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TFT_eSPI.cpp
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TFT_eSPI.cpp
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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 larger fonts are Run Length Encoded to reduce their
size.
Created by Bodmer 2/12/16
Bodmer: Added RPi 16 bit display support
****************************************************/
#include "TFT_eSPI.h"
#if defined (ESP32)
#if !defined (ESP32_PARALLEL)
#ifdef USE_HSPI_PORT
SPIClass spi = SPIClass(HSPI);
#else // use default VSPI port
SPIClass& spi = SPI;
#endif
#endif
#else // ESP8266
SPIClass& spi = SPI;
#endif
// SUPPORT_TRANSACTIONS is mandatory for ESP32 so the hal mutex is toggled
#if defined (ESP32) && !defined (SUPPORT_TRANSACTIONS)
#define SUPPORT_TRANSACTIONS
#endif
// If it is a 16bit serial display we must transfer 16 bits every time
#ifdef RPI_ILI9486_DRIVER
#define CMD_BITS 16-1
#else
#define CMD_BITS 8-1
#endif
// Fast block write prototype
void writeBlock(uint16_t color, uint32_t repeat);
// Byte read prototype
uint8_t readByte(void);
// GPIO parallel input/output control
void busDir(uint32_t mask, uint8_t mode);
inline void TFT_eSPI::spi_begin(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(ESP32_PARALLEL)
if (locked) {locked = false; spi.beginTransaction(SPISettings(SPI_FREQUENCY, MSBFIRST, TFT_SPI_MODE)); CS_L;}
#else
CS_L;
#endif
#ifdef ESP8266
SPI1U = SPI1U_WRITE;
#endif
}
inline void TFT_eSPI::spi_end(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(ESP32_PARALLEL)
if(!inTransaction) {if (!locked) {locked = true; CS_H; spi.endTransaction();}}
#ifdef ESP8266
SPI1U = SPI1U_READ;
#endif
#else
if(!inTransaction) CS_H;
#endif
}
inline void TFT_eSPI::spi_begin_read(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(ESP32_PARALLEL)
if (locked) {locked = false; spi.beginTransaction(SPISettings(SPI_READ_FREQUENCY, MSBFIRST, TFT_SPI_MODE)); CS_L;}
#else
#if !defined(ESP32_PARALLEL)
spi.setFrequency(SPI_READ_FREQUENCY);
#endif
CS_L;
#endif
#ifdef ESP8266
SPI1U = SPI1U_READ;
#endif
}
inline void TFT_eSPI::spi_end_read(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(ESP32_PARALLEL)
if(!inTransaction) {if (!locked) {locked = true; CS_H; spi.endTransaction();}}
#else
#if !defined(ESP32_PARALLEL)
spi.setFrequency(SPI_FREQUENCY);
#endif
if(!inTransaction) CS_H;
#endif
#ifdef ESP8266
SPI1U = SPI1U_WRITE;
#endif
}
#if defined (TOUCH_CS) && defined (SPI_TOUCH_FREQUENCY) // && !defined(ESP32_PARALLEL)
inline void TFT_eSPI::spi_begin_touch(void){
CS_H; // Just in case it has been left low
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS)
if (locked) {locked = false; spi.beginTransaction(SPISettings(SPI_TOUCH_FREQUENCY, MSBFIRST, SPI_MODE0));}
#else
spi.setFrequency(SPI_TOUCH_FREQUENCY);
#endif
#ifdef ESP8266
SPI1U = SPI1U_READ;
#endif
T_CS_L;
}
inline void TFT_eSPI::spi_end_touch(void){
T_CS_H;
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS)
if(!inTransaction) {if (!locked) {locked = true; spi.endTransaction();}}
#else
spi.setFrequency(SPI_FREQUENCY);
#endif
#ifdef ESP8266
SPI1U = SPI1U_WRITE;
#endif
}
#endif
/***************************************************************************************
** 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
digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
pinMode(TFT_CS, OUTPUT);
#endif
// Configure chip select for touchscreen controller if present
#ifdef TOUCH_CS
digitalWrite(TOUCH_CS, HIGH); // Chip select high (inactive)
pinMode(TOUCH_CS, OUTPUT);
#endif
#ifdef TFT_WR
digitalWrite(TFT_WR, HIGH); // Set write strobe high (inactive)
pinMode(TFT_WR, OUTPUT);
#endif
#ifdef TFT_DC
digitalWrite(TFT_DC, HIGH); // Data/Command high = data mode
pinMode(TFT_DC, OUTPUT);
#endif
#ifdef TFT_RST
if (TFT_RST >= 0) {
digitalWrite(TFT_RST, HIGH); // Set high, do not share pin with another SPI device
pinMode(TFT_RST, OUTPUT);
}
#endif
#ifdef ESP32_PARALLEL
// Create a bit set lookup table for data bus - wastes 1kbyte of RAM but speeds things up dramatically
for (int32_t c = 0; c<256; c++)
{
xset_mask[c] = 0;
if ( c & 0x01 ) xset_mask[c] |= (1 << TFT_D0);
if ( c & 0x02 ) xset_mask[c] |= (1 << TFT_D1);
if ( c & 0x04 ) xset_mask[c] |= (1 << TFT_D2);
if ( c & 0x08 ) xset_mask[c] |= (1 << TFT_D3);
if ( c & 0x10 ) xset_mask[c] |= (1 << TFT_D4);
if ( c & 0x20 ) xset_mask[c] |= (1 << TFT_D5);
if ( c & 0x40 ) xset_mask[c] |= (1 << TFT_D6);
if ( c & 0x80 ) xset_mask[c] |= (1 << TFT_D7);
}
// Make sure read is high before we set the bus to output
digitalWrite(TFT_RD, HIGH);
pinMode(TFT_RD, OUTPUT);
GPIO.out_w1ts = set_mask(255); // Set data bus to 0xFF
// Set TFT data bus lines to output
busDir(dir_mask, OUTPUT);
#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; // ESP32 transaction mutex lock flags
inTransaction = false;
_booted = true;
_cp437 = true;
_utf8 = true;
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)
#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
#ifdef TFT_SPI_OVERLAP
// 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(ESP32_PARALLEL)
#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;
// SUPPORT_TRANSACTIONS is mandatory for ESP32 so the hal mutex is toggled
// so the code here is for ESP8266 only
#if !defined (SUPPORT_TRANSACTIONS) && defined (ESP8266)
spi.setBitOrder(MSBFIRST);
spi.setDataMode(TFT_SPI_MODE);
spi.setFrequency(SPI_FREQUENCY);
#endif
#if defined(ESP32_PARALLEL)
digitalWrite(TFT_CS, LOW); // Chip select low permanently
pinMode(TFT_CS, OUTPUT);
#else
#ifdef TFT_CS
// Set to output once again in case D6 (MISO) is used for CS
digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
pinMode(TFT_CS, OUTPUT);
#else
spi.setHwCs(1); // Use hardware SS toggling
#endif
#endif
// Set to output once again in case D6 (MISO) is used for DC
#ifdef TFT_DC
digitalWrite(TFT_DC, HIGH); // Data/Command high = data mode
pinMode(TFT_DC, OUTPUT);
#endif
_booted = false;
spi_end();
} // end of: if just _booted
// Toggle RST low to reset
spi_begin();
#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
spi_end();
delay(150); // Wait for reset to complete
spi_begin();
// 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 (RPI_ILI9486_DRIVER)
#include "TFT_Drivers/ILI9486_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 (ST7789_2_DRIVER)
#include "TFT_Drivers/ST7789_2_Init.h"
#endif
#ifdef TFT_INVERSION_ON
writecommand(TFT_INVON);
#endif
#ifdef TFT_INVERSION_OFF
writecommand(TFT_INVOFF);
#endif
spi_end();
setRotation(rotation);
#if defined (TFT_BL) && defined (TFT_BACKLIGHT_ON)
digitalWrite(TFT_BL, TFT_BACKLIGHT_ON);
pinMode(TFT_BL, OUTPUT);
#else
#if defined (TFT_BL) && defined (M5STACK)
// Turn on the back-light LED
digitalWrite(TFT_BL, HIGH);
pinMode(TFT_BL, OUTPUT);
#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)
{
spi_begin();
// 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 (RPI_ILI9486_DRIVER)
#include "TFT_Drivers/ILI9486_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 (ST7789_2_DRIVER)
#include "TFT_Drivers/ST7789_2_Rotation.h"
#endif
delayMicroseconds(10);
spi_end();
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)
{
tft_Write_8(c);
}
/***************************************************************************************
** Function name: writecommand
** Description: Send an 8 bit command to the TFT
***************************************************************************************/
void TFT_eSPI::writecommand(uint8_t c)
{
spi_begin(); // CS_L;
DC_C;
tft_Write_8(c);
DC_D;
spi_end(); // CS_H;
}
/***************************************************************************************
** Function name: writedata
** Description: Send a 8 bit data value to the TFT
***************************************************************************************/
void TFT_eSPI::writedata(uint8_t d)
{
spi_begin(); // CS_L;
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
spi_end(); // CS_H;
}
/***************************************************************************************
** 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 ESP32_PARALLEL
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
// for ILI9341 Interface II i.e. IM [3:0] = "1101"
spi_begin_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();
spi_end_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 = (readcommand8(cmd_function, index + 0) << 24);
reg |= (readcommand8(cmd_function, index + 1) << 16);
reg |= (readcommand8(cmd_function, index + 2) << 8);
reg |= (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(ESP32_PARALLEL)
readAddrWindow(x0, y0, 1, 1); // Sets CS low
// 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 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);
// Swap Red and Blue (could check MADCTL setting to see if this is needed)
return (bgr>>11) | (bgr<<11) | (bgr & 0x7E0);
#endif
#else // Not ESP32_PARALLEL
spi_begin_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
spi_end_read();
return color565(r, g, b);
#endif
}
/***************************************************************************************
** Function name: read byte - supports class functions
** Description: Read a byte from ESP32 8 bit data port
***************************************************************************************/
// Bus MUST be set to input before calling this function!
uint8_t readByte(void)
{
uint8_t b = 0;
#ifdef ESP32_PARALLEL
RD_L;
uint32_t reg; // Read all GPIO pins 0-31
reg = gpio_input_get(); // Read three times to allow for bus access time
reg = gpio_input_get();
reg = gpio_input_get(); // Data should be stable now
RD_H;
// Check GPIO bits used and build value
b = (((reg>>TFT_D0)&1) << 0);
b |= (((reg>>TFT_D1)&1) << 1);
b |= (((reg>>TFT_D2)&1) << 2);
b |= (((reg>>TFT_D3)&1) << 3);
b |= (((reg>>TFT_D4)&1) << 4);
b |= (((reg>>TFT_D5)&1) << 5);
b |= (((reg>>TFT_D6)&1) << 6);
b |= (((reg>>TFT_D7)&1) << 7);
#endif
return b;
}
/***************************************************************************************
** Function name: masked GPIO direction control - supports class functions
** Description: Set masked ESP32 GPIO pins to input or output
***************************************************************************************/
void busDir(uint32_t mask, uint8_t mode)
{
#ifdef ESP32_PARALLEL
// Supports GPIO 0 - 31 on ESP32 only
gpio_config_t gpio;
gpio.pin_bit_mask = mask;
gpio.mode = GPIO_MODE_INPUT;
gpio.pull_up_en = GPIO_PULLUP_ENABLE;
gpio.pull_down_en = GPIO_PULLDOWN_DISABLE;
gpio.intr_type = GPIO_INTR_DISABLE;
if (mode == OUTPUT) gpio.mode = GPIO_MODE_OUTPUT;
gpio_config(&gpio);
#endif
}
/***************************************************************************************
** 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(ESP32_PARALLEL)
readAddrWindow(x, y, w, h); // Sets CS low
// 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--) {
// 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
CS_H;
// Set masked pins D0- D7 to output
busDir(dir_mask, OUTPUT);
#else // Not ESP32_PARALLEL
spi_begin_read();
readAddrWindow(x, y, w, h); // Sets CS low
#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 LS 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
spi_end_read();
#endif
}
/***************************************************************************************
** Function name: tft_Read_8
** Description: Software SPI to read bidirectional SDA line
***************************************************************************************/
#if defined (ESP8266) && defined (TFT_SDA_READ)
uint8_t TFT_eSPI::tft_Read_8(void)
{
uint8_t ret = 0;
uint32_t reg = 0;
for (uint8_t i = 0; i < 8; i++) { // read results
ret <<= 1;
SCLK_L;
if (digitalRead(TFT_MOSI)) ret |= 1;
SCLK_H;
}
return ret;
}
#endif
/***************************************************************************************
** Function name: beginSDA
** Description: Detach SPI from pin to permit software SPI
***************************************************************************************/
#ifdef TFT_SDA_READ
void TFT_eSPI::begin_SDA_Read(void)
{
#ifdef ESP32
pinMatrixOutDetach(TFT_MOSI, false, false);
pinMode(TFT_MOSI, INPUT);
pinMatrixInAttach(TFT_MOSI, VSPIQ_IN_IDX, false);
#else // ESP8266
#ifdef TFT_SPI_OVERLAP
// Reads in overlap mode not supported
#else
spi.end();
#endif
#endif
}
#endif
/***************************************************************************************
** Function name: endSDA
** Description: Attach SPI pins after software SPI
***************************************************************************************/
#ifdef TFT_SDA_READ
void TFT_eSPI::end_SDA_Read(void)
{
#ifdef ESP32
pinMode(TFT_MOSI, OUTPUT);
pinMatrixOutAttach(TFT_MOSI, VSPID_OUT_IDX, false, false);
pinMode(TFT_MISO, INPUT);
pinMatrixInAttach(TFT_MISO, VSPIQ_IN_IDX, false);
#else
#ifdef TFT_SPI_OVERLAP
spi.pins(6, 7, 8, 0);
#else
spi.begin();
#endif
#endif
}
#endif
/***************************************************************************************
** Function name: push rectangle (for SPI Interface II i.e. IM [3:0] = "1101")
** 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)
{
// Function deprecated, remains for backwards compatibility
// pushImage() is better as it will crop partly off-screen image blocks
pushImage(x, y, w, h, data);
}
/***************************************************************************************
** 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 + w) > _width ) dw = _width - x;
if ((y + h) > _height) dh = _height - y;
if (dw < 1 || dh < 1) return;