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TFT_eSPI.cpp
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/***************************************************
Arduino TFT graphics library targetted at ESP8266
based boards. (ESP32 support is planned!)
This library has been derived from the Adafruit_GFX
library and the associated driver library. See text
at the end of this file.
This is a standalone library that contains the
hardware driver, the graphics funtions 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"
#include <pgmspace.h>
//#include <limits.h>
//#include "pins_arduino.h"
//#include "wiring_private.h"
#if !defined(ESP32_PARALLEL)
#include <SPI.h>
#endif
// If it is a 16bit serial display we must transfer 16 bits every time
#ifdef RPI_ILI9486_DRIVER
#define SEND_16_BITS
#define CMD_BITS 16-1
#else
#define CMD_BITS 8-1
#endif
// Fast SPI block write prototype
void spiWriteBlock(uint16_t color, uint32_t repeat);
// If the SPI library has transaction support, these functions
// establish settings and protect from interference from other
// libraries. Otherwise, they simply do nothing.
inline void TFT_eSPI::spi_begin(void){
#ifdef SPI_HAS_TRANSACTION
#ifdef SUPPORT_TRANSACTIONS
if (locked) {locked = false; SPI.beginTransaction(SPISettings(SPI_FREQUENCY, MSBFIRST, SPI_MODE0));}
#endif
#endif
}
inline void TFT_eSPI::spi_end(void){
#ifdef SPI_HAS_TRANSACTION
#ifdef SUPPORT_TRANSACTIONS
if(!inTransaction) {if (!locked) {locked = true; SPI.endTransaction();}}
#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
#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
#if defined(ESP32_PARALLEL)
pinMode(TFT_D0, OUTPUT);
pinMode(TFT_D1, OUTPUT);
pinMode(TFT_D2, OUTPUT);
pinMode(TFT_D3, OUTPUT);
pinMode(TFT_D4, OUTPUT);
pinMode(TFT_D5, OUTPUT);
pinMode(TFT_D6, OUTPUT);
pinMode(TFT_D7, OUTPUT);
pinMode(TFT_RD, OUTPUT);
digitalWrite(TFT_RD, HIGH);
#endif
_width = w; // Set by specific xxxxx_Defines.h file or by users sketch
_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 = 0xFFFF; // White
textbgcolor = 0x0000; // Black
padX = 0; // No padding
textwrap = true; // Wrap text when using print stream
textdatum = TL_DATUM; // Top Left text alignment is default
fontsloaded = 0;
locked = true; // ESP32 transaction mutex lock flags
inTransaction = false;
addr_row = 0xFFFF;
addr_col = 0xFFFF;
#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
}
/***************************************************************************************
** Function name: begin
** Description: Included for backwards compatibility
***************************************************************************************/
void TFT_eSPI::begin(void)
{
init();
}
/***************************************************************************************
** Function name: init
** Description: Reset, then initialise the TFT display registers
***************************************************************************************/
void TFT_eSPI::init(void)
{
#if !defined (ESP32)
#ifdef TFT_CS
cspinmask = (uint32_t) digitalPinToBitMask(TFT_CS);
#endif
#ifdef TFT_DC
dcpinmask = (uint32_t) digitalPinToBitMask(TFT_DC);
#endif
#ifdef TFT_WR
wrpinmask = (uint32_t) digitalPinToBitMask(TFT_WR);
#endif
SPI.begin(); // This will set MISO to input
#else
#if !defined(ESP32_PARALLEL)
#ifdef TFT_MOSI
SPI.begin(TFT_SCLK, TFT_MISO, TFT_MOSI, -1);
#else
SPI.begin();
#endif
#endif.
#endif
inTransaction = false;
locked = true;
#if !defined(ESP32_PARALLEL)
#ifndef SUPPORT_TRANSACTIONS
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
SPI.setFrequency(SPI_FREQUENCY);
//SPI.setHwCs(1); // Use hardware SS toggling on GPIO15 (D8) - not supported - benefit is only ~0.8% performance boost
#ifdef ESP32 // Unlock the SPI hal mutex and set the lock management flags
SPI.beginTransaction(SPISettings(SPI_FREQUENCY, MSBFIRST, SPI_MODE0));
inTransaction = true; // Flag to stop intermediate spi_end calls
locked = false; // Flag to stop repeat beginTransaction calls
#endif
#endif
#endif
// Set to output once again in case D6 (MISO) is used for CS
#ifdef TFT_CS
digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
pinMode(TFT_CS, OUTPUT);
#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
// 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);
delay(150);
}
#endif
spi_begin();
writecommand(TFT_SWRST); // Software reset
spi_end();
delay(5); // Wait for software 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)
#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/RPI_ILI9486_Init.h"
#endif
spi_end();
}
/***************************************************************************************
** 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/RPI_ILI9486_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;
spi_begin();
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) );
}
}
spi_end();
}
/***************************************************************************************
** Function name: spiwrite
** Description: Write 8 bits to SPI port (legacy support only)
***************************************************************************************/
void TFT_eSPI::spiwrite(uint8_t c)
{
SPI.transfer(c);
}
/***************************************************************************************
** Function name: writecommand
** Description: Send an 8 bit command to the TFT
***************************************************************************************/
void TFT_eSPI::writecommand(uint8_t c)
{
DC_C;
CS_L;
#if !defined(ESP32_PARALLEL)
#ifdef SEND_16_BITS
SPI.transfer(0);
#endif
SPI.transfer(c);
#else
WR_L;
( c & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( c & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( c & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( c & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( c & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( c & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( c & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( c & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
#endif
CS_H;
DC_D;
}
/***************************************************************************************
** Function name: writedata
** Description: Send a 8 bit data value to the TFT
***************************************************************************************/
void TFT_eSPI::writedata(uint8_t c)
{
CS_L;
#if !defined(ESP32_PARALLEL)
#ifdef SEND_16_BITS
SPI.transfer(0);
#endif
SPI.transfer(c);
#else
WR_L;
( c & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( c & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( c & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( c & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( c & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( c & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( c & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( c & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
#endif
CS_H;
}
#if defined(ESP32_PARALLEL)
void TFT_eSPI::writedata16(uint16_t c)
{
uint8_t b0, b1;
b0 = ( c & 0xff00 ) >> 8;
b1 = ( c & 0x00ff );
//CS_L;
WR_L;
( b0 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b0 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b0 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b0 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b0 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b0 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b0 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b0 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
WR_L;
( b1 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b1 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b1 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b1 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b1 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b1 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b1 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b1 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
//CS_H;
}
void TFT_eSPI::writedata32(uint32_t d)
{
uint8_t b0, b1, b2, b3;
b0 = ( d & 0xff000000 ) >> 24;
b1 = ( d & 0x00ff0000 ) >> 16;
b2 = ( d & 0x0000ff00 ) >> 8;
b3 = ( d & 0x000000ff );
//CS_L;
WR_L;
( b0 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b0 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b0 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b0 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b0 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b0 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b0 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b0 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
WR_L;
( b1 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b1 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b1 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b1 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b1 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b1 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b1 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b1 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
WR_L;
( b2 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b2 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b2 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b2 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b2 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b2 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b2 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b2 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
WR_L;
( b3 & 0x01 ) ? GPIO.out_w1ts |= (1 << TFT_D0) : GPIO.out_w1tc |= (1 << TFT_D0);
( b3 & 0x02 ) ? GPIO.out_w1ts |= (1 << TFT_D1) : GPIO.out_w1tc |= (1 << TFT_D1);
( b3 & 0x04 ) ? GPIO.out_w1ts |= (1 << TFT_D2) : GPIO.out_w1tc |= (1 << TFT_D2);
( b3 & 0x08 ) ? GPIO.out_w1ts |= (1 << TFT_D3) : GPIO.out_w1tc |= (1 << TFT_D3);
( b3 & 0x10 ) ? GPIO.out_w1ts |= (1 << TFT_D4) : GPIO.out_w1tc |= (1 << TFT_D4);
( b3 & 0x20 ) ? GPIO.out_w1ts |= (1 << TFT_D5) : GPIO.out_w1tc |= (1 << TFT_D5);
( b3 & 0x40 ) ? GPIO.out_w1ts |= (1 << TFT_D6) : GPIO.out_w1tc |= (1 << TFT_D6);
( b3 & 0x80 ) ? GPIO.out_w1ts |= (1 << TFT_D7) : GPIO.out_w1tc |= (1 << TFT_D7);
WR_H;
//CS_H;
}
#endif
/***************************************************************************************
** Function name: readcommand8 (for ILI9341 Interface II i.e. IM [3:0] = "1101")
** Description: Read a 8 bit data value from an indexed command register
***************************************************************************************/
uint8_t TFT_eSPI::readcommand8(uint8_t cmd_function, uint8_t index)
{
#if !defined(ESP32_PARALLEL)
spi_begin();
index = 0x10 + (index & 0x0F);
DC_C;
CS_L;
SPI.transfer(0xD9);
DC_D;
SPI.transfer(index);
CS_H;
DC_C;
CS_L;
SPI.transfer(cmd_function);
DC_D;
uint8_t reg = SPI.transfer(0);
CS_H;
spi_end();
return reg;
#endif
}
/***************************************************************************************
** Function name: readcommand16 (for ILI9341 Interface II i.e. IM [3:0] = "1101")
** Description: Read a 16 bit data value from an indexed command register
***************************************************************************************/
uint16_t TFT_eSPI::readcommand16(uint8_t cmd_function, uint8_t index)
{
#if !defined(ESP32_PARALLEL)
uint32_t reg = 0;
reg |= (readcommand8(cmd_function, index + 0) << 8);
reg |= (readcommand8(cmd_function, index + 1) << 0);
return reg;
#endif
}
/***************************************************************************************
** Function name: readcommand32 (for ILI9341 Interface II i.e. IM [3:0] = "1101")
** Description: Read a 32 bit data value from an indexed command register
***************************************************************************************/
uint32_t TFT_eSPI::readcommand32(uint8_t cmd_function, uint8_t index)
{
#if !defined(ESP32_PARALLEL)
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;
#endif
}
/***************************************************************************************
** 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)
spi_begin();
readAddrWindow(x0, y0, x0, y0); // Sets CS low
// Dummy read to throw away don't care value
SPI.transfer(0);
// Read window pixel 24 bit RGB values
uint8_t r = SPI.transfer(0);
uint8_t g = SPI.transfer(0);
uint8_t b = SPI.transfer(0);
CS_H;
spi_end();
return color565(r, g, b);
#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(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint16_t *data)
{
#if !defined(ESP32_PARALLEL)
if ((x > _width) || (y > _height) || (w == 0) || (h == 0)) return;
spi_begin();
readAddrWindow(x, y, x + w - 1, y + h - 1); // Sets CS low
// Dummy read to throw away don't care value
SPI.transfer(0);
// Read window pixel 24 bit RGB values
uint32_t len = w * h;
while (len--) {
// 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 = SPI.transfer(0);
uint8_t g = SPI.transfer(0);
uint8_t b = SPI.transfer(0);
// Swapped colour byte order for compatibility with pushRect()
*data++ = (r & 0xF8) | (g & 0xE0) >> 5 | (b & 0xF8) << 5 | (g & 0x1C) << 11;
}
// Write NOP command to stop read mode
//DC_C;
//SPI.transfer(TFT_NOP);
//DC_D;
CS_H;
spi_end();
#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(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint16_t *data)
{
#if !defined(ESP32_PARALLEL)
if ((x > _width) || (y > _height) || (w == 0) || (h == 0)) return;
spi_begin();
setAddrWindow(x, y, x + w - 1, y + h - 1); // Sets CS low and sent RAMWR
uint32_t len = w * h * 2;
// Push pixels into window rectangle, data is a 16 bit pointer thus increment is halved
while ( len >=32 ) {SPI.writeBytes((uint8_t*)data, 32); data += 16; len -= 32; }
if (len) SPI.writeBytes((uint8_t*)data, len);
CS_H;
spi_end();
#endif
}
/***************************************************************************************
** Function name: read rectangle (for SPI Interface II i.e. IM [3:0] = "1101")
** Description: Read RGB pixel colours from a defined area
***************************************************************************************/
// If w and h are 1, then 1 pixel is read, *data array size must be 3 bytes per pixel
void TFT_eSPI::readRectRGB(int32_t x0, int32_t y0, int32_t w, int32_t h, uint8_t *data)
{
#if !defined(ESP32_PARALLEL)
spi_begin();
readAddrWindow(x0, y0, x0 + w - 1, y0 + h - 1); // Sets CS low
// Dummy read to throw away don't care value
SPI.transfer(0);
// Read window pixel 24 bit RGB values, buffer must be set in sketch to 3 * w * h
uint32_t len = w * h;
while (len--) {
// 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
*data++ = SPI.transfer(0);
*data++ = SPI.transfer(0);
*data++ = SPI.transfer(0);
}
CS_H;
spi_end();
#endif
}
/***************************************************************************************
** Function name: drawCircle
** Description: Draw a circle outline
***************************************************************************************/
/*
// Midpoint circle algorithm, we can optimise this since y = 0 on first pass
// and we can eliminate the multiply as well
void TFT_eSPI::drawCircle(int32_t x0, int32_t y0, int32_t radius, uint32_t color)
{
int32_t x = radius;
int32_t y = 0;
int32_t err = 0;
while (x >= y)
{
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 + x, y0 - y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 + y, y0 + x, color);
drawPixel(x0 + y, y0 - x, color);
drawPixel(x0 - y, y0 - x, color);
drawPixel(x0 - y, y0 + x, color);
if (err <= 0)
{
y += 1;
err += 2*y + 1;
}
if (err > 0)
{
x -= 1;
err -= 2*x + 1;
}
}
}
*/
// Optimised midpoint circle algorithm
void TFT_eSPI::drawCircle(int32_t x0, int32_t y0, int32_t r, uint32_t color)
{
int32_t x = 0;
int32_t dx = 1;
int32_t dy = r+r;
int32_t p = -(r>>1);
spi_begin();
inTransaction = true;
// These are ordered to minimise coordinate changes in x or y
// drawPixel can then send fewer bounding box commands
drawPixel(x0 + r, y0, color);
drawPixel(x0 - r, y0, color);
drawPixel(x0, y0 - r, color);
drawPixel(x0, y0 + r, color);
while(x<r){
if(p>=0) {
dy-=2;
p-=dy;
r--;
}
dx+=2;
p+=dx;
x++;
// These are ordered to minimise coordinate changes in x or y
// drawPixel can then send fewer bounding box commands
drawPixel(x0 + x, y0 + r, color);
drawPixel(x0 - x, y0 + r, color);
drawPixel(x0 - x, y0 - r, color);
drawPixel(x0 + x, y0 - r, color);
drawPixel(x0 + r, y0 + x, color);
drawPixel(x0 - r, y0 + x, color);
drawPixel(x0 - r, y0 - x, color);
drawPixel(x0 + r, y0 - x, color);
}
inTransaction = false;
spi_end();
}
/***************************************************************************************
** Function name: drawCircleHelper
** Description: Support function for circle drawing
***************************************************************************************/
void TFT_eSPI::drawCircleHelper( int32_t x0, int32_t y0, int32_t r, uint8_t cornername, uint32_t color)
{
int32_t f = 1 - r;
int32_t ddF_x = 1;
int32_t ddF_y = -2 * r;
int32_t x = 0;
while (x < r) {
if (f >= 0) {
r--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x4) {
drawPixel(x0 + x, y0 + r, color);
drawPixel(x0 + r, y0 + x, color);
}
if (cornername & 0x2) {
drawPixel(x0 + x, y0 - r, color);
drawPixel(x0 + r, y0 - x, color);
}
if (cornername & 0x8) {
drawPixel(x0 - r, y0 + x, color);
drawPixel(x0 - x, y0 + r, color);
}
if (cornername & 0x1) {
drawPixel(x0 - r, y0 - x, color);
drawPixel(x0 - x, y0 - r, color);
}
}
}
/***************************************************************************************
** Function name: fillCircle
** Description: draw a filled circle
***************************************************************************************/
/*
void TFT_eSPI::fillCircle(int32_t x0, int32_t y0, int32_t r, uint32_t color)
{
drawFastVLine(x0, y0 - r, r + r + 1, color);
fillCircleHelper(x0, y0, r, 3, 0, color);
}
*/
// Optimised midpoint circle algorithm
void TFT_eSPI::fillCircle(int32_t x0, int32_t y0, int32_t r, uint32_t color)
{
int32_t x = 0;
int32_t dx = 1;
int32_t dy = r+r;
int32_t p = -(r>>1);
spi_begin();
inTransaction = true;
drawFastVLine(x0, y0 - r, dy+1, color);
while(x<r){
if(p>=0) {
dy-=2;
p-=dy;
r--;
}
dx+=2;
p+=dx;
x++;
drawFastVLine(x0 + x, y0 - r, 2 * r+1, color);
drawFastVLine(x0 - x, y0 - r, 2 * r+1, color);
drawFastVLine(x0 + r, y0 - x, 2 * x+1, color);
drawFastVLine(x0 - r, y0 - x, 2 * x+1, color);
}
inTransaction = false;
spi_end();
}
/*
// Another algorithm, this one tends to produce less pretty circles with odd edge pixels
void TFT_eSPI::fillCircle(int32_t x, int32_t y, int32_t r, uint32_t color)
{
for (int y1 = -r; y1 <= 0; y1++)
for (int x1 = -r; x1 <= 0; x1++)
if (x1 * x1 + y1 * y1 <= r * r)
{
drawFastHLine(x + x1, y + y1, 2 * (-x1), color);
drawFastHLine(x + x1, y - y1, 2 * (-x1), color);
break;
}
}
*/
/***************************************************************************************
** Function name: fillCircleHelper
** Description: Support function for filled circle drawing
***************************************************************************************/
// Used to support drawing roundrects
void TFT_eSPI::fillCircleHelper(int32_t x0, int32_t y0, int32_t r, uint8_t cornername, int32_t delta, uint32_t color)
{
int32_t f = 1 - r;
int32_t ddF_x = 1;
int32_t ddF_y = -r - r;
int32_t x = 0;
delta++;
while (x < r) {
if (f >= 0) {
r--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x1) {
drawFastVLine(x0 + x, y0 - r, r + r + delta, color);
drawFastVLine(x0 + r, y0 - x, x + x + delta, color);
}
if (cornername & 0x2) {
drawFastVLine(x0 - x, y0 - r, r + r + delta, color);
drawFastVLine(x0 - r, y0 - x, x + x + delta, color);
}
}
}
/***************************************************************************************
** Function name: drawEllipse
** Description: Draw a ellipse outline
***************************************************************************************/
void TFT_eSPI::drawEllipse(int16_t x0, int16_t y0, int16_t rx, int16_t ry, uint16_t color)
{
if (rx<2) return;
if (ry<2) return;
int32_t x, y;
int32_t rx2 = rx * rx;
int32_t ry2 = ry * ry;
int32_t fx2 = 4 * rx2;
int32_t fy2 = 4 * ry2;
int32_t s;
spi_begin();
inTransaction = true;
for (x = 0, y = ry, s = 2*ry2+rx2*(1-2*ry); ry2*x <= rx2*y; x++)
{
// These are ordered to minimise coordinate changes in x or y
// drawPixel can then send fewer bounding box commands
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 + x, y0 - y, color);
if (s >= 0)
{
s += fx2 * (1 - y);
y--;
}
s += ry2 * ((4 * x) + 6);
}
for (x = rx, y = 0, s = 2*rx2+ry2*(1-2*rx); rx2*y <= ry2*x; y++)
{
// These are ordered to minimise coordinate changes in x or y
// drawPixel can then send fewer bounding box commands
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 + x, y0 - y, color);
if (s >= 0)
{
s += fy2 * (1 - x);
x--;
}
s += rx2 * ((4 * y) + 6);
}
inTransaction = false;
spi_end();
}
/***************************************************************************************
** Function name: fillEllipse
** Description: draw a filled ellipse
***************************************************************************************/
void TFT_eSPI::fillEllipse(int16_t x0, int16_t y0, int16_t rx, int16_t ry, uint16_t color)
{
if (rx<2) return;
if (ry<2) return;
int32_t x, y;