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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
// Clipping macro for pushImage
#define PI_CLIP \
if (_vpOoB) return; \
x+= _xDatum; \
y+= _yDatum; \
\
if ((x >= _vpW) || (y >= _vpH)) return; \
\
int32_t dx = 0; \
int32_t dy = 0; \
int32_t dw = w; \
int32_t dh = h; \
\
if (x < _vpX) { dx = _vpX - x; dw -= dx; x = _vpX; } \
if (y < _vpY) { dy = _vpY - y; dh -= dy; y = _vpY; } \
\
if ((x + dw) > _vpW ) dw = _vpW - x; \
if ((y + dh) > _vpH ) dh = _vpH - y; \
\
if (dw < 1 || dh < 1) return;
/***************************************************************************************
** 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;
SET_BUS_WRITE_MODE;
}
#else
CS_L;
SET_BUS_WRITE_MODE;
#endif
}
/***************************************************************************************
** 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; SET_BUS_READ_MODE;}
#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: setViewport
** Description: Set the clipping region for the TFT screen
***************************************************************************************/
void TFT_eSPI::setViewport(int32_t x, int32_t y, int32_t w, int32_t h, bool vpDatum)
{
// Viewport metrics (not clipped)
_xDatum = x; // Datum x position in screen coordinates
_yDatum = y; // Datum y position in screen coordinates
_xWidth = w; // Viewport width
_yHeight = h; // Viewport height
// Full size default viewport
_vpDatum = false; // Datum is at top left corner of screen (true = top left of viewport)
_vpOoB = false; // Out of Bounds flag (true is all of viewport is off screen)
_vpX = 0; // Viewport top left corner x coordinate
_vpY = 0; // Viewport top left corner y coordinate
_vpW = width(); // Equivalent of TFT width (Nb: viewport right edge coord + 1)
_vpH = height(); // Equivalent of TFT height (Nb: viewport bottom edge coord + 1)
// Clip viewport to screen area
if (x<0) { w += x; x = 0; }
if (y<0) { h += y; y = 0; }
if ((x + w) > width() ) { w = width() - x; }
if ((y + h) > height() ) { h = height() - y; }
//Serial.print(" x=");Serial.print( x);Serial.print(", y=");Serial.print( y);
//Serial.print(", w=");Serial.print(w);Serial.print(", h=");Serial.println(h);
// Check if viewport is entirely out of bounds
if (w < 1 || h < 1)
{
// Set default values and Out of Bounds flag in case of error
_xDatum = 0;
_yDatum = 0;
_xWidth = width();
_yHeight = height();
_vpOoB = true; // Set Out of Bounds flag to inhibit all drawing
return;
}
if (!vpDatum)
{
_xDatum = 0; // Reset to top left of screen if not using a viewport datum
_yDatum = 0;
_xWidth = width();
_yHeight = height();
}
// Store the clipped screen viewport metrics and datum position
_vpX = x;
_vpY = y;
_vpW = x + w;
_vpH = y + h;
_vpDatum = vpDatum;
//Serial.print(" _xDatum=");Serial.print( _xDatum);Serial.print(", _yDatum=");Serial.print( _yDatum);
//Serial.print(", _xWidth=");Serial.print(_xWidth);Serial.print(", _yHeight=");Serial.println(_yHeight);
//Serial.print(" _vpX=");Serial.print( _vpX);Serial.print(", _vpY=");Serial.print( _vpY);
//Serial.print(", _vpW=");Serial.print(_vpW);Serial.print(", _vpH=");Serial.println(_vpH);
}
/***************************************************************************************
** Function name: checkViewport
** Description: Check if any part of specified area is visible in viewport
***************************************************************************************/
// Note: Setting w and h to 1 will check if coordinate x,y is in area
bool TFT_eSPI::checkViewport(int32_t x, int32_t y, int32_t w, int32_t h)
{
if (_vpOoB) return false;
x+= _xDatum;
y+= _yDatum;
if ((x >= _vpW) || (y >= _vpH)) return false;
int32_t dx = 0;
int32_t dy = 0;
int32_t dw = w;
int32_t dh = h;
if (x < _vpX) { dx = _vpX - x; dw -= dx; x = _vpX; }
if (y < _vpY) { dy = _vpY - y; dh -= dy; y = _vpY; }
if ((x + dw) > _vpW ) dw = _vpW - x;
if ((y + dh) > _vpH ) dh = _vpH - y;
if (dw < 1 || dh < 1) return false;
return true;
}
/***************************************************************************************
** Function name: resetViewport
** Description: Reset viewport to whle TFT screen, datum at 0,0
***************************************************************************************/
void TFT_eSPI::resetViewport(void)
{
// Reset viewport to the whole screen (or sprite) area
_vpDatum = false;
_vpOoB = false;
_xDatum = 0;
_yDatum = 0;
_vpX = 0;
_vpY = 0;
_vpW = width();
_vpH = height();
_xWidth = width();
_yHeight = height();
}
/***************************************************************************************
** Function name: getViewportX
** Description: Get x position of the viewport datum
***************************************************************************************/
int32_t TFT_eSPI::getViewportX(void)
{
return _xDatum;
}
/***************************************************************************************
** Function name: getViewportY
** Description: Get y position of the viewport datum
***************************************************************************************/
int32_t TFT_eSPI::getViewportY(void)
{
return _yDatum;
}
/***************************************************************************************
** Function name: getViewportWidth
** Description: Get width of the viewport
***************************************************************************************/
int32_t TFT_eSPI::getViewportWidth(void)
{
return _xWidth;
}
/***************************************************************************************
** Function name: getViewportHeight
** Description: Get height of the viewport
***************************************************************************************/
int32_t TFT_eSPI::getViewportHeight(void)
{
return _yHeight;
}
/***************************************************************************************
** Function name: getViewportDatum
** Description: Get datum flag of the viewport (true = viewport corner)
***************************************************************************************/
bool TFT_eSPI::getViewportDatum(void)
{
return _vpDatum;
}
/***************************************************************************************
** Function name: frameViewport
** Description: Draw a frame inside or outside the viewport of width w
***************************************************************************************/
void TFT_eSPI::frameViewport(uint16_t color, int32_t w)
{
// Save datum position
bool _dT = _vpDatum;
// If w is positive the frame is drawn inside the viewport
// a large positive width will clear the screen inside the viewport
if (w>0)
{
// Set vpDatum true to simplify coordinate derivation
_vpDatum = true;
fillRect(0, 0, _vpW - _vpX, w, color); // Top
fillRect(0, w, w, _vpH - _vpY - w - w, color); // Left
fillRect(_xWidth - w, w, w, _yHeight - w - w, color); // Right
fillRect(0, _yHeight - w, _xWidth, w, color); // Bottom
}
else
// If w is negative the frame is drawn outside the viewport
// a large negative width will clear the screen outside the viewport
{
w = -w;
// Save old values
int32_t _xT = _vpX; _vpX = 0;
int32_t _yT = _vpY; _vpY = 0;
int32_t _wT = _vpW;
int32_t _hT = _vpH;
// Set vpDatum false so frame can be drawn outside window
_vpDatum = false; // When false the full width and height is accessed
_vpH = height();
_vpW = width();
// Draw frame
fillRect(_xT - w - _xDatum, _yT - w - _yDatum, _wT - _xT + w + w, w, color); // Top
fillRect(_xT - w - _xDatum, _yT - _yDatum, w, _hT - _yT, color); // Left
fillRect(_wT - _xDatum, _yT - _yDatum, w, _hT - _yT, color); // Right
fillRect(_xT - w - _xDatum, _hT - _yDatum, _wT - _xT + w + w, w, color); // Bottom
// Restore old values
_vpX = _xT;
_vpY = _yT;
_vpW = _wT;
_vpH = _hT;
}
// Restore vpDatum
_vpDatum = _dT;
}
/***************************************************************************************
** 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;
// The ST7796 appears to need a 4ms delay after a CGRAM read, otherwise subsequent writes will fail!
#ifdef ST7796_DRIVER
delay(4);
#endif
}
/***************************************************************************************
** 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
// Reset the viewport to the whole screen
resetViewport();
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_DRIVER)
#include "TFT_Drivers/SSD1963_Init.h"
#elif defined (GC9A01_DRIVER)
#include "TFT_Drivers/GC9A01_Init.h"
#elif defined (ILI9225_DRIVER)
#include "TFT_Drivers/ILI9225_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"
#elif defined (SSD1963_DRIVER)
#include "TFT_Drivers/SSD1963_Rotation.h"
#elif defined (GC9A01_DRIVER)
#include "TFT_Drivers/GC9A01_Rotation.h"
#elif defined (ILI9225_DRIVER)
#include "TFT_Drivers/ILI9225_Rotation.h"
#endif
delayMicroseconds(10);
end_tft_write();
addr_row = 0xFFFF;
addr_col = 0xFFFF;
// Reset the viewport to the whole screen
resetViewport();
}
/***************************************************************************************
** 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 (_vpOoB) return 0;
x0+= _xDatum;
y0+= _yDatum;
// Range checking
if ((x0 < _vpX) || (y0 < _vpY) ||(x0 >= _vpW) || (y0 >= _vpH)) return 0;
#if defined(TFT_PARALLEL_8_BIT)
CS_L;
readAddrWindow(x0, y0, 1, 1);
// Set masked pins D0- D7 to input
busDir(dir_mask, INPUT);
#if !defined (SSD1963_DRIVER)
// Dummy read to throw away don't care value
readByte();
#endif
// Fetch the 16 bit BRG pixel
//uint16_t rgb = (readByte() << 8) | readByte();
#if defined (ILI9341_DRIVER) | defined (ILI9488_DRIVER) | defined (SSD1963_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();}
uint16_t color = 0;
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)
#if defined (ST7796_DRIVER)
// Read the 2 bytes
color = ((tft_Read_8()) << 8) | (tft_Read_8());
#else
// 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();
color = color565(r, g, b);
#endif