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ubitxv6/PDQ_MinLib/PDQ_ILI9341.h
Reed Nightingale e0a963f9ed PDQ driver is working, but renders a little funny
2019-12-31 17:31:05 -08:00

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// This is the PDQ re-mixed version of Adafruit's library
// here is the original copyright notice:
/***************************************************
This is an Arduino Library for the Adafruit 2.2" SPI display.
This library works with the Adafruit 2.2" TFT Breakout w/SD card
----> http://www.adafruit.com/products/1480
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to
interface (RST is optional)
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
//===============================================================
// This PDQ optimized version is by Xark
//
// Inspiration from Paul Stoffregen and the Teensy 3.1 community.
//
// GOALS:
// 1) Maintain "sketch" compatibility with original Adafruit libraries.
// 2) Be as much faster as is reasonably possible honoring goal 1. :-)
// 3) Be at least as small as Adafruit libraries.
//
// I believe all three of these have largely been achieved:
// 1) Near full compatibility. Only minor initialization changes in original sketch.
// 2) Between ~2.5 and ~12 times faster (fillRect ~2.5x, drawLine ~12x).
// An average of ~4x faster over entire "graphictest.ino" benchmark.
//
// Even if this library is faster, it was based on the Adafruit original.
// Adafruit deserves your support for making their library open-source (and
// for having some nice LCD modules and all kinds of other great parts too).
// Consider giving them your support if possible!
#if !defined(_PDQ_ILI9341H_)
#define _PDQ_ILI9341H_
#include "Arduino.h"
#include "Print.h"
#include "PDQ_GFX.h"
#include <avr/pgmspace.h>
#if !defined(ILI9341_CS_PIN) || !defined(ILI9341_DC_PIN)
#error Oops! You need to #include "PDQ_ILI9341_config.h" (modified with your pin configuration and options) from your sketch before #include "PDQ_ILI9341.h".
#endif
#include "PDQ_FastPin.h"
#if !defined(__AVR_ATtiny85__) && !defined(__AVR_ATtiny45__)
#define INLINE inline
#define INLINE_OPT __attribute__((always_inline))
#else
#define INLINE
#define INLINE_OPT
#endif
// Color definitions
enum
{
ILI9341_BLACK = 0x0000,
ILI9341_BLUE = 0x001F,
ILI9341_RED = 0xF800,
ILI9341_GREEN = 0x07E0,
ILI9341_CYAN = 0x07FF,
ILI9341_MAGENTA = 0xF81F,
ILI9341_YELLOW = 0xFFE0,
ILI9341_WHITE = 0xFFFF,
};
class PDQ_ILI9341 : public PDQ_GFX<PDQ_ILI9341>
{
public:
// ILI9341 commands
// For datasheet see https://www.adafruit.com/products/1480
enum
{
ILI9341_NOP = 0x00,
ILI9341_SWRESET = 0x01,
ILI9341_RDDID = 0x04,
ILI9341_RDDST = 0x09,
ILI9341_SLPIN = 0x10,
ILI9341_SLPOUT = 0x11,
ILI9341_PTLON = 0x12,
ILI9341_NORON = 0x13,
ILI9341_RDMODE = 0x0A,
ILI9341_RDMADCTL = 0x0B,
ILI9341_RDPIXFMT = 0x0C,
ILI9341_RDIMGFMT = 0x0A,
ILI9341_RDSELFDIAG = 0x0F,
ILI9341_INVOFF = 0x20,
ILI9341_INVON = 0x21,
ILI9341_GAMMASET = 0x26,
ILI9341_DISPOFF = 0x28,
ILI9341_DISPON = 0x29,
ILI9341_CASET = 0x2A,
ILI9341_PASET = 0x2B,
ILI9341_RAMWR = 0x2C,
ILI9341_RAMRD = 0x2E,
ILI9341_PTLAR = 0x30,
ILI9341_MADCTL = 0x36,
ILI9341_PIXFMT = 0x3A,
ILI9341_FRMCTR1 = 0xB1,
ILI9341_FRMCTR2 = 0xB2,
ILI9341_FRMCTR3 = 0xB3,
ILI9341_INVCTR = 0xB4,
ILI9341_DFUNCTR = 0xB6,
ILI9341_PWCTR1 = 0xC0,
ILI9341_PWCTR2 = 0xC1,
ILI9341_PWCTR3 = 0xC2,
ILI9341_PWCTR4 = 0xC3,
ILI9341_PWCTR5 = 0xC4,
ILI9341_VMCTR1 = 0xC5,
ILI9341_VMCTR2 = 0xC7,
ILI9341_RDID1 = 0xDA,
ILI9341_RDID2 = 0xDB,
ILI9341_RDID3 = 0xDC,
ILI9341_RDID4 = 0xDD,
ILI9341_GMCTRP1 = 0xE0,
ILI9341_GMCTRN1 = 0xE1,
// ILI9341_PWCTR6 = 0xFC,
};
// some other misc. constants
enum
{
// screen dimensions
ILI9341_TFTWIDTH = 240,
ILI9341_TFTHEIGHT = 320,
// MADCTL bits
ILI9341_MADCTL_MH = 0x04, // bit 2 = 0 for refresh left -> right, 1 for refresh right -> left
ILI9341_MADCTL_RGB = 0x00, // bit 3 = 0 for RGB color order
ILI9341_MADCTL_BGR = 0x08, // bit 3 = 1 for BGR color order
ILI9341_MADCTL_ML = 0x10, // bit 4 = 0 for refresh top -> bottom, 1 for bottom -> top
ILI9341_MADCTL_MV = 0x20, // bit 5 = 0 for column, row order (portrait), 1 for row, column order (landscape)
ILI9341_MADCTL_MX = 0x40, // bit 6 = 0 for left -> right, 1 for right -> left order
ILI9341_MADCTL_MY = 0x80, // bit 7 = 0 for top -> bottom, 1 for bottom -> top
// delay indicator bit for commandList()
DELAY = 0x80
};
// higher-level routines
PDQ_ILI9341();
static void inline begin(void);
static void setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
static void pushColor(uint16_t color);
static void pushColor(uint16_t color, int cnt);
// Pass 8-bit (each) R,G,B, get back 16-bit packed color
static INLINE uint16_t color565(uint8_t r, uint8_t g, uint8_t b)
{
return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
}
static INLINE uint16_t Color565(uint8_t r, uint8_t g, uint8_t b) // older inconsistent name for compatibility
{
return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
}
// required driver primitive methods (all except drawPixel can call generic version in PDQ_GFX with "_" postfix).
static void drawPixel(int x, int y, uint16_t color);
static void drawFastVLine(int x, int y, int h, uint16_t color);
static void drawFastHLine(int x, int y, int w, uint16_t color);
static void setRotation(uint8_t r);
static void invertDisplay(boolean i);
static inline void fillScreen(uint16_t color) __attribute__((always_inline))
{
fillScreen_(color); // call generic version
}
static void drawLine(int x0, int y0, int x1, int y1, uint16_t color);
static void fillRect(int x, int y, int w, int h, uint16_t color);
// === lower-level internal routines =========
static void commandList(const uint8_t *addr);
// NOTE: Make sure each spi_begin() is matched with a single spi_end() (and don't call either twice)
// set CS back to low (LCD selected)
static inline void spi_begin() __attribute__((always_inline))
{
#if ILI9341_SAVE_SPCR && defined(AVR_HARDWARE_SPI)
swapValue(save_SPCR, SPCR); // swap initial/current SPCR settings
#endif
FastPin<ILI9341_CS_PIN>::lo(); // CS <= LOW (selected)
}
// NOTE: Make sure each spi_begin() is matched with a single spi_end() (and don't call either twice)
// reset CS back to high (LCD unselected)
static inline void spi_end() __attribute__((always_inline))
{
FastPin<ILI9341_CS_PIN>::hi(); // CS <= HIGH (deselected)
#if ILI9341_SAVE_SPCR && defined(AVR_HARDWARE_SPI)
swapValue(SPCR, save_SPCR); // swap current/initial SPCR settings
#endif
}
#if defined(AVR_HARDWARE_SPI)
// 10 cycle delay (including "call")
static void delay10() __attribute__((noinline)) __attribute__((naked))
{
__asm__ __volatile__
(
// +4 (call to get here)
#if !defined(__AVR_HAVE_RAMPD__)
" adiw r24,0\n" // +2 (2-cycle NOP)
#else
" nop\n" // +1 (1-cycle NOP)
#endif
" ret\n" // +4 (or +5 on >64KB AVR with RAMPD reg)
// = 10 cycles
: : :
);
}
// 13 cycle delay (including "call")
static void delay13() __attribute__((noinline)) __attribute__((naked))
{
__asm__ __volatile__
(
// +4 (call to get here)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
#if !defined(__AVR_HAVE_RAMPD__)
" nop\n" // +1 (1-cycle NOP)
#endif
" ret\n" // +4 (or +5 on >64KB AVR with RAMPD reg)
// = 13 cycles
: : :
);
}
// 15 cycle delay (including "call")
static void delay15() __attribute__((noinline)) __attribute__((naked))
{
__asm__ __volatile__
(
// +4 (call to get here)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
#if !defined(__AVR_HAVE_RAMPD__)
" nop\n" // +1 (1-cycle NOP)
#endif
" ret\n" // +4 (or +5 on >64KB AVR with RAMPD reg)
// = 15 cycles
: : :
);
}
// 17 cycle delay (including "call")
static void delay17() __attribute__((noinline)) __attribute__((naked))
{
__asm__ __volatile__
(
// +4 (call to get here)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
" adiw r24,0\n" // +2 (2-cycle NOP)
#if !defined(__AVR_HAVE_RAMPD__)
" nop\n" // +1 (2-cycle NOP)
#endif
" ret\n" // +4 (or +5 on >64KB AVR with RAMPD reg)
// = 17 cycles
: : :
);
}
// normal SPI write with minimal hand-tuned delay (assuming max DIV2 SPI rate)
static INLINE void spiWrite(uint8_t data) INLINE_OPT
{
SPDR = data;
__asm__ __volatile__
(
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
: : :
);
}
// special SPI write with minimal hand-tuned delay (assuming max DIV2 SPI rate) - minus 2 cycles for RS (etc.) change
static INLINE void spiWrite_preCmd(uint8_t data) INLINE_OPT
{
SPDR = data;
__asm__ __volatile__
(
" call _ZN11PDQ_ILI93417delay15Ev\n" // call mangled delay15 (compiler would needlessly save/restore regs)
: : :
);
}
// SPI 16-bit write with minimal hand-tuned delay (assuming max DIV2 SPI rate)
static INLINE void spiWrite16(uint16_t data) INLINE_OPT
{
uint8_t temp;
__asm__ __volatile__
(
" out %[spi],%[hi]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
" out %[spi],%[lo]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
: [temp] "=d" (temp)
: [spi] "i" (_SFR_IO_ADDR(SPDR)), [lo] "r" ((uint8_t)data), [hi] "r" ((uint8_t)(data>>8))
:
);
}
// SPI 16-bit write with minimal hand-tuned delay (assuming max DIV2 SPI rate) minus 2 cycles
static INLINE void spiWrite16_preCmd(uint16_t data) INLINE_OPT
{
uint8_t temp;
__asm__ __volatile__
(
" out %[spi],%[hi]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
" out %[spi],%[lo]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay15Ev\n" // call mangled delay15 (compiler would needlessly save/restore regs)
: [temp] "=d" (temp)
: [spi] "i" (_SFR_IO_ADDR(SPDR)), [lo] "r" ((uint8_t)data), [hi] "r" ((uint8_t)(data>>8))
:
);
}
// SPI 16-bit write with minimal hand-tuned delay (assuming max DIV2 SPI rate) minus 4 cycles
static INLINE void spiWrite16_lineDraw(uint16_t data) INLINE_OPT
{
uint8_t temp;
__asm__ __volatile__
(
" out %[spi],%[hi]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
" out %[spi],%[lo]\n" // write SPI data (18 cycles until next write)
: [temp] "=d" (temp)
: [spi] "i" (_SFR_IO_ADDR(SPDR)), [lo] "r" ((uint8_t)data), [hi] "r" ((uint8_t)(data>>8))
:
);
}
// normal SPI write with minimal hand-tuned delay (assuming max DIV2 SPI rate)
static INLINE void spiWrite16(uint16_t data, int count) INLINE_OPT
{
uint8_t temp;
__asm__ __volatile__
(
" sbiw %[count],0\n" // test count
" brmi 4f\n" // if < 0 then done
" breq 4f\n" // if == 0 then done
"1: out %[spi],%[hi]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay17Ev\n" // call mangled delay17 (compiler would needlessly save/restore regs)
" out %[spi],%[lo]\n" // write SPI data (18 cycles until next write)
" call _ZN11PDQ_ILI93417delay13Ev\n" // call mangled delay13 (compiler would needlessly save/restore regs)
" sbiw %[count],1\n" // +2 decrement count
" brne 1b\n" // +2/1 if != 0 then loop
// = 13 + 2 + 2 (17 cycles)
"4:\n"
: [temp] "=d" (temp), [count] "+w" (count)
: [spi] "i" (_SFR_IO_ADDR(SPDR)), [lo] "r" ((uint8_t)data), [hi] "r" ((uint8_t)(data>>8))
:
);
}
#else // bit-bang
#if defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny45__)
// USI hardware assisted
static void spiWrite(uint8_t data) __attribute__((noinline))
{
USIDR = data;
__asm__ __volatile__
(
" out %[spi],%[clkp0]\n" // MSB
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n" // LSB
" out %[spi],%[clkp1]\n"
:
: [spi] "i" (_SFR_IO_ADDR(USICR)), [clkp0] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC))), [clkp1] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC)|(1<<USICLK)))
:
);
}
static void spiWrite16(uint16_t data) __attribute__((noinline))
{
USIDR = data>>8;
__asm__ __volatile__
(
" out %[spi],%[clkp0]\n" // MSB
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n" // LSB
" out %[spi],%[clkp1]\n"
:
: [spi] "i" (_SFR_IO_ADDR(USICR)), [clkp0] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC))), [clkp1] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC)|(1<<USICLK)))
:
);
USIDR = data&0xff;
__asm__ __volatile__
(
" out %[spi],%[clkp0]\n" // MSB
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n"
" out %[spi],%[clkp1]\n"
" out %[spi],%[clkp0]\n" // LSB
" out %[spi],%[clkp1]\n"
:
: [spi] "i" (_SFR_IO_ADDR(USICR)), [clkp0] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC))), [clkp1] "a" ((uint8_t)((1<<USIWM0)|(0<<USICS0)|(1<<USITC)|(1<<USICLK)))
:
);
}
#else
static void spiWrite(uint8_t data) __attribute__((noinline))
{
// Fast SPI bitbang swiped from LPD8806 library
for(uint8_t bit = 0x80; bit; bit >>= 1)
{
if (data & bit)
FastPin<ILI9341_MOSI_PIN>::hi();
else
FastPin<ILI9341_MOSI_PIN>::lo();
FastPin<ILI9341_SCLK_PIN>::hi();
FastPin<ILI9341_SCLK_PIN>::lo();
}
}
static void spiWrite16(uint16_t data) __attribute__((noinline))
{
spiWrite(data >> 8);
spiWrite(data & 0xff);
}
#endif
static INLINE void spiWrite_preCmd(uint8_t data) INLINE_OPT
{
spiWrite(data);
}
static INLINE void spiWrite16_preCmd(uint16_t data) INLINE_OPT
{
spiWrite16(data);
}
static INLINE void spiWrite16_lineDraw(uint16_t data) INLINE_OPT
{
spiWrite16(data);
}
static INLINE void spiWrite16(uint16_t data, int count) INLINE_OPT
{
while (count-- > 0)
spiWrite16(data);
}
static inline void delay10() { }
static inline void delay13() { }
static inline void delay15() { }
static inline void delay17() { }
#endif
// write SPI byte with RS (aka D/C) pin set low to indicate a command byte (and then reset back to high when done)
static INLINE void writeCommand(uint8_t data) INLINE_OPT
{
FastPin<ILI9341_DC_PIN>::lo(); // RS <= LOW indicate command byte
spiWrite_preCmd(data);
FastPin<ILI9341_DC_PIN>::hi(); // RS <= HIGH indicate data byte (always assumed left in data mode)
}
// write SPI byte with RS assumed low indicating a data byte
static inline void writeData(uint8_t data) __attribute__((always_inline))
{
spiWrite(data);
}
// internal version that does not spi_begin()/spi_end()
static INLINE void setAddrWindow_(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) INLINE_OPT
{
writeCommand(ILI9341_CASET); // column address set
spiWrite16(x0); // XSTART
spiWrite16_preCmd(x1); // XEND
writeCommand(ILI9341_PASET); // row address set
spiWrite16(y0); // YSTART
spiWrite16_preCmd(y1); // YEND
writeCommand(ILI9341_RAMWR); // write to RAM
}
#if ILI9341_SAVE_SPCR && defined(AVR_HARDWARE_SPI)
static volatile uint8_t save_SPCR; // initial SPCR value/saved SPCR value (swapped in spi_begin/spi_end)
#endif
};
typedef PDQ_GFX_Button_<PDQ_ILI9341> PDQ_GFX_Button;
/***************************************************
This is an Arduino Library for the Adafruit 2.2" SPI display.
This library works with the Adafruit 2.2" TFT Breakout w/SD card
----> http://www.adafruit.com/products/1480
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to
interface (RST is optional)
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
#if ILI9341_SAVE_SPCR && defined(AVR_HARDWARE_SPI)
// static data needed by base class
volatile uint8_t PDQ_ILI9341::save_SPCR;
#endif
// Constructor when using hardware SPI.
PDQ_ILI9341::PDQ_ILI9341() : PDQ_GFX<PDQ_ILI9341>(ILI9341_TFTWIDTH, ILI9341_TFTHEIGHT)
{
#if defined(AVR_HARDWARE_SPI)
// must reference these functions from C++ or they will be stripped by linker (called from inline asm)
delay10();
delay13();
delay15();
delay17();
#endif
}
// Companion code to the above tables. Reads and issues
// a series of LCD commands stored in PROGMEM byte array.
void PDQ_ILI9341::commandList(const uint8_t *addr)
{
uint8_t numCommands, numArgs;
uint16_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 & DELAY; // If hibit set, delay follows args
numArgs &= ~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)
if(ms == 255)
ms = 500; // If 255, delay for 500 ms
delay(ms);
}
}
}
void PDQ_ILI9341::begin(void)
{
// set CS and RS pin directions to output
FastPin<ILI9341_CS_PIN>::setOutput();
FastPin<ILI9341_DC_PIN>::setOutput();
#if !defined(AVR_HARDWARE_SPI)
#if defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
USICR = (0<<USISIE)|(0<<USIOIE)|(0<<USIWM1)|(1<<USIWM0)|(0<<USICS1)|(1<<USICS0)|(1<<USICLK)|(0<<USITC);
#endif
#if defined (ILI9341_MISO_PIN)
FastPin<ILI9341_MISO_PIN>::setInput();
#endif
FastPin<ILI9341_MOSI_PIN>::setOutput();
FastPin<ILI9341_SCLK_PIN>::setOutput();
FastPin<ILI9341_MOSI_PIN>::lo();
FastPin<ILI9341_SCLK_PIN>::lo();
#endif
FastPin<ILI9341_CS_PIN>::hi(); // CS <= HIGH (deselected, so no spurious data)
FastPin<ILI9341_DC_PIN>::hi(); // RS <= HIGH (default data byte)
#if defined(AVR_HARDWARE_SPI)
#if ILI9341_SAVE_SPCR
uint8_t oldSPCR = SPCR; // save initial SPCR settings
#endif
SPI.begin();
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
SPI.setClockDivider(SPI_CLOCK_DIV2); // 8 MHz (full! speed!) [1 byte every 18 cycles]
#endif
#if ILI9341_SAVE_SPCR && defined(AVR_HARDWARE_SPI)
save_SPCR = SPCR; // save SPCR settings
SPCR = oldSPCR; // restore previous SPCR settings (spi_begin/spi_end will switch between the two)
#endif
spi_begin();
// Initialization commands for ILI9341 screens
static const uint8_t ILI9341_cmds[] PROGMEM =
{
22,
ILI9341_SWRESET, DELAY, // 1
5,
0xEF, 3, // 2
0x03, 0x80, 0x02,
0xCF, 3, // 3
0x00, 0xC1, 0x30,
0xED, 4, // 4
0x64, 0x03, 0x12, 0x81,
0xE8, 3, // 5
0x85, 0x00, 0x78,
0xCB, 5, // 6
0x39, 0x2C, 0x00, 0x34, 0x02,
0xF7, 1, // 7
0x20,
0xEA, 2, // 8
0x00, 0x00,
ILI9341_PWCTR1, 1, // 9 power control
0x23, // VRH[5:0]
ILI9341_PWCTR2, 1, // 10 power control
0x10, // SAP[2:0];BT[3:0]
ILI9341_VMCTR1, 2, // 11 VCM control
0x3e, 0x28,
ILI9341_VMCTR2, 1, // 12 VCM control2
0x86, // --
ILI9341_MADCTL, 1, // 13
(ILI9341_MADCTL_MX | ILI9341_MADCTL_BGR),
ILI9341_PIXFMT, 1, // 14
0x55,
ILI9341_FRMCTR1, 2, // 15
0x00, 0x18,
ILI9341_DFUNCTR, 3, // 16
0x08, 0x82, 0x27,
0xF2, 1, // 17 3Gamma Function Disable
0x00,
ILI9341_GAMMASET, 1, // 18 Gamma curve selected
0x01,
ILI9341_GMCTRP1, 15, // 19 Set Gamma
0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
ILI9341_GMCTRN1, 15, // 20
0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
ILI9341_SLPOUT, DELAY, // 21
120,
ILI9341_DISPON, 0, // 22
};
commandList(ILI9341_cmds);
spi_end();
}
void PDQ_ILI9341::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
{
spi_begin();
setAddrWindow_(x0, y0, x1, y1);
spi_end();
}
void PDQ_ILI9341::pushColor(uint16_t color)
{
spi_begin();
spiWrite16_preCmd(color);
spi_end();
}
void PDQ_ILI9341::pushColor(uint16_t color, int count)
{
spi_begin();
spiWrite16(color, count);
spi_end();
}
void PDQ_ILI9341::drawPixel(int x, int y, uint16_t color)
{
if ((x < 0) ||(x >= _width) || (y < 0) || (y >= _height))
return;
spi_begin();
setAddrWindow_(x, y, x, y);
spiWrite16_preCmd(color);
spi_end();
}
void PDQ_ILI9341::drawFastVLine(int x, int y, int h, uint16_t color)
{
// clipping
if ((x < 0) || (x >= _width) || (y >= _height))
return;
if (y < 0)
{
h += y;
y = 0;
}
int y1 = y+h;
if (y1 < 0)
return;
if (y1 > _height)
h = _height-y;
spi_begin();
setAddrWindow_(x, y, x, _height);
spiWrite16(color, h);
spi_end();
}
void PDQ_ILI9341::drawFastHLine(int x, int y, int w, uint16_t color)
{
// clipping
if ((x >= _width) || (y < 0) || (y >= _height))
return;
if (x < 0)
{
w += x;
x = 0;
}
int x1 = x+w;
if (x1 < 0)
return;
if (x1 > _width)
w = _width-w;
spi_begin();
setAddrWindow_(x, y, _width, y);
spiWrite16(color, w);
spi_end();
}
void PDQ_ILI9341::fillRect(int x, int y, int w, int h, uint16_t color)
{
// rudimentary clipping (drawChar w/big text requires this)
if ((x >= _width) || (y >= _height))
return;
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;
spi_begin();
setAddrWindow_(x, y, x+w-1, _height);
for (; h > 0; h--)
{
spiWrite16(color, w);
}
spi_end();
}
// Bresenham's algorithm - thx Wikipedia
void PDQ_ILI9341::drawLine(int x0, int y0, int x1, int y1, uint16_t color)
{
#if 0 && defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny45__)
drawLine_(x0, y0, x1, y1, color);
#else
int8_t steep = abs(y1 - y0) > abs(x1 - x0);
if (steep)
{
swapValue(x0, y0);
swapValue(x1, y1);
}
if (x0 > x1)
{
swapValue(x0, x1);
swapValue(y0, y1);
}
if (x1 < 0)
return;
int dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int err = dx / 2;
int8_t ystep;
if (y0 < y1)
{
ystep = 1;
}
else
{
ystep = -1;
}
uint8_t setaddr = 1;
#if 0 && defined(__AVR_ATtiny85__) && !defined(__AVR_ATtiny45__)
int end = steep ? _height-1 : _width-1;
if (x1 > end)
x1 = end;
for (; x0 <= x1; x0++)
{
if ((x0 >= 0) && (y0 >= 0) && (y0 <= end))
break;
err -= dy;
if (err < 0)
{
err += dx;
y0 += ystep;
}
}
if (x0 > x1)
return;
spi_begin();
for (; x0 <= x1; x0++)
{
if (setaddr)
{
if (steep)
setAddrWindow_(y0, x0, y0, end+1);
else
setAddrWindow_(x0, y0, end+1, y0);
setaddr = 0;
}
spiWrite16_lineDraw(color);
err -= dy;
if (err < 0)
{
y0 += ystep;
if ((y0 < 0) || (y0 > end))
break;
err += dx;
setaddr = 1;
}
}
#else
if (steep) // y increments every iteration (y0 is x-axis, and x0 is y-axis)
{
if (x1 >= _height)
x1 = _height - 1;
for (; x0 <= x1; x0++)
{
if ((x0 >= 0) && (y0 >= 0) && (y0 < _width))
break;
err -= dy;
if (err < 0)
{
err += dx;
y0 += ystep;
}
}
if (x0 > x1)
return;
spi_begin();
for (; x0 <= x1; x0++)
{
if (setaddr)
{
setAddrWindow_(y0, x0, y0, _height);
setaddr = 0;
}
spiWrite16_lineDraw(color);
err -= dy;
if (err < 0)
{
y0 += ystep;
if ((y0 < 0) || (y0 >= _width))
break;
err += dx;
setaddr = 1;
}
#if defined(AVR_HARDWARE_SPI)
else
{
__asm__ __volatile__
(
" call _ZN11PDQ_ILI93417delay10Ev\n"
: : :
);
}
#endif
}
}
else // x increments every iteration (x0 is x-axis, and y0 is y-axis)
{
if (x1 >= _width)
x1 = _width - 1;
for (; x0 <= x1; x0++)
{
if ((x0 >= 0) && (y0 >= 0) && (y0 < _height))
break;
err -= dy;
if (err < 0)
{
err += dx;
y0 += ystep;
}
}
if (x0 > x1)
return;
spi_begin();
for (; x0 <= x1; x0++)
{
if (setaddr)
{
setAddrWindow_(x0, y0, _width, y0);
setaddr = 0;
}
spiWrite16_lineDraw(color);
err -= dy;
if (err < 0)
{
y0 += ystep;
if ((y0 < 0) || (y0 >= _height))
break;
err += dx;
setaddr = 1;
}
#if defined(AVR_HARDWARE_SPI)
else
{
__asm__ __volatile__
(
" call _ZN11PDQ_ILI93417delay10Ev\n"
: : :
);
}
#endif
}
}
#endif
spi_end();
#endif
}
void PDQ_ILI9341::setRotation(uint8_t m)
{
rotation = (m & 3); // can't be higher than 3
spi_begin();
writeCommand(ILI9341_MADCTL);
switch (rotation)
{
default:
case 0:
writeData(ILI9341_MADCTL_MX | ILI9341_MADCTL_BGR);
_width = ILI9341_TFTWIDTH;
_height = ILI9341_TFTHEIGHT;
break;
case 1:
writeData(ILI9341_MADCTL_MV | ILI9341_MADCTL_BGR);
_width = ILI9341_TFTHEIGHT;
_height = ILI9341_TFTWIDTH;
break;
case 2:
writeData(ILI9341_MADCTL_MY | ILI9341_MADCTL_BGR);
_width = ILI9341_TFTWIDTH;
_height = ILI9341_TFTHEIGHT;
break;
case 3:
writeData(ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | ILI9341_MADCTL_MX | ILI9341_MADCTL_BGR);
_width = ILI9341_TFTHEIGHT;
_height = ILI9341_TFTWIDTH;
break;
}
spi_end();
}
void PDQ_ILI9341::invertDisplay(boolean i)
{
spi_begin();
writeCommand(i ? ILI9341_INVON : ILI9341_INVOFF);
spi_end();
}
#endif // !defined(_PDQ_ILI9341H_)
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