ELEC2645 (2019/20) / Mbed 2 deprecated ELEC2645_PROJECT_EL18KK

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Dependencies:   mbed

Gamepad2/N5110.cpp@0:e47aa16004e6, 2020-04-24 (annotated)

Committer:
KaifK
Date:
Fri Apr 24 22:24:14 2020 +0000
Revision:
0:e47aa16004e6
game idea confirmed and all sprites drawn;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
KaifK 0:e47aa16004e6 1 #include "mbed.h"
KaifK 0:e47aa16004e6 2 #include "N5110.h"
KaifK 0:e47aa16004e6 3
KaifK 0:e47aa16004e6 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
KaifK 0:e47aa16004e6 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
KaifK 0:e47aa16004e6 6 // to power LCD. Doesn't work well with K64F.
KaifK 0:e47aa16004e6 7 N5110::N5110(PinName const pwrPin,
KaifK 0:e47aa16004e6 8 PinName const scePin,
KaifK 0:e47aa16004e6 9 PinName const rstPin,
KaifK 0:e47aa16004e6 10 PinName const dcPin,
KaifK 0:e47aa16004e6 11 PinName const mosiPin,
KaifK 0:e47aa16004e6 12 PinName const sclkPin,
KaifK 0:e47aa16004e6 13 PinName const ledPin)
KaifK 0:e47aa16004e6 14 :
KaifK 0:e47aa16004e6 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
KaifK 0:e47aa16004e6 16 _led(new DigitalOut(ledPin)),
KaifK 0:e47aa16004e6 17 _pwr(new DigitalOut(pwrPin)),
KaifK 0:e47aa16004e6 18 _sce(new DigitalOut(scePin)),
KaifK 0:e47aa16004e6 19 _rst(new DigitalOut(rstPin)),
KaifK 0:e47aa16004e6 20 _dc(new DigitalOut(dcPin))
KaifK 0:e47aa16004e6 21 {}
KaifK 0:e47aa16004e6 22
KaifK 0:e47aa16004e6 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
KaifK 0:e47aa16004e6 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
KaifK 0:e47aa16004e6 25 // drive the LCD.
KaifK 0:e47aa16004e6 26 N5110::N5110(PinName const scePin,
KaifK 0:e47aa16004e6 27 PinName const rstPin,
KaifK 0:e47aa16004e6 28 PinName const dcPin,
KaifK 0:e47aa16004e6 29 PinName const mosiPin,
KaifK 0:e47aa16004e6 30 PinName const sclkPin,
KaifK 0:e47aa16004e6 31 PinName const ledPin)
KaifK 0:e47aa16004e6 32 :
KaifK 0:e47aa16004e6 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
KaifK 0:e47aa16004e6 34 _led(new DigitalOut(ledPin)),
KaifK 0:e47aa16004e6 35 _pwr(NULL), // pwr not needed so null it to be safe
KaifK 0:e47aa16004e6 36 _sce(new DigitalOut(scePin)),
KaifK 0:e47aa16004e6 37 _rst(new DigitalOut(rstPin)),
KaifK 0:e47aa16004e6 38 _dc(new DigitalOut(dcPin))
KaifK 0:e47aa16004e6 39 {}
KaifK 0:e47aa16004e6 40 // Second overload contructor uses the New Gamepad (Rev 2.1) pin mappings
KaifK 0:e47aa16004e6 41 N5110::N5110()
KaifK 0:e47aa16004e6 42 :
KaifK 0:e47aa16004e6 43 _spi(new SPI(PTD2,NC,PTD1)), // create new SPI instance and initialise
KaifK 0:e47aa16004e6 44 _led(new DigitalOut(PTB23)),
KaifK 0:e47aa16004e6 45 _pwr(NULL), // pwr not needed so null it to be safe
KaifK 0:e47aa16004e6 46 _sce(new DigitalOut(PTB19)),
KaifK 0:e47aa16004e6 47 _rst(new DigitalOut(PTC1)),
KaifK 0:e47aa16004e6 48 _dc(new DigitalOut(PTB18))
KaifK 0:e47aa16004e6 49 {}
KaifK 0:e47aa16004e6 50
KaifK 0:e47aa16004e6 51 N5110::~N5110()
KaifK 0:e47aa16004e6 52 {
KaifK 0:e47aa16004e6 53 delete _spi;
KaifK 0:e47aa16004e6 54
KaifK 0:e47aa16004e6 55 if(_pwr) {
KaifK 0:e47aa16004e6 56 delete _pwr;
KaifK 0:e47aa16004e6 57 }
KaifK 0:e47aa16004e6 58
KaifK 0:e47aa16004e6 59 delete _led;
KaifK 0:e47aa16004e6 60 delete _sce;
KaifK 0:e47aa16004e6 61 delete _rst;
KaifK 0:e47aa16004e6 62 delete _dc;
KaifK 0:e47aa16004e6 63 }
KaifK 0:e47aa16004e6 64
KaifK 0:e47aa16004e6 65 // initialise function - powers up and sends the initialisation commands
KaifK 0:e47aa16004e6 66 void N5110::init()
KaifK 0:e47aa16004e6 67 {
KaifK 0:e47aa16004e6 68 turnOn(); // power up
KaifK 0:e47aa16004e6 69 reset(); // reset LCD - must be done within 100 ms
KaifK 0:e47aa16004e6 70 initSPI();
KaifK 0:e47aa16004e6 71
KaifK 0:e47aa16004e6 72 backLightOn();
KaifK 0:e47aa16004e6 73 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
KaifK 0:e47aa16004e6 74 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
KaifK 0:e47aa16004e6 75 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
KaifK 0:e47aa16004e6 76 normalMode(); // normal video mode by default
KaifK 0:e47aa16004e6 77
KaifK 0:e47aa16004e6 78 clearRAM(); // RAM is undefined at power-up so clear to be sure
KaifK 0:e47aa16004e6 79 clear(); // clear buffer
KaifK 0:e47aa16004e6 80 }
KaifK 0:e47aa16004e6 81
KaifK 0:e47aa16004e6 82 // sets normal video mode (black on white)
KaifK 0:e47aa16004e6 83 void N5110::normalMode()
KaifK 0:e47aa16004e6 84 {
KaifK 0:e47aa16004e6 85 sendCommand(0b00100000); // basic instruction
KaifK 0:e47aa16004e6 86 sendCommand(0b00001100); // normal video mode- datasheet
KaifK 0:e47aa16004e6 87 }
KaifK 0:e47aa16004e6 88
KaifK 0:e47aa16004e6 89 // sets normal video mode (white on black)
KaifK 0:e47aa16004e6 90 void N5110::inverseMode()
KaifK 0:e47aa16004e6 91 {
KaifK 0:e47aa16004e6 92 sendCommand(0b00100000); // basic instruction
KaifK 0:e47aa16004e6 93 sendCommand(0b00001101); // inverse video mode - datasheet
KaifK 0:e47aa16004e6 94 }
KaifK 0:e47aa16004e6 95
KaifK 0:e47aa16004e6 96 // function to power up the LCD and backlight - only works when using GPIO to power
KaifK 0:e47aa16004e6 97 void N5110::turnOn()
KaifK 0:e47aa16004e6 98 {
KaifK 0:e47aa16004e6 99 if (_pwr != NULL) {
KaifK 0:e47aa16004e6 100 _pwr->write(1); // apply power
KaifK 0:e47aa16004e6 101 }
KaifK 0:e47aa16004e6 102 }
KaifK 0:e47aa16004e6 103
KaifK 0:e47aa16004e6 104 // function to power down LCD
KaifK 0:e47aa16004e6 105 void N5110::turnOff()
KaifK 0:e47aa16004e6 106 {
KaifK 0:e47aa16004e6 107 clear(); // clear buffer
KaifK 0:e47aa16004e6 108 refresh();
KaifK 0:e47aa16004e6 109 backLightOff(); // turn backlight off
KaifK 0:e47aa16004e6 110 clearRAM(); // clear RAM to ensure specified current consumption
KaifK 0:e47aa16004e6 111 // send command to ensure we are in basic mode
KaifK 0:e47aa16004e6 112
KaifK 0:e47aa16004e6 113 sendCommand(0b00100000); // basic mode
KaifK 0:e47aa16004e6 114 sendCommand(0b00001000); // clear display
KaifK 0:e47aa16004e6 115 sendCommand(0b00100001); // extended mode
KaifK 0:e47aa16004e6 116 sendCommand(0b00100100); // power down
KaifK 0:e47aa16004e6 117
KaifK 0:e47aa16004e6 118 // if we are powering the LCD using the GPIO then make it low to turn off
KaifK 0:e47aa16004e6 119 if (_pwr != NULL) {
KaifK 0:e47aa16004e6 120 wait_ms(10); // small delay and then turn off the power pin
KaifK 0:e47aa16004e6 121 _pwr->write(0); // turn off power
KaifK 0:e47aa16004e6 122 }
KaifK 0:e47aa16004e6 123
KaifK 0:e47aa16004e6 124 }
KaifK 0:e47aa16004e6 125
KaifK 0:e47aa16004e6 126 // function to change LED backlight brightness
KaifK 0:e47aa16004e6 127 void N5110::backLightOn()
KaifK 0:e47aa16004e6 128 {
KaifK 0:e47aa16004e6 129 _led->write(1);
KaifK 0:e47aa16004e6 130 }
KaifK 0:e47aa16004e6 131
KaifK 0:e47aa16004e6 132 // function to change LED backlight brightness
KaifK 0:e47aa16004e6 133 void N5110::backLightOff()
KaifK 0:e47aa16004e6 134 {
KaifK 0:e47aa16004e6 135 _led->write(0);
KaifK 0:e47aa16004e6 136 }
KaifK 0:e47aa16004e6 137
KaifK 0:e47aa16004e6 138 void N5110::setContrast(float contrast) {
KaifK 0:e47aa16004e6 139
KaifK 0:e47aa16004e6 140 // enforce limits
KaifK 0:e47aa16004e6 141 if (contrast > 1.0f)
KaifK 0:e47aa16004e6 142 contrast = 1.0f;
KaifK 0:e47aa16004e6 143 else if (contrast < 0.0f)
KaifK 0:e47aa16004e6 144 contrast = 0.0;
KaifK 0:e47aa16004e6 145
KaifK 0:e47aa16004e6 146 // convert to char in range 0 to 127 (i.e. 6 bits)
KaifK 0:e47aa16004e6 147 char ic = char(contrast*127.0f);
KaifK 0:e47aa16004e6 148
KaifK 0:e47aa16004e6 149 sendCommand(0b00100001); // extended instruction set
KaifK 0:e47aa16004e6 150 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
KaifK 0:e47aa16004e6 151 sendCommand(0b00100000); // back to basic instruction set
KaifK 0:e47aa16004e6 152 }
KaifK 0:e47aa16004e6 153
KaifK 0:e47aa16004e6 154 void N5110::setTempCoefficient(char tc) {
KaifK 0:e47aa16004e6 155
KaifK 0:e47aa16004e6 156 // enforce limits
KaifK 0:e47aa16004e6 157 if (tc>3) {
KaifK 0:e47aa16004e6 158 tc=3;
KaifK 0:e47aa16004e6 159 }
KaifK 0:e47aa16004e6 160
KaifK 0:e47aa16004e6 161 // temperature coefficient may need increasing at low temperatures
KaifK 0:e47aa16004e6 162
KaifK 0:e47aa16004e6 163 sendCommand(0b00100001); // extended instruction set
KaifK 0:e47aa16004e6 164 sendCommand(0b00000100 | tc);
KaifK 0:e47aa16004e6 165 sendCommand(0b00100000); // back to basic instruction set
KaifK 0:e47aa16004e6 166 }
KaifK 0:e47aa16004e6 167
KaifK 0:e47aa16004e6 168 void N5110::setBias(char bias) {
KaifK 0:e47aa16004e6 169
KaifK 0:e47aa16004e6 170 // from data sheet
KaifK 0:e47aa16004e6 171 // bias mux rate
KaifK 0:e47aa16004e6 172 // 0 1:100
KaifK 0:e47aa16004e6 173 // 1 1:80
KaifK 0:e47aa16004e6 174 // 2 1:65
KaifK 0:e47aa16004e6 175 // 3 1:48 (default)
KaifK 0:e47aa16004e6 176 // 4 1:40/1:34
KaifK 0:e47aa16004e6 177 // 5 1:24
KaifK 0:e47aa16004e6 178 // 6 1:18/1:16
KaifK 0:e47aa16004e6 179 // 7 1:10/1:9/1:8
KaifK 0:e47aa16004e6 180
KaifK 0:e47aa16004e6 181 // enforce limits
KaifK 0:e47aa16004e6 182 if (bias>7) {
KaifK 0:e47aa16004e6 183 bias=7;
KaifK 0:e47aa16004e6 184 }
KaifK 0:e47aa16004e6 185
KaifK 0:e47aa16004e6 186 sendCommand(0b00100001); // extended mode instruction
KaifK 0:e47aa16004e6 187 sendCommand(0b00010000 | bias);
KaifK 0:e47aa16004e6 188 sendCommand(0b00100000); // end of extended mode instruction
KaifK 0:e47aa16004e6 189 }
KaifK 0:e47aa16004e6 190
KaifK 0:e47aa16004e6 191 // pulse the active low reset line
KaifK 0:e47aa16004e6 192 void N5110::reset()
KaifK 0:e47aa16004e6 193 {
KaifK 0:e47aa16004e6 194 _rst->write(0); // reset the LCD
KaifK 0:e47aa16004e6 195 _rst->write(1);
KaifK 0:e47aa16004e6 196 }
KaifK 0:e47aa16004e6 197
KaifK 0:e47aa16004e6 198 // function to initialise SPI peripheral
KaifK 0:e47aa16004e6 199 void N5110::initSPI()
KaifK 0:e47aa16004e6 200 {
KaifK 0:e47aa16004e6 201 _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
KaifK 0:e47aa16004e6 202 _spi->frequency(4000000); // maximum of screen is 4 MHz
KaifK 0:e47aa16004e6 203 }
KaifK 0:e47aa16004e6 204
KaifK 0:e47aa16004e6 205 // send a command to the display
KaifK 0:e47aa16004e6 206 void N5110::sendCommand(unsigned char command)
KaifK 0:e47aa16004e6 207 {
KaifK 0:e47aa16004e6 208 _dc->write(0); // set DC low for command
KaifK 0:e47aa16004e6 209 _sce->write(0); // set CE low to begin frame
KaifK 0:e47aa16004e6 210 _spi->write(command); // send command
KaifK 0:e47aa16004e6 211 _dc->write(1); // turn back to data by default
KaifK 0:e47aa16004e6 212 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
KaifK 0:e47aa16004e6 213 }
KaifK 0:e47aa16004e6 214
KaifK 0:e47aa16004e6 215 // send data to the display at the current XY address
KaifK 0:e47aa16004e6 216 // dc is set to 1 (i.e. data) after sending a command and so should
KaifK 0:e47aa16004e6 217 // be the default mode.
KaifK 0:e47aa16004e6 218 void N5110::sendData(unsigned char data)
KaifK 0:e47aa16004e6 219 {
KaifK 0:e47aa16004e6 220 _sce->write(0); // set CE low to begin frame
KaifK 0:e47aa16004e6 221 _spi->write(data);
KaifK 0:e47aa16004e6 222 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
KaifK 0:e47aa16004e6 223 }
KaifK 0:e47aa16004e6 224
KaifK 0:e47aa16004e6 225 // this function writes 0 to the 504 bytes to clear the RAM
KaifK 0:e47aa16004e6 226 void N5110::clearRAM()
KaifK 0:e47aa16004e6 227 {
KaifK 0:e47aa16004e6 228 _sce->write(0); //set CE low to begin frame
KaifK 0:e47aa16004e6 229 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
KaifK 0:e47aa16004e6 230 _spi->write(0x00); // send 0's
KaifK 0:e47aa16004e6 231 }
KaifK 0:e47aa16004e6 232 _sce->write(1); // set CE high to end frame
KaifK 0:e47aa16004e6 233 }
KaifK 0:e47aa16004e6 234
KaifK 0:e47aa16004e6 235 // function to set the XY address in RAM for subsequenct data write
KaifK 0:e47aa16004e6 236 void N5110::setXYAddress(unsigned int const x,
KaifK 0:e47aa16004e6 237 unsigned int const y)
KaifK 0:e47aa16004e6 238 {
KaifK 0:e47aa16004e6 239 if (x<WIDTH && y<HEIGHT) { // check within range
KaifK 0:e47aa16004e6 240 sendCommand(0b00100000); // basic instruction
KaifK 0:e47aa16004e6 241 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
KaifK 0:e47aa16004e6 242 sendCommand(0b01000000 | y);
KaifK 0:e47aa16004e6 243 }
KaifK 0:e47aa16004e6 244 }
KaifK 0:e47aa16004e6 245
KaifK 0:e47aa16004e6 246 // These functions are used to set, clear and get the value of pixels in the display
KaifK 0:e47aa16004e6 247 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
KaifK 0:e47aa16004e6 248 // function must be called after set and clear in order to update the display
KaifK 0:e47aa16004e6 249 void N5110::setPixel(unsigned int const x,
KaifK 0:e47aa16004e6 250 unsigned int const y,
KaifK 0:e47aa16004e6 251 bool const state)
KaifK 0:e47aa16004e6 252 {
KaifK 0:e47aa16004e6 253 if (x<WIDTH && y<HEIGHT) { // check within range
KaifK 0:e47aa16004e6 254 // calculate bank and shift 1 to required position in the data byte
KaifK 0:e47aa16004e6 255 if(state) buffer[x][y/8] |= (1 << y%8);
KaifK 0:e47aa16004e6 256 else buffer[x][y/8] &= ~(1 << y%8);
KaifK 0:e47aa16004e6 257 }
KaifK 0:e47aa16004e6 258 }
KaifK 0:e47aa16004e6 259
KaifK 0:e47aa16004e6 260 void N5110::clearPixel(unsigned int const x,
KaifK 0:e47aa16004e6 261 unsigned int const y)
KaifK 0:e47aa16004e6 262 {
KaifK 0:e47aa16004e6 263 if (x<WIDTH && y<HEIGHT) { // check within range
KaifK 0:e47aa16004e6 264 // calculate bank and shift 1 to required position (using bit clear)
KaifK 0:e47aa16004e6 265 buffer[x][y/8] &= ~(1 << y%8);
KaifK 0:e47aa16004e6 266 }
KaifK 0:e47aa16004e6 267 }
KaifK 0:e47aa16004e6 268
KaifK 0:e47aa16004e6 269 int N5110::getPixel(unsigned int const x,
KaifK 0:e47aa16004e6 270 unsigned int const y) const
KaifK 0:e47aa16004e6 271 {
KaifK 0:e47aa16004e6 272 if (x<WIDTH && y<HEIGHT) { // check within range
KaifK 0:e47aa16004e6 273 // return relevant bank and mask required bit
KaifK 0:e47aa16004e6 274
KaifK 0:e47aa16004e6 275 int pixel = (int) buffer[x][y/8] & (1 << y%8);
KaifK 0:e47aa16004e6 276
KaifK 0:e47aa16004e6 277 if (pixel)
KaifK 0:e47aa16004e6 278 return 1;
KaifK 0:e47aa16004e6 279 else
KaifK 0:e47aa16004e6 280 return 0;
KaifK 0:e47aa16004e6 281 }
KaifK 0:e47aa16004e6 282
KaifK 0:e47aa16004e6 283 return 0;
KaifK 0:e47aa16004e6 284
KaifK 0:e47aa16004e6 285 }
KaifK 0:e47aa16004e6 286
KaifK 0:e47aa16004e6 287 // function to refresh the display
KaifK 0:e47aa16004e6 288 void N5110::refresh()
KaifK 0:e47aa16004e6 289 {
KaifK 0:e47aa16004e6 290 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
KaifK 0:e47aa16004e6 291 // address auto increments after printing string, so buffer[0][0] will not coincide
KaifK 0:e47aa16004e6 292 // with top-left pixel after priting string
KaifK 0:e47aa16004e6 293
KaifK 0:e47aa16004e6 294 _sce->write(0); //set CE low to begin frame
KaifK 0:e47aa16004e6 295
KaifK 0:e47aa16004e6 296 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
KaifK 0:e47aa16004e6 297 for(int i = 0; i < WIDTH; i++) {
KaifK 0:e47aa16004e6 298 _spi->write(buffer[i][j]); // send buffer
KaifK 0:e47aa16004e6 299 }
KaifK 0:e47aa16004e6 300 }
KaifK 0:e47aa16004e6 301 _sce->write(1); // set CE high to end frame
KaifK 0:e47aa16004e6 302
KaifK 0:e47aa16004e6 303 }
KaifK 0:e47aa16004e6 304
KaifK 0:e47aa16004e6 305 // fills the buffer with random bytes. Can be used to test the display.
KaifK 0:e47aa16004e6 306 // The rand() function isn't seeded so it probably creates the same pattern everytime
KaifK 0:e47aa16004e6 307 void N5110::randomiseBuffer()
KaifK 0:e47aa16004e6 308 {
KaifK 0:e47aa16004e6 309 int i,j;
KaifK 0:e47aa16004e6 310 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
KaifK 0:e47aa16004e6 311 for(i = 0; i < WIDTH; i++) {
KaifK 0:e47aa16004e6 312 buffer[i][j] = rand()%256; // generate random byte
KaifK 0:e47aa16004e6 313 }
KaifK 0:e47aa16004e6 314 }
KaifK 0:e47aa16004e6 315
KaifK 0:e47aa16004e6 316 }
KaifK 0:e47aa16004e6 317
KaifK 0:e47aa16004e6 318 // function to print 5x7 font
KaifK 0:e47aa16004e6 319 void N5110::printChar(char const c,
KaifK 0:e47aa16004e6 320 unsigned int const x,
KaifK 0:e47aa16004e6 321 unsigned int const y)
KaifK 0:e47aa16004e6 322 {
KaifK 0:e47aa16004e6 323 if (y<BANKS) { // check if printing in range of y banks
KaifK 0:e47aa16004e6 324
KaifK 0:e47aa16004e6 325 for (int i = 0; i < 5 ; i++ ) {
KaifK 0:e47aa16004e6 326 int pixel_x = x+i;
KaifK 0:e47aa16004e6 327 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
KaifK 0:e47aa16004e6 328 break;
KaifK 0:e47aa16004e6 329 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
KaifK 0:e47aa16004e6 330 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
KaifK 0:e47aa16004e6 331 }
KaifK 0:e47aa16004e6 332
KaifK 0:e47aa16004e6 333 }
KaifK 0:e47aa16004e6 334 }
KaifK 0:e47aa16004e6 335
KaifK 0:e47aa16004e6 336 // function to print string at specified position
KaifK 0:e47aa16004e6 337 void N5110::printString(const char *str,
KaifK 0:e47aa16004e6 338 unsigned int const x,
KaifK 0:e47aa16004e6 339 unsigned int const y)
KaifK 0:e47aa16004e6 340 {
KaifK 0:e47aa16004e6 341 if (y<BANKS) { // check if printing in range of y banks
KaifK 0:e47aa16004e6 342
KaifK 0:e47aa16004e6 343 int n = 0 ; // counter for number of characters in string
KaifK 0:e47aa16004e6 344 // loop through string and print character
KaifK 0:e47aa16004e6 345 while(*str) {
KaifK 0:e47aa16004e6 346
KaifK 0:e47aa16004e6 347 // writes the character bitmap data to the buffer, so that
KaifK 0:e47aa16004e6 348 // text and pixels can be displayed at the same time
KaifK 0:e47aa16004e6 349 for (int i = 0; i < 5 ; i++ ) {
KaifK 0:e47aa16004e6 350 int pixel_x = x+i+n*6;
KaifK 0:e47aa16004e6 351 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
KaifK 0:e47aa16004e6 352 break;
KaifK 0:e47aa16004e6 353 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
KaifK 0:e47aa16004e6 354 }
KaifK 0:e47aa16004e6 355 str++; // go to next character in string
KaifK 0:e47aa16004e6 356 n++; // increment index
KaifK 0:e47aa16004e6 357 }
KaifK 0:e47aa16004e6 358 }
KaifK 0:e47aa16004e6 359 }
KaifK 0:e47aa16004e6 360
KaifK 0:e47aa16004e6 361 // function to clear the screen buffer
KaifK 0:e47aa16004e6 362 void N5110::clear()
KaifK 0:e47aa16004e6 363 {
KaifK 0:e47aa16004e6 364 memset(buffer,0,sizeof(buffer));
KaifK 0:e47aa16004e6 365 }
KaifK 0:e47aa16004e6 366
KaifK 0:e47aa16004e6 367 // function to plot array on display
KaifK 0:e47aa16004e6 368 void N5110::plotArray(float const array[])
KaifK 0:e47aa16004e6 369 {
KaifK 0:e47aa16004e6 370 for (int i=0; i<WIDTH; i++) { // loop through array
KaifK 0:e47aa16004e6 371 // elements are normalised from 0.0 to 1.0, so multiply
KaifK 0:e47aa16004e6 372 // by 47 to convert to pixel range, and subtract from 47
KaifK 0:e47aa16004e6 373 // since top-left is 0,0 in the display geometry
KaifK 0:e47aa16004e6 374 setPixel(i,47 - int(array[i]*47.0f),true);
KaifK 0:e47aa16004e6 375 }
KaifK 0:e47aa16004e6 376
KaifK 0:e47aa16004e6 377 }
KaifK 0:e47aa16004e6 378
KaifK 0:e47aa16004e6 379 // function to draw circle
KaifK 0:e47aa16004e6 380 void N5110:: drawCircle(unsigned int const x0,
KaifK 0:e47aa16004e6 381 unsigned int const y0,
KaifK 0:e47aa16004e6 382 unsigned int const radius,
KaifK 0:e47aa16004e6 383 FillType const fill)
KaifK 0:e47aa16004e6 384 {
KaifK 0:e47aa16004e6 385 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
KaifK 0:e47aa16004e6 386 int x = radius;
KaifK 0:e47aa16004e6 387 int y = 0;
KaifK 0:e47aa16004e6 388 int radiusError = 1-x;
KaifK 0:e47aa16004e6 389
KaifK 0:e47aa16004e6 390 while(x >= y) {
KaifK 0:e47aa16004e6 391
KaifK 0:e47aa16004e6 392 // if transparent, just draw outline
KaifK 0:e47aa16004e6 393 if (fill == FILL_TRANSPARENT) {
KaifK 0:e47aa16004e6 394 setPixel( x + x0, y + y0,true);
KaifK 0:e47aa16004e6 395 setPixel(-x + x0, y + y0,true);
KaifK 0:e47aa16004e6 396 setPixel( y + x0, x + y0,true);
KaifK 0:e47aa16004e6 397 setPixel(-y + x0, x + y0,true);
KaifK 0:e47aa16004e6 398 setPixel(-y + x0, -x + y0,true);
KaifK 0:e47aa16004e6 399 setPixel( y + x0, -x + y0,true);
KaifK 0:e47aa16004e6 400 setPixel( x + x0, -y + y0,true);
KaifK 0:e47aa16004e6 401 setPixel(-x + x0, -y + y0,true);
KaifK 0:e47aa16004e6 402 } else { // drawing filled circle, so draw lines between points at same y value
KaifK 0:e47aa16004e6 403
KaifK 0:e47aa16004e6 404 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
KaifK 0:e47aa16004e6 405
KaifK 0:e47aa16004e6 406 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
KaifK 0:e47aa16004e6 407 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
KaifK 0:e47aa16004e6 408 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
KaifK 0:e47aa16004e6 409 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
KaifK 0:e47aa16004e6 410 }
KaifK 0:e47aa16004e6 411
KaifK 0:e47aa16004e6 412 y++;
KaifK 0:e47aa16004e6 413 if (radiusError<0) {
KaifK 0:e47aa16004e6 414 radiusError += 2 * y + 1;
KaifK 0:e47aa16004e6 415 } else {
KaifK 0:e47aa16004e6 416 x--;
KaifK 0:e47aa16004e6 417 radiusError += 2 * (y - x) + 1;
KaifK 0:e47aa16004e6 418 }
KaifK 0:e47aa16004e6 419 }
KaifK 0:e47aa16004e6 420
KaifK 0:e47aa16004e6 421 }
KaifK 0:e47aa16004e6 422
KaifK 0:e47aa16004e6 423 void N5110::drawLine(unsigned int const x0,
KaifK 0:e47aa16004e6 424 unsigned int const y0,
KaifK 0:e47aa16004e6 425 unsigned int const x1,
KaifK 0:e47aa16004e6 426 unsigned int const y1,
KaifK 0:e47aa16004e6 427 unsigned int const type)
KaifK 0:e47aa16004e6 428 {
KaifK 0:e47aa16004e6 429 // Note that the ranges can be negative so we have to turn the input values
KaifK 0:e47aa16004e6 430 // into signed integers first
KaifK 0:e47aa16004e6 431 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
KaifK 0:e47aa16004e6 432 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
KaifK 0:e47aa16004e6 433
KaifK 0:e47aa16004e6 434 // if dotted line, set step to 2, else step is 1
KaifK 0:e47aa16004e6 435 unsigned int const step = (type==2) ? 2:1;
KaifK 0:e47aa16004e6 436
KaifK 0:e47aa16004e6 437 // make sure we loop over the largest range to get the most pixels on the display
KaifK 0:e47aa16004e6 438 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
KaifK 0:e47aa16004e6 439 // or else we'll only end up with 1 pixel in the x column
KaifK 0:e47aa16004e6 440 if ( abs(x_range) > abs(y_range) ) {
KaifK 0:e47aa16004e6 441
KaifK 0:e47aa16004e6 442 // ensure we loop from smallest to largest or else for-loop won't run as expected
KaifK 0:e47aa16004e6 443 unsigned int const start = x_range > 0 ? x0:x1;
KaifK 0:e47aa16004e6 444 unsigned int const stop = x_range > 0 ? x1:x0;
KaifK 0:e47aa16004e6 445
KaifK 0:e47aa16004e6 446 // loop between x pixels
KaifK 0:e47aa16004e6 447 for (unsigned int x = start; x<= stop ; x+=step) {
KaifK 0:e47aa16004e6 448 // do linear interpolation
KaifK 0:e47aa16004e6 449 int const dx = static_cast<int>(x)-static_cast<int>(x0);
KaifK 0:e47aa16004e6 450 unsigned int const y = y0 + y_range * dx / x_range;
KaifK 0:e47aa16004e6 451
KaifK 0:e47aa16004e6 452 // If the line type is '0', this will clear the pixel
KaifK 0:e47aa16004e6 453 // If it is '1' or '2', the pixel will be set
KaifK 0:e47aa16004e6 454 setPixel(x,y, type);
KaifK 0:e47aa16004e6 455 }
KaifK 0:e47aa16004e6 456 } else {
KaifK 0:e47aa16004e6 457
KaifK 0:e47aa16004e6 458 // ensure we loop from smallest to largest or else for-loop won't run as expected
KaifK 0:e47aa16004e6 459 unsigned int const start = y_range > 0 ? y0:y1;
KaifK 0:e47aa16004e6 460 unsigned int const stop = y_range > 0 ? y1:y0;
KaifK 0:e47aa16004e6 461
KaifK 0:e47aa16004e6 462 for (unsigned int y = start; y<= stop ; y+=step) {
KaifK 0:e47aa16004e6 463 // do linear interpolation
KaifK 0:e47aa16004e6 464 int const dy = static_cast<int>(y)-static_cast<int>(y0);
KaifK 0:e47aa16004e6 465 unsigned int const x = x0 + x_range * dy / y_range;
KaifK 0:e47aa16004e6 466
KaifK 0:e47aa16004e6 467 // If the line type is '0', this will clear the pixel
KaifK 0:e47aa16004e6 468 // If it is '1' or '2', the pixel will be set
KaifK 0:e47aa16004e6 469 setPixel(x,y, type);
KaifK 0:e47aa16004e6 470 }
KaifK 0:e47aa16004e6 471 }
KaifK 0:e47aa16004e6 472
KaifK 0:e47aa16004e6 473 }
KaifK 0:e47aa16004e6 474
KaifK 0:e47aa16004e6 475 void N5110::drawRect(unsigned int const x0,
KaifK 0:e47aa16004e6 476 unsigned int const y0,
KaifK 0:e47aa16004e6 477 unsigned int const width,
KaifK 0:e47aa16004e6 478 unsigned int const height,
KaifK 0:e47aa16004e6 479 FillType const fill)
KaifK 0:e47aa16004e6 480 {
KaifK 0:e47aa16004e6 481 if (fill == FILL_TRANSPARENT) { // transparent, just outline
KaifK 0:e47aa16004e6 482 drawLine(x0,y0,x0+(width-1),y0,1); // top
KaifK 0:e47aa16004e6 483 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
KaifK 0:e47aa16004e6 484 drawLine(x0,y0,x0,y0+(height-1),1); // left
KaifK 0:e47aa16004e6 485 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
KaifK 0:e47aa16004e6 486 } else { // filled rectangle
KaifK 0:e47aa16004e6 487 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
KaifK 0:e47aa16004e6 488 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
KaifK 0:e47aa16004e6 489 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
KaifK 0:e47aa16004e6 490 }
KaifK 0:e47aa16004e6 491 }
KaifK 0:e47aa16004e6 492 }
KaifK 0:e47aa16004e6 493
KaifK 0:e47aa16004e6 494 void N5110::drawSprite(int x0,
KaifK 0:e47aa16004e6 495 int y0,
KaifK 0:e47aa16004e6 496 int nrows,
KaifK 0:e47aa16004e6 497 int ncols,
KaifK 0:e47aa16004e6 498 int *sprite)
KaifK 0:e47aa16004e6 499 {
KaifK 0:e47aa16004e6 500 for (int i = 0; i < nrows; i++) {
KaifK 0:e47aa16004e6 501 for (int j = 0 ; j < ncols ; j++) {
KaifK 0:e47aa16004e6 502
KaifK 0:e47aa16004e6 503 int pixel = *((sprite+i*ncols)+j);
KaifK 0:e47aa16004e6 504 setPixel(x0+j,y0+i, pixel);
KaifK 0:e47aa16004e6 505 }
KaifK 0:e47aa16004e6 506 }
KaifK 0:e47aa16004e6 507 }