_e : uint16_t { RDLC_BLACK = 0x0000 , RDLC_BLUE = 0x001F , RDLC_RED = 0xF800 , RDLC_GREEN = 0x07E0 , RDLC_CYAN = 0x07FF , RDLC_MAGENTA = 0xF81F , RDLC_YELLOW = 0xFFE0 , RDLC_WHITE = 0xFFFF , RDLC_TAN = 0xED01 , RDLC_GREY = 0x9CD1 , RDLC_BROWN = 0x6201 , RDLC_DGREEN = 0x01C0 , RDLC_ORANGE = 0xFC00 , RDLC_NAVY = 0x000F , RDLC_DCYAN = 0x03EF , RDLC_MAROON = 0x7800 , RDLC_PURPLE = 0x780F , RDLC_OLIVE = 0x7BE0 , RDLC_LGREY = 0xC618 , RDLC_DGREY = 0x7BEF , RDLC_GYELLOW = 0xAFE5 , RDLC_PINK = 0xFC18 , RDLC_LBLUE = 0x7E5F , RDLC_BEIGE = 0xB5D2 }
	16-bit color definitions (RGB565 format). More...

enum	display_rotate_e : uint8_t { Degrees_0 = 0 , Degrees_90 , Degrees_180 , Degrees_270 }

Public Types inherited from Print
enum	BaseNum : uint8_t { RDL_DEC = 10 , RDL_HEX = 16 , RDL_OCT = 8 , RDL_BIN = 2 }

Public Member Functions
	ST7735_TFT ()
	Constructor for class ST7735_TFT.

virtual void	setAddrWindow (uint16_t, uint16_t, uint16_t, uint16_t) override
	SPI displays set an address window rectangle for blitting pixels.

void	TFTSetupGPIO (int8_t, int8_t, int8_t, int8_t, int8_t)
	sets up TFT GPIO for software SPI

void	TFTSetupGPIO (int8_t, int8_t)
	sets up TFT GPIO for Hardware SPi

void	TFTInitScreenSize (uint8_t xOffset, uint8_t yOffset, uint16_t w, uint16_t h)
	initialise the variables that define the size of the screen

rdlib::Return_Codes_e	TFTInitPCBType (TFT_PCBtype_e pcbType, uint16_t CommDelay, int gpioDev)
	intialise PCBtype and SPI, Software SPI

rdlib::Return_Codes_e	TFTInitPCBType (TFT_PCBtype_e pcbType, int device, int channel, int speed, int flags, int gpioDev)
	intialise PCBtype and SPI, Hardware SPI

uint16_t	HighFreqDelayGet (void)
	Freq delay used in SW SPI getter, uS delay used in SW SPI method.

void	HighFreqDelaySet (uint16_t)
	Freq delay used in SW SPI setter, uS delay used in SW SPI method.

rdlib::Return_Codes_e	TFTPowerDown (void)
	Call when powering down TFT.

rdlib::Return_Codes_e	TFTResetPin (void)
	Method for Hardware Reset pin control.

void	TFTsetRotation (display_rotate_e r)
	: change rotation of display.

void	TFTchangeInvertMode (bool invertModeOn)
	Toggle the invert mode.

void	TFTchangeMode (TFT_modes_e m)
	This changes the mode of the display as:

void	TFTsetScrollDefinition (uint8_t th, uint8_t tb, bool sd)
	This method defines the Vertical Scrolling Area of the display where:

void	TFTVerticalScroll (uint8_t vsp)
	: This method is used together with the TFTsetScrollDefinition.

Public Member Functions inherited from color16_graphics
	color16_graphics ()
	Construct a new graphics class object.

void	fillScreen (uint16_t color)
	Fills the whole screen with a given color.

void	setCursor (int16_t x, int16_t y)
	Set the Cursor Position on screen.

void	drawPixel (uint16_t, uint16_t, uint16_t)
	Draw a pixel to screen.

rdlib::Return_Codes_e	drawDotGrid (int16_t x, int16_t y, int16_t w, int16_t h, uint8_t DotGridGap, uint16_t color)
	Draws a grid of dots on the screen starting from the given coordinates. This function draws a grid of pixels with a specified gap between them. It checks that the provided coordinates and dimensions are within the screen bounds and adjusts them if necessary. It also validates The grid of dots gap value and defaults it to 2 if invalid.

void	drawLine (int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
	draws a line from (x0,y0) to (x1,y1).

rdlib::Return_Codes_e	drawFastVLine (uint16_t x, uint16_t y, uint16_t h, uint16_t color)
	Draws a vertical line starting at (x,y) with height h.

rdlib::Return_Codes_e	drawFastHLine (uint16_t x, uint16_t y, uint16_t w, uint16_t color)
	Draws a horizontal line starting at (x,y) with width w.

void	drawLineAngle (int16_t x, int16_t y, int angle, uint8_t start, uint8_t length, int offset, uint16_t color)
	Draws a line using an angle and length as parameters. This function draws a line starting from `(x, y)`, extending in the direction specified by `angle`, with a given `length`. The function also allows applying an `offset` to the angle before computing the line’s end coordinates.

void	drawRectWH (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color)
	draws rectangle at (x,y) where h is height and w is width of the rectangle.

rdlib::Return_Codes_e	fillRectangle (uint16_t, uint16_t, uint16_t, uint16_t, uint16_t)
	fills a rectangle starting from coordinates (x,y) with width of w and height of h.

void	fillRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color)
	fills a rectangle at (x,y) where h is height and w is width of the rectangle.

void	drawRoundRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t r, uint16_t color)
	draws a rectangle with rounded edges

void	fillRoundRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t r, uint16_t color)
	Fills a rectangle with rounded edges.

void	drawCircle (int16_t x0, int16_t y0, int16_t r, uint16_t color)
	draws a circle where (x0,y0) are center coordinates an r is circle radius.

void	fillCircle (int16_t x0, int16_t y0, int16_t r, uint16_t color)
	fills a circle where (x0,y0) are center coordinates an r is circle radius.

void	drawEllipse (int16_t cx, int16_t cy, int16_t semiMajorAxis, int16_t semiMinorAxis, bool fill, uint16_t color)
	Draw an ellipse on the display. This function uses the midpoint ellipse algorithm to efficiently draw an ellipse centered at (cx, cy) with the given semi-major (horizontal) and semi-minor (vertical) axes.

void	drawTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
	draws a triangle of coordinates (x0,y0), (x1,y1) and (x2,y2).

void	fillTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
	Fills a triangle of coordinates (x0,y0), (x1,y1) and (x2,y2).

void	drawQuadrilateral (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, int16_t x3, int16_t y3, uint16_t color)
	Draws a quadrilateral (four-sided polygon) by connecting four points with lines. This function draws a quadrilateral by drawing four lines between the given vertices. The lines are drawn in the order: (x0, y0) to (x1, y1), (x1, y1) to (x2, y2), (x2, y2) to (x3, y3), and finally (x3, y3) back to (x0, y0).

void	fillQuadrilateral (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, int16_t x3, int16_t y3, uint16_t color, bool useTriangleSplit=true)
	Fills a quadrilateral with the specified color using triangles. This function fills a quadrilateral by dividing it into triangles and filling them individually. The quadrilateral is filled by calling the `fillTriangle` function three times with appropriate vertex coordinates. The `useTriangleSplit` parameter determines whether the quadrilateral is divided into two triangles or if only one triangle is used.

rdlib::Return_Codes_e	drawPolygon (int16_t x, int16_t y, uint8_t sides, int16_t diameter, float rotation, bool fill, uint16_t color)
	Draws a polygon with a specified number of sides, diameter, rotation, and color. This function draws a regular polygon by connecting points equally spaced around a circle, with each point having a distance defined by the diameter. The polygon is rotated by the given angle (in degrees) before being drawn. The number of sides is enforced to be at least 3.

void	drawSimpleArc (int16_t cx, int16_t cy, int16_t radius, float startAngle, float endAngle, uint16_t color)
	Draw a simple arc of one pixel on the display( no offsets , thickness or maximum arc calculations) This function draws an arc between two angles (start and end) on a circle with a given radius.

void	drawArc (uint16_t cx, uint16_t cy, uint16_t radius, uint16_t thickness, float startAngle, float endAngle, uint16_t color)
	Draw an arc on the TFT display. This function draws an arc between two angles (start and end) on a circle with a given radius.

float	getArcAngleMax () const
	Get the current maximum angle of the arc.

void	setArcAngleMax (float arcAngleMax)
	Set a new maximum angle for the arc.

int	getArcAngleOffset () const
	Get the current angle offset.

void	setArcAngleOffset (int arcAngleOffset)
	Set a new angle offset.

virtual size_t	write (uint8_t) override
	write method used in the print class when user calls print

rdlib::Return_Codes_e	writeChar (int16_t x, int16_t y, char value)
	Write 1 character on Display.

rdlib::Return_Codes_e	writeCharString (int16_t x, int16_t y, char *text)
	Write Text character array on display.

void	setTextWrap (bool w)
	turn on or off screen wrap of the text (fonts 1-6)

void	setTextColor (uint16_t c, uint16_t bg)
	Set text color foreground and background.

void	setTextColor (uint16_t c)
	Set text color foreground.

rdlib::Return_Codes_e	drawIcon (uint16_t x, uint16_t y, uint16_t w, uint16_t color, uint16_t bgcolor, const std::span< const uint8_t > data)
	Draws an custom Icon of X by 8 size to screen , where X = 0 to 127.

rdlib::Return_Codes_e	drawBitmap (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color, uint16_t bgcolor, const std::span< const uint8_t > data)
	: Draws an bi-color bitmap to screen

rdlib::Return_Codes_e	drawBitmap24 (uint16_t x, uint16_t y, const std::span< const uint8_t > data, uint16_t w, uint16_t h)
	Draws an 24 bit color bitmap to screen from a data array.

rdlib::Return_Codes_e	drawBitmap16 (uint16_t x, uint16_t y, const std::span< const uint8_t > data, uint16_t w, uint16_t h)
	: Draws an 16 bit color bitmap to screen from a data array

rdlib::Return_Codes_e	drawSprite (uint16_t x, uint16_t y, const std::span< const uint8_t > data, uint16_t w, uint16_t h, uint16_t backgroundColor)
	: Draws an 16 bit color sprite bitmap to screen with transparent background

int16_t	Color565 (int16_t, int16_t, int16_t)
	: Convert: 24-bit color to 565 16-bit color

int	getDisplaySPIBlockSize () const
	Gets the maximum SPI transaction block size.

void	setDisplaySPIBlockSize (int size)
	Sets the maximum SPI transaction block size.

Public Member Functions inherited from display_Fonts
	display_Fonts ()
	init the OLED font class object constructor

rdlib::Return_Codes_e	setFont (display_Font_name_e)
	SetFont.

void	setInvertFont (bool invertStatus)
	setInvertFont

bool	getInvertFont (void)
	getInvertFont

Public Member Functions inherited from Print
int	getWriteError ()
	gets the error flag status, zero no error

void	clearWriteError ()
	clears the error flag by setting it to zero

virtual size_t	write (const uint8_t *buffer, size_t size)
	define in the sub class

size_t	write (const char *str)
	Writes a string to the output.

size_t	write (const char *buffer, size_t size)
	Writes a buffer of a specified size to the output.

virtual int	availableForWrite ()
	define in the sub class

size_t	print (const char[])
	print an array

size_t	print (char)
	print an character

size_t	print (int, int=RDL_DEC)
	print an integer of base number system

size_t	print (unsigned int, int=RDL_DEC)
	print an unsigned integer of base number system

size_t	print (long, int=RDL_DEC)
	print an long integer of base number system

size_t	print (unsigned long, int=RDL_DEC)
	print an unsigned long integer of base number system

size_t	print (double, int=2)
	print an double

size_t	print (const std::string &)
	print an C++ string object

size_t	println (const char[])
	Prints a character array followed by a newline.

size_t	println (char)
	print an character followed by new line

size_t	println (int, int=RDL_DEC)
	print an integer of base number system followed by new line

size_t	println (unsigned int, int=RDL_DEC)
	print an unsigned integer of base number system followed by new line

size_t	println (long, int=RDL_DEC)
	print an long integer of base number system followed by new line

size_t	println (unsigned long, int=RDL_DEC)
	print an unsigned long integer of base number system followed by new line

size_t	println (double, int=2)
	print an double

size_t	println (void)
	Goto to new line.

size_t	println (const std::string &s)
	print an C++ string object followed by new line

template<typename T >
size_t	print (const std::vector< T > &v, int format=defaultFormat< T >())
	Print a vector of any type.

template<typename T >
size_t	println (const std::vector< T > &vec, int format=defaultFormat< T >())
	Print a vector of elements followed by a newline.

template<typename T , size_t N>
size_t	print (const std::array< T, N > &arr, int format=defaultFormat< T >())
	Print a std::array of any type.

template<typename T , size_t N>
size_t	println (const std::array< T, N > &arr, int format=defaultFormat< T >())
	Print a std::array of elements followed by a newline.

Public Attributes
TFT_modes_e	TFT_mode

display_rotate_e	displayRotate = Degrees_0

TFT_PCBtype_e	TFT_PCBtype

Private Member Functions
rdlib::Return_Codes_e	TFTST7735BInitialize (void)
	init routine for ST7735B controller

rdlib::Return_Codes_e	TFTGreenTabInitialize (void)
	init sub-routine ST7735R Green Tab

rdlib::Return_Codes_e	TFTBlackTabInitialize (void)
	Init Routine ST7735R Black Tab (ST7735S)

rdlib::Return_Codes_e	TFTRedTabInitialize (void)
	ST7735R Red Tab Init Red PCB version.

rdlib::Return_Codes_e	TFTSPIInit (void)
	init the SPI

rdlib::Return_Codes_e	TFTDataCommandPin (void)
	Method for Data or Command pin setup.

rdlib::Return_Codes_e	TFTClock_Data_ChipSelect_Pins (void)
	Method for Clock, data and chip select pin setup routine for software SPI.

void	Rcmd1 (void)
	init sub-routine

void	Rcmd2red (void)
	init sub-routine

void	Rcmd3 (void)
	init sub-routine

void	Bcmd (void)
	init sub-routine for ST7735B controller

void	Rcmd2green (void)
	init sub-routine ST7735R Green Tab

Private Attributes
uint8_t	_colstart

uint8_t	_rowstart

uint16_t	_widthStartTFT

uint16_t	_heightStartTFT

int	_spiDev = 0

int	_spiChan = 0

int	_spiBaud = 50000

int	_spiFlags = 0

Static Private Attributes
static constexpr uint8_t	ST7735_NOP = 0x00

static constexpr uint8_t	ST7735_SWRESET = 0x01

static constexpr uint8_t	ST7735_RDDID = 0x04

static constexpr uint8_t	ST7735_RDDST = 0x09

static constexpr uint8_t	ST7735_SLPIN = 0x10

static constexpr uint8_t	ST7735_SLPOUT = 0x11

static constexpr uint8_t	ST7735_PTLON = 0x12

static constexpr uint8_t	ST7735_NORON = 0x13

static constexpr uint8_t	ST7735_INVOFF = 0x20

static constexpr uint8_t	ST7735_INVON = 0x21

static constexpr uint8_t	ST7735_DISPOFF = 0x28

static constexpr uint8_t	ST7735_DISPON = 0x29

static constexpr uint8_t	ST7735_TFT_Idle_modeON = 0x39

static constexpr uint8_t	ST7735_TFT_Idle_modeOF = 0x38

static constexpr uint8_t	ST7735_CASET = 0x2A

static constexpr uint8_t	ST7735_RASET = 0x2B

static constexpr uint8_t	ST7735_RAMWR = 0x2C

static constexpr uint8_t	ST7735_RAMRD = 0x2E

static constexpr uint8_t	ST7735_PTLAR = 0x30

static constexpr uint8_t	ST7735_VSCRDEF = 0x33

static constexpr uint8_t	ST7735_COLMOD = 0x3A

static constexpr uint8_t	ST7735_MADCTL = 0x36

static constexpr uint8_t	ST7735_VSCRSADD = 0x37

static constexpr uint8_t	ST7735_FRMCTR1 = 0xB1

static constexpr uint8_t	ST7735_FRMCTR2 = 0xB2

static constexpr uint8_t	ST7735_FRMCTR3 = 0xB3

static constexpr uint8_t	ST7735_INVCTR = 0xB4

static constexpr uint8_t	ST7735_DISSET5 = 0xB6

static constexpr uint8_t	ST7735_PWCTR1 = 0xC0

static constexpr uint8_t	ST7735_PWCTR2 = 0xC1

static constexpr uint8_t	ST7735_PWCTR3 = 0xC2

static constexpr uint8_t	ST7735_PWCTR4 = 0xC3

static constexpr uint8_t	ST7735_PWCTR5 = 0xC4

static constexpr uint8_t	ST7735_PWCTR6 = 0xFC

static constexpr uint8_t	ST7735_VMCTR1 = 0xC5

static constexpr uint8_t	ST7735_RDID1 = 0xDA

static constexpr uint8_t	ST7735_RDID2 = 0xDB

static constexpr uint8_t	ST7735_RDID3 = 0xDC

static constexpr uint8_t	ST7735_RDID4 = 0xDD

static constexpr uint8_t	ST7735_GMCTRP1 = 0xE0

static constexpr uint8_t	ST7735_GMCTRN1 = 0xE1

static constexpr uint8_t	ST7735_MADCTL_MY = 0x80

static constexpr uint8_t	ST7735_MADCTL_MX = 0x40

static constexpr uint8_t	ST7735_MADCTL_MV = 0x20

static constexpr uint8_t	ST7735_MADCTL_ML = 0x10

static constexpr uint8_t	ST7735_MADCTL_RGB = 0x00

static constexpr uint8_t	ST7735_MADCTL_BGR = 0x08

static constexpr uint8_t	ST7735_MADCTL_MH = 0x04

Additional Inherited Members
Protected Member Functions inherited from color16_graphics
void	pushColor (uint16_t color)
	pushColor

void	writeCommand (uint8_t)
	: Write an SPI command to

void	writeData (uint8_t)
	Write an SPI data byte to device.

void	spiWrite (uint8_t)
	Write byte to SPI.

void	spiWriteDataBuffer (uint8_t *spidata, int len)
	Write a buffer to SPI, both Software and hardware SPI supported.

Protected Member Functions inherited from Print
void	setWriteError (int err=0)

Protected Attributes inherited from color16_graphics
bool	_textwrap = true

uint16_t	_textcolor = 0xFFFF

uint16_t	_textbgcolor = 0x0000

int16_t	_cursorX = 0

int16_t	_cursorY = 0

uint16_t	_width

uint16_t	_height

uint8_t	_XStart = 0

uint8_t	_YStart = 0

float	_arcAngleMax = 360.0f

int	_arcAngleOffset = 0

int8_t	_Display_DC

int8_t	_Display_RST

int8_t	_Display_CS

int8_t	_Display_SCLK

int8_t	_Display_SDATA

int8_t	_Display_MISO

int	_DeviceNumGpioChip = 0

int	_GpioHandle = 0

bool	_hardwareSPI =true

uint16_t	_HighFreqDelay = 0

int	_spiHandle = 0

Protected Attributes inherited from display_Fonts
std::span< const uint8_t >	_FontSelect = pFontDefault

uint8_t	_Font_X_Size = 0x08

uint8_t	_Font_Y_Size = 0x08

uint8_t	_FontOffset = 0x20

uint8_t	_FontNumChars = 0x5F

Detailed Description

Class to control ST7735 TFT basic functionality.

Member Enumeration Documentation

◆ TFT_modes_e

enum ST7735_TFT::TFT_modes_e : uint8_t

TFT display modes

Enumerator
TFT_Normal_mode	In this mode, the display is able to show maximum 262
TFT_Partial_mode	In this mode part of the display is used with maximum 262
TFT_Idle_mode	In this mode, part of the display is used but with 8 colors.
TFT_Sleep_mode	In this mode, the DC: DC converter, internal oscillator and panel driver circuit are stopped. Only the MCU interface and memory works with VDDI power supply. Contents of the memory are safe.
TFT_Invert_mode	Invert display colors
TFT_Display_on_mode	Turn Display on
TFT_Display_off_mode	In this mode, both VDD and VDDI are removed.

◆ TFT_PCBtype_e

enum ST7735_TFT::TFT_PCBtype_e : uint8_t

TFT type type of PCB

Enumerator
TFT_ST7735R_Red	ST7735R Red Tab
TFT_ST7735R_Green	ST7735R Green Tab
TFT_ST7735S_Black	ST7735S Black Tab
TFT_ST7735B	ST7735B controller

Member Function Documentation

◆ HighFreqDelayGet()

uint16_t ST7735_TFT::HighFreqDelayGet ( void )

Freq delay used in SW SPI getter, uS delay used in SW SPI method.

Returns: The GPIO communications delay in uS

◆ HighFreqDelaySet()

void ST7735_TFT::HighFreqDelaySet ( uint16_t CommDelay )

Freq delay used in SW SPI setter, uS delay used in SW SPI method.

Parameters

CommDelay The GPIO communications delay in uS

◆ setAddrWindow()

void ST7735_TFT::setAddrWindow	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1
	)

overridevirtual

SPI displays set an address window rectangle for blitting pixels.

Parameters

x0	Top left corner x coordinate
y0	Top left corner y coordinate
x1	Width of window
y1	Height of window

Note: virtual function overloads graphics library

Implements color16_graphics.

◆ TFTBlackTabInitialize()

rdlib::Return_Codes_e ST7735_TFT::TFTBlackTabInitialize ( void )

private

Init Routine ST7735R Black Tab (ST7735S)

Returns

a rdlib::Return_Codes_e code

rdlib::Success
upstream error code from TFTSPIinit()

◆ TFTchangeInvertMode()

void ST7735_TFT::TFTchangeInvertMode ( bool invertModeOn )

Toggle the invert mode.

Parameters

invertModeOn true invert on false invert off

◆ TFTchangeMode()

void ST7735_TFT::TFTchangeMode ( TFT_modes_e mode )

This changes the mode of the display as:

Parameters

mode

enum TFT_mode value

TFT_Normal_mode: Normal mode.
TFT_Partial_mode: Enable partial mode to work in portions of display
TFT_Idle_mode: Idle_mode consume less current and shows less color
TFT_Sleep_mode: Put display driver section in sleep but rest of the logic works.
TFT_Invert_mode: invert the display
TFT_Display_on_mode: Turn on display
TFT_Display_off_mode: Turn off display

◆ TFTClock_Data_ChipSelect_Pins()

rdlib::Return_Codes_e ST7735_TFT::TFTClock_Data_ChipSelect_Pins ( void )

private

Method for Clock, data and chip select pin setup routine for software SPI.

Returns

a rdlib::Return_Codes_e code

◆ TFTDataCommandPin()

rdlib::Return_Codes_e ST7735_TFT::TFTDataCommandPin ( void )

private

Method for Data or Command pin setup.

Returns

a rdlib::Return_Codes_e code

◆ TFTGreenTabInitialize()

rdlib::Return_Codes_e ST7735_TFT::TFTGreenTabInitialize ( void )

private

init sub-routine ST7735R Green Tab

Returns

a rdlib::Return_Codes_e code

rdlib::Success
upstream error code from TFTSPIinit()

◆ TFTInitPCBType() [1/2]

rdlib::Return_Codes_e ST7735_TFT::TFTInitPCBType	(	TFT_PCBtype_e	pcbType,
		int	device,
		int	channel,
		int	speed,
		int	flags,
		int	gpioDev
	)

intialise PCBtype and SPI, Hardware SPI

Parameters

pcbType	4 choices 0-3
device	A SPI device, >= 0.
channel	A SPI channel, >= 0.
speed	The speed of serial communication in bits per second.
flags	The flags may be used to modify the default behaviour. Set to 0(mode 0) for this device.
gpioDev	The device number of a gpiochip.

Returns

rdlib::Success = success
rdlib::WrongInputPCBType see enum choices.
Various other failures modes from upstream functions TFT*Initialize()

Note: overloaded 2 off, 1 for HW SPI , 1 for SW SPI

◆ TFTInitPCBType() [2/2]

rdlib::Return_Codes_e ST7735_TFT::TFTInitPCBType	(	TFT_PCBtype_e	pcbType,
		uint16_t	CommDelay,
		int	gpioDev
	)

intialise PCBtype and SPI, Software SPI

Parameters

pcbType	4 choices 0-3
CommDelay	uS GPIO delay used in software SPI
gpioDev	The device number of a gpiochip.

Returns

rdlib::Success = success
rdlib::WrongInputPCBType see enum choices.
Various other failures modes from upstream functions TFT*Initialize()

Note: overloaded 2 off, 1 for HW SPI , 1 for SW SPI

◆ TFTInitScreenSize()

void ST7735_TFT::TFTInitScreenSize	(	uint8_t	colOffset,
		uint8_t	rowOffset,
		uint16_t	width_TFT,
		uint16_t	height_TFT
	)

initialise the variables that define the size of the screen

Parameters

colOffset	Column offset
rowOffset	row offset
width_TFT	width in pixels
height_TFT	height in pixels

Note: The offsets can be adjusted for any issues with manufacture tolerance/defects

◆ TFTPowerDown()

rdlib::Return_Codes_e ST7735_TFT::TFTPowerDown ( void )

Call when powering down TFT.

Returns

Note: Turns off Display Sets GPIO low and turns off SPI

◆ TFTRedTabInitialize()

rdlib::Return_Codes_e ST7735_TFT::TFTRedTabInitialize ( void )

private

ST7735R Red Tab Init Red PCB version.

Returns

a rdlib::Return_Codes_e code

rdlib::Success
upstream error code from TFTSPIinit()

◆ TFTResetPin()

rdlib::Return_Codes_e ST7735_TFT::TFTResetPin ( void )

Method for Hardware Reset pin control.

Returns

a rdlib::Return_Codes_e code

< Reset delay in mS

◆ TFTsetRotation()

void ST7735_TFT::TFTsetRotation ( display_rotate_e mode )

: change rotation of display.

Parameters

mode	TFT_rotate_e enum 0 = Normal 1= 90 rotate 2 = 180 rotate 3 = 270 rotate

Note: if on your display colors are wrong after rotate change you may have chosen wrong display pcb type.

◆ TFTsetScrollDefinition()

void ST7735_TFT::TFTsetScrollDefinition	(	uint8_t	top_fix_heightTFT,
		uint8_t	bottom_fix_heightTFT,
		bool	_scroll_direction
	)

This method defines the Vertical Scrolling Area of the display where:

Parameters

top_fix_heightTFT	describes the Top Fixed Area,
bottom_fix_heightTFT	describes the Bottom Fixed Area and
_scroll_direction	is scroll direction (0 for top to bottom and 1 for bottom to top).

◆ TFTSetupGPIO() [1/2]

void ST7735_TFT::TFTSetupGPIO	(	int8_t	rst,
		int8_t	dc
	)

sets up TFT GPIO for Hardware SPi

Parameters

rst	reset GPIO
dc	data or command GPIO.

Note: overloaded 2 off, 1 for HW SPI , 1 for SW SPI

◆ TFTSetupGPIO() [2/2]

void ST7735_TFT::TFTSetupGPIO	(	int8_t	rst,
		int8_t	dc,
		int8_t	cs,
		int8_t	sclk,
		int8_t	din
	)

sets up TFT GPIO for software SPI

Parameters

rst	reset GPIO
dc	data or command GPIO.
cs	chip select GPIO
sclk	Data clock GPIO
din	Data to TFT GPIO

Note: overloaded 2 off, 1 for HW SPI , 1 for SW SPI

◆ TFTSPIInit()

rdlib::Return_Codes_e ST7735_TFT::TFTSPIInit ( void )

private

init the SPI

Returns: rdlib::Success rdlib::GpioPinClaim rdlib::SPIOpenFailure rdlib::GpioChipDevice;

◆ TFTST7735BInitialize()

rdlib::Return_Codes_e ST7735_TFT::TFTST7735BInitialize ( void )

private

init routine for ST7735B controller

Returns

a rdlib::Return_Codes_e code

rdlib::Success
upstream error code from TFTSPIinit()

◆ TFTVerticalScroll()

void ST7735_TFT::TFTVerticalScroll ( uint8_t vsp )

: This method is used together with the TFTsetScrollDefinition.

Parameters

vsp	scrolling mode

Member Data Documentation

◆ _colstart

uint8_t ST7735_TFT::_colstart

private

Used to offset column in the event of defect at edge of screen

◆ _heightStartTFT

uint16_t ST7735_TFT::_heightStartTFT

private

never change after first init

◆ _rowstart

uint8_t ST7735_TFT::_rowstart

private

Used to offset row in the event of defect at edge of screen

◆ _spiBaud

int ST7735_TFT::_spiBaud = 50000

private

The speed of serial communication in bits per second.

◆ _spiChan

int ST7735_TFT::_spiChan = 0

private

A SPI channel, >= 0.

◆ _spiDev

int ST7735_TFT::_spiDev = 0

private

A SPI device, >= 0.

◆ _spiFlags

int ST7735_TFT::_spiFlags = 0

private

The flags 2 LSB defines SPI mode

◆ _widthStartTFT

uint16_t ST7735_TFT::_widthStartTFT

private

never change after first init

◆ displayRotate

display_rotate_e ST7735_TFT::displayRotate = Degrees_0

Enum to hold rotation

◆ ST7735_CASET

constexpr uint8_t ST7735_TFT::ST7735_CASET = 0x2A

staticconstexprprivate

Column address set

◆ ST7735_COLMOD

constexpr uint8_t ST7735_TFT::ST7735_COLMOD = 0x3A

staticconstexprprivate

Interface Pixel Format

◆ ST7735_DISPOFF

constexpr uint8_t ST7735_TFT::ST7735_DISPOFF = 0x28

staticconstexprprivate

Display off

◆ ST7735_DISPON

constexpr uint8_t ST7735_TFT::ST7735_DISPON = 0x29

staticconstexprprivate

Display on

◆ ST7735_DISSET5

constexpr uint8_t ST7735_TFT::ST7735_DISSET5 = 0xB6

staticconstexprprivate

Display Function set

◆ ST7735_FRMCTR1

constexpr uint8_t ST7735_TFT::ST7735_FRMCTR1 = 0xB1

staticconstexprprivate

Normal

◆ ST7735_FRMCTR2

constexpr uint8_t ST7735_TFT::ST7735_FRMCTR2 = 0xB2

staticconstexprprivate

idle

◆ ST7735_FRMCTR3

constexpr uint8_t ST7735_TFT::ST7735_FRMCTR3 = 0xB3

staticconstexprprivate

Partial

◆ ST7735_GMCTRN1

constexpr uint8_t ST7735_TFT::ST7735_GMCTRN1 = 0xE1

staticconstexprprivate

Negative Gamma Correction Setting

◆ ST7735_GMCTRP1

constexpr uint8_t ST7735_TFT::ST7735_GMCTRP1 = 0xE0

staticconstexprprivate

Positive Gamma Correction Setting

◆ ST7735_INVCTR

constexpr uint8_t ST7735_TFT::ST7735_INVCTR = 0xB4

staticconstexprprivate

Display Inversion control

◆ ST7735_INVOFF

constexpr uint8_t ST7735_TFT::ST7735_INVOFF = 0x20

staticconstexprprivate

Display invert off

◆ ST7735_INVON

constexpr uint8_t ST7735_TFT::ST7735_INVON = 0x21

staticconstexprprivate

Display Invert on

◆ ST7735_MADCTL

constexpr uint8_t ST7735_TFT::ST7735_MADCTL = 0x36

staticconstexprprivate

Memory Access Control

◆ ST7735_MADCTL_BGR

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_BGR = 0x08

staticconstexprprivate

BGR order

◆ ST7735_MADCTL_MH

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_MH = 0x04

staticconstexprprivate

Horizontal Refresh Order

◆ ST7735_MADCTL_ML

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_ML = 0x10

staticconstexprprivate

Vertical Refresh Order

◆ ST7735_MADCTL_MV

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_MV = 0x20

staticconstexprprivate

Row/Column Order (MV)

◆ ST7735_MADCTL_MX

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_MX = 0x40

staticconstexprprivate

Column Address Order

◆ ST7735_MADCTL_MY

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_MY = 0x80

staticconstexprprivate

Row Address Order

◆ ST7735_MADCTL_RGB

constexpr uint8_t ST7735_TFT::ST7735_MADCTL_RGB = 0x00

staticconstexprprivate

RGB order

◆ ST7735_NOP

constexpr uint8_t ST7735_TFT::ST7735_NOP = 0x00

staticconstexprprivate

Non operation

◆ ST7735_NORON

constexpr uint8_t ST7735_TFT::ST7735_NORON = 0x13

staticconstexprprivate

Normal Display

◆ ST7735_PTLAR

constexpr uint8_t ST7735_TFT::ST7735_PTLAR = 0x30

staticconstexprprivate

Partial Area

◆ ST7735_PTLON

constexpr uint8_t ST7735_TFT::ST7735_PTLON = 0x12

staticconstexprprivate

Partial mode

◆ ST7735_PWCTR1

constexpr uint8_t ST7735_TFT::ST7735_PWCTR1 = 0xC0

staticconstexprprivate

Power_Control VRH: Set the GVDD voltage

◆ ST7735_PWCTR2

constexpr uint8_t ST7735_TFT::ST7735_PWCTR2 = 0xC1

staticconstexprprivate

Power_Control BT: set VGH/ VGL voltage

◆ ST7735_PWCTR3

constexpr uint8_t ST7735_TFT::ST7735_PWCTR3 = 0xC2

staticconstexprprivate

Power_Control APA: adjust op amp & DCA: boost Voltage

◆ ST7735_PWCTR4

constexpr uint8_t ST7735_TFT::ST7735_PWCTR4 = 0xC3

staticconstexprprivate

Power_Control APB: adjust op amp & DCB: boost Voltage

◆ ST7735_PWCTR5

constexpr uint8_t ST7735_TFT::ST7735_PWCTR5 = 0xC4

staticconstexprprivate

Power_Control APC: adjust op amp & DCC: boost Voltage

◆ ST7735_PWCTR6

constexpr uint8_t ST7735_TFT::ST7735_PWCTR6 = 0xFC

staticconstexprprivate

Power_Control In partial mode + Idle

◆ ST7735_RAMRD

constexpr uint8_t ST7735_TFT::ST7735_RAMRD = 0x2E

staticconstexprprivate

Memory read

◆ ST7735_RAMWR

constexpr uint8_t ST7735_TFT::ST7735_RAMWR = 0x2C

staticconstexprprivate

Memory write

◆ ST7735_RASET

constexpr uint8_t ST7735_TFT::ST7735_RASET = 0x2B

staticconstexprprivate

Page address set

◆ ST7735_RDDID

constexpr uint8_t ST7735_TFT::ST7735_RDDID = 0x04

staticconstexprprivate

Read Display ID

◆ ST7735_RDDST

constexpr uint8_t ST7735_TFT::ST7735_RDDST = 0x09

staticconstexprprivate

Read Display Status

◆ ST7735_RDID1

constexpr uint8_t ST7735_TFT::ST7735_RDID1 = 0xDA

staticconstexprprivate

read ID1

◆ ST7735_RDID2

constexpr uint8_t ST7735_TFT::ST7735_RDID2 = 0xDB

staticconstexprprivate

read ID2

◆ ST7735_RDID3

constexpr uint8_t ST7735_TFT::ST7735_RDID3 = 0xDC

staticconstexprprivate

read ID3

◆ ST7735_RDID4

constexpr uint8_t ST7735_TFT::ST7735_RDID4 = 0xDD

staticconstexprprivate

read ID4

◆ ST7735_SLPIN

constexpr uint8_t ST7735_TFT::ST7735_SLPIN = 0x10

staticconstexprprivate

Sleep ON

◆ ST7735_SLPOUT

constexpr uint8_t ST7735_TFT::ST7735_SLPOUT = 0x11

staticconstexprprivate

Sleep OFF

◆ ST7735_SWRESET

constexpr uint8_t ST7735_TFT::ST7735_SWRESET = 0x01

staticconstexprprivate

Soft Reset

◆ ST7735_TFT_Idle_modeOF

constexpr uint8_t ST7735_TFT::ST7735_TFT_Idle_modeOF = 0x38

staticconstexprprivate

Idle Mode OFF

◆ ST7735_TFT_Idle_modeON

constexpr uint8_t ST7735_TFT::ST7735_TFT_Idle_modeON = 0x39

staticconstexprprivate

Idle Mode ON

◆ ST7735_VMCTR1

constexpr uint8_t ST7735_TFT::ST7735_VMCTR1 = 0xC5

staticconstexprprivate

VCOM_Control 1

◆ ST7735_VSCRDEF

constexpr uint8_t ST7735_TFT::ST7735_VSCRDEF = 0x33

staticconstexprprivate

Vertical scroll def

◆ ST7735_VSCRSADD

constexpr uint8_t ST7735_TFT::ST7735_VSCRSADD = 0x37

staticconstexprprivate

Vertical Access Control

◆ TFT_mode

TFT_modes_e ST7735_TFT::TFT_mode

Enum to hold display mode

◆ TFT_PCBtype

TFT_PCBtype_e ST7735_TFT::TFT_PCBtype

Enum to hold TFT type

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

Public Types

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ TFT_modes_e

◆ TFT_PCBtype_e

Member Function Documentation

◆ HighFreqDelayGet()

◆ HighFreqDelaySet()

◆ setAddrWindow()

◆ TFTBlackTabInitialize()

◆ TFTchangeInvertMode()

◆ TFTchangeMode()

◆ TFTClock_Data_ChipSelect_Pins()

◆ TFTDataCommandPin()

◆ TFTGreenTabInitialize()

◆ TFTInitPCBType() [1/2]

◆ TFTInitPCBType() [2/2]

◆ TFTInitScreenSize()

◆ TFTPowerDown()

◆ TFTRedTabInitialize()

◆ TFTResetPin()

◆ TFTsetRotation()

◆ TFTsetScrollDefinition()

◆ TFTSetupGPIO() [1/2]

◆ TFTSetupGPIO() [2/2]

◆ TFTSPIInit()

◆ TFTST7735BInitialize()

◆ TFTVerticalScroll()

Member Data Documentation

◆ _colstart

◆ _heightStartTFT

◆ _rowstart

◆ _spiBaud

◆ _spiChan

◆ _spiDev

◆ _spiFlags

◆ _widthStartTFT

◆ displayRotate

◆ ST7735_CASET

◆ ST7735_COLMOD

◆ ST7735_DISPOFF

◆ ST7735_DISPON

◆ ST7735_DISSET5

◆ ST7735_FRMCTR1

◆ ST7735_FRMCTR2

◆ ST7735_FRMCTR3

◆ ST7735_GMCTRN1

◆ ST7735_GMCTRP1

◆ ST7735_INVCTR

◆ ST7735_INVOFF

◆ ST7735_INVON

◆ ST7735_MADCTL

◆ ST7735_MADCTL_BGR

◆ ST7735_MADCTL_MH

◆ ST7735_MADCTL_ML

◆ ST7735_MADCTL_MV

◆ ST7735_MADCTL_MX

◆ ST7735_MADCTL_MY

◆ ST7735_MADCTL_RGB

◆ ST7735_NOP

◆ ST7735_NORON

◆ ST7735_PTLAR

◆ ST7735_PTLON

◆ ST7735_PWCTR1

◆ ST7735_PWCTR2

◆ ST7735_PWCTR3

◆ ST7735_PWCTR4

◆ ST7735_PWCTR5

◆ ST7735_PWCTR6

◆ ST7735_RAMRD

◆ ST7735_RAMWR

◆ ST7735_RASET

◆ ST7735_RDDID

◆ ST7735_RDDST