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GD23ZU.cpp
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GD23ZU.cpp
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/*
* FT81X FTDI screens Library for Teensy 3.5/6 and STM32F1x, F4 and F7
* based on STM32_GD2 by nopnop2002
* https://github.com/nopnop2002/STM32_GD2
*
* FT800/81X TFT Library for STM32F103
* based on GD23STM32_F103x by lightcalamar
* https://github.com/lightcalamar/GD23STM32_F103x
*
* GD23STM32_F103x has been developed based on Gameduino 2 library.
* Copyright (C) 2013-2016 by James Bowman <[email protected]>
* Gameduino 2 library for Arduino, Arduino Due, Raspberry Pi.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* GD23ZU Library for STM32Fx and Teensy 3.5/6
*
* MexSpa Team contribution for https://ft81xmania.com
* June 7, 2018
*/
#include <Arduino.h>
//#include <EEPROM.h>
#include <SPI.h>
#include <SdFat.h> // https://github.com/greiman/SdFat
#include <GD23ZU.h>
#include "transports/wiring.h"
#if defined(ARDUINO_ARCH_STM32)
#if(STM32_CPU == 429)
SdFat SD(3); // STM32F429 with PA15
#endif
#if(STM32_CPU == 767)
SdFat SD(3); // STM32F767 with PB11
#endif
#if(STM32_CPU == 407)
SdFat SD(2); // M4DEMO with PB12
// SdFatSdio SD;
#endif
#endif
#if defined(TEENSYDUINO)
SdFatSdioEX SD; // Teensy 3.6-3.5
#endif
byte ft8xx_model; // 0:FT800 / 1:FT81x
uint16_t FT800_model; // 0x00:FT800/0x10:FT810/0x11:FT811/0x12:FT812/0x13:FT813
void xy::set(int _x, int _y)
{
x = _x;
y = _y;
}
void xy::rmove(int distance, int angle)
{
x -= GD.rsin(distance, angle);
y += GD.rcos(distance, angle);
}
int xy::angleto(class xy &other)
{
int dx = other.x - x, dy = other.y - y;
return GD.atan2(dy, dx);
}
void xy::draw(byte offset)
{
GD.Vertex2f(x - PIXELS(offset), y - PIXELS(offset));
}
int xy::onscreen(void)
{
return (0 <= x) &&
(x < PIXELS(GD.w)) &&
(0 <= y) &&
(y < PIXELS(GD.h));
}
class xy xy::operator+=(class xy &other)
{
x += other.x;
y += other.y;
return *this;
}
class xy xy::operator-=(class xy &other)
{
x -= other.x;
y -= other.y;
return *this;
}
class xy xy::operator<<=(int d)
{
x <<= d;
y <<= d;
return *this;
}
long xy::operator*(class xy &other)
{
return (long(x) * other.x) + (long(y) * other.y);
}
class xy xy::operator*=(int s)
{
x *= s;
y *= s;
return *this;
}
int xy::nearer_than(int distance, xy &other)
{
int lx = abs(x - other.x);
if (lx > distance)
return 0;
int ly = abs(y - other.y);
if (ly > distance)
return 0;
// trivial accept: 5/8 is smaller than 1/sqrt(2)
int d2 = (5 * distance) >> 3;
if ((lx < d2) && (ly < d2))
return 1;
return ((lx * lx) + (ly * ly)) < (distance * distance);
}
////////////////////////////////////////////////////////////////////////
void xy::rotate(int angle)
{
// the hardware's convention that rotation is clockwise
int32_t s = GD.rsin(32767, angle);
int32_t c = GD.rcos(32767, angle);
int xr = ((x * c) - (y * s)) >> 15;
int yr = ((x * s) + (y * c)) >> 15;
x = xr;
y = yr;
}
void Bitmap::fromtext(int font, const char* s)
{
GD.textsize(size.x, size.y, font, s);
int pclk = GD.rd16(REG_PCLK);
int vsize = GD.rd16(REG_VSIZE);
int hsize = GD.rd16(REG_HSIZE);
GD.finish();
GD.wr(REG_PCLK, 0);
delay(1);
GD.wr16(REG_HSIZE, size.x);
GD.wr16(REG_VSIZE, size.y);
GD.cmd_dlstart();
GD.Clear();
GD.BlendFunc(1,1);
GD.cmd_text(0, 0, font, 0, s);
GD.swap();
GD.loadptr = (GD.loadptr + 1) & ~1;
GD.cmd_snapshot(GD.loadptr);
GD.finish();
GD.wr16(REG_HSIZE, hsize);
GD.wr16(REG_VSIZE, vsize);
GD.wr16(REG_PCLK, pclk);
defaults(ARGB4);
}
void Bitmap::fromfile(const char* filename, int format)
{
GD.loadptr = (GD.loadptr + 1) & ~1;
GD.cmd_loadimage(GD.loadptr, OPT_NODL);
GD.load(filename);
uint32_t ptr, w, h;
GD.cmd_getprops(ptr, w, h);
GD.finish();
size.x = GD.rd16(w);
size.y = GD.rd16(h);
defaults(format);
}
static const PROGMEM uint8_t bpltab[] = {
/* 0 ARGB1555 */ 0,
/* 1 L1 */ 4,
/* 2 L4 */ 2,
/* 3 L8 */ 1,
/* 4 RGB332 */ 1,
/* 5 ARGB2 */ 1,
/* 6 ARGB4 */ 0,
/* 7 RGB565 */ 0,
/* 8 PALETTED */ 1,
/* 9 TEXT8X8 */ 0,
/* 10 TEXTVGA */ 0,
/* 11 BARGRAPH */ 1,
/* 12 */ 0,
/* 13 */ 0,
/* 14 */ 0,
/* 15 */ 0,
/* 16 */ 0,
/* 17 L2 */ 3
};
void Bitmap::defaults(uint8_t f)
{
source = GD.loadptr;
format = f;
handle = -1;
center.x = size.x / 2;
center.y = size.y / 2;
GD.loadptr += (long)((size.x << 1) >> pgm_read_byte_near(bpltab + f)) * size.y;
}
void Bitmap::setup(void)
{
GD.BitmapSource(source);
int bpl = (size.x << 1) >> pgm_read_byte_near(bpltab + format);
GD.BitmapLayout(format, bpl, size.y);
GD.BitmapSize(NEAREST, BORDER, BORDER, size.x, size.y);
}
void Bitmap::bind(uint8_t h)
{
handle = h;
GD.BitmapHandle(handle);
setup();
}
#define IS_POWER_2(x) (((x) & ((x) - 1)) == 0)
void Bitmap::wallpaper()
{
if (handle == -1) {
GD.BitmapHandle(15);
setup();
} else {
GD.BitmapHandle(handle);
}
GD.Begin(BITMAPS);
// if power-of-2, can just use REPEAT,REPEAT
// otherwise must draw it across whole screen
if (IS_POWER_2(size.x) && IS_POWER_2(size.y)) {
GD.BitmapSize(NEAREST, REPEAT, REPEAT, GD.w, GD.h);
GD.Vertex2f(0, 0);
} else {
for (int x = 0; x < GD.w; x += size.x)
for (int y = 0; y < GD.h; y += size.y)
GD.Vertex2f(x << 4, y << 4);
}
}
void Bitmap::draw(int x, int y, int16_t angle)
{
xy pos;
pos.set(x, y);
pos <<= 4;
draw(pos, angle);
}
void Bitmap::draw(const xy &p, int16_t angle)
{
xy pos = p;
if (handle == -1) {
GD.BitmapHandle(15);
setup();
} else {
GD.BitmapHandle(handle);
}
GD.Begin(BITMAPS);
if (angle == 0) {
xy c4 = center;
c4 <<= 4;
pos -= c4;
GD.BitmapSize(NEAREST, BORDER, BORDER, size.x, size.y);
GD.Vertex2f(pos.x, pos.y);
} else {
// Compute the screen positions of 4 corners of the bitmap
xy corners[4] = {
{0,0 },
{size.x, 0 },
{0, size.y },
{size.x, size.y },
};
for (int i = 0; i < 4; i++) {
xy &c = corners[i];
c -= center;
c <<= 4;
c.rotate(angle);
c += pos;
}
// Find top-left and bottom-right boundaries
xy topleft, bottomright;
topleft.set(
min(min(corners[0].x, corners[1].x), min(corners[2].x, corners[3].x)),
min(min(corners[0].y, corners[1].y), min(corners[2].y, corners[3].y)));
bottomright.set(
max(max(corners[0].x, corners[1].x), max(corners[2].x, corners[3].x)),
max(max(corners[0].y, corners[1].y), max(corners[2].y, corners[3].y)));
// span is the total size of this region
xy span = bottomright;
span -= topleft;
GD.BitmapSize(BILINEAR, BORDER, BORDER,
(span.x + 15) >> 4, (span.y + 15) >> 4);
// Set up the transform and draw the bitmap
pos -= topleft;
GD.SaveContext();
GD.cmd_loadidentity();
GD.cmd_translate((int32_t)pos.x << 12, (int32_t)pos.y << 12);
GD.cmd_rotate(angle);
GD.cmd_translate(F16(-center.x), F16(-center.y));
GD.cmd_setmatrix();
GD.Vertex2f(topleft.x, topleft.y);
GD.RestoreContext();
}
}
class Bitmap __fromatlas(uint32_t a)
{
Bitmap r;
r.size.x = GD.rd16(a);
r.size.y = GD.rd16(a + 2);
r.center.x = GD.rd16(a + 4);
r.center.y = GD.rd16(a + 6);
r.source = GD.rd32(a + 8);
r.format = GD.rd(a + 12);
r.handle = -1;
return r;
}
////////////////////////////////////////////////////////////////////////
static GDTransport GDTR;
GDClass GD;
////////////////////////////////////////////////////////////////////////
// The GD3 has a tiny configuration EEPROM - AT24C01D
// It is programmed at manufacturing time with the setup
// commands for the connected panel. The SCL,SDA lines
// are connected to thye FT81x GPIO0, GPIO1 signals.
// This is a read-only driver for it. A single method
// 'read()' initializes the RAM and reads all 128 bytes
// into an array.
class ConfigRam {
private:
uint8_t gpio, gpio_dir, sda;
void set_SDA(byte n)
{
if (sda != n) {
GDTR.__wr16(REG_GPIO_DIR, gpio_dir | (0x03 - n)); // Drive SCL, SDA low
sda = n;
}
}
void set_SCL(byte n)
{
GDTR.__wr16(REG_GPIO, gpio | (n << 1));
}
int get_SDA(void)
{
return GDTR.__rd16(REG_GPIO) & 1;
}
void i2c_start(void)
{
set_SDA(1);
set_SCL(1);
set_SDA(0);
set_SCL(0);
}
void i2c_stop(void)
{
set_SDA(0);
set_SCL(1);
set_SDA(1);
set_SCL(1);
}
int i2c_rx1()
{
set_SDA(1);
set_SCL(1);
byte r = get_SDA();
set_SCL(0);
return r;
}
void i2c_tx1(byte b)
{
set_SDA(b);
set_SCL(1);
set_SCL(0);
}
int i2c_tx(byte x)
{
for (byte i = 0; i < 8; i++, x <<= 1)
i2c_tx1(x >> 7);
return i2c_rx1();
}
int i2c_rx(int nak)
{
byte r = 0;
for (byte i = 0; i < 8; i++)
r = (r << 1) | i2c_rx1();
i2c_tx1(nak);
return r;
}
public:
void read(byte *v)
{
GDTR.__end();
gpio = GDTR.__rd16(REG_GPIO) & ~3;
gpio_dir = GDTR.__rd16(REG_GPIO_DIR) & ~3;
sda = 2;
// 2-wire software reset
i2c_start();
i2c_rx(1);
i2c_start();
i2c_stop();
int ADDR = 0xa0;
i2c_start();
if (i2c_tx(ADDR))
return;
if (i2c_tx(0))
return;
i2c_start();
if (i2c_tx(ADDR | 1))
return;
for (int i = 0; i < 128; i++) {
*v++ = i2c_rx(i == 127);
// Serial.println(v[-1], DEC);
}
i2c_stop();
GDTR.resume();
}
};
//RndMnkIII
const uint16_t GDClass::TAM_BUFFER_SD=8192;
const uint16_t GDClass::TAM_BUFFER_FT=2048;
byte GDClass::buf[TAM_BUFFER_SD];
byte GDClass::FTbuf[TAM_BUFFER_FT];
void GDClass::flush(void)
{
GDTR.flush();
}
void GDClass::swap(void) {
Display();
cmd_swap();
cmd_loadidentity();
cmd_dlstart();
GDTR.flush();
#ifdef DUMPDEV
GDTR.swap();
#endif
}
uint32_t GDClass::measure_freq(void)
{
unsigned long t0 = GDTR.rd32(REG_CLOCK);
delayMicroseconds(15625);
unsigned long t1 = GDTR.rd32(REG_CLOCK);
// Serial.println((t1 - t0) << 6);
return (t1 - t0) << 6;
}
#if 0
#if (TFT_FT81X_ENABLE == 0)
#define LOW_FREQ_BOUND 47040000UL
#endif
#if (TFT_FT81X_ENABLE == 1)
#define LOW_FREQ_BOUND 58800000UL
#endif
// #define LOW_FREQ_BOUND 32040000UL
#endif
void GDClass::tune(void)
{
uint32_t LOW_FREQ_BOUND = 32040000;
if (FT800_model == 0)
LOW_FREQ_BOUND = 47040000;
uint32_t f;
for (byte i = 0; (i < 31) && ((f = measure_freq()) < LOW_FREQ_BOUND); i++) {
GDTR.wr(REG_TRIM, i);
}
GDTR.wr32(REG_FREQUENCY, f);
}
void GDClass::begin(uint8_t options) {
GDTR.begin0();
if (options & GD_STORAGE)
{
// pinMode(SD_PIN, OUTPUT);
// digitalWrite(SD_PIN, HIGH);
// SD.begin(SD_PIN);
#if defined(ARDUINO_ARCH_STM32)
SD.begin(SD_PIN, SD_SCK_MHZ(36)); // STM32
#endif
#if defined(TEENSYDUINO)
SD.begin(); // Teensy 3.6-3.5
#endif
}
FT800_model = GDTR.begin1();
GDTR.wr(REG_PWM_DUTY, 0);
GDTR.wr(REG_GPIO_DIR, 0x83);
GDTR.wr(REG_GPIO, GDTR.rd(REG_GPIO) | 0x80);
ConfigRam cr;
byte v8[128] = {0};
cr.read(v8);
#if 0
if ((v8[1] == 0xff) && (v8[2] == 0x01)) {
options &= ~(GD_TRIM | GD_CALIBRATE);
if (v8[3] & 2) {
GDTR.__end();
GDTR.hostcmd(0x44); // switch to external crystal
GDTR.resume();
}
copyram(v8 + 4, 124);
finish();
} else {
#endif
// ******************************************************************************************
if (FT800_model == 00) // FT800 Series
{
GDTR.wr(REG_PCLK_POL, 1);
GDTR.wr(REG_PCLK, 5);
// Avoid inverted colours on alternative-FT800 boards
#if PROTO == 1
GDTR.wr(REG_SWIZZLE, 3);
#endif
GDTR.wr(REG_ROTATE, ROTACION);
}
// ******************************************************************************************
if(FT800_model == 0x10) // FT810
{
GD.wr32(REG_HCYCLE, 900);//548
GD.wr32(REG_HOFFSET, 43);
GD.wr32(REG_HSIZE, 800);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 41);
GD.wr32(REG_VCYCLE, 500);
GD.wr32(REG_VOFFSET, 12);
GD.wr32(REG_VSIZE, 480);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 10);
GD.wr32(REG_DITHER, 1);
GD.wr32(REG_PCLK_POL, 1);//1
GD.wr32(REG_PCLK, 3);//5
GD.wr(REG_ROTATE, 0);
GD.wr(REG_SWIZZLE, 0);//3 for GD2
}
//******************************************************************************************
if(FT800_model == 0x11) // FT811
{
GD.wr32(REG_HCYCLE, 1000);//548
GD.wr32(REG_HOFFSET, 43);
GD.wr32(REG_HSIZE, 800);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 41);
GD.wr32(REG_VCYCLE, 500);
GD.wr32(REG_VOFFSET, 12);
GD.wr32(REG_VSIZE, 480);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 10);
GD.wr32(REG_DITHER, 1);
GD.wr32(REG_PCLK_POL, 1);//1
GD.wr32(REG_PCLK, 3);//5
GD.wr(REG_ROTATE, 0);
GD.wr(REG_SWIZZLE, 0);//3 for gameduino 2
}
// ******************************************************************************************
if(FT800_model == 0x13) // FT813
{
// GD.wr32(REG_HSIZE, 800);
// GD.wr32(REG_VSIZE, 480);
// GD.wr32(REG_HCYCLE, 1056);//1000
// GD.wr32(REG_HOFFSET, 46);
// GD.wr32(REG_HSYNC0, 0);
// GD.wr32(REG_HSYNC1, 10); //41
// GD.wr32(REG_VCYCLE, 525);
// GD.wr32(REG_VOFFSET, 23);
// GD.wr32(REG_VSYNC0, 0);
// GD.wr32(REG_VSYNC1, 10);
// GD.wr32(REG_PCLK, 2);//5
// GD.wr32(REG_SWIZZLE, 0);//3 for GD2
// GD.wr32(REG_PCLK_POL, 1);//1
// GD.wr32(REG_CSPREAD, 0);
// GD.wr32(REG_DITHER, 0);
if (SizeFT813==7)
{
GD.wr32(REG_HCYCLE, 1056);//1000
GD.wr32(REG_HOFFSET, 88);
GD.wr32(REG_HSIZE, 800);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 48); //41
GD.wr32(REG_VSIZE, 480);
GD.wr32(REG_VCYCLE, 525);
GD.wr32(REG_VOFFSET, 32);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 3);
//GD.wr32(REG_SWIZZLE, 0);//3 for GD2
GD.wr32(REG_PCLK, 2);//5
GD.wr32(REG_PCLK_POL, 1);//1
GD.wr32(REG_CSPREAD, 1);
GD.wr32(REG_DITHER, 1);
}
if (SizeFT813==5)
{
GD.wr32(REG_HCYCLE, 1056); // 900 //548
GD.wr32(REG_HOFFSET, 88); // 46
GD.wr32(REG_HSIZE, 800);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 10); // 41
GD.wr32(REG_VCYCLE, 525); // 500
GD.wr32(REG_VOFFSET, 32); // 23
GD.wr32(REG_VSIZE, 480);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 10);
GD.wr32(REG_PCLK, 2);
GD.wr32(REG_PCLK_POL, 0);
GD.wr32(REG_CSPREAD, 0); // 1
GD.wr32(REG_DITHER, 1); // 1
}
if (SizeFT813==43)
{
GD.wr32(REG_HSIZE, 480);
GD.wr32(REG_HCYCLE, 548);
GD.wr32(REG_HOFFSET, 43);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 41);
GD.wr32(REG_VSIZE, 272);
GD.wr32(REG_VCYCLE, 292);
GD.wr32(REG_VOFFSET, 12);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 10);
GD.wr32(REG_PCLK, 5);//5
GD.wr32(REG_SWIZZLE, 0);//3 for GD2
GD.wr32(REG_PCLK_POL, 1);//1
GD.wr32(REG_CSPREAD, 1);//1
GD.wr32(REG_DITHER, 1);
//GD.wr(REG_ROTATE, 0);
}
if (SizeFT813==35)
{
GD.wr32(REG_HSIZE, 320);
GD.wr32(REG_HCYCLE, 408);
GD.wr32(REG_HOFFSET, 70);
GD.wr32(REG_HSYNC0, 0);
GD.wr32(REG_HSYNC1, 10);
GD.wr32(REG_VSIZE, 240);
GD.wr32(REG_VCYCLE, 263);
GD.wr32(REG_VOFFSET, 13);
GD.wr32(REG_VSYNC0, 0);
GD.wr32(REG_VSYNC1, 2);
GD.wr32(REG_PCLK, 6);//5
GD.wr32(REG_SWIZZLE, 2);//3 for GD2
GD.wr32(REG_PCLK_POL, 1);//1
GD.wr32(REG_CSPREAD, 0);//1
GD.wr32(REG_DITHER, 1);
//GD.wr(REG_ROTATE, 0);
}
}
w = GDTR.rd16(REG_HSIZE);
h = GDTR.rd16(REG_VSIZE);
model = 800;
if (FT800_model != 0) model = 800 + (FT800_model - 6);
//loadptr = 0;
// Work-around issue with bitmap sizes not being reset
for (byte i = 0; i < 32; i++) {
BitmapHandle(i);
cI(0x28000000UL);
cI(0x29000000UL);
}
Clear(); swap();
Clear(); swap();
Clear(); swap();
if (FT800_model == 0x13)
{
cmd_regwrite(REG_PWM_DUTY, 100);
}else{
cmd_regwrite(REG_PWM_DUTY, 128);
}
// FT81XMANIA TEAM (TFTLCDCyg)
if (FT800_model != 0)
{
cmd_setrotate(ORIENTACION);
}
if (FT800_model == 0)
{
GDTR.wr(REG_ROTATE, ROTACION);
}
// FT81XMANIA TEAM (TFTLCDCyg)
GD.flush();
int calibrate = 0;
if (options & GD_CALIBRATE) calibrate = 1;
if (options & FORCE_CALIBRATE) calibrate = 2;
// if (CALIBRATION & (options & GD_CALIBRATE)){
// if (CALIBRATION & (calibrate != 0)) {
if (calibrate != 0) {
//uint16 Status;
uint16_t Data;
//Status = EEPROM.read(0x10,&Data);
if (Data != 0x7c || calibrate == 2) {
self_calibrate();
//EEPROM.format();
for (int i = 0; i < 24; i++) {
Data = GDTR.rd(REG_TOUCH_TRANSFORM_A + i);
//Status = EEPROM.write(0x20 + i, Data);
}
//Status = EEPROM.write(0x10, 0x7c); // is written!
} else {
for (int i = 0; i < 24; i++) {
//Status=EEPROM.read(0x20+i,&Data);
GDTR.wr(REG_TOUCH_TRANSFORM_A + i, Data);
}
}
}
GDTR.wr16(REG_TOUCH_RZTHRESH, 1200);
rseed = 0x77777777;
if (options & GD_TRIM) {
tune();
}
}
void GDClass::storage(void) {
GDTR.__end();
//SD.begin(SD_PIN);
#if defined(ARDUINO_ARCH_STM32)
SD.begin(SD_PIN, SD_SCK_MHZ(36)); // STM32
#endif
#if defined(TEENSYDUINO)
SD.begin(); // Teensy 3.6-3.5
#endif
GDTR.resume();
}
void GDClass::self_calibrate(void) {
cmd_dlstart();
Clear();
cmd_text(240, 100, 30, OPT_CENTERX, "please tap on the dot");
cmd_calibrate();
finish();
cmd_loadidentity();
cmd_dlstart();
GDTR.flush();
}
void GDClass::seed(uint16_t n) {
rseed = n ? n : 7;
}
uint16_t GDClass::random() {
rseed ^= rseed << 2;
rseed ^= rseed >> 5;
rseed ^= rseed << 1;
return rseed;
}
uint16_t GDClass::random(uint16_t n) {
uint16_t p = random();
if (n == (n & -n))
return p & (n - 1);
return (uint32_t(p) * n) >> 16;
}
// >>> [int(65535*math.sin(math.pi * 2 * i / 1024)) for i in range(257)]
static const PROGMEM uint16_t sintab[257] = {
0, 402, 804, 1206, 1608, 2010, 2412, 2813, 3215, 3617, 4018, 4419, 4821, 5221, 5622, 6023, 6423, 6823, 7223, 7622, 8022, 8421, 8819, 9218, 9615, 10013, 10410, 10807, 11203, 11599, 11995, 12390, 12785, 13179, 13573, 13966, 14358, 14750, 15142, 15533, 15923, 16313, 16702, 17091, 17479, 17866, 18252, 18638, 19023, 19408, 19791, 20174, 20557, 20938, 21319, 21699, 22078, 22456, 22833, 23210, 23585, 23960, 24334, 24707, 25079, 25450, 25820, 26189, 26557, 26924, 27290, 27655, 28019, 28382, 28744, 29105, 29465, 29823, 30181, 30537, 30892, 31247, 31599, 31951, 32302, 32651, 32999, 33346, 33691, 34035, 34378, 34720, 35061, 35400, 35737, 36074, 36409, 36742, 37075, 37406, 37735, 38063, 38390, 38715, 39039, 39361, 39682, 40001, 40319, 40635, 40950, 41263, 41574, 41885, 42193, 42500, 42805, 43109, 43411, 43711, 44010, 44307, 44603, 44896, 45189, 45479, 45768, 46055, 46340, 46623, 46905, 47185, 47463, 47739, 48014, 48287, 48558, 48827, 49094, 49360, 49623, 49885, 50145, 50403, 50659, 50913, 51165, 51415, 51664, 51910, 52155, 52397, 52638, 52876, 53113, 53347, 53580, 53810, 54039, 54265, 54490, 54712, 54933, 55151, 55367, 55581, 55793, 56003, 56211, 56416, 56620, 56821, 57021, 57218, 57413, 57606, 57796, 57985, 58171, 58355, 58537, 58717, 58894, 59069, 59242, 59413, 59582, 59748, 59912, 60074, 60234, 60391, 60546, 60699, 60849, 60997, 61143, 61287, 61428, 61567, 61704, 61838, 61970, 62100, 62227, 62352, 62474, 62595, 62713, 62828, 62941, 63052, 63161, 63267, 63370, 63472, 63570, 63667, 63761, 63853, 63942, 64029, 64114, 64196, 64275, 64353, 64427, 64500, 64570, 64637, 64702, 64765, 64825, 64883, 64938, 64991, 65042, 65090, 65135, 65178, 65219, 65257, 65293, 65326, 65357, 65385, 65411, 65435, 65456, 65474, 65490, 65504, 65515, 65523, 65530, 65533, 65535
};
int16_t GDClass::rsin(int16_t r, uint16_t th) {
th >>= 6; // angle 0-1023
// return int(r * sin((2 * M_PI) * th / 1024.));
int th4 = th & 511;
if (th4 & 256)
th4 = 512 - th4; // 256->256 257->255, etc
uint16_t s = pgm_read_word_near(sintab + th4);
int16_t p = ((uint32_t)s * r) >> 16;
if (th & 512)
p = -p;
return p;
}
int16_t GDClass::rcos(int16_t r, uint16_t th) {
return rsin(r, th + 0x4000);
}
void GDClass::polar(int &x, int &y, int16_t r, uint16_t th) {
x = (int)(-GD.rsin(r, th));
y = (int)( GD.rcos(r, th));
}
// >>> [int(round(1024 * math.atan(i / 256.) / math.pi)) for i in range(256)]
static const PROGMEM uint8_t atan8[] = {
0,1,3,4,5,6,8,9,10,11,13,14,15,17,18,19,20,22,23,24,25,27,28,29,30,32,33,34,36,37,38,39,41,42,43,44,46,47,48,49,51,52,53,54,55,57,58,59,60,62,63,64,65,67,68,69,70,71,73,74,75,76,77,79,80,81,82,83,85,86,87,88,89,91,92,93,94,95,96,98,99,100,101,102,103,104,106,107,108,109,110,111,112,114,115,116,117,118,119,120,121,122,124,125,126,127,128,129,130,131,132,133,134,135,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,177,178,179,180,181,182,183,184,185,186,187,188,188,189,190,191,192,193,194,195,195,196,197,198,199,200,201,201,202,203,204,205,206,206,207,208,209,210,211,211,212,213,214,215,215,216,217,218,219,219,220,221,222,222,223,224,225,225,226,227,228,228,229,230,231,231,232,233,234,234,235,236,236,237,238,239,239,240,241,241,242,243,243,244,245,245,246,247,248,248,249,250,250,251,251,252,253,253,254,255,255
};
uint16_t GDClass::atan2(int16_t y, int16_t x)
{
uint16_t a;
uint16_t xx = 0;
/* These values are tricky. So pretend they are not */
if (x == -32768)
x++;
if (y == -32768)
y++;
if ((x <= 0) ^ (y > 0)) {
int16_t t; t = x; x = y; y = t;
xx ^= 0x4000;
}
if (x <= 0) {
x = -x;
} else {
xx ^= 0x8000;
}
y = abs(y);
if (x > y) {
int16_t t; t = x; x = y; y = t;
xx ^= 0x3fff;
}
while ((x | y) & 0xff80) {
x >>= 1;
y >>= 1;
}
if (y == 0) {
a = 0;
} else if (x == y) {
a = 0x2000;
} else {
// assert(x <= y);
int r = ((x << 8) / y);
// assert(0 <= r);
// assert(r < 256);
a = pgm_read_byte(atan8 + r) << 5;
}
a ^= xx;
return a;
}
void GDClass::align(byte n) {
while ((n++) & 3)
GDTR.cmdbyte(0);
}
void GDClass::cH(uint16_t v) {
GDTR.cmdbyte(v & 0xff);
GDTR.cmdbyte((v >> 8) & 0xff);
}
void GDClass::ch(int16_t v) {
cH((uint16_t)v);
}
void GDClass::cI(uint32_t v) {
GDTR.cmd32(v);
}
void GDClass::cFFFFFF(byte v) {
union {
uint32_t c;
uint8_t b[4];
};
b[0] = v;
b[1] = 0xff;
b[2] = 0xff;
b[3] = 0xff;
GDTR.cmd32(c);
}
void GDClass::ci(int32_t v) {
cI((uint32_t) v);
}
void GDClass::cs(const char *s) {
int count = 0;
while (*s) {
char c = *s++;
GDTR.cmdbyte(c);
count++;
}
GDTR.cmdbyte(0);
align(count + 1);
}
void GDClass::copy(const PROGMEM uint8_t *src, int count) {
byte a = count & 3;
while (count--) {
GDTR.cmdbyte(pgm_read_byte_near(src));
src++;
}
align(a);
}
void GDClass::copyram(byte *src, int count) {
byte a = count & 3;
GDTR.cmd_n(src, count);
align(a);
}
void GDClass::AlphaFunc(byte func, byte ref) {
cI((9UL << 24) | ((func & 7L) << 8) | ((ref & 255L) << 0));
}
void GDClass::Begin(byte prim) {
cI((31UL << 24) | prim);