ELEC2645 (2018/19) / Mbed 2 deprecated el17kz

runner

Dependencies:   mbed

N5110/N5110.cpp@2:1900a4144537, 2019-05-09 (annotated)

Committer:
kamtas
Date:
Thu May 09 03:52:35 2019 +0000
Revision:
2:1900a4144537
Parent:
0:1e61ade20a23 
Initial game engine working, includes a basic sprite with an ability to jump

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kamtas 0:1e61ade20a23 1 #include "mbed.h"
kamtas 0:1e61ade20a23 2 #include "N5110.h"
kamtas 0:1e61ade20a23 3
kamtas 0:1e61ade20a23 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
kamtas 0:1e61ade20a23 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
kamtas 0:1e61ade20a23 6 // to power LCD. Doesn't work well with K64F.
kamtas 0:1e61ade20a23 7 N5110::N5110(PinName const pwrPin,
kamtas 0:1e61ade20a23 8 PinName const scePin,
kamtas 0:1e61ade20a23 9 PinName const rstPin,
kamtas 0:1e61ade20a23 10 PinName const dcPin,
kamtas 0:1e61ade20a23 11 PinName const mosiPin,
kamtas 0:1e61ade20a23 12 PinName const sclkPin,
kamtas 0:1e61ade20a23 13 PinName const ledPin)
kamtas 0:1e61ade20a23 14 :
kamtas 0:1e61ade20a23 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
kamtas 0:1e61ade20a23 16 _led(new PwmOut(ledPin)),
kamtas 0:1e61ade20a23 17 _pwr(new DigitalOut(pwrPin)),
kamtas 0:1e61ade20a23 18 _sce(new DigitalOut(scePin)),
kamtas 0:1e61ade20a23 19 _rst(new DigitalOut(rstPin)),
kamtas 0:1e61ade20a23 20 _dc(new DigitalOut(dcPin))
kamtas 0:1e61ade20a23 21 {}
kamtas 0:1e61ade20a23 22
kamtas 0:1e61ade20a23 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
kamtas 0:1e61ade20a23 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
kamtas 0:1e61ade20a23 25 // drive the LCD.
kamtas 0:1e61ade20a23 26 N5110::N5110(PinName const scePin,
kamtas 0:1e61ade20a23 27 PinName const rstPin,
kamtas 0:1e61ade20a23 28 PinName const dcPin,
kamtas 0:1e61ade20a23 29 PinName const mosiPin,
kamtas 0:1e61ade20a23 30 PinName const sclkPin,
kamtas 0:1e61ade20a23 31 PinName const ledPin)
kamtas 0:1e61ade20a23 32 :
kamtas 0:1e61ade20a23 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
kamtas 0:1e61ade20a23 34 _led(new PwmOut(ledPin)),
kamtas 0:1e61ade20a23 35 _pwr(NULL), // pwr not needed so null it to be safe
kamtas 0:1e61ade20a23 36 _sce(new DigitalOut(scePin)),
kamtas 0:1e61ade20a23 37 _rst(new DigitalOut(rstPin)),
kamtas 0:1e61ade20a23 38 _dc(new DigitalOut(dcPin))
kamtas 0:1e61ade20a23 39 {}
kamtas 0:1e61ade20a23 40
kamtas 0:1e61ade20a23 41 N5110::~N5110()
kamtas 0:1e61ade20a23 42 {
kamtas 0:1e61ade20a23 43 delete _spi;
kamtas 0:1e61ade20a23 44
kamtas 0:1e61ade20a23 45 if(_pwr) {
kamtas 0:1e61ade20a23 46 delete _pwr;
kamtas 0:1e61ade20a23 47 }
kamtas 0:1e61ade20a23 48
kamtas 0:1e61ade20a23 49 delete _led;
kamtas 0:1e61ade20a23 50 delete _sce;
kamtas 0:1e61ade20a23 51 delete _rst;
kamtas 0:1e61ade20a23 52 delete _dc;
kamtas 0:1e61ade20a23 53 }
kamtas 0:1e61ade20a23 54
kamtas 0:1e61ade20a23 55 // initialise function - powers up and sends the initialisation commands
kamtas 0:1e61ade20a23 56 void N5110::init()
kamtas 0:1e61ade20a23 57 {
kamtas 0:1e61ade20a23 58 turnOn(); // power up
kamtas 0:1e61ade20a23 59 reset(); // reset LCD - must be done within 100 ms
kamtas 2:1900a4144537 60
kamtas 2:1900a4144537 61 initSPI();
kamtas 2:1900a4144537 62 // function set - extended
kamtas 2:1900a4144537 63 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
kamtas 2:1900a4144537 64 // Don't completely understand these parameters - they seem to work as they are
kamtas 2:1900a4144537 65 // Consult the datasheet if you need to change them
kamtas 2:1900a4144537 66 sendCommand(CMD_VOP_7V38); // operating voltage - these values are from Chris Yan's Library
kamtas 2:1900a4144537 67 sendCommand(CMD_TC_TEMP_2); // temperature control
kamtas 2:1900a4144537 68 sendCommand(CMD_BI_MUX_48); // changing this can sometimes improve the contrast on some displays
kamtas 2:1900a4144537 69
kamtas 2:1900a4144537 70 // function set - basic
kamtas 2:1900a4144537 71 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
kamtas 0:1e61ade20a23 72 normalMode(); // normal video mode by default
kamtas 2:1900a4144537 73 sendCommand(CMD_DC_NORMAL_MODE); // black on white
kamtas 2:1900a4144537 74
kamtas 2:1900a4144537 75 clearRAM(); // RAM is undefined at power-up so clear
kamtas 0:1e61ade20a23 76 clear(); // clear buffer
kamtas 0:1e61ade20a23 77 setBrightness(0.5);
kamtas 0:1e61ade20a23 78 }
kamtas 0:1e61ade20a23 79
kamtas 0:1e61ade20a23 80 // sets normal video mode (black on white)
kamtas 0:1e61ade20a23 81 void N5110::normalMode()
kamtas 0:1e61ade20a23 82 {
kamtas 2:1900a4144537 83 sendCommand(CMD_DC_NORMAL_MODE);
kamtas 0:1e61ade20a23 84 }
kamtas 0:1e61ade20a23 85
kamtas 0:1e61ade20a23 86 // sets normal video mode (white on black)
kamtas 0:1e61ade20a23 87 void N5110::inverseMode()
kamtas 0:1e61ade20a23 88 {
kamtas 2:1900a4144537 89 sendCommand(CMD_DC_INVERT_VIDEO);
kamtas 0:1e61ade20a23 90 }
kamtas 0:1e61ade20a23 91
kamtas 0:1e61ade20a23 92 // function to power up the LCD and backlight - only works when using GPIO to power
kamtas 0:1e61ade20a23 93 void N5110::turnOn()
kamtas 0:1e61ade20a23 94 {
kamtas 0:1e61ade20a23 95 if (_pwr != NULL) {
kamtas 0:1e61ade20a23 96 _pwr->write(1); // apply power
kamtas 0:1e61ade20a23 97 }
kamtas 0:1e61ade20a23 98 }
kamtas 0:1e61ade20a23 99
kamtas 0:1e61ade20a23 100 // function to power down LCD
kamtas 0:1e61ade20a23 101 void N5110::turnOff()
kamtas 0:1e61ade20a23 102 {
kamtas 0:1e61ade20a23 103 clear(); // clear buffer
kamtas 0:1e61ade20a23 104 refresh();
kamtas 0:1e61ade20a23 105 setBrightness(0.0); // turn backlight off
kamtas 0:1e61ade20a23 106 clearRAM(); // clear RAM to ensure specified current consumption
kamtas 0:1e61ade20a23 107 // send command to ensure we are in basic mode
kamtas 2:1900a4144537 108 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
kamtas 2:1900a4144537 109 // clear the display
kamtas 2:1900a4144537 110 sendCommand(CMD_DC_CLEAR_DISPLAY);
kamtas 2:1900a4144537 111 // enter the extended mode and power down
kamtas 2:1900a4144537 112 sendCommand(0x20 | CMD_FS_POWER_DOWN_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
kamtas 2:1900a4144537 113 // small delay and then turn off the power pin
kamtas 2:1900a4144537 114 wait_ms(10);
kamtas 2:1900a4144537 115
kamtas 0:1e61ade20a23 116 // if we are powering the LCD using the GPIO then make it low to turn off
kamtas 0:1e61ade20a23 117 if (_pwr != NULL) {
kamtas 0:1e61ade20a23 118 _pwr->write(0); // turn off power
kamtas 0:1e61ade20a23 119 }
kamtas 0:1e61ade20a23 120
kamtas 0:1e61ade20a23 121 }
kamtas 0:1e61ade20a23 122
kamtas 0:1e61ade20a23 123 // function to change LED backlight brightness
kamtas 0:1e61ade20a23 124 void N5110::setBrightness(float brightness)
kamtas 0:1e61ade20a23 125 {
kamtas 0:1e61ade20a23 126 // check whether brightness is within range
kamtas 0:1e61ade20a23 127 if (brightness < 0.0f)
kamtas 0:1e61ade20a23 128 brightness = 0.0f;
kamtas 0:1e61ade20a23 129 if (brightness > 1.0f)
kamtas 0:1e61ade20a23 130 brightness = 1.0f;
kamtas 0:1e61ade20a23 131 // set PWM duty cycle
kamtas 0:1e61ade20a23 132 _led->write(brightness);
kamtas 0:1e61ade20a23 133 }
kamtas 0:1e61ade20a23 134
kamtas 0:1e61ade20a23 135
kamtas 0:1e61ade20a23 136 // pulse the active low reset line
kamtas 0:1e61ade20a23 137 void N5110::reset()
kamtas 0:1e61ade20a23 138 {
kamtas 0:1e61ade20a23 139 _rst->write(0); // reset the LCD
kamtas 0:1e61ade20a23 140 _rst->write(1);
kamtas 0:1e61ade20a23 141 }
kamtas 0:1e61ade20a23 142
kamtas 0:1e61ade20a23 143 // function to initialise SPI peripheral
kamtas 0:1e61ade20a23 144 void N5110::initSPI()
kamtas 0:1e61ade20a23 145 {
kamtas 0:1e61ade20a23 146 _spi->format(8,1); // 8 bits, Mode 1 - polarity 0, phase 1 - base value of clock is 0, data captured on falling edge/propagated on rising edge
kamtas 0:1e61ade20a23 147 _spi->frequency(4000000); // maximum of screen is 4 MHz
kamtas 0:1e61ade20a23 148 }
kamtas 0:1e61ade20a23 149
kamtas 0:1e61ade20a23 150 // send a command to the display
kamtas 0:1e61ade20a23 151 void N5110::sendCommand(unsigned char command)
kamtas 0:1e61ade20a23 152 {
kamtas 0:1e61ade20a23 153 _dc->write(0); // set DC low for command
kamtas 0:1e61ade20a23 154 _sce->write(0); // set CE low to begin frame
kamtas 0:1e61ade20a23 155 _spi->write(command); // send command
kamtas 0:1e61ade20a23 156 _dc->write(1); // turn back to data by default
kamtas 0:1e61ade20a23 157 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
kamtas 0:1e61ade20a23 158 }
kamtas 0:1e61ade20a23 159
kamtas 0:1e61ade20a23 160 // send data to the display at the current XY address
kamtas 0:1e61ade20a23 161 // dc is set to 1 (i.e. data) after sending a command and so should
kamtas 0:1e61ade20a23 162 // be the default mode.
kamtas 0:1e61ade20a23 163 void N5110::sendData(unsigned char data)
kamtas 0:1e61ade20a23 164 {
kamtas 0:1e61ade20a23 165 _sce->write(0); // set CE low to begin frame
kamtas 0:1e61ade20a23 166 _spi->write(data);
kamtas 0:1e61ade20a23 167 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
kamtas 0:1e61ade20a23 168 }
kamtas 0:1e61ade20a23 169
kamtas 0:1e61ade20a23 170 // this function writes 0 to the 504 bytes to clear the RAM
kamtas 0:1e61ade20a23 171 void N5110::clearRAM()
kamtas 0:1e61ade20a23 172 {
kamtas 0:1e61ade20a23 173 _sce->write(0); //set CE low to begin frame
kamtas 0:1e61ade20a23 174 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
kamtas 0:1e61ade20a23 175 _spi->write(0x00); // send 0's
kamtas 0:1e61ade20a23 176 }
kamtas 0:1e61ade20a23 177 _sce->write(1); // set CE high to end frame
kamtas 0:1e61ade20a23 178 }
kamtas 0:1e61ade20a23 179
kamtas 0:1e61ade20a23 180 // function to set the XY address in RAM for subsequenct data write
kamtas 0:1e61ade20a23 181 void N5110::setXYAddress(unsigned int const x,
kamtas 0:1e61ade20a23 182 unsigned int const y)
kamtas 0:1e61ade20a23 183 {
kamtas 0:1e61ade20a23 184 if (x<WIDTH && y<HEIGHT) { // check within range
kamtas 2:1900a4144537 185 sendCommand(0x80 | x); // send addresses to display with relevant mask
kamtas 2:1900a4144537 186 sendCommand(0x40 | y);
kamtas 0:1e61ade20a23 187 }
kamtas 0:1e61ade20a23 188 }
kamtas 0:1e61ade20a23 189
kamtas 0:1e61ade20a23 190 // These functions are used to set, clear and get the value of pixels in the display
kamtas 0:1e61ade20a23 191 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
kamtas 0:1e61ade20a23 192 // function must be called after set and clear in order to update the display
kamtas 0:1e61ade20a23 193 void N5110::setPixel(unsigned int const x,
kamtas 2:1900a4144537 194 unsigned int const y)
kamtas 0:1e61ade20a23 195 {
kamtas 0:1e61ade20a23 196 if (x<WIDTH && y<HEIGHT) { // check within range
kamtas 0:1e61ade20a23 197 // calculate bank and shift 1 to required position in the data byte
kamtas 2:1900a4144537 198 buffer[x][y/8] |= (1 << y%8);
kamtas 0:1e61ade20a23 199 }
kamtas 0:1e61ade20a23 200 }
kamtas 0:1e61ade20a23 201
kamtas 0:1e61ade20a23 202 void N5110::clearPixel(unsigned int const x,
kamtas 0:1e61ade20a23 203 unsigned int const y)
kamtas 0:1e61ade20a23 204 {
kamtas 0:1e61ade20a23 205 if (x<WIDTH && y<HEIGHT) { // check within range
kamtas 0:1e61ade20a23 206 // calculate bank and shift 1 to required position (using bit clear)
kamtas 0:1e61ade20a23 207 buffer[x][y/8] &= ~(1 << y%8);
kamtas 0:1e61ade20a23 208 }
kamtas 0:1e61ade20a23 209 }
kamtas 0:1e61ade20a23 210
kamtas 0:1e61ade20a23 211 int N5110::getPixel(unsigned int const x,
kamtas 0:1e61ade20a23 212 unsigned int const y) const
kamtas 0:1e61ade20a23 213 {
kamtas 0:1e61ade20a23 214 if (x<WIDTH && y<HEIGHT) { // check within range
kamtas 0:1e61ade20a23 215 // return relevant bank and mask required bit
kamtas 0:1e61ade20a23 216
kamtas 0:1e61ade20a23 217 int pixel = (int) buffer[x][y/8] & (1 << y%8);
kamtas 0:1e61ade20a23 218
kamtas 0:1e61ade20a23 219 if (pixel)
kamtas 0:1e61ade20a23 220 return 1;
kamtas 0:1e61ade20a23 221 else
kamtas 0:1e61ade20a23 222 return 0;
kamtas 0:1e61ade20a23 223 }
kamtas 0:1e61ade20a23 224
kamtas 0:1e61ade20a23 225 return 0;
kamtas 0:1e61ade20a23 226
kamtas 0:1e61ade20a23 227 }
kamtas 0:1e61ade20a23 228
kamtas 0:1e61ade20a23 229 // function to refresh the display
kamtas 0:1e61ade20a23 230 void N5110::refresh()
kamtas 0:1e61ade20a23 231 {
kamtas 0:1e61ade20a23 232 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
kamtas 0:1e61ade20a23 233 // address auto increments after printing string, so buffer[0][0] will not coincide
kamtas 0:1e61ade20a23 234 // with top-left pixel after priting string
kamtas 0:1e61ade20a23 235
kamtas 0:1e61ade20a23 236 _sce->write(0); //set CE low to begin frame
kamtas 0:1e61ade20a23 237
kamtas 0:1e61ade20a23 238 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
kamtas 0:1e61ade20a23 239 for(int i = 0; i < WIDTH; i++) {
kamtas 0:1e61ade20a23 240 _spi->write(buffer[i][j]); // send buffer
kamtas 0:1e61ade20a23 241 }
kamtas 0:1e61ade20a23 242 }
kamtas 0:1e61ade20a23 243 _sce->write(1); // set CE high to end frame
kamtas 0:1e61ade20a23 244
kamtas 0:1e61ade20a23 245 }
kamtas 0:1e61ade20a23 246
kamtas 0:1e61ade20a23 247 // fills the buffer with random bytes. Can be used to test the display.
kamtas 0:1e61ade20a23 248 // The rand() function isn't seeded so it probably creates the same pattern everytime
kamtas 0:1e61ade20a23 249 void N5110::randomiseBuffer()
kamtas 0:1e61ade20a23 250 {
kamtas 0:1e61ade20a23 251 int i,j;
kamtas 0:1e61ade20a23 252 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
kamtas 0:1e61ade20a23 253 for(i = 0; i < WIDTH; i++) {
kamtas 0:1e61ade20a23 254 buffer[i][j] = rand()%256; // generate random byte
kamtas 0:1e61ade20a23 255 }
kamtas 0:1e61ade20a23 256 }
kamtas 0:1e61ade20a23 257
kamtas 0:1e61ade20a23 258 }
kamtas 0:1e61ade20a23 259
kamtas 0:1e61ade20a23 260 // function to print 5x7 font
kamtas 0:1e61ade20a23 261 void N5110::printChar(char const c,
kamtas 0:1e61ade20a23 262 unsigned int const x,
kamtas 0:1e61ade20a23 263 unsigned int const y)
kamtas 0:1e61ade20a23 264 {
kamtas 0:1e61ade20a23 265 if (y<BANKS) { // check if printing in range of y banks
kamtas 0:1e61ade20a23 266
kamtas 0:1e61ade20a23 267 for (int i = 0; i < 5 ; i++ ) {
kamtas 0:1e61ade20a23 268 int pixel_x = x+i;
kamtas 0:1e61ade20a23 269 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
kamtas 0:1e61ade20a23 270 break;
kamtas 0:1e61ade20a23 271 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
kamtas 0:1e61ade20a23 272 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
kamtas 0:1e61ade20a23 273 }
kamtas 0:1e61ade20a23 274
kamtas 0:1e61ade20a23 275 }
kamtas 0:1e61ade20a23 276 }
kamtas 0:1e61ade20a23 277
kamtas 0:1e61ade20a23 278 // function to print string at specified position
kamtas 0:1e61ade20a23 279 void N5110::printString(const char *str,
kamtas 0:1e61ade20a23 280 unsigned int const x,
kamtas 0:1e61ade20a23 281 unsigned int const y)
kamtas 0:1e61ade20a23 282 {
kamtas 0:1e61ade20a23 283 if (y<BANKS) { // check if printing in range of y banks
kamtas 0:1e61ade20a23 284
kamtas 0:1e61ade20a23 285 int n = 0 ; // counter for number of characters in string
kamtas 0:1e61ade20a23 286 // loop through string and print character
kamtas 0:1e61ade20a23 287 while(*str) {
kamtas 0:1e61ade20a23 288
kamtas 0:1e61ade20a23 289 // writes the character bitmap data to the buffer, so that
kamtas 0:1e61ade20a23 290 // text and pixels can be displayed at the same time
kamtas 0:1e61ade20a23 291 for (int i = 0; i < 5 ; i++ ) {
kamtas 0:1e61ade20a23 292 int pixel_x = x+i+n*6;
kamtas 0:1e61ade20a23 293 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
kamtas 0:1e61ade20a23 294 break;
kamtas 0:1e61ade20a23 295 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
kamtas 0:1e61ade20a23 296 }
kamtas 0:1e61ade20a23 297 str++; // go to next character in string
kamtas 0:1e61ade20a23 298 n++; // increment index
kamtas 0:1e61ade20a23 299 }
kamtas 0:1e61ade20a23 300 }
kamtas 0:1e61ade20a23 301 }
kamtas 0:1e61ade20a23 302
kamtas 0:1e61ade20a23 303 // function to clear the screen buffer
kamtas 0:1e61ade20a23 304 void N5110::clear()
kamtas 0:1e61ade20a23 305 {
kamtas 0:1e61ade20a23 306 memset(buffer,0,sizeof(buffer));
kamtas 0:1e61ade20a23 307 }
kamtas 0:1e61ade20a23 308
kamtas 0:1e61ade20a23 309 // function to plot array on display
kamtas 0:1e61ade20a23 310 void N5110::plotArray(float const array[])
kamtas 0:1e61ade20a23 311 {
kamtas 0:1e61ade20a23 312 for (int i=0; i<WIDTH; i++) { // loop through array
kamtas 0:1e61ade20a23 313 // elements are normalised from 0.0 to 1.0, so multiply
kamtas 0:1e61ade20a23 314 // by 47 to convert to pixel range, and subtract from 47
kamtas 0:1e61ade20a23 315 // since top-left is 0,0 in the display geometry
kamtas 2:1900a4144537 316 setPixel(i,47 - int(array[i]*47.0f));
kamtas 0:1e61ade20a23 317 }
kamtas 0:1e61ade20a23 318
kamtas 0:1e61ade20a23 319 }
kamtas 0:1e61ade20a23 320
kamtas 0:1e61ade20a23 321 // function to draw circle
kamtas 0:1e61ade20a23 322 void N5110:: drawCircle(unsigned int const x0,
kamtas 0:1e61ade20a23 323 unsigned int const y0,
kamtas 0:1e61ade20a23 324 unsigned int const radius,
kamtas 0:1e61ade20a23 325 FillType const fill)
kamtas 0:1e61ade20a23 326 {
kamtas 0:1e61ade20a23 327 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
kamtas 0:1e61ade20a23 328 int x = radius;
kamtas 0:1e61ade20a23 329 int y = 0;
kamtas 0:1e61ade20a23 330 int radiusError = 1-x;
kamtas 0:1e61ade20a23 331
kamtas 0:1e61ade20a23 332 while(x >= y) {
kamtas 0:1e61ade20a23 333
kamtas 0:1e61ade20a23 334 // if transparent, just draw outline
kamtas 0:1e61ade20a23 335 if (fill == FILL_TRANSPARENT) {
kamtas 2:1900a4144537 336 setPixel( x + x0, y + y0);
kamtas 2:1900a4144537 337 setPixel(-x + x0, y + y0);
kamtas 2:1900a4144537 338 setPixel( y + x0, x + y0);
kamtas 2:1900a4144537 339 setPixel(-y + x0, x + y0);
kamtas 2:1900a4144537 340 setPixel(-y + x0, -x + y0);
kamtas 2:1900a4144537 341 setPixel( y + x0, -x + y0);
kamtas 2:1900a4144537 342 setPixel( x + x0, -y + y0);
kamtas 2:1900a4144537 343 setPixel(-x + x0, -y + y0);
kamtas 0:1e61ade20a23 344 } else { // drawing filled circle, so draw lines between points at same y value
kamtas 0:1e61ade20a23 345
kamtas 0:1e61ade20a23 346 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
kamtas 0:1e61ade20a23 347
kamtas 0:1e61ade20a23 348 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
kamtas 0:1e61ade20a23 349 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
kamtas 0:1e61ade20a23 350 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
kamtas 0:1e61ade20a23 351 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
kamtas 0:1e61ade20a23 352 }
kamtas 0:1e61ade20a23 353
kamtas 0:1e61ade20a23 354 y++;
kamtas 0:1e61ade20a23 355 if (radiusError<0) {
kamtas 0:1e61ade20a23 356 radiusError += 2 * y + 1;
kamtas 0:1e61ade20a23 357 } else {
kamtas 0:1e61ade20a23 358 x--;
kamtas 0:1e61ade20a23 359 radiusError += 2 * (y - x) + 1;
kamtas 0:1e61ade20a23 360 }
kamtas 0:1e61ade20a23 361 }
kamtas 0:1e61ade20a23 362
kamtas 0:1e61ade20a23 363 }
kamtas 0:1e61ade20a23 364
kamtas 0:1e61ade20a23 365 void N5110::drawLine(unsigned int const x0,
kamtas 0:1e61ade20a23 366 unsigned int const y0,
kamtas 0:1e61ade20a23 367 unsigned int const x1,
kamtas 0:1e61ade20a23 368 unsigned int const y1,
kamtas 0:1e61ade20a23 369 unsigned int const type)
kamtas 0:1e61ade20a23 370 {
kamtas 2:1900a4144537 371 int y_range = y1-y0; // calc range of y and x
kamtas 2:1900a4144537 372 int x_range = x1-x0;
kamtas 2:1900a4144537 373 int start,stop,step;
kamtas 0:1e61ade20a23 374
kamtas 0:1e61ade20a23 375 // if dotted line, set step to 2, else step is 1
kamtas 2:1900a4144537 376 step = (type==2) ? 2:1;
kamtas 0:1e61ade20a23 377
kamtas 0:1e61ade20a23 378 // make sure we loop over the largest range to get the most pixels on the display
kamtas 0:1e61ade20a23 379 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
kamtas 0:1e61ade20a23 380 // or else we'll only end up with 1 pixel in the x column
kamtas 0:1e61ade20a23 381 if ( abs(x_range) > abs(y_range) ) {
kamtas 0:1e61ade20a23 382
kamtas 0:1e61ade20a23 383 // ensure we loop from smallest to largest or else for-loop won't run as expected
kamtas 2:1900a4144537 384 start = x1>x0 ? x0:x1;
kamtas 2:1900a4144537 385 stop = x1>x0 ? x1:x0;
kamtas 0:1e61ade20a23 386
kamtas 0:1e61ade20a23 387 // loop between x pixels
kamtas 2:1900a4144537 388 for (int x = start; x<= stop ; x+=step) {
kamtas 0:1e61ade20a23 389 // do linear interpolation
kamtas 2:1900a4144537 390 int y = y0 + (y1-y0)*(x-x0)/(x1-x0);
kamtas 0:1e61ade20a23 391
kamtas 2:1900a4144537 392 if (type == 0) // if 'white' line, turn off pixel
kamtas 2:1900a4144537 393 clearPixel(x,y);
kamtas 2:1900a4144537 394 else
kamtas 2:1900a4144537 395 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
kamtas 0:1e61ade20a23 396 }
kamtas 0:1e61ade20a23 397 } else {
kamtas 0:1e61ade20a23 398
kamtas 0:1e61ade20a23 399 // ensure we loop from smallest to largest or else for-loop won't run as expected
kamtas 2:1900a4144537 400 start = y1>y0 ? y0:y1;
kamtas 2:1900a4144537 401 stop = y1>y0 ? y1:y0;
kamtas 0:1e61ade20a23 402
kamtas 2:1900a4144537 403 for (int y = start; y<= stop ; y+=step) {
kamtas 0:1e61ade20a23 404 // do linear interpolation
kamtas 2:1900a4144537 405 int x = x0 + (x1-x0)*(y-y0)/(y1-y0);
kamtas 0:1e61ade20a23 406
kamtas 2:1900a4144537 407 if (type == 0) // if 'white' line, turn off pixel
kamtas 2:1900a4144537 408 clearPixel(x,y);
kamtas 2:1900a4144537 409 else
kamtas 2:1900a4144537 410 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
kamtas 2:1900a4144537 411
kamtas 0:1e61ade20a23 412 }
kamtas 0:1e61ade20a23 413 }
kamtas 0:1e61ade20a23 414
kamtas 0:1e61ade20a23 415 }
kamtas 0:1e61ade20a23 416
kamtas 0:1e61ade20a23 417 void N5110::drawRect(unsigned int const x0,
kamtas 0:1e61ade20a23 418 unsigned int const y0,
kamtas 0:1e61ade20a23 419 unsigned int const width,
kamtas 0:1e61ade20a23 420 unsigned int const height,
kamtas 0:1e61ade20a23 421 FillType const fill)
kamtas 0:1e61ade20a23 422 {
kamtas 0:1e61ade20a23 423 if (fill == FILL_TRANSPARENT) { // transparent, just outline
kamtas 0:1e61ade20a23 424 drawLine(x0,y0,x0+(width-1),y0,1); // top
kamtas 0:1e61ade20a23 425 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
kamtas 0:1e61ade20a23 426 drawLine(x0,y0,x0,y0+(height-1),1); // left
kamtas 0:1e61ade20a23 427 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
kamtas 0:1e61ade20a23 428 } else { // filled rectangle
kamtas 0:1e61ade20a23 429 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
kamtas 0:1e61ade20a23 430 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
kamtas 0:1e61ade20a23 431 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
kamtas 0:1e61ade20a23 432 }
kamtas 0:1e61ade20a23 433 }
kamtas 0:1e61ade20a23 434 }