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TFT_eSPI.h
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TFT_eSPI.h
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/***************************************************
Arduino TFT graphics library targeted at ESP8266
and ESP32 based boards.
This is a standalone library that contains the
hardware driver, the graphics functions and the
proportional fonts.
The built-in fonts 4, 6, 7 and 8 are Run Length
Encoded (RLE) to reduce the FLASH footprint.
Last review/edit by Bodmer: 26/01/20
****************************************************/
// Stop fonts etc being loaded multiple times
#ifndef _TFT_eSPIH_
#define _TFT_eSPIH_
#define TFT_ESPI_VERSION "2.0.2"
/***************************************************************************************
** Section 1: Load required header files
***************************************************************************************/
//Standard support
#include <Arduino.h>
#include <Print.h>
#include <SPI.h>
/***************************************************************************************
** Section 2: Load library and processor specific header files
***************************************************************************************/
// Include header file that defines the fonts loaded, the TFT drivers
// available and the pins to be used, etc, etc
#include <User_Setup_Select.h>
// Handle FLASH based storage e.g. PROGMEM
#ifdef __AVR__
#include <avr/pgmspace.h>
#elif defined(ESP8266) || defined(ESP32)
#include <pgmspace.h>
#else
#define PROGMEM
#endif
// Include the processor specific drivers
#if defined (ESP32)
#include "Processors/TFT_eSPI_ESP32.h"
#elif defined (ESP8266)
#include "Processors/TFT_eSPI_ESP8266.h"
#elif defined (STM32)
#include "Processors/TFT_eSPI_STM32.h"
#else
#include "Processors/TFT_eSPI_Generic.h"
#endif
/***************************************************************************************
** Section 3: Interface setup
***************************************************************************************/
#ifndef TAB_COLOUR
#define TAB_COLOUR 0
#endif
// If the SPI frequency is not defined, set a default
#ifndef SPI_FREQUENCY
#define SPI_FREQUENCY 20000000
#endif
// If the SPI read frequency is not defined, set a default
#ifndef SPI_READ_FREQUENCY
#define SPI_READ_FREQUENCY 10000000
#endif
// Some ST7789 boards do not work with Mode 0
#if defined(ST7789_DRIVER) || defined(ST7789_2_DRIVER)
#define TFT_SPI_MODE SPI_MODE3
#else
#define TFT_SPI_MODE SPI_MODE0
#endif
// If the XPT2046 SPI frequency is not defined, set a default
#ifndef SPI_TOUCH_FREQUENCY
#define SPI_TOUCH_FREQUENCY 2500000
#endif
/***************************************************************************************
** Section 4: Setup fonts
***************************************************************************************/
// Use GLCD font in error case where user requests a smooth font file
// that does not exist (this is a temporary fix to stop ESP32 reboot)
#ifdef SMOOTH_FONT
#ifndef LOAD_GLCD
#define LOAD_GLCD
#endif
#endif
// Only load the fonts defined in User_Setup.h (to save space)
// Set flag so RLE rendering code is optionally compiled
#ifdef LOAD_GLCD
#include <Fonts/glcdfont.c>
#endif
#ifdef LOAD_FONT2
#include <Fonts/Font16.h>
#endif
#ifdef LOAD_FONT4
#include <Fonts/Font32rle.h>
#define LOAD_RLE
#endif
#ifdef LOAD_FONT6
#include <Fonts/Font64rle.h>
#ifndef LOAD_RLE
#define LOAD_RLE
#endif
#endif
#ifdef LOAD_FONT7
#include <Fonts/Font7srle.h>
#ifndef LOAD_RLE
#define LOAD_RLE
#endif
#endif
#ifdef LOAD_FONT8
#include <Fonts/Font72rle.h>
#ifndef LOAD_RLE
#define LOAD_RLE
#endif
#elif defined LOAD_FONT8N // Optional narrower version
#define LOAD_FONT8
#include <Fonts/Font72x53rle.h>
#ifndef LOAD_RLE
#define LOAD_RLE
#endif
#endif
#ifdef LOAD_GFXFF
// We can include all the free fonts and they will only be built into
// the sketch if they are used
#include <Fonts/GFXFF/gfxfont.h>
// Call up any user custom fonts
#include <User_Setups/User_Custom_Fonts.h>
#endif // #ifdef LOAD_GFXFF
// Create a null default font in case some fonts not used (to prevent crash)
const uint8_t widtbl_null[1] = {0};
PROGMEM const uint8_t chr_null[1] = {0};
PROGMEM const uint8_t* const chrtbl_null[1] = {chr_null};
// This is a structure to conveniently hold information on the default fonts
// Stores pointer to font character image address table, width table and height
typedef struct {
const uint8_t *chartbl;
const uint8_t *widthtbl;
uint8_t height;
uint8_t baseline;
} fontinfo;
// Now fill the structure
const PROGMEM fontinfo fontdata [] = {
#ifdef LOAD_GLCD
{ (const uint8_t *)font, widtbl_null, 0, 0 },
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#endif
// GLCD font (Font 1) does not have all parameters
{ (const uint8_t *)chrtbl_null, widtbl_null, 8, 7 },
#ifdef LOAD_FONT2
{ (const uint8_t *)chrtbl_f16, widtbl_f16, chr_hgt_f16, baseline_f16},
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#endif
// Font 3 current unused
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#ifdef LOAD_FONT4
{ (const uint8_t *)chrtbl_f32, widtbl_f32, chr_hgt_f32, baseline_f32},
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#endif
// Font 5 current unused
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#ifdef LOAD_FONT6
{ (const uint8_t *)chrtbl_f64, widtbl_f64, chr_hgt_f64, baseline_f64},
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#endif
#ifdef LOAD_FONT7
{ (const uint8_t *)chrtbl_f7s, widtbl_f7s, chr_hgt_f7s, baseline_f7s},
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 },
#endif
#ifdef LOAD_FONT8
{ (const uint8_t *)chrtbl_f72, widtbl_f72, chr_hgt_f72, baseline_f72}
#else
{ (const uint8_t *)chrtbl_null, widtbl_null, 0, 0 }
#endif
};
/***************************************************************************************
** Section 5: Font datum enumeration
***************************************************************************************/
//These enumerate the text plotting alignment (reference datum point)
#define TL_DATUM 0 // Top left (default)
#define TC_DATUM 1 // Top centre
#define TR_DATUM 2 // Top right
#define ML_DATUM 3 // Middle left
#define CL_DATUM 3 // Centre left, same as above
#define MC_DATUM 4 // Middle centre
#define CC_DATUM 4 // Centre centre, same as above
#define MR_DATUM 5 // Middle right
#define CR_DATUM 5 // Centre right, same as above
#define BL_DATUM 6 // Bottom left
#define BC_DATUM 7 // Bottom centre
#define BR_DATUM 8 // Bottom right
#define L_BASELINE 9 // Left character baseline (Line the 'A' character would sit on)
#define C_BASELINE 10 // Centre character baseline
#define R_BASELINE 11 // Right character baseline
/***************************************************************************************
** Section 6: Colour enumeration
***************************************************************************************/
// Default color definitions
#define TFT_BLACK 0x0000 /* 0, 0, 0 */
#define TFT_NAVY 0x000F /* 0, 0, 128 */
#define TFT_DARKGREEN 0x03E0 /* 0, 128, 0 */
#define TFT_DARKCYAN 0x03EF /* 0, 128, 128 */
#define TFT_MAROON 0x7800 /* 128, 0, 0 */
#define TFT_PURPLE 0x780F /* 128, 0, 128 */
#define TFT_OLIVE 0x7BE0 /* 128, 128, 0 */
#define TFT_LIGHTGREY 0xD69A /* 211, 211, 211 */
#define TFT_DARKGREY 0x7BEF /* 128, 128, 128 */
#define TFT_BLUE 0x001F /* 0, 0, 255 */
#define TFT_GREEN 0x07E0 /* 0, 255, 0 */
#define TFT_CYAN 0x07FF /* 0, 255, 255 */
#define TFT_RED 0xF800 /* 255, 0, 0 */
#define TFT_MAGENTA 0xF81F /* 255, 0, 255 */
#define TFT_YELLOW 0xFFE0 /* 255, 255, 0 */
#define TFT_WHITE 0xFFFF /* 255, 255, 255 */
#define TFT_ORANGE 0xFDA0 /* 255, 180, 0 */
#define TFT_GREENYELLOW 0xB7E0 /* 180, 255, 0 */
#define TFT_PINK 0xFE19 /* 255, 192, 203 */ //Lighter pink, was 0xFC9F
#define TFT_BROWN 0x9A60 /* 150, 75, 0 */
#define TFT_GOLD 0xFEA0 /* 255, 215, 0 */
#define TFT_SILVER 0xC618 /* 192, 192, 192 */
#define TFT_SKYBLUE 0x867D /* 135, 206, 235 */
#define TFT_VIOLET 0x915C /* 180, 46, 226 */
// Next is a special 16 bit colour value that encodes to 8 bits
// and will then decode back to the same 16 bit value.
// Convenient for 8 bit and 16 bit transparent sprites.
#define TFT_TRANSPARENT 0x0120 // This is actually a dark green
// Default palette for 4 bit colour sprites
static const uint16_t default_4bit_palette[] PROGMEM = {
TFT_BLACK, // 0 ^
TFT_BROWN, // 1 |
TFT_RED, // 2 |
TFT_ORANGE, // 3 |
TFT_YELLOW, // 4 Colours 0-9 follow the resistor colour code!
TFT_GREEN, // 5 |
TFT_BLUE, // 6 |
TFT_PURPLE, // 7 |
TFT_DARKGREY, // 8 |
TFT_WHITE, // 9 v
TFT_CYAN, // 10 Blue+green mix
TFT_MAGENTA, // 11 Blue+red mix
TFT_MAROON, // 12 Darker red colour
TFT_DARKGREEN,// 13 Darker green colour
TFT_NAVY, // 14 Darker blue colour
TFT_PINK // 15
};
/***************************************************************************************
** Section 7: Diagnostic support
***************************************************************************************/
// #define TFT_eSPI_DEBUG // Switch on debug support serial messages (not used yet)
// #define TFT_eSPI_FNx_DEBUG // Switch on debug support for function "x" (not used yet)
// This structure allows sketches to retrieve the user setup parameters at runtime
// by calling getSetup(), zero impact on code size unless used, mainly for diagnostics
typedef struct
{
String version = TFT_ESPI_VERSION;
int32_t esp; // Processor code
uint8_t trans; // SPI transaction supoort
uint8_t serial; // Serial (SPI) or parallel
uint8_t overlap; // ESP8266 overlap mode
#if defined (ESP32) // TODO: make generic for other processors
#if defined (USE_HSPI_PORT)
uint8_t port = HSPI;
#else
uint8_t port = VSPI;
#endif
#endif
uint16_t tft_driver; // Hexadecimal code
uint16_t tft_width; // Rotation 0 width and height
uint16_t tft_height;
uint8_t r0_x_offset; // Display offsets, not all used yet
uint8_t r0_y_offset;
uint8_t r1_x_offset;
uint8_t r1_y_offset;
uint8_t r2_x_offset;
uint8_t r2_y_offset;
uint8_t r3_x_offset;
uint8_t r3_y_offset;
int8_t pin_tft_mosi; // SPI pins
int8_t pin_tft_miso;
int8_t pin_tft_clk;
int8_t pin_tft_cs;
int8_t pin_tft_dc; // Control pins
int8_t pin_tft_rd;
int8_t pin_tft_wr;
int8_t pin_tft_rst;
int8_t pin_tft_d0; // Parallel port pins
int8_t pin_tft_d1;
int8_t pin_tft_d2;
int8_t pin_tft_d3;
int8_t pin_tft_d4;
int8_t pin_tft_d5;
int8_t pin_tft_d6;
int8_t pin_tft_d7;
int8_t pin_tch_cs; // Touch chip select pin
int16_t tft_spi_freq;// TFT write SPI frequency
int16_t tft_rd_freq; // TFT read SPI frequency
int16_t tch_spi_freq;// Touch controller read/write SPI frequency
} setup_t;
/***************************************************************************************
** Section 8: Class member and support functions
***************************************************************************************/
// Swap any type
template <typename T> static inline void
swap_coord(T& a, T& b) { T t = a; a = b; b = t; }
// Callback prototype for smooth font pixel colour read
typedef uint16_t (*getColorCallback)(uint16_t x, uint16_t y);
// Class functions and variables
class TFT_eSPI : public Print {
//--------------------------------------- public ------------------------------------//
public:
TFT_eSPI(int16_t _W = TFT_WIDTH, int16_t _H = TFT_HEIGHT);
// init() and begin() are equivalent, begin() included for backwards compatibility
// Sketch defined tab colour option is for ST7735 displays only
void init(uint8_t tc = TAB_COLOUR), begin(uint8_t tc = TAB_COLOUR);
// These are virtual so the TFT_eSprite class can override them with sprite specific functions
virtual void drawPixel(int32_t x, int32_t y, uint32_t color),
drawChar(int32_t x, int32_t y, uint16_t c, uint32_t color, uint32_t bg, uint8_t size),
drawLine(int32_t xs, int32_t ys, int32_t xe, int32_t ye, uint32_t color),
drawFastVLine(int32_t x, int32_t y, int32_t h, uint32_t color),
drawFastHLine(int32_t x, int32_t y, int32_t w, uint32_t color),
fillRect(int32_t x, int32_t y, int32_t w, int32_t h, uint32_t color);
virtual int16_t drawChar(uint16_t uniCode, int32_t x, int32_t y, uint8_t font),
drawChar(uint16_t uniCode, int32_t x, int32_t y),
height(void),
width(void);
void setRotation(uint8_t r); // Set the display image orientation to 0, 1, 2 or 3
uint8_t getRotation(void); // Read the current rotation
void invertDisplay(bool i); // Tell TFT to invert all displayed colours
// The TFT_eSprite class inherits the following functions (not all are useful to Sprite class
void setAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h), // Note: start coordinates + width and height
setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye); // Note: start + end coordinates
// Push (aka write pixel) colours to the TFT (use setAddrWindow() first)
void pushColor(uint16_t color),
pushColor(uint16_t color, uint32_t len), // Deprecated, use pushBlock()
pushColors(uint16_t *data, uint32_t len, bool swap = true), // With byte swap option
pushColors(uint8_t *data, uint32_t len); // Deprecated, use pushPixels()
// Write a solid block of a single colour
void pushBlock(uint16_t color, uint32_t len);
// Write a set of pixels stored in memory, use setSwapBytes(true/false) function to correct endianess
void pushPixels(const void * data_in, uint32_t len);
// Read the colour of a pixel at x,y and return value in 565 format
uint16_t readPixel(int32_t x, int32_t y);
// Support for half duplex (bi-directional SDA) SPI bus where MOSI must be switched to input
#ifdef TFT_SDA_READ
#if defined (TFT_eSPI_ENABLE_8_BIT_READ)
uint8_t tft_Read_8(void); // Read 8 bit value from TFT command register
#endif
void begin_SDA_Read(void); // Begin a read on a half duplex (bi-directional SDA) SPI bus - sets MOSI to input
void end_SDA_Read(void); // Restore MOSI to output
#endif
// Graphics drawing
void fillScreen(uint32_t color),
drawRect(int32_t x, int32_t y, int32_t w, int32_t h, uint32_t color),
drawRoundRect(int32_t x, int32_t y, int32_t w, int32_t h, int32_t radius, uint32_t color),
fillRoundRect(int32_t x, int32_t y, int32_t w, int32_t h, int32_t radius, uint32_t color);
void drawCircle(int32_t x, int32_t y, int32_t r, uint32_t color),
drawCircleHelper(int32_t x, int32_t y, int32_t r, uint8_t cornername, uint32_t color),
fillCircle(int32_t x, int32_t y, int32_t r, uint32_t color),
fillCircleHelper(int32_t x, int32_t y, int32_t r, uint8_t cornername, int32_t delta, uint32_t color),
drawEllipse(int16_t x, int16_t y, int32_t rx, int32_t ry, uint16_t color),
fillEllipse(int16_t x, int16_t y, int32_t rx, int32_t ry, uint16_t color),
// Corner 1 Corner 2 Corner 3
drawTriangle(int32_t x1,int32_t y1, int32_t x2,int32_t y2, int32_t x3,int32_t y3, uint32_t color),
fillTriangle(int32_t x1,int32_t y1, int32_t x2,int32_t y2, int32_t x3,int32_t y3, uint32_t color);
// Image rendering
// Swap the byte order for pushImage() and pushPixels() - corrects endianness
void setSwapBytes(bool swap);
bool getSwapBytes(void);
// Draw bitmap
void drawBitmap( int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t fgcolor),
drawBitmap( int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t fgcolor, uint16_t bgcolor),
drawXBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t fgcolor),
drawXBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t fgcolor, uint16_t bgcolor),
setBitmapColor(uint16_t fgcolor, uint16_t bgcolor); // Define the 2 colours for 1bpp sprites
// Set TFT pivot point (use when rendering rotated sprites)
void setPivot(int16_t x, int16_t y);
int16_t getPivotX(void), // Get pivot x
getPivotY(void); // Get pivot y
// The next functions can be used as a pair to copy screen blocks (or horizontal/vertical lines) to another location
// Read a block of pixels to a data buffer, buffer is 16 bit and the size must be at least w * h
void readRect(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data);
// Write a block of pixels to the screen - this is a deprecated alternative to pushImage()
void pushRect(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data);
// These are used to render images or sprites stored in RAM arrays (used by Sprite class for 16bpp Sprites)
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data);
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data, uint16_t transparent);
// These are used to render images stored in FLASH (PROGMEM)
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, const uint16_t *data, uint16_t transparent);
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, const uint16_t *data);
// These are used by Sprite class pushSprite() member function for 1, 4 and 8 bits per pixel (bpp) colours
// They are not intended to be used with user sketches (but could be)
// Set bpp8 true for 8bpp sprites, false otherwise. The cmap pointer must be specified for 4bpp
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint8_t *data, bool bpp8 = true, uint16_t *cmap = nullptr);
void pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint8_t *data, uint8_t transparent, bool bpp8 = true, uint16_t *cmap = nullptr);
// This next function has been used successfully to dump the TFT screen to a PC for documentation purposes
// It reads a screen area and returns the 3 RGB 8 bit colour values of each pixel in the buffer
// Set w and h to 1 to read 1 pixel's colour. The data buffer must be at least w * h * 3 bytes
void readRectRGB(int32_t x, int32_t y, int32_t w, int32_t h, uint8_t *data);
// Text rendering - value returned is the pixel width of the rendered text
int16_t drawNumber(long intNumber, int32_t x, int32_t y, uint8_t font), // Draw integer using specified font number
drawNumber(long intNumber, int32_t x, int32_t y), // Draw integer using current font
// Decimal is the number of decimal places to render
// Use with setTextDatum() to position values on TFT, and setTextPadding() to blank old displayed values
drawFloat(float floatNumber, uint8_t decimal, int32_t x, int32_t y, uint8_t font), // Draw float using specified font number
drawFloat(float floatNumber, uint8_t decimal, int32_t x, int32_t y), // Draw float using current font
// Handle char arrays
// Use with setTextDatum() to position string on TFT, and setTextPadding() to blank old displayed strings
drawString(const char *string, int32_t x, int32_t y, uint8_t font), // Draw string using specifed font number
drawString(const char *string, int32_t x, int32_t y), // Draw string using current font
drawString(const String& string, int32_t x, int32_t y, uint8_t font),// Draw string using specifed font number
drawString(const String& string, int32_t x, int32_t y), // Draw string using current font
drawCentreString(const char *string, int32_t x, int32_t y, uint8_t font), // Deprecated, use setTextDatum() and drawString()
drawRightString(const char *string, int32_t x, int32_t y, uint8_t font), // Deprecated, use setTextDatum() and drawString()
drawCentreString(const String& string, int32_t x, int32_t y, uint8_t font),// Deprecated, use setTextDatum() and drawString()
drawRightString(const String& string, int32_t x, int32_t y, uint8_t font); // Deprecated, use setTextDatum() and drawString()
// Text rendering and font handling support funtions
void setCursor(int16_t x, int16_t y), // Set cursor for tft.print()
setCursor(int16_t x, int16_t y, uint8_t font); // Set cursor and font number for tft.print()
int16_t getCursorX(void), // Read current cursor x position (moves with tft.print())
getCursorY(void); // Read current cursor y position
void setTextColor(uint16_t color), // Set character (glyph) color only (background not over-written)
setTextColor(uint16_t fgcolor, uint16_t bgcolor),// Set character (glyph) foreground and backgorund colour
setTextSize(uint8_t size); // Set character size multiplier (this increases pixel size)
void setTextWrap(bool wrapX, bool wrapY = false); // Turn on/off wrapping of text in TFT width and/or height
void setTextDatum(uint8_t datum); // Set text datum position (default is top left), see Section 6 above
uint8_t getTextDatum(void);
void setTextPadding(uint16_t x_width); // Set text padding (background blanking/over-write) width in pixels
#ifdef LOAD_GFXFF
void setFreeFont(const GFXfont *f = NULL), // Select the GFX Free Font
setTextFont(uint8_t font); // Set the font number to use in future
#else
void setFreeFont(uint8_t font), // Not used, historical fix to prevent an error
setTextFont(uint8_t font); // Set the font number to use in future
#endif
int16_t textWidth(const char *string, uint8_t font), // Returns pixel width of string in specified font
textWidth(const char *string), // Returns pixel width of string in current font
textWidth(const String& string, uint8_t font), // As above for String types
textWidth(const String& string),
fontHeight(int16_t font), // Returns pixel height of string in specified font
fontHeight(void); // Returns pixel width of string in current font
// Used by library and Smooth font class to extract Unicode point codes from a UTF8 encoded string
uint16_t decodeUTF8(uint8_t *buf, uint16_t *index, uint16_t remaining),
decodeUTF8(uint8_t c);
// Support function to UTF8 decode and draw characters piped through print stream
size_t write(uint8_t);
// Used by Smooth font class to fetch a pixel colour for the anti-aliasing
void setCallback(getColorCallback getCol);
uint16_t fontsLoaded(void); // Each bit in returned value represents a font type that is loaded - used for debug/error handling only
// Low level read/write
void spiwrite(uint8_t); // legacy support only
void writecommand(uint8_t c), // Send a command, function resets DC/RS high ready for data
writedata(uint8_t d); // Send data with DC/RS set high
void commandList(const uint8_t *addr); // Send a initialisation sequence to TFT stored in FLASH
uint8_t readcommand8( uint8_t cmd_function, uint8_t index = 0); // read 8 bits from TFT
uint16_t readcommand16(uint8_t cmd_function, uint8_t index = 0); // read 16 bits from TFT
uint32_t readcommand32(uint8_t cmd_function, uint8_t index = 0); // read 32 bits from TFT
// Colour conversion
// Convert 8 bit red, green and blue to 16 bits
uint16_t color565(uint8_t red, uint8_t green, uint8_t blue);
// Convert 8 bit colour to 16 bits
uint16_t color8to16(uint8_t color332);
// Convert 16 bit colour to 8 bits
uint8_t color16to8(uint16_t color565);
// Convert 16 bit colour to/from 24 bit, R+G+B concatenated into LS 24 bits
uint32_t color16to24(uint16_t color565);
uint32_t color24to16(uint32_t color888);
// Alpha blend 2 colours, see generic "alphaBlend_Test" example
// alpha = 0 = 100% background colour
// alpha = 255 = 100% foreground colour
uint16_t alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc);
// 16 bit colour alphaBlend with alpha dither (dither reduces colour banding)
uint16_t alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc, uint8_t dither);
// 24 bit colour alphaBlend with optional alpha dither
uint32_t alphaBlend24(uint8_t alpha, uint32_t fgc, uint32_t bgc, uint8_t dither = 0);
// DMA support functions - these are currently just for SPI writes whe using the STM32 processors
// Bear in mind DMA will only be of benefit in particular circumstances and can be tricky
// to manage by noobs. The functions have however been designed to be noob friendly and
// avoid a few DMA behaviour "gotchas".
//
// At best you will get a 2x TFT rendering performance improvement when using DMA because
// this library handles the SPI bus so efficiently during normal (non DMA) transfers. The best
// performance improvement scenario is the DMA transfer time is exactly the same as the time it
// takes for the processor to prepare the next image buffer and initiate another DMA transfer.
//
// DMA transfer to the TFT is done while the processor moves on to handle other tasks. Bear
// this in mind and watch out for "gotchas" like the image buffer going out of scope as the
// processor leaves a function or its content being changed while the DMA engine is reading it.
//
// The compiler MAY change the implied scope of a buffer which has been set aside by creating
// and an array. For example a buffer defined before a "for-next" loop may get de-allocated when
// the loop ends. To avoid this use, for example, malloc() and free() to take control of when
// the buffer space is available and ensure it is not released until DMA is complete.
//
// Clearly you should not modify a buffer that is being DMA'ed to the TFT until the DMA is over.
// Use the dmaBusy() function to check this. Use tft.startWrite() before invoking DMA so the
// TFT chip select stays low. If you use tft.endWrite() before DMA is complete then the endWrite
// function will wait for the DMA to complete, so this may defeat any DMA performance benefit.
//
bool initDMA(void); // Initialise the DMA engine and attach to SPI bus - typically used in setup()
void deInitDMA(void); // De-initialise the DMA engine and detach from SPI bus - typically not used
// Push an image to the TFT using DMA, buffer is optional and grabs (double buffers) a copy of the image
// Use the buffer if the image data will get over-written or destroyed while DMA is in progress
// If swapping colour bytes is defined, and the double buffer option is NOT used then the bytes
// in the original data image will be swapped by the function before DMA is initiated.
// The function will wait for the last DMA to complete if it is called while a previous DMA is still
// in progress, this simplifies the sketch and helps avoid "gotchas".
void pushImageDMA(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t* data, uint16_t* buffer = nullptr);
// Push a block of pixels into a window set up using setAddrWindow()
void pushPixelsDMA(uint16_t* image, uint32_t len);
// Check if the DMA is complete - use while(tft.dmaBusy); for a blocking wait
bool dmaBusy(void);
bool DMA_Enabled = false; // Flag for DMA enabled state
// Bare metal functions
void startWrite(void); // Begin SPI transaction
void writeColor(uint16_t color, uint32_t len); // Deprecated, use pushBlock()
void endWrite(void); // End SPI transaction
// Set/get an arbitrary library configuration attribute or option
// Use to switch ON/OFF capabilities such as UTF8 decoding - each attribute has a unique ID
// id = 0: reserved - may be used in fuuture to reset all attributes to a default state
// id = 1: Turn on (a=true) or off (a=false) GLCD cp437 font character error correction
// id = 2: Turn on (a=true) or off (a=false) UTF8 decoding
#define CP437_SWITCH 1
#define UTF8_SWITCH 2
void setAttribute(uint8_t id = 0, uint8_t a = 0); // Set attribute value
uint8_t getAttribute(uint8_t id = 0); // Get attribute value
// Used for diagnostic sketch to see library setup adopted by compiler, see Section 7 above
void getSetup(setup_t& tft_settings); // Sketch provides the instance to populate
// Global variables
static SPIClass& getSPIinstance(void); // Get SPI class handle
int32_t cursor_x, cursor_y, padX; // Text cursor x,y and padding setting
uint32_t textcolor, textbgcolor; // Text foreground and background colours
uint32_t bitmap_fg, bitmap_bg; // Bitmap foreground (bit=1) and background (bit=0) colours
uint8_t textfont, // Current selected font number
textsize, // Current font size multiplier
textdatum, // Text reference datum
rotation; // Display rotation (0-3)
int16_t _xpivot; // TFT x pivot point coordinate for rotated Sprites
int16_t _ypivot; // TFT x pivot point coordinate for rotated Sprites
uint8_t decoderState = 0; // UTF8 decoder state - not for user access
uint16_t decoderBuffer; // Unicode code-point buffer - not for user access
//--------------------------------------- private ------------------------------------//
private:
// Legacy begin and end prototypes - deprecated TODO: delete
void spi_begin();
void spi_end();
void spi_begin_read();
void spi_end_read();
// New begin and end prototypes
// begin/end a TFT write transaction
// For SPI bus the transmit clock rate is set
inline void begin_tft_write() __attribute__((always_inline));
inline void end_tft_write() __attribute__((always_inline));
// begin/end a TFT read transaction
// For SPI bus: begin lowers SPI clock rate, end reinstates transmit clock rate
inline void begin_tft_read() __attribute__((always_inline));
inline void end_tft_read() __attribute__((always_inline));
// Temporary library development function TODO: remove need for this
void pushSwapBytePixels(const void* data_in, uint32_t len);
// Same as setAddrWindow but exits with CGRAM in read mode
void readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h);
// Byte read prototype
uint8_t readByte(void);
// GPIO parallel bus input/output direction control
void busDir(uint32_t mask, uint8_t mode);
// Single GPIO input/output direction control
void gpioMode(uint8_t gpio, uint8_t mode);
// Display variant settings
uint8_t tabcolor, // ST7735 screen protector "tab" colour (now invalid)
colstart = 0, rowstart = 0; // Screen display area to CGRAM area coordinate offsets
// Port and pin masks for control signals (ESP826 only) - TODO: remove need for this
volatile uint32_t *dcport, *csport;
uint32_t cspinmask, dcpinmask, wrpinmask, sclkpinmask;
#if defined(ESP32_PARALLEL)
// Bit masks for ESP32 parallel bus interface
uint32_t xclr_mask, xdir_mask; // Port set/clear and direction control masks
// Lookup table for ESP32 parallel bus interface uses 1kbyte RAM,
uint32_t xset_mask[256]; // Makes Sprite rendering test 33% faster, for slower macro equivalent
// see commented out #define set_mask(C) within TFT_eSPI_ESP32.h
#endif
//uint32_t lastColor = 0xFFFF; // Last colour - used to minimise bit shifting overhead
getColorCallback getColor = nullptr; // Smooth font callback function pointer
//-------------------------------------- protected ----------------------------------//
protected:
//int32_t win_xe, win_ye; // Window end coords - not needed
int32_t _init_width, _init_height; // Display w/h as input, used by setRotation()
int32_t _width, _height; // Display w/h as modified by current rotation
int32_t addr_row, addr_col; // Window position - used to minimise window commands
uint32_t fontsloaded; // Bit field of fonts loaded
uint8_t glyph_ab, // Smooth font glyph delta Y (height) above baseline
glyph_bb; // Smooth font glyph delta Y (height) below baseline
bool isDigits; // adjust bounding box for numbers to reduce visual jiggling
bool textwrapX, textwrapY; // If set, 'wrap' text at right and optionally bottom edge of display
bool _swapBytes; // Swap the byte order for TFT pushImage()
bool locked, inTransaction; // SPI transaction and mutex lock flags
bool _booted; // init() or begin() has already run once
// User sketch manages these via set/getAttribute()
bool _cp437; // If set, use correct CP437 charset (default is ON)
bool _utf8; // If set, use UTF-8 decoder in print stream 'write()' function (default ON)
uint32_t _lastColor; // Buffered value of last colour used
#ifdef LOAD_GFXFF
GFXfont *gfxFont;
#endif
/***************************************************************************************
** Section 9: TFT_eSPI class conditional extensions
***************************************************************************************/
// Load the Touch extension
#ifdef TOUCH_CS
#include "Extensions/Touch.h" // Loaded if TOUCH_CS is defined by user
#endif
// Load the Anti-aliased font extension
#ifdef SMOOTH_FONT
#include "Extensions/Smooth_font.h" // Loaded if SMOOTH_FONT is defined by user
#endif
}; // End of class TFT_eSPI
/***************************************************************************************
** Section 10: Additional extension classes
***************************************************************************************/
// Load the Button Class
#include "Extensions/Button.h"
// Load the Sprite Class
#include "Extensions/Sprite.h"
#endif // ends #ifndef _TFT_eSPIH_