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ILI9341_t3.cpp
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// https://github.com/PaulStoffregen/ILI9341_t3
// http://forum.pjrc.com/threads/26305-Highly-optimized-ILI9341-(320x240-TFT-color-display)-library
/***************************************************
This is our library for the Adafruit ILI9341 Breakout and Shield
----> http://www.adafruit.com/products/1651
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
****************************************************/
#include "ILI9341_t3.h"
#include <SPI.h>
// Teensy 3.1 can only generate 30 MHz SPI when running at 120 MHz (overclock)
// At all other speeds, SPI.beginTransaction() will use the fastest available clock
#define SPICLOCK 30000000
#define WIDTH ILI9341_TFTWIDTH
#define HEIGHT ILI9341_TFTHEIGHT
// Constructor when using hardware SPI. Faster, but must use SPI pins
// specific to each board type (e.g. 11,13 for Uno, 51,52 for Mega, etc.)
ILI9341_t3::ILI9341_t3(uint8_t cs, uint8_t dc, uint8_t rst, uint8_t mosi, uint8_t sclk, uint8_t miso)
{
_cs = cs;
_dc = dc;
_rst = rst;
_mosi = mosi;
_sclk = sclk;
_miso = miso;
_width = WIDTH;
_height = HEIGHT;
rotation = 0;
cursor_y = cursor_x = 0;
textsize = 1;
textcolor = textbgcolor = 0xFFFF;
wrap = true;
font = NULL;
}
void ILI9341_t3::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x0, y0, x1, y1);
writecommand_last(ILI9341_RAMWR); // write to RAM
SPI.endTransaction();
}
void ILI9341_t3::pushColor(uint16_t color)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
writedata16_last(color);
SPI.endTransaction();
}
void ILI9341_t3::drawPixel(int16_t x, int16_t y, uint16_t color) {
if((x < 0) ||(x >= _width) || (y < 0) || (y >= _height)) return;
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x, y);
writecommand_cont(ILI9341_RAMWR);
writedata16_last(color);
SPI.endTransaction();
}
void ILI9341_t3::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
{
// Rudimentary clipping
if((x >= _width) || (y >= _height)) return;
if((y+h-1) >= _height) h = _height-y;
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x, y+h-1);
writecommand_cont(ILI9341_RAMWR);
while (h-- > 1) {
writedata16_cont(color);
}
writedata16_last(color);
SPI.endTransaction();
}
void ILI9341_t3::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
{
// Rudimentary clipping
if((x >= _width) || (y >= _height)) return;
if((x+w-1) >= _width) w = _width-x;
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x+w-1, y);
writecommand_cont(ILI9341_RAMWR);
while (w-- > 1) {
writedata16_cont(color);
}
writedata16_last(color);
SPI.endTransaction();
}
void ILI9341_t3::fillScreen(uint16_t color)
{
fillRect(0, 0, _width, _height, color);
}
// fill a rectangle
void ILI9341_t3::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
{
// rudimentary clipping (drawChar w/big text requires this)
if((x >= _width) || (y >= _height)) return;
if((x + w - 1) >= _width) w = _width - x;
if((y + h - 1) >= _height) h = _height - y;
// TODO: this can result in a very long transaction time
// should break this into multiple transactions, even though
// it'll cost more overhead, so we don't stall other SPI libs
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x+w-1, y+h-1);
writecommand_cont(ILI9341_RAMWR);
for(y=h; y>0; y--) {
for(x=w; x>1; x--) {
writedata16_cont(color);
}
writedata16_last(color);
if (y > 1 && (y & 1)) {
SPI.endTransaction();
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
}
}
SPI.endTransaction();
}
#define MADCTL_MY 0x80
#define MADCTL_MX 0x40
#define MADCTL_MV 0x20
#define MADCTL_ML 0x10
#define MADCTL_RGB 0x00
#define MADCTL_BGR 0x08
#define MADCTL_MH 0x04
void ILI9341_t3::setRotation(uint8_t m)
{
rotation = m % 4; // can't be higher than 3
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
writecommand_cont(ILI9341_MADCTL);
switch (rotation) {
case 0:
writedata8_last(MADCTL_MX | MADCTL_BGR);
_width = ILI9341_TFTWIDTH;
_height = ILI9341_TFTHEIGHT;
break;
case 1:
writedata8_last(MADCTL_MV | MADCTL_BGR);
_width = ILI9341_TFTHEIGHT;
_height = ILI9341_TFTWIDTH;
break;
case 2:
writedata8_last(MADCTL_MY | MADCTL_BGR);
_width = ILI9341_TFTWIDTH;
_height = ILI9341_TFTHEIGHT;
break;
case 3:
writedata8_last(MADCTL_MX | MADCTL_MY | MADCTL_MV | MADCTL_BGR);
_width = ILI9341_TFTHEIGHT;
_height = ILI9341_TFTWIDTH;
break;
}
SPI.endTransaction();
cursor_x = 0;
cursor_y = 0;
}
void ILI9341_t3::setScroll(uint16_t offset)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
writecommand_cont(ILI9341_VSCRSADD);
writedata16_last(offset);
SPI.endTransaction();
}
void ILI9341_t3::invertDisplay(boolean i)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
writecommand_last(i ? ILI9341_INVON : ILI9341_INVOFF);
SPI.endTransaction();
}
/*
uint8_t ILI9341_t3::readdata(void)
{
uint8_t r;
// Try to work directly with SPI registers...
// First wait until output queue is empty
uint16_t wTimeout = 0xffff;
while (((KINETISK_SPI0.SR) & (15 << 12)) && (--wTimeout)) ; // wait until empty
// KINETISK_SPI0.MCR |= SPI_MCR_CLR_RXF; // discard any received data
// KINETISK_SPI0.SR = SPI_SR_TCF;
// Transfer a 0 out...
writedata8_cont(0);
// Now wait until completed.
wTimeout = 0xffff;
while (((KINETISK_SPI0.SR) & (15 << 12)) && (--wTimeout)) ; // wait until empty
r = KINETISK_SPI0.POPR; // get the received byte... should check for it first...
return r;
}
*/
uint8_t ILI9341_t3::readcommand8(uint8_t c, uint8_t index)
{
uint16_t wTimeout = 0xffff;
uint8_t r=0;
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
while (((KINETISK_SPI0.SR) & (15 << 12)) && (--wTimeout)) ; // wait until empty
// Make sure the last frame has been sent...
KINETISK_SPI0.SR = SPI_SR_TCF; // dlear it out;
wTimeout = 0xffff;
while (!((KINETISK_SPI0.SR) & SPI_SR_TCF) && (--wTimeout)) ; // wait until it says the last frame completed
// clear out any current received bytes
wTimeout = 0x10; // should not go more than 4...
while ((((KINETISK_SPI0.SR) >> 4) & 0xf) && (--wTimeout)) {
r = KINETISK_SPI0.POPR;
}
//writecommand(0xD9); // sekret command
KINETISK_SPI0.PUSHR = 0xD9 | (pcs_command << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
// while (((KINETISK_SPI0.SR) & (15 << 12)) > (3 << 12)) ; // wait if FIFO full
// writedata(0x10 + index);
KINETISK_SPI0.PUSHR = (0x10 + index) | (pcs_data << 16) | SPI_PUSHR_CTAS(0);
// while (((KINETISK_SPI0.SR) & (15 << 12)) > (3 << 12)) ; // wait if FIFO full
// writecommand(c);
KINETISK_SPI0.PUSHR = c | (pcs_command << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
// while (((KINETISK_SPI0.SR) & (15 << 12)) > (3 << 12)) ; // wait if FIFO full
// readdata
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0);
// while (((KINETISK_SPI0.SR) & (15 << 12)) > (3 << 12)) ; // wait if FIFO full
// Now wait until completed.
wTimeout = 0xffff;
while (((KINETISK_SPI0.SR) & (15 << 12)) && (--wTimeout)) ; // wait until empty
// Make sure the last frame has been sent...
KINETISK_SPI0.SR = SPI_SR_TCF; // dlear it out;
wTimeout = 0xffff;
while (!((KINETISK_SPI0.SR) & SPI_SR_TCF) && (--wTimeout)) ; // wait until it says the last frame completed
wTimeout = 0x10; // should not go more than 4...
// lets get all of the values on the FIFO
while ((((KINETISK_SPI0.SR) >> 4) & 0xf) && (--wTimeout)) {
r = KINETISK_SPI0.POPR;
}
SPI.endTransaction();
return r; // get the received byte... should check for it first...
}
// Read Pixel at x,y and get back 16-bit packed color
uint16_t ILI9341_t3::readPixel(int16_t x, int16_t y)
{
uint8_t dummy __attribute__((unused));
uint8_t r,g,b;
SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
setAddr(x, y, x, y);
writecommand_cont(ILI9341_RAMRD); // read from RAM
waitTransmitComplete();
// Push 4 bytes over SPI
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_CONT;
waitFifoEmpty(); // wait for both queues to be empty.
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_CONT;
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_CONT;
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_EOQ;
// Wait for End of Queue
while ((KINETISK_SPI0.SR & SPI_SR_EOQF) == 0) ;
KINETISK_SPI0.SR = SPI_SR_EOQF; // make sure it is clear
// Read Pixel Data
dummy = KINETISK_SPI0.POPR; // Read a DUMMY byte of GRAM
r = KINETISK_SPI0.POPR; // Read a RED byte of GRAM
g = KINETISK_SPI0.POPR; // Read a GREEN byte of GRAM
b = KINETISK_SPI0.POPR; // Read a BLUE byte of GRAM
SPI.endTransaction();
return color565(r,g,b);
}
// Now lets see if we can read in multiple pixels
void ILI9341_t3::readRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t *pcolors)
{
uint8_t dummy __attribute__((unused));
uint8_t r,g,b;
uint16_t c = w * h;
SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
setAddr(x, y, x+w-1, y+h-1);
writecommand_cont(ILI9341_RAMRD); // read from RAM
waitTransmitComplete();
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_CONT | SPI_PUSHR_EOQ;
while ((KINETISK_SPI0.SR & SPI_SR_EOQF) == 0) ;
KINETISK_SPI0.SR = SPI_SR_EOQF; // make sure it is clear
while ((KINETISK_SPI0.SR & 0xf0)) {
dummy = KINETISK_SPI0.POPR; // Read a DUMMY byte but only once
}
c *= 3; // number of bytes we will transmit to the display
while (c--) {
if (c) {
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_CONT;
} else {
KINETISK_SPI0.PUSHR = 0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0)| SPI_PUSHR_EOQ;
}
// If last byte wait until all have come in...
if (c == 0) {
while ((KINETISK_SPI0.SR & SPI_SR_EOQF) == 0) ;
KINETISK_SPI0.SR = SPI_SR_EOQF; // make sure it is clear
}
if ((KINETISK_SPI0.SR & 0xf0) >= 0x30) { // do we have at least 3 bytes in queue if so extract...
r = KINETISK_SPI0.POPR; // Read a RED byte of GRAM
g = KINETISK_SPI0.POPR; // Read a GREEN byte of GRAM
b = KINETISK_SPI0.POPR; // Read a BLUE byte of GRAM
*pcolors++ = color565(r,g,b);
}
// like waitFiroNotFull but does not pop our return queue
while ((KINETISK_SPI0.SR & (15 << 12)) > (3 << 12)) ;
}
SPI.endTransaction();
}
// Now lets see if we can writemultiple pixels
void ILI9341_t3::writeRect(int16_t x, int16_t y, int16_t w, int16_t h, const uint16_t *pcolors)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x+w-1, y+h-1);
writecommand_cont(ILI9341_RAMWR);
for(y=h; y>0; y--) {
for(x=w; x>1; x--) {
writedata16_cont(*pcolors++);
}
writedata16_last(*pcolors++);
}
SPI.endTransaction();
}
static const uint8_t init_commands[] = {
4, 0xEF, 0x03, 0x80, 0x02,
4, 0xCF, 0x00, 0XC1, 0X30,
5, 0xED, 0x64, 0x03, 0X12, 0X81,
4, 0xE8, 0x85, 0x00, 0x78,
6, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
2, 0xF7, 0x20,
3, 0xEA, 0x00, 0x00,
2, ILI9341_PWCTR1, 0x23, // Power control
2, ILI9341_PWCTR2, 0x10, // Power control
3, ILI9341_VMCTR1, 0x3e, 0x28, // VCM control
2, ILI9341_VMCTR2, 0x86, // VCM control2
2, ILI9341_MADCTL, 0x48, // Memory Access Control
2, ILI9341_PIXFMT, 0x55,
3, ILI9341_FRMCTR1, 0x00, 0x18,
4, ILI9341_DFUNCTR, 0x08, 0x82, 0x27, // Display Function Control
2, 0xF2, 0x00, // Gamma Function Disable
2, ILI9341_GAMMASET, 0x01, // Gamma curve selected
16, ILI9341_GMCTRP1, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08,
0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, // Set Gamma
16, ILI9341_GMCTRN1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07,
0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, // Set Gamma
0
};
void ILI9341_t3::begin(void)
{
// verify SPI pins are valid;
if ((_mosi == 11 || _mosi == 7) && (_miso == 12 || _miso == 8) && (_sclk == 13 || _sclk == 14)) {
SPI.setMOSI(_mosi);
SPI.setMISO(_miso);
SPI.setSCK(_sclk);
} else
return; // not valid pins...
SPI.begin();
if (SPI.pinIsChipSelect(_cs, _dc)) {
pcs_data = SPI.setCS(_cs);
pcs_command = pcs_data | SPI.setCS(_dc);
} else {
pcs_data = 0;
pcs_command = 0;
return;
}
// toggle RST low to reset
if (_rst < 255) {
pinMode(_rst, OUTPUT);
digitalWrite(_rst, HIGH);
delay(5);
digitalWrite(_rst, LOW);
delay(20);
digitalWrite(_rst, HIGH);
delay(150);
}
/*
uint8_t x = readcommand8(ILI9341_RDMODE);
Serial.print("\nDisplay Power Mode: 0x"); Serial.println(x, HEX);
x = readcommand8(ILI9341_RDMADCTL);
Serial.print("\nMADCTL Mode: 0x"); Serial.println(x, HEX);
x = readcommand8(ILI9341_RDPIXFMT);
Serial.print("\nPixel Format: 0x"); Serial.println(x, HEX);
x = readcommand8(ILI9341_RDIMGFMT);
Serial.print("\nImage Format: 0x"); Serial.println(x, HEX);
x = readcommand8(ILI9341_RDSELFDIAG);
Serial.print("\nSelf Diagnostic: 0x"); Serial.println(x, HEX);
*/
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
const uint8_t *addr = init_commands;
while (1) {
uint8_t count = *addr++;
if (count-- == 0) break;
writecommand_cont(*addr++);
while (count-- > 0) {
writedata8_cont(*addr++);
}
}
writecommand_last(ILI9341_SLPOUT); // Exit Sleep
SPI.endTransaction();
delay(120);
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
writecommand_last(ILI9341_DISPON); // Display on
SPI.endTransaction();
}
/*
This is the core graphics library for all our displays, providing a common
set of graphics primitives (points, lines, circles, etc.). It needs to be
paired with a hardware-specific library for each display device we carry
(to handle the lower-level functions).
Adafruit invests time and resources providing this open source code, please
support Adafruit & open-source hardware by purchasing products from Adafruit!
Copyright (c) 2013 Adafruit Industries. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
//#include "glcdfont.c"
extern "C" const unsigned char glcdfont[];
// Draw a circle outline
void ILI9341_t3::drawCircle(int16_t x0, int16_t y0, int16_t r,
uint16_t color) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
drawPixel(x0 , y0+r, color);
drawPixel(x0 , y0-r, color);
drawPixel(x0+r, y0 , color);
drawPixel(x0-r, y0 , color);
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
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);
}
}
void ILI9341_t3::drawCircleHelper( int16_t x0, int16_t y0,
int16_t r, uint8_t cornername, uint16_t color) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x4) {
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 + y, y0 + x, color);
}
if (cornername & 0x2) {
drawPixel(x0 + x, y0 - y, color);
drawPixel(x0 + y, y0 - x, color);
}
if (cornername & 0x8) {
drawPixel(x0 - y, y0 + x, color);
drawPixel(x0 - x, y0 + y, color);
}
if (cornername & 0x1) {
drawPixel(x0 - y, y0 - x, color);
drawPixel(x0 - x, y0 - y, color);
}
}
}
void ILI9341_t3::fillCircle(int16_t x0, int16_t y0, int16_t r,
uint16_t color) {
drawFastVLine(x0, y0-r, 2*r+1, color);
fillCircleHelper(x0, y0, r, 3, 0, color);
}
// Used to do circles and roundrects
void ILI9341_t3::fillCircleHelper(int16_t x0, int16_t y0, int16_t r,
uint8_t cornername, int16_t delta, uint16_t color) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x1) {
drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
}
if (cornername & 0x2) {
drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
}
}
}
// Bresenham's algorithm - thx wikpedia
void ILI9341_t3::drawLine(int16_t x0, int16_t y0,
int16_t x1, int16_t y1, uint16_t color)
{
if (y0 == y1) {
if (x1 > x0) {
drawFastHLine(x0, y0, x1 - x0 + 1, color);
} else if (x1 < x0) {
drawFastHLine(x1, y0, x0 - x1 + 1, color);
} else {
drawPixel(x0, y0, color);
}
return;
} else if (x0 == x1) {
if (y1 > y0) {
drawFastVLine(x0, y0, y1 - y0 + 1, color);
} else {
drawFastVLine(x0, y1, y0 - y1 + 1, color);
}
return;
}
bool steep = abs(y1 - y0) > abs(x1 - x0);
if (steep) {
swap(x0, y0);
swap(x1, y1);
}
if (x0 > x1) {
swap(x0, x1);
swap(y0, y1);
}
int16_t dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int16_t err = dx / 2;
int16_t ystep;
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
int16_t xbegin = x0;
if (steep) {
for (; x0<=x1; x0++) {
err -= dy;
if (err < 0) {
int16_t len = x0 - xbegin;
if (len) {
VLine(y0, xbegin, len + 1, color);
} else {
Pixel(y0, x0, color);
}
xbegin = x0 + 1;
y0 += ystep;
err += dx;
}
}
if (x0 > xbegin + 1) {
VLine(y0, xbegin, x0 - xbegin, color);
}
} else {
for (; x0<=x1; x0++) {
err -= dy;
if (err < 0) {
int16_t len = x0 - xbegin;
if (len) {
HLine(xbegin, y0, len + 1, color);
} else {
Pixel(x0, y0, color);
}
xbegin = x0 + 1;
y0 += ystep;
err += dx;
}
}
if (x0 > xbegin + 1) {
HLine(xbegin, y0, x0 - xbegin, color);
}
}
writecommand_last(ILI9341_NOP);
SPI.endTransaction();
}
// Draw a rectangle
void ILI9341_t3::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
{
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
HLine(x, y, w, color);
HLine(x, y+h-1, w, color);
VLine(x, y, h, color);
VLine(x+w-1, y, h, color);
writecommand_last(ILI9341_NOP);
SPI.endTransaction();
}
// Draw a rounded rectangle
void ILI9341_t3::drawRoundRect(int16_t x, int16_t y, int16_t w,
int16_t h, int16_t r, uint16_t color) {
// smarter version
drawFastHLine(x+r , y , w-2*r, color); // Top
drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
drawFastVLine(x , y+r , h-2*r, color); // Left
drawFastVLine(x+w-1, y+r , h-2*r, color); // Right
// draw four corners
drawCircleHelper(x+r , y+r , r, 1, color);
drawCircleHelper(x+w-r-1, y+r , r, 2, color);
drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
drawCircleHelper(x+r , y+h-r-1, r, 8, color);
}
// Fill a rounded rectangle
void ILI9341_t3::fillRoundRect(int16_t x, int16_t y, int16_t w,
int16_t h, int16_t r, uint16_t color) {
// smarter version
fillRect(x+r, y, w-2*r, h, color);
// draw four corners
fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
}
// Draw a triangle
void ILI9341_t3::drawTriangle(int16_t x0, int16_t y0,
int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color) {
drawLine(x0, y0, x1, y1, color);
drawLine(x1, y1, x2, y2, color);
drawLine(x2, y2, x0, y0, color);
}
// Fill a triangle
void ILI9341_t3::fillTriangle ( int16_t x0, int16_t y0,
int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color) {
int16_t a, b, y, last;
// Sort coordinates by Y order (y2 >= y1 >= y0)
if (y0 > y1) {
swap(y0, y1); swap(x0, x1);
}
if (y1 > y2) {
swap(y2, y1); swap(x2, x1);
}
if (y0 > y1) {
swap(y0, y1); swap(x0, x1);
}
if(y0 == y2) { // Handle awkward all-on-same-line case as its own thing
a = b = x0;
if(x1 < a) a = x1;
else if(x1 > b) b = x1;
if(x2 < a) a = x2;
else if(x2 > b) b = x2;
drawFastHLine(a, y0, b-a+1, color);
return;
}
int16_t
dx01 = x1 - x0,
dy01 = y1 - y0,
dx02 = x2 - x0,
dy02 = y2 - y0,
dx12 = x2 - x1,
dy12 = y2 - y1,
sa = 0,
sb = 0;
// For upper part of triangle, find scanline crossings for segments
// 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
// is included here (and second loop will be skipped, avoiding a /0
// error there), otherwise scanline y1 is skipped here and handled
// in the second loop...which also avoids a /0 error here if y0=y1
// (flat-topped triangle).
if(y1 == y2) last = y1; // Include y1 scanline
else last = y1-1; // Skip it
for(y=y0; y<=last; y++) {
a = x0 + sa / dy01;
b = x0 + sb / dy02;
sa += dx01;
sb += dx02;
/* longhand:
a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if(a > b) swap(a,b);
drawFastHLine(a, y, b-a+1, color);
}
// For lower part of triangle, find scanline crossings for segments
// 0-2 and 1-2. This loop is skipped if y1=y2.
sa = dx12 * (y - y1);
sb = dx02 * (y - y0);
for(; y<=y2; y++) {
a = x1 + sa / dy12;
b = x0 + sb / dy02;
sa += dx12;
sb += dx02;
/* longhand:
a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if(a > b) swap(a,b);
drawFastHLine(a, y, b-a+1, color);
}
}
void ILI9341_t3::drawBitmap(int16_t x, int16_t y,
const uint8_t *bitmap, int16_t w, int16_t h,
uint16_t color) {
int16_t i, j, byteWidth = (w + 7) / 8;
for(j=0; j<h; j++) {
for(i=0; i<w; i++ ) {
if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & (128 >> (i & 7))) {
drawPixel(x+i, y+j, color);
}
}
}
}
size_t ILI9341_t3::write(uint8_t c)
{
if (font) {
if (c == '\n') {
//cursor_y += ??
cursor_x = 0;
} else {
drawFontChar(c);
}
} else {
if (c == '\n') {
cursor_y += textsize*8;
cursor_x = 0;
} else if (c == '\r') {
// skip em
} else {
drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
cursor_x += textsize*6;
if (wrap && (cursor_x > (_width - textsize*6))) {
cursor_y += textsize*8;
cursor_x = 0;
}
}
}
return 1;
}
// Draw a character
void ILI9341_t3::drawChar(int16_t x, int16_t y, unsigned char c,
uint16_t fgcolor, uint16_t bgcolor, uint8_t size)
{
if((x >= _width) || // Clip right
(y >= _height) || // Clip bottom
((x + 6 * size - 1) < 0) || // Clip left TODO: is this correct?
((y + 8 * size - 1) < 0)) // Clip top TODO: is this correct?
return;
if (fgcolor == bgcolor) {
// This transparent approach is only about 20% faster
if (size == 1) {
uint8_t mask = 0x01;
int16_t xoff, yoff;
for (yoff=0; yoff < 8; yoff++) {
uint8_t line = 0;
for (xoff=0; xoff < 5; xoff++) {
if (glcdfont[c * 5 + xoff] & mask) line |= 1;
line <<= 1;
}
line >>= 1;
xoff = 0;
while (line) {
if (line == 0x1F) {
drawFastHLine(x + xoff, y + yoff, 5, fgcolor);
break;
} else if (line == 0x1E) {
drawFastHLine(x + xoff, y + yoff, 4, fgcolor);
break;
} else if ((line & 0x1C) == 0x1C) {
drawFastHLine(x + xoff, y + yoff, 3, fgcolor);
line <<= 4;
xoff += 4;
} else if ((line & 0x18) == 0x18) {
drawFastHLine(x + xoff, y + yoff, 2, fgcolor);
line <<= 3;
xoff += 3;
} else if ((line & 0x10) == 0x10) {
drawPixel(x + xoff, y + yoff, fgcolor);
line <<= 2;
xoff += 2;
} else {
line <<= 1;
xoff += 1;
}
}
mask = mask << 1;
}
} else {
uint8_t mask = 0x01;
int16_t xoff, yoff;
for (yoff=0; yoff < 8; yoff++) {
uint8_t line = 0;
for (xoff=0; xoff < 5; xoff++) {
if (glcdfont[c * 5 + xoff] & mask) line |= 1;
line <<= 1;
}
line >>= 1;
xoff = 0;
while (line) {
if (line == 0x1F) {
fillRect(x + xoff * size, y + yoff * size,
5 * size, size, fgcolor);
break;
} else if (line == 0x1E) {
fillRect(x + xoff * size, y + yoff * size,
4 * size, size, fgcolor);
break;
} else if ((line & 0x1C) == 0x1C) {
fillRect(x + xoff * size, y + yoff * size,
3 * size, size, fgcolor);
line <<= 4;
xoff += 4;
} else if ((line & 0x18) == 0x18) {
fillRect(x + xoff * size, y + yoff * size,
2 * size, size, fgcolor);
line <<= 3;
xoff += 3;
} else if ((line & 0x10) == 0x10) {
fillRect(x + xoff * size, y + yoff * size,
size, size, fgcolor);
line <<= 2;
xoff += 2;
} else {
line <<= 1;
xoff += 1;
}
}
mask = mask << 1;
}
}
} else {
// This solid background approach is about 5 time faster
SPI.beginTransaction(SPISettings(SPICLOCK, MSBFIRST, SPI_MODE0));
setAddr(x, y, x + 6 * size - 1, y + 8 * size - 1);
writecommand_cont(ILI9341_RAMWR);
uint8_t xr, yr;
uint8_t mask = 0x01;
uint16_t color;
for (y=0; y < 8; y++) {
for (yr=0; yr < size; yr++) {
for (x=0; x < 5; x++) {
if (glcdfont[c * 5 + x] & mask) {
color = fgcolor;
} else {
color = bgcolor;
}
for (xr=0; xr < size; xr++) {
writedata16_cont(color);
}
}
for (xr=0; xr < size; xr++) {
writedata16_cont(bgcolor);
}
}
mask = mask << 1;
}
writecommand_last(ILI9341_NOP);
SPI.endTransaction();
}
}
static uint32_t fetchbit(const uint8_t *p, uint32_t index)
{
if (p[index >> 3] & (1 << (7 - (index & 7)))) return 1;
return 0;
}
static uint32_t fetchbits_unsigned(const uint8_t *p, uint32_t index, uint32_t required)
{
uint32_t val = 0;
do {
uint8_t b = p[index >> 3];
uint32_t avail = 8 - (index & 7);
if (avail <= required) {