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TFT_eSPI.cpp
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TFT_eSPI.cpp
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/***************************************************
Arduino TFT graphics library targeted at 32 bit
processors such as ESP32, ESP8266 and STM32.
This is a standalone library that contains the
hardware driver, the graphics functions and the
proportional fonts.
The larger fonts are Run Length Encoded to reduce their
size.
Created by Bodmer 2/12/16
Last update by Bodmer 20/03/20
****************************************************/
#include "TFT_eSPI.h"
#if defined (ESP32)
#include "Processors/TFT_eSPI_ESP32.c"
#elif defined (ESP8266)
#include "Processors/TFT_eSPI_ESP8266.c"
#elif defined (STM32) // (_VARIANT_ARDUINO_STM32_) stm32_def.h
#include "Processors/TFT_eSPI_STM32.c"
#else
#include "Processors/TFT_eSPI_Generic.c"
#endif
/***************************************************************************************
** Function name: begin_tft_write (was called spi_begin)
** Description: Start SPI transaction for writes and select TFT
***************************************************************************************/
inline void TFT_eSPI::begin_tft_write(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(TFT_PARALLEL_8_BIT)
if (locked) {
locked = false;
spi.beginTransaction(SPISettings(SPI_FREQUENCY, MSBFIRST, TFT_SPI_MODE));
CS_L;
}
#else
CS_L;
#endif
SET_BUS_WRITE_MODE;
}
/***************************************************************************************
** Function name: end_tft_write (was called spi_end)
** Description: End transaction for write and deselect TFT
***************************************************************************************/
inline void TFT_eSPI::end_tft_write(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(TFT_PARALLEL_8_BIT)
if(!inTransaction) {
if (!locked) {
locked = true;
CS_H;
spi.endTransaction();
}
}
SET_BUS_READ_MODE;
#else
if(!inTransaction) {CS_H;}
#endif
}
/***************************************************************************************
** Function name: begin_tft_read (was called spi_begin_read)
** Description: Start transaction for reads and select TFT
***************************************************************************************/
// Reads require a lower SPI clock rate than writes
inline void TFT_eSPI::begin_tft_read(void){
DMA_BUSY_CHECK; // Wait for any DMA transfer to complete before changing SPI settings
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(TFT_PARALLEL_8_BIT)
if (locked) {
locked = false;
spi.beginTransaction(SPISettings(SPI_READ_FREQUENCY, MSBFIRST, TFT_SPI_MODE));
CS_L;
}
#else
#if !defined(TFT_PARALLEL_8_BIT)
spi.setFrequency(SPI_READ_FREQUENCY);
#endif
CS_L;
#endif
SET_BUS_READ_MODE;
}
/***************************************************************************************
** Function name: end_tft_read (was called spi_end_read)
** Description: End transaction for reads and deselect TFT
***************************************************************************************/
inline void TFT_eSPI::end_tft_read(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(TFT_PARALLEL_8_BIT)
if(!inTransaction) {
if (!locked) {
locked = true;
CS_H;
spi.endTransaction();
}
}
#else
#if !defined(TFT_PARALLEL_8_BIT)
spi.setFrequency(SPI_FREQUENCY);
#endif
if(!inTransaction) {CS_H;}
#endif
SET_BUS_WRITE_MODE;
}
/***************************************************************************************
** Function name: Legacy - deprecated
** Description: Start/end transaction
***************************************************************************************/
void TFT_eSPI::spi_begin() {begin_tft_write();}
void TFT_eSPI::spi_end() { end_tft_write();}
void TFT_eSPI::spi_begin_read() {begin_tft_read(); }
void TFT_eSPI::spi_end_read() { end_tft_read(); }
/***************************************************************************************
** Function name: TFT_eSPI
** Description: Constructor , we must use hardware SPI pins
***************************************************************************************/
TFT_eSPI::TFT_eSPI(int16_t w, int16_t h)
{
// The control pins are deliberately set to the inactive state (CS high) as setup()
// might call and initialise other SPI peripherals which would could cause conflicts
// if CS is floating or undefined.
#ifdef TFT_CS
pinMode(TFT_CS, OUTPUT);
digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
#endif
// Configure chip select for touchscreen controller if present
#ifdef TOUCH_CS
pinMode(TOUCH_CS, OUTPUT);
digitalWrite(TOUCH_CS, HIGH); // Chip select high (inactive)
#endif
#ifdef TFT_WR
pinMode(TFT_WR, OUTPUT);
digitalWrite(TFT_WR, HIGH); // Set write strobe high (inactive)
#endif
#ifdef TFT_DC
pinMode(TFT_DC, OUTPUT);
digitalWrite(TFT_DC, HIGH); // Data/Command high = data mode
#endif
#ifdef TFT_RST
if (TFT_RST >= 0) {
pinMode(TFT_RST, OUTPUT);
digitalWrite(TFT_RST, HIGH); // Set high, do not share pin with another SPI device
}
#endif
#if defined (TFT_PARALLEL_8_BIT)
// Make sure read is high before we set the bus to output
pinMode(TFT_RD, OUTPUT);
digitalWrite(TFT_RD, HIGH);
// Set TFT data bus lines to output
pinMode(TFT_D0, OUTPUT); digitalWrite(TFT_D0, HIGH);
pinMode(TFT_D1, OUTPUT); digitalWrite(TFT_D1, HIGH);
pinMode(TFT_D2, OUTPUT); digitalWrite(TFT_D2, HIGH);
pinMode(TFT_D3, OUTPUT); digitalWrite(TFT_D3, HIGH);
pinMode(TFT_D4, OUTPUT); digitalWrite(TFT_D4, HIGH);
pinMode(TFT_D5, OUTPUT); digitalWrite(TFT_D5, HIGH);
pinMode(TFT_D6, OUTPUT); digitalWrite(TFT_D6, HIGH);
pinMode(TFT_D7, OUTPUT); digitalWrite(TFT_D7, HIGH);
CONSTRUCTOR_INIT_TFT_DATA_BUS;
#endif
_init_width = _width = w; // Set by specific xxxxx_Defines.h file or by users sketch
_init_height = _height = h; // Set by specific xxxxx_Defines.h file or by users sketch
rotation = 0;
cursor_y = cursor_x = 0;
textfont = 1;
textsize = 1;
textcolor = bitmap_fg = 0xFFFF; // White
textbgcolor = bitmap_bg = 0x0000; // Black
padX = 0; // No padding
isDigits = false; // No bounding box adjustment
textwrapX = true; // Wrap text at end of line when using print stream
textwrapY = false; // Wrap text at bottom of screen when using print stream
textdatum = TL_DATUM; // Top Left text alignment is default
fontsloaded = 0;
_swapBytes = false; // Do not swap colour bytes by default
locked = true; // Transaction mutex lock flags
inTransaction = false;
_booted = true; // Default attributes
_cp437 = true;
_utf8 = true;
#ifdef FONT_FS_AVAILABLE
fs_font = true; // Smooth font filing system or array (fs_font = false) flag
#endif
#if defined (ESP32) && defined (CONFIG_SPIRAM_SUPPORT)
if (psramFound()) _psram_enable = true; // Enable the use of PSRAM (if available)
else
#endif
_psram_enable = false;
addr_row = 0xFFFF;
addr_col = 0xFFFF;
_xpivot = 0;
_ypivot = 0;
cspinmask = 0;
dcpinmask = 0;
wrpinmask = 0;
sclkpinmask = 0;
#ifdef LOAD_GLCD
fontsloaded = 0x0002; // Bit 1 set
#endif
#ifdef LOAD_FONT2
fontsloaded |= 0x0004; // Bit 2 set
#endif
#ifdef LOAD_FONT4
fontsloaded |= 0x0010; // Bit 4 set
#endif
#ifdef LOAD_FONT6
fontsloaded |= 0x0040; // Bit 6 set
#endif
#ifdef LOAD_FONT7
fontsloaded |= 0x0080; // Bit 7 set
#endif
#ifdef LOAD_FONT8
fontsloaded |= 0x0100; // Bit 8 set
#endif
#ifdef LOAD_FONT8N
fontsloaded |= 0x0200; // Bit 9 set
#endif
#ifdef SMOOTH_FONT
fontsloaded |= 0x8000; // Bit 15 set
#endif
}
/***************************************************************************************
** Function name: begin
** Description: Included for backwards compatibility
***************************************************************************************/
void TFT_eSPI::begin(uint8_t tc)
{
init(tc);
}
/***************************************************************************************
** Function name: init (tc is tab colour for ST7735 displays only)
** Description: Reset, then initialise the TFT display registers
***************************************************************************************/
void TFT_eSPI::init(uint8_t tc)
{
if (_booted)
{
#if !defined (ESP32) && !defined(TFT_PARALLEL_8_BIT)
#if defined (TFT_CS) && (TFT_CS >= 0)
cspinmask = (uint32_t) digitalPinToBitMask(TFT_CS);
#endif
#if defined (TFT_DC) && (TFT_DC >= 0)
dcpinmask = (uint32_t) digitalPinToBitMask(TFT_DC);
#endif
#if defined (TFT_WR) && (TFT_WR >= 0)
wrpinmask = (uint32_t) digitalPinToBitMask(TFT_WR);
#endif
#if defined (TFT_SCLK) && (TFT_SCLK >= 0)
sclkpinmask = (uint32_t) digitalPinToBitMask(TFT_SCLK);
#endif
#if defined (TFT_SPI_OVERLAP) && defined (ESP8266)
// Overlap mode SD0=MISO, SD1=MOSI, CLK=SCLK must use D3 as CS
// pins(int8_t sck, int8_t miso, int8_t mosi, int8_t ss);
//spi.pins( 6, 7, 8, 0);
spi.pins(6, 7, 8, 0);
#endif
spi.begin(); // This will set HMISO to input
#else
#if !defined(TFT_PARALLEL_8_BIT)
#if defined (TFT_MOSI) && !defined (TFT_SPI_OVERLAP)
spi.begin(TFT_SCLK, TFT_MISO, TFT_MOSI, -1);
#else
spi.begin();
#endif
#endif
#endif
inTransaction = false;
locked = true;
INIT_TFT_DATA_BUS;
#ifdef TFT_CS
// Set to output once again in case D6 (MISO) is used for CS
pinMode(TFT_CS, OUTPUT);
digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
#elif defined (ESP8266) && !defined (TFT_PARALLEL_8_BIT)
spi.setHwCs(1); // Use hardware SS toggling
#endif
// Set to output once again in case D6 (MISO) is used for DC
#ifdef TFT_DC
pinMode(TFT_DC, OUTPUT);
digitalWrite(TFT_DC, HIGH); // Data/Command high = data mode
#endif
_booted = false;
end_tft_write();
} // end of: if just _booted
// Toggle RST low to reset
#ifdef TFT_RST
if (TFT_RST >= 0) {
digitalWrite(TFT_RST, HIGH);
delay(5);
digitalWrite(TFT_RST, LOW);
delay(20);
digitalWrite(TFT_RST, HIGH);
}
else writecommand(TFT_SWRST); // Software reset
#else
writecommand(TFT_SWRST); // Software reset
#endif
delay(150); // Wait for reset to complete
begin_tft_write();
tc = tc; // Supress warning
// This loads the driver specific initialisation code <<<<<<<<<<<<<<<<<<<<< ADD NEW DRIVERS TO THE LIST HERE <<<<<<<<<<<<<<<<<<<<<<<
#if defined (ILI9341_DRIVER)
#include "TFT_Drivers/ILI9341_Init.h"
#elif defined (ST7735_DRIVER)
tabcolor = tc;
#include "TFT_Drivers/ST7735_Init.h"
#elif defined (ILI9163_DRIVER)
#include "TFT_Drivers/ILI9163_Init.h"
#elif defined (S6D02A1_DRIVER)
#include "TFT_Drivers/S6D02A1_Init.h"
#elif defined (ST7796_DRIVER)
#include "TFT_Drivers/ST7796_Init.h"
#elif defined (ILI9486_DRIVER)
#include "TFT_Drivers/ILI9486_Init.h"
#elif defined (ILI9481_DRIVER)
#include "TFT_Drivers/ILI9481_Init.h"
#elif defined (ILI9488_DRIVER)
#include "TFT_Drivers/ILI9488_Init.h"
#elif defined (HX8357D_DRIVER)
#include "TFT_Drivers/HX8357D_Init.h"
#elif defined (ST7789_DRIVER)
#include "TFT_Drivers/ST7789_Init.h"
#elif defined (R61581_DRIVER)
#include "TFT_Drivers/R61581_Init.h"
#elif defined (RM68140_DRIVER)
#include "TFT_Drivers/RM68140_Init.h"
#elif defined (ST7789_2_DRIVER)
#include "TFT_Drivers/ST7789_2_Init.h"
#elif defined (SSD1963_480_DRIVER)
#include "TFT_Drivers/SSD1963_Init.h"
#elif defined (SSD1963_800_DRIVER)
#include "TFT_Drivers/SSD1963_Init.h"
#elif defined (SSD1963_800ALT_DRIVER)
#include "TFT_Drivers/SSD1963_Init.h"
#endif
#ifdef TFT_INVERSION_ON
writecommand(TFT_INVON);
#endif
#ifdef TFT_INVERSION_OFF
writecommand(TFT_INVOFF);
#endif
end_tft_write();
setRotation(rotation);
#if defined (TFT_BL) && defined (TFT_BACKLIGHT_ON)
pinMode(TFT_BL, OUTPUT);
digitalWrite(TFT_BL, TFT_BACKLIGHT_ON);
#else
#if defined (TFT_BL) && defined (M5STACK)
// Turn on the back-light LED
pinMode(TFT_BL, OUTPUT);
digitalWrite(TFT_BL, HIGH);
#endif
#endif
}
/***************************************************************************************
** Function name: setRotation
** Description: rotate the screen orientation m = 0-3 or 4-7 for BMP drawing
***************************************************************************************/
void TFT_eSPI::setRotation(uint8_t m)
{
begin_tft_write();
// This loads the driver specific rotation code <<<<<<<<<<<<<<<<<<<<< ADD NEW DRIVERS TO THE LIST HERE <<<<<<<<<<<<<<<<<<<<<<<
#if defined (ILI9341_DRIVER)
#include "TFT_Drivers/ILI9341_Rotation.h"
#elif defined (ST7735_DRIVER)
#include "TFT_Drivers/ST7735_Rotation.h"
#elif defined (ILI9163_DRIVER)
#include "TFT_Drivers/ILI9163_Rotation.h"
#elif defined (S6D02A1_DRIVER)
#include "TFT_Drivers/S6D02A1_Rotation.h"
#elif defined (ST7796_DRIVER)
#include "TFT_Drivers/ST7796_Rotation.h"
#elif defined (ILI9486_DRIVER)
#include "TFT_Drivers/ILI9486_Rotation.h"
#elif defined (ILI9481_DRIVER)
#include "TFT_Drivers/ILI9481_Rotation.h"
#elif defined (ILI9488_DRIVER)
#include "TFT_Drivers/ILI9488_Rotation.h"
#elif defined (HX8357D_DRIVER)
#include "TFT_Drivers/HX8357D_Rotation.h"
#elif defined (ST7789_DRIVER)
#include "TFT_Drivers/ST7789_Rotation.h"
#elif defined (R61581_DRIVER)
#include "TFT_Drivers/R61581_Rotation.h"
#elif defined (RM68140_DRIVER)
#include "TFT_Drivers/RM68140_Rotation.h"
#elif defined (ST7789_2_DRIVER)
#include "TFT_Drivers/ST7789_2_Rotation.h"
#endif
delayMicroseconds(10);
end_tft_write();
addr_row = 0xFFFF;
addr_col = 0xFFFF;
}
/***************************************************************************************
** Function name: commandList, used for FLASH based lists only (e.g. ST7735)
** Description: Get initialisation commands from FLASH and send to TFT
***************************************************************************************/
void TFT_eSPI::commandList (const uint8_t *addr)
{
uint8_t numCommands;
uint8_t numArgs;
uint8_t ms;
numCommands = pgm_read_byte(addr++); // Number of commands to follow
while (numCommands--) // For each command...
{
writecommand(pgm_read_byte(addr++)); // Read, issue command
numArgs = pgm_read_byte(addr++); // Number of args to follow
ms = numArgs & TFT_INIT_DELAY; // If hibit set, delay follows args
numArgs &= ~TFT_INIT_DELAY; // Mask out delay bit
while (numArgs--) // For each argument...
{
writedata(pgm_read_byte(addr++)); // Read, issue argument
}
if (ms)
{
ms = pgm_read_byte(addr++); // Read post-command delay time (ms)
delay( (ms==255 ? 500 : ms) );
}
}
}
/***************************************************************************************
** Function name: spiwrite
** Description: Write 8 bits to SPI port (legacy support only)
***************************************************************************************/
void TFT_eSPI::spiwrite(uint8_t c)
{
begin_tft_write();
tft_Write_8(c);
end_tft_write();
}
/***************************************************************************************
** Function name: writecommand
** Description: Send an 8 bit command to the TFT
***************************************************************************************/
void TFT_eSPI::writecommand(uint8_t c)
{
begin_tft_write();
DC_C;
tft_Write_8(c);
DC_D;
end_tft_write();
}
/***************************************************************************************
** Function name: writedata
** Description: Send a 8 bit data value to the TFT
***************************************************************************************/
void TFT_eSPI::writedata(uint8_t d)
{
begin_tft_write();
DC_D; // Play safe, but should already be in data mode
tft_Write_8(d);
CS_L; // Allow more hold time for low VDI rail
end_tft_write();
}
/***************************************************************************************
** Function name: readcommand8
** Description: Read a 8 bit data value from an indexed command register
***************************************************************************************/
uint8_t TFT_eSPI::readcommand8(uint8_t cmd_function, uint8_t index)
{
uint8_t reg = 0;
#ifdef TFT_PARALLEL_8_BIT
writecommand(cmd_function); // Sets DC and CS high
busDir(dir_mask, INPUT);
CS_L;
// Read nth parameter (assumes caller discards 1st parameter or points index to 2nd)
while(index--) reg = readByte();
busDir(dir_mask, OUTPUT);
CS_H;
#else // SPI interface
// Tested with ILI9341 set to Interface II i.e. IM [3:0] = "1101"
begin_tft_read();
index = 0x10 + (index & 0x0F);
DC_C; tft_Write_8(0xD9);
DC_D; tft_Write_8(index);
CS_H; // Some displays seem to need CS to be pulsed here, or is just a delay needed?
CS_L;
DC_C; tft_Write_8(cmd_function);
DC_D;
reg = tft_Read_8();
end_tft_read();
#endif
return reg;
}
/***************************************************************************************
** Function name: readcommand16
** Description: Read a 16 bit data value from an indexed command register
***************************************************************************************/
uint16_t TFT_eSPI::readcommand16(uint8_t cmd_function, uint8_t index)
{
uint32_t reg;
reg = (readcommand8(cmd_function, index + 0) << 8);
reg |= (readcommand8(cmd_function, index + 1) << 0);
return reg;
}
/***************************************************************************************
** Function name: readcommand32
** Description: Read a 32 bit data value from an indexed command register
***************************************************************************************/
uint32_t TFT_eSPI::readcommand32(uint8_t cmd_function, uint8_t index)
{
uint32_t reg;
reg = ((uint32_t)readcommand8(cmd_function, index + 0) << 24);
reg |= ((uint32_t)readcommand8(cmd_function, index + 1) << 16);
reg |= ((uint32_t)readcommand8(cmd_function, index + 2) << 8);
reg |= ((uint32_t)readcommand8(cmd_function, index + 3) << 0);
return reg;
}
/***************************************************************************************
** Function name: read pixel (for SPI Interface II i.e. IM [3:0] = "1101")
** Description: Read 565 pixel colours from a pixel
***************************************************************************************/
uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
{
#if defined(TFT_PARALLEL_8_BIT)
CS_L;
readAddrWindow(x0, y0, 1, 1);
// Set masked pins D0- D7 to input
busDir(dir_mask, INPUT);
// Dummy read to throw away don't care value
readByte();
// Fetch the 16 bit BRG pixel
//uint16_t rgb = (readByte() << 8) | readByte();
#if defined (ILI9341_DRIVER) | defined (ILI9488_DRIVER) // Read 3 bytes
// Read window pixel 24 bit RGB values and fill in LS bits
uint16_t rgb = ((readByte() & 0xF8) << 8) | ((readByte() & 0xFC) << 3) | (readByte() >> 3);
CS_H;
// Set masked pins D0- D7 to output
busDir(dir_mask, OUTPUT);
return rgb;
#else // ILI9481 or ILI9486 16 bit read
// Fetch the 16 bit BRG pixel
uint16_t bgr = (readByte() << 8) | readByte();
CS_H;
// Set masked pins D0- D7 to output
busDir(dir_mask, OUTPUT);
#ifdef ILI9486_DRIVER
return bgr;
#else
// Swap Red and Blue (could check MADCTL setting to see if this is needed)
return (bgr>>11) | (bgr<<11) | (bgr & 0x7E0);
#endif
#endif
#else // Not TFT_PARALLEL_8_BIT
// This function can get called during antialiased font rendering
// so a transaction may be in progress
bool wasInTransaction = inTransaction;
if (inTransaction) { inTransaction= false; end_tft_write();}
begin_tft_read();
readAddrWindow(x0, y0, 1, 1); // Sets CS low
#ifdef TFT_SDA_READ
begin_SDA_Read();
#endif
// Dummy read to throw away don't care value
tft_Read_8();
//#if !defined (ILI9488_DRIVER)
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
uint8_t r = tft_Read_8();
uint8_t g = tft_Read_8();
uint8_t b = tft_Read_8();
/*
#else
// The 6 colour bits are in MS 6 bits of each byte, but the ILI9488 needs an extra clock pulse
// so bits appear shifted right 1 bit, so mask the middle 6 bits then shift 1 place left
uint8_t r = (tft_Read_8()&0x7E)<<1;
uint8_t g = (tft_Read_8()&0x7E)<<1;
uint8_t b = (tft_Read_8()&0x7E)<<1;
#endif
*/
CS_H;
#ifdef TFT_SDA_READ
end_SDA_Read();
#endif
end_tft_read();
// Reinstate the transaction if one was in progress
if(wasInTransaction) { begin_tft_write(); inTransaction = true; }
return color565(r, g, b);
#endif
}
void TFT_eSPI::setCallback(getColorCallback getCol)
{
getColor = getCol;
}
/***************************************************************************************
** Function name: read rectangle (for SPI Interface II i.e. IM [3:0] = "1101")
** Description: Read 565 pixel colours from a defined area
***************************************************************************************/
void TFT_eSPI::readRect(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data)
{
if ((x > _width) || (y > _height) || (w == 0) || (h == 0)) return;
#if defined(TFT_PARALLEL_8_BIT)
CS_L;
readAddrWindow(x, y, w, h);
// Set masked pins D0- D7 to input
busDir(dir_mask, INPUT);
// Dummy read to throw away don't care value
readByte();
// Total pixel count
uint32_t len = w * h;
#if defined (ILI9341_DRIVER) | defined (ILI9488_DRIVER) // Read 3 bytes
// Fetch the 24 bit RGB value
while (len--) {
// Assemble the RGB 16 bit colour
uint16_t rgb = ((readByte() & 0xF8) << 8) | ((readByte() & 0xFC) << 3) | (readByte() >> 3);
// Swapped byte order for compatibility with pushRect()
*data++ = (rgb<<8) | (rgb>>8);
}
#else // ILI9481 reads as 16 bits
// Fetch the 16 bit BRG pixels
while (len--) {
#ifdef ILI9486_DRIVER
// Read the RGB 16 bit colour
*data++ = readByte() | (readByte() << 8);
#else
// Read the BRG 16 bit colour
uint16_t bgr = (readByte() << 8) | readByte();
// Swap Red and Blue (could check MADCTL setting to see if this is needed)
uint16_t rgb = (bgr>>11) | (bgr<<11) | (bgr & 0x7E0);
// Swapped byte order for compatibility with pushRect()
*data++ = (rgb<<8) | (rgb>>8);
#endif
}
#endif
CS_H;
// Set masked pins D0- D7 to output
busDir(dir_mask, OUTPUT);
#else // SPI interface
begin_tft_read();
readAddrWindow(x, y, w, h);
#ifdef TFT_SDA_READ
begin_SDA_Read();
#endif
// Dummy read to throw away don't care value
tft_Read_8();
// Read window pixel 24 bit RGB values
uint32_t len = w * h;
while (len--) {
#if !defined (ILI9488_DRIVER)
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
uint8_t r = tft_Read_8();
uint8_t g = tft_Read_8();
uint8_t b = tft_Read_8();
#else
// The 6 colour bits are in MS 6 bits of each byte but we do not include the extra clock pulse
// so we use a trick and mask the middle 6 bits of the byte, then only shift 1 place left
uint8_t r = (tft_Read_8()&0x7E)<<1;
uint8_t g = (tft_Read_8()&0x7E)<<1;
uint8_t b = (tft_Read_8()&0x7E)<<1;
#endif
// Swapped colour byte order for compatibility with pushRect()
*data++ = (r & 0xF8) | (g & 0xE0) >> 5 | (b & 0xF8) << 5 | (g & 0x1C) << 11;
}
CS_H;
#ifdef TFT_SDA_READ
end_SDA_Read();
#endif
end_tft_read();
#endif
}
/***************************************************************************************
** Function name: push rectangle
** Description: push 565 pixel colours into a defined area
***************************************************************************************/
void TFT_eSPI::pushRect(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data)
{
bool swap = _swapBytes; _swapBytes = false;
pushImage(x, y, w, h, data);
_swapBytes = swap;
}
/***************************************************************************************
** Function name: pushImage
** Description: plot 16 bit colour sprite or image onto TFT
***************************************************************************************/
void TFT_eSPI::pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data)
{
if ((x >= _width) || (y >= _height)) return;
int32_t dx = 0;
int32_t dy = 0;
int32_t dw = w;
int32_t dh = h;
if (x < 0) { dw += x; dx = -x; x = 0; }
if (y < 0) { dh += y; dy = -y; y = 0; }
if ((x + dw) > _width ) dw = _width - x;
if ((y + dh) > _height) dh = _height - y;
if (dw < 1 || dh < 1) return;
begin_tft_write();
inTransaction = true;
setWindow(x, y, x + dw - 1, y + dh - 1);
data += dx + dy * w;
// Check if whole image can be pushed
if (dw == w) pushPixels(data, dw * dh);
else {
// Push line segments to crop image
while (dh--)
{
pushPixels(data, dw);
data += w;
}
}
inTransaction = false;
end_tft_write();
}
/***************************************************************************************
** Function name: pushImage
** Description: plot 16 bit sprite or image with 1 colour being transparent
***************************************************************************************/
void TFT_eSPI::pushImage(int32_t x, int32_t y, int32_t w, int32_t h, uint16_t *data, uint16_t transp)
{
if ((x >= _width) || (y >= _height)) return;
int32_t dx = 0;
int32_t dy = 0;
int32_t dw = w;
int32_t dh = h;
if (x < 0) { dw += x; dx = -x; x = 0; }
if (y < 0) { dh += y; dy = -y; y = 0; }
if ((x + dw) > _width ) dw = _width - x;
if ((y + dh) > _height) dh = _height - y;
if (dw < 1 || dh < 1) return;
begin_tft_write();
inTransaction = true;
data += dx + dy * w;
int32_t xe = x + dw - 1, ye = y + dh - 1;
uint16_t lineBuf[dw]; // Use buffer to minimise setWindow call count
// The little endian transp color must be byte swapped if the image is big endian
if (!_swapBytes) transp = transp >> 8 | transp << 8;
while (dh--)
{
int32_t len = dw;
uint16_t* ptr = data;
int32_t px = x;
bool move = true;
uint16_t np = 0;
while (len--)
{
if (transp != *ptr)
{
if (move) { move = false; setWindow(px, y, xe, ye); }
lineBuf[np] = *ptr;
np++;
}
else
{
move = true;
if (np)
{
pushPixels((uint16_t*)lineBuf, np);
np = 0;
}
}
px++;
ptr++;
}
if (np) pushPixels((uint16_t*)lineBuf, np);
y++;
data += w;
}
inTransaction = false;
end_tft_write();
}
/***************************************************************************************
** Function name: pushImage - for FLASH (PROGMEM) stored images
** Description: plot 16 bit image
***************************************************************************************/
void TFT_eSPI::pushImage(int32_t x, int32_t y, int32_t w, int32_t h, const uint16_t *data)