Tolu Owoso / Mbed 2 deprecated ELEC2645_Project_el18to

Dependencies:   mbed ELEC2645_Project_el18to

Gamepad2/N5110.cpp@8:37efdea02311, 2020-05-03 (annotated)

Committer:
Tolu__
Date:
Sun May 03 16:15:14 2020 +0000
Revision:
8:37efdea02311
Parent:
1:356eeff7b566 
check commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Tolu__ 1:356eeff7b566 1 #include "mbed.h"
Tolu__ 1:356eeff7b566 2 #include "N5110.h"
Tolu__ 1:356eeff7b566 3
Tolu__ 1:356eeff7b566 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
Tolu__ 1:356eeff7b566 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
Tolu__ 1:356eeff7b566 6 // to power LCD. Doesn't work well with K64F.
Tolu__ 1:356eeff7b566 7 N5110::N5110(PinName const pwrPin,
Tolu__ 1:356eeff7b566 8 PinName const scePin,
Tolu__ 1:356eeff7b566 9 PinName const rstPin,
Tolu__ 1:356eeff7b566 10 PinName const dcPin,
Tolu__ 1:356eeff7b566 11 PinName const mosiPin,
Tolu__ 1:356eeff7b566 12 PinName const sclkPin,
Tolu__ 1:356eeff7b566 13 PinName const ledPin)
Tolu__ 1:356eeff7b566 14 :
Tolu__ 1:356eeff7b566 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
Tolu__ 1:356eeff7b566 16 _led(new DigitalOut(ledPin)),
Tolu__ 1:356eeff7b566 17 _pwr(new DigitalOut(pwrPin)),
Tolu__ 1:356eeff7b566 18 _sce(new DigitalOut(scePin)),
Tolu__ 1:356eeff7b566 19 _rst(new DigitalOut(rstPin)),
Tolu__ 1:356eeff7b566 20 _dc(new DigitalOut(dcPin))
Tolu__ 1:356eeff7b566 21 {}
Tolu__ 1:356eeff7b566 22
Tolu__ 1:356eeff7b566 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
Tolu__ 1:356eeff7b566 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
Tolu__ 1:356eeff7b566 25 // drive the LCD.
Tolu__ 1:356eeff7b566 26 N5110::N5110(PinName const scePin,
Tolu__ 1:356eeff7b566 27 PinName const rstPin,
Tolu__ 1:356eeff7b566 28 PinName const dcPin,
Tolu__ 1:356eeff7b566 29 PinName const mosiPin,
Tolu__ 1:356eeff7b566 30 PinName const sclkPin,
Tolu__ 1:356eeff7b566 31 PinName const ledPin)
Tolu__ 1:356eeff7b566 32 :
Tolu__ 1:356eeff7b566 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
Tolu__ 1:356eeff7b566 34 _led(new DigitalOut(ledPin)),
Tolu__ 1:356eeff7b566 35 _pwr(NULL), // pwr not needed so null it to be safe
Tolu__ 1:356eeff7b566 36 _sce(new DigitalOut(scePin)),
Tolu__ 1:356eeff7b566 37 _rst(new DigitalOut(rstPin)),
Tolu__ 1:356eeff7b566 38 _dc(new DigitalOut(dcPin))
Tolu__ 1:356eeff7b566 39 {}
Tolu__ 1:356eeff7b566 40 // Second overload contructor uses the New Gamepad (Rev 2.1) pin mappings
Tolu__ 1:356eeff7b566 41 N5110::N5110()
Tolu__ 1:356eeff7b566 42 :
Tolu__ 1:356eeff7b566 43 _spi(new SPI(PTD2,NC,PTD1)), // create new SPI instance and initialise
Tolu__ 1:356eeff7b566 44 _led(new DigitalOut(PTB23)),
Tolu__ 1:356eeff7b566 45 _pwr(NULL), // pwr not needed so null it to be safe
Tolu__ 1:356eeff7b566 46 _sce(new DigitalOut(PTB19)),
Tolu__ 1:356eeff7b566 47 _rst(new DigitalOut(PTC1)),
Tolu__ 1:356eeff7b566 48 _dc(new DigitalOut(PTB18))
Tolu__ 1:356eeff7b566 49 {}
Tolu__ 1:356eeff7b566 50
Tolu__ 1:356eeff7b566 51 N5110::~N5110()
Tolu__ 1:356eeff7b566 52 {
Tolu__ 1:356eeff7b566 53 delete _spi;
Tolu__ 1:356eeff7b566 54
Tolu__ 1:356eeff7b566 55 if(_pwr) {
Tolu__ 1:356eeff7b566 56 delete _pwr;
Tolu__ 1:356eeff7b566 57 }
Tolu__ 1:356eeff7b566 58
Tolu__ 1:356eeff7b566 59 delete _led;
Tolu__ 1:356eeff7b566 60 delete _sce;
Tolu__ 1:356eeff7b566 61 delete _rst;
Tolu__ 1:356eeff7b566 62 delete _dc;
Tolu__ 1:356eeff7b566 63 }
Tolu__ 1:356eeff7b566 64
Tolu__ 1:356eeff7b566 65 // initialise function - powers up and sends the initialisation commands
Tolu__ 1:356eeff7b566 66 void N5110::init()
Tolu__ 1:356eeff7b566 67 {
Tolu__ 1:356eeff7b566 68 turnOn(); // power up
Tolu__ 1:356eeff7b566 69 reset(); // reset LCD - must be done within 100 ms
Tolu__ 1:356eeff7b566 70 initSPI();
Tolu__ 1:356eeff7b566 71
Tolu__ 1:356eeff7b566 72 backLightOn();
Tolu__ 1:356eeff7b566 73 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
Tolu__ 1:356eeff7b566 74 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
Tolu__ 1:356eeff7b566 75 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
Tolu__ 1:356eeff7b566 76 normalMode(); // normal video mode by default
Tolu__ 1:356eeff7b566 77
Tolu__ 1:356eeff7b566 78 clearRAM(); // RAM is undefined at power-up so clear to be sure
Tolu__ 1:356eeff7b566 79 clear(); // clear buffer
Tolu__ 1:356eeff7b566 80 }
Tolu__ 1:356eeff7b566 81
Tolu__ 1:356eeff7b566 82 // sets normal video mode (black on white)
Tolu__ 1:356eeff7b566 83 void N5110::normalMode()
Tolu__ 1:356eeff7b566 84 {
Tolu__ 1:356eeff7b566 85 sendCommand(0b00100000); // basic instruction
Tolu__ 1:356eeff7b566 86 sendCommand(0b00001100); // normal video mode- datasheet
Tolu__ 1:356eeff7b566 87 }
Tolu__ 1:356eeff7b566 88
Tolu__ 1:356eeff7b566 89 // sets normal video mode (white on black)
Tolu__ 1:356eeff7b566 90 void N5110::inverseMode()
Tolu__ 1:356eeff7b566 91 {
Tolu__ 1:356eeff7b566 92 sendCommand(0b00100000); // basic instruction
Tolu__ 1:356eeff7b566 93 sendCommand(0b00001101); // inverse video mode - datasheet
Tolu__ 1:356eeff7b566 94 }
Tolu__ 1:356eeff7b566 95
Tolu__ 1:356eeff7b566 96 // function to power up the LCD and backlight - only works when using GPIO to power
Tolu__ 1:356eeff7b566 97 void N5110::turnOn()
Tolu__ 1:356eeff7b566 98 {
Tolu__ 1:356eeff7b566 99 if (_pwr != NULL) {
Tolu__ 1:356eeff7b566 100 _pwr->write(1); // apply power
Tolu__ 1:356eeff7b566 101 }
Tolu__ 1:356eeff7b566 102 }
Tolu__ 1:356eeff7b566 103
Tolu__ 1:356eeff7b566 104 // function to power down LCD
Tolu__ 1:356eeff7b566 105 void N5110::turnOff()
Tolu__ 1:356eeff7b566 106 {
Tolu__ 1:356eeff7b566 107 clear(); // clear buffer
Tolu__ 1:356eeff7b566 108 refresh();
Tolu__ 1:356eeff7b566 109 backLightOff(); // turn backlight off
Tolu__ 1:356eeff7b566 110 clearRAM(); // clear RAM to ensure specified current consumption
Tolu__ 1:356eeff7b566 111 // send command to ensure we are in basic mode
Tolu__ 1:356eeff7b566 112
Tolu__ 1:356eeff7b566 113 sendCommand(0b00100000); // basic mode
Tolu__ 1:356eeff7b566 114 sendCommand(0b00001000); // clear display
Tolu__ 1:356eeff7b566 115 sendCommand(0b00100001); // extended mode
Tolu__ 1:356eeff7b566 116 sendCommand(0b00100100); // power down
Tolu__ 1:356eeff7b566 117
Tolu__ 1:356eeff7b566 118 // if we are powering the LCD using the GPIO then make it low to turn off
Tolu__ 1:356eeff7b566 119 if (_pwr != NULL) {
Tolu__ 1:356eeff7b566 120 wait_ms(10); // small delay and then turn off the power pin
Tolu__ 1:356eeff7b566 121 _pwr->write(0); // turn off power
Tolu__ 1:356eeff7b566 122 }
Tolu__ 1:356eeff7b566 123
Tolu__ 1:356eeff7b566 124 }
Tolu__ 1:356eeff7b566 125
Tolu__ 1:356eeff7b566 126 // function to change LED backlight brightness
Tolu__ 1:356eeff7b566 127 void N5110::backLightOn()
Tolu__ 1:356eeff7b566 128 {
Tolu__ 1:356eeff7b566 129 _led->write(1);
Tolu__ 1:356eeff7b566 130 }
Tolu__ 1:356eeff7b566 131
Tolu__ 1:356eeff7b566 132 // function to change LED backlight brightness
Tolu__ 1:356eeff7b566 133 void N5110::backLightOff()
Tolu__ 1:356eeff7b566 134 {
Tolu__ 1:356eeff7b566 135 _led->write(0);
Tolu__ 1:356eeff7b566 136 }
Tolu__ 1:356eeff7b566 137
Tolu__ 1:356eeff7b566 138 void N5110::setContrast(float contrast) {
Tolu__ 1:356eeff7b566 139
Tolu__ 1:356eeff7b566 140 // enforce limits
Tolu__ 1:356eeff7b566 141 if (contrast > 1.0f)
Tolu__ 1:356eeff7b566 142 contrast = 1.0f;
Tolu__ 1:356eeff7b566 143 else if (contrast < 0.0f)
Tolu__ 1:356eeff7b566 144 contrast = 0.0;
Tolu__ 1:356eeff7b566 145
Tolu__ 1:356eeff7b566 146 // convert to char in range 0 to 127 (i.e. 6 bits)
Tolu__ 1:356eeff7b566 147 char ic = char(contrast*127.0f);
Tolu__ 1:356eeff7b566 148
Tolu__ 1:356eeff7b566 149 sendCommand(0b00100001); // extended instruction set
Tolu__ 1:356eeff7b566 150 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
Tolu__ 1:356eeff7b566 151 sendCommand(0b00100000); // back to basic instruction set
Tolu__ 1:356eeff7b566 152 }
Tolu__ 1:356eeff7b566 153
Tolu__ 1:356eeff7b566 154 void N5110::setTempCoefficient(char tc) {
Tolu__ 1:356eeff7b566 155
Tolu__ 1:356eeff7b566 156 // enforce limits
Tolu__ 1:356eeff7b566 157 if (tc>3) {
Tolu__ 1:356eeff7b566 158 tc=3;
Tolu__ 1:356eeff7b566 159 }
Tolu__ 1:356eeff7b566 160
Tolu__ 1:356eeff7b566 161 // temperature coefficient may need increasing at low temperatures
Tolu__ 1:356eeff7b566 162
Tolu__ 1:356eeff7b566 163 sendCommand(0b00100001); // extended instruction set
Tolu__ 1:356eeff7b566 164 sendCommand(0b00000100 | tc);
Tolu__ 1:356eeff7b566 165 sendCommand(0b00100000); // back to basic instruction set
Tolu__ 1:356eeff7b566 166 }
Tolu__ 1:356eeff7b566 167
Tolu__ 1:356eeff7b566 168 void N5110::setBias(char bias) {
Tolu__ 1:356eeff7b566 169
Tolu__ 1:356eeff7b566 170 // from data sheet
Tolu__ 1:356eeff7b566 171 // bias mux rate
Tolu__ 1:356eeff7b566 172 // 0 1:100
Tolu__ 1:356eeff7b566 173 // 1 1:80
Tolu__ 1:356eeff7b566 174 // 2 1:65
Tolu__ 1:356eeff7b566 175 // 3 1:48 (default)
Tolu__ 1:356eeff7b566 176 // 4 1:40/1:34
Tolu__ 1:356eeff7b566 177 // 5 1:24
Tolu__ 1:356eeff7b566 178 // 6 1:18/1:16
Tolu__ 1:356eeff7b566 179 // 7 1:10/1:9/1:8
Tolu__ 1:356eeff7b566 180
Tolu__ 1:356eeff7b566 181 // enforce limits
Tolu__ 1:356eeff7b566 182 if (bias>7) {
Tolu__ 1:356eeff7b566 183 bias=7;
Tolu__ 1:356eeff7b566 184 }
Tolu__ 1:356eeff7b566 185
Tolu__ 1:356eeff7b566 186 sendCommand(0b00100001); // extended mode instruction
Tolu__ 1:356eeff7b566 187 sendCommand(0b00010000 | bias);
Tolu__ 1:356eeff7b566 188 sendCommand(0b00100000); // end of extended mode instruction
Tolu__ 1:356eeff7b566 189 }
Tolu__ 1:356eeff7b566 190
Tolu__ 1:356eeff7b566 191 // pulse the active low reset line
Tolu__ 1:356eeff7b566 192 void N5110::reset()
Tolu__ 1:356eeff7b566 193 {
Tolu__ 1:356eeff7b566 194 _rst->write(0); // reset the LCD
Tolu__ 1:356eeff7b566 195 _rst->write(1);
Tolu__ 1:356eeff7b566 196 }
Tolu__ 1:356eeff7b566 197
Tolu__ 1:356eeff7b566 198 // function to initialise SPI peripheral
Tolu__ 1:356eeff7b566 199 void N5110::initSPI()
Tolu__ 1:356eeff7b566 200 {
Tolu__ 1:356eeff7b566 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
Tolu__ 1:356eeff7b566 202 _spi->frequency(4000000); // maximum of screen is 4 MHz
Tolu__ 1:356eeff7b566 203 }
Tolu__ 1:356eeff7b566 204
Tolu__ 1:356eeff7b566 205 // send a command to the display
Tolu__ 1:356eeff7b566 206 void N5110::sendCommand(unsigned char command)
Tolu__ 1:356eeff7b566 207 {
Tolu__ 1:356eeff7b566 208 _dc->write(0); // set DC low for command
Tolu__ 1:356eeff7b566 209 _sce->write(0); // set CE low to begin frame
Tolu__ 1:356eeff7b566 210 _spi->write(command); // send command
Tolu__ 1:356eeff7b566 211 _dc->write(1); // turn back to data by default
Tolu__ 1:356eeff7b566 212 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
Tolu__ 1:356eeff7b566 213 }
Tolu__ 1:356eeff7b566 214
Tolu__ 1:356eeff7b566 215 // send data to the display at the current XY address
Tolu__ 1:356eeff7b566 216 // dc is set to 1 (i.e. data) after sending a command and so should
Tolu__ 1:356eeff7b566 217 // be the default mode.
Tolu__ 1:356eeff7b566 218 void N5110::sendData(unsigned char data)
Tolu__ 1:356eeff7b566 219 {
Tolu__ 1:356eeff7b566 220 _sce->write(0); // set CE low to begin frame
Tolu__ 1:356eeff7b566 221 _spi->write(data);
Tolu__ 1:356eeff7b566 222 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
Tolu__ 1:356eeff7b566 223 }
Tolu__ 1:356eeff7b566 224
Tolu__ 1:356eeff7b566 225 // this function writes 0 to the 504 bytes to clear the RAM
Tolu__ 1:356eeff7b566 226 void N5110::clearRAM()
Tolu__ 1:356eeff7b566 227 {
Tolu__ 1:356eeff7b566 228 _sce->write(0); //set CE low to begin frame
Tolu__ 1:356eeff7b566 229 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
Tolu__ 1:356eeff7b566 230 _spi->write(0x00); // send 0's
Tolu__ 1:356eeff7b566 231 }
Tolu__ 1:356eeff7b566 232 _sce->write(1); // set CE high to end frame
Tolu__ 1:356eeff7b566 233 }
Tolu__ 1:356eeff7b566 234
Tolu__ 1:356eeff7b566 235 // function to set the XY address in RAM for subsequenct data write
Tolu__ 1:356eeff7b566 236 void N5110::setXYAddress(unsigned int const x,
Tolu__ 1:356eeff7b566 237 unsigned int const y)
Tolu__ 1:356eeff7b566 238 {
Tolu__ 1:356eeff7b566 239 if (x<WIDTH && y<HEIGHT) { // check within range
Tolu__ 1:356eeff7b566 240 sendCommand(0b00100000); // basic instruction
Tolu__ 1:356eeff7b566 241 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
Tolu__ 1:356eeff7b566 242 sendCommand(0b01000000 | y);
Tolu__ 1:356eeff7b566 243 }
Tolu__ 1:356eeff7b566 244 }
Tolu__ 1:356eeff7b566 245
Tolu__ 1:356eeff7b566 246 // These functions are used to set, clear and get the value of pixels in the display
Tolu__ 1:356eeff7b566 247 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
Tolu__ 1:356eeff7b566 248 // function must be called after set and clear in order to update the display
Tolu__ 1:356eeff7b566 249 void N5110::setPixel(unsigned int const x,
Tolu__ 1:356eeff7b566 250 unsigned int const y,
Tolu__ 1:356eeff7b566 251 bool const state)
Tolu__ 1:356eeff7b566 252 {
Tolu__ 1:356eeff7b566 253 if (x<WIDTH && y<HEIGHT) { // check within range
Tolu__ 1:356eeff7b566 254 // calculate bank and shift 1 to required position in the data byte
Tolu__ 1:356eeff7b566 255 if(state) buffer[x][y/8] |= (1 << y%8);
Tolu__ 1:356eeff7b566 256 else buffer[x][y/8] &= ~(1 << y%8);
Tolu__ 1:356eeff7b566 257 }
Tolu__ 1:356eeff7b566 258 }
Tolu__ 1:356eeff7b566 259
Tolu__ 1:356eeff7b566 260 void N5110::clearPixel(unsigned int const x,
Tolu__ 1:356eeff7b566 261 unsigned int const y)
Tolu__ 1:356eeff7b566 262 {
Tolu__ 1:356eeff7b566 263 if (x<WIDTH && y<HEIGHT) { // check within range
Tolu__ 1:356eeff7b566 264 // calculate bank and shift 1 to required position (using bit clear)
Tolu__ 1:356eeff7b566 265 buffer[x][y/8] &= ~(1 << y%8);
Tolu__ 1:356eeff7b566 266 }
Tolu__ 1:356eeff7b566 267 }
Tolu__ 1:356eeff7b566 268
Tolu__ 1:356eeff7b566 269 int N5110::getPixel(unsigned int const x,
Tolu__ 1:356eeff7b566 270 unsigned int const y) const
Tolu__ 1:356eeff7b566 271 {
Tolu__ 1:356eeff7b566 272 if (x<WIDTH && y<HEIGHT) { // check within range
Tolu__ 1:356eeff7b566 273 // return relevant bank and mask required bit
Tolu__ 1:356eeff7b566 274
Tolu__ 1:356eeff7b566 275 int pixel = (int) buffer[x][y/8] & (1 << y%8);
Tolu__ 1:356eeff7b566 276
Tolu__ 1:356eeff7b566 277 if (pixel)
Tolu__ 1:356eeff7b566 278 return 1;
Tolu__ 1:356eeff7b566 279 else
Tolu__ 1:356eeff7b566 280 return 0;
Tolu__ 1:356eeff7b566 281 }
Tolu__ 1:356eeff7b566 282
Tolu__ 1:356eeff7b566 283 return 0;
Tolu__ 1:356eeff7b566 284
Tolu__ 1:356eeff7b566 285 }
Tolu__ 1:356eeff7b566 286
Tolu__ 1:356eeff7b566 287 // function to refresh the display
Tolu__ 1:356eeff7b566 288 void N5110::refresh()
Tolu__ 1:356eeff7b566 289 {
Tolu__ 1:356eeff7b566 290 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
Tolu__ 1:356eeff7b566 291 // address auto increments after printing string, so buffer[0][0] will not coincide
Tolu__ 1:356eeff7b566 292 // with top-left pixel after priting string
Tolu__ 1:356eeff7b566 293
Tolu__ 1:356eeff7b566 294 _sce->write(0); //set CE low to begin frame
Tolu__ 1:356eeff7b566 295
Tolu__ 1:356eeff7b566 296 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
Tolu__ 1:356eeff7b566 297 for(int i = 0; i < WIDTH; i++) {
Tolu__ 1:356eeff7b566 298 _spi->write(buffer[i][j]); // send buffer
Tolu__ 1:356eeff7b566 299 }
Tolu__ 1:356eeff7b566 300 }
Tolu__ 1:356eeff7b566 301 _sce->write(1); // set CE high to end frame
Tolu__ 1:356eeff7b566 302
Tolu__ 1:356eeff7b566 303 }
Tolu__ 1:356eeff7b566 304
Tolu__ 1:356eeff7b566 305 // fills the buffer with random bytes. Can be used to test the display.
Tolu__ 1:356eeff7b566 306 // The rand() function isn't seeded so it probably creates the same pattern everytime
Tolu__ 1:356eeff7b566 307 void N5110::randomiseBuffer()
Tolu__ 1:356eeff7b566 308 {
Tolu__ 1:356eeff7b566 309 int i,j;
Tolu__ 1:356eeff7b566 310 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
Tolu__ 1:356eeff7b566 311 for(i = 0; i < WIDTH; i++) {
Tolu__ 1:356eeff7b566 312 buffer[i][j] = rand()%256; // generate random byte
Tolu__ 1:356eeff7b566 313 }
Tolu__ 1:356eeff7b566 314 }
Tolu__ 1:356eeff7b566 315
Tolu__ 1:356eeff7b566 316 }
Tolu__ 1:356eeff7b566 317
Tolu__ 1:356eeff7b566 318 // function to print 5x7 font
Tolu__ 1:356eeff7b566 319 void N5110::printChar(char const c,
Tolu__ 1:356eeff7b566 320 unsigned int const x,
Tolu__ 1:356eeff7b566 321 unsigned int const y)
Tolu__ 1:356eeff7b566 322 {
Tolu__ 1:356eeff7b566 323 if (y<BANKS) { // check if printing in range of y banks
Tolu__ 1:356eeff7b566 324
Tolu__ 1:356eeff7b566 325 for (int i = 0; i < 5 ; i++ ) {
Tolu__ 1:356eeff7b566 326 int pixel_x = x+i;
Tolu__ 1:356eeff7b566 327 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
Tolu__ 1:356eeff7b566 328 break;
Tolu__ 1:356eeff7b566 329 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
Tolu__ 1:356eeff7b566 330 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
Tolu__ 1:356eeff7b566 331 }
Tolu__ 1:356eeff7b566 332
Tolu__ 1:356eeff7b566 333 }
Tolu__ 1:356eeff7b566 334 }
Tolu__ 1:356eeff7b566 335
Tolu__ 1:356eeff7b566 336 // function to print string at specified position
Tolu__ 1:356eeff7b566 337 void N5110::printString(const char *str,
Tolu__ 1:356eeff7b566 338 unsigned int const x,
Tolu__ 1:356eeff7b566 339 unsigned int const y)
Tolu__ 1:356eeff7b566 340 {
Tolu__ 1:356eeff7b566 341 if (y<BANKS) { // check if printing in range of y banks
Tolu__ 1:356eeff7b566 342
Tolu__ 1:356eeff7b566 343 int n = 0 ; // counter for number of characters in string
Tolu__ 1:356eeff7b566 344 // loop through string and print character
Tolu__ 1:356eeff7b566 345 while(*str) {
Tolu__ 1:356eeff7b566 346
Tolu__ 1:356eeff7b566 347 // writes the character bitmap data to the buffer, so that
Tolu__ 1:356eeff7b566 348 // text and pixels can be displayed at the same time
Tolu__ 1:356eeff7b566 349 for (int i = 0; i < 5 ; i++ ) {
Tolu__ 1:356eeff7b566 350 int pixel_x = x+i+n*6;
Tolu__ 1:356eeff7b566 351 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
Tolu__ 1:356eeff7b566 352 break;
Tolu__ 1:356eeff7b566 353 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
Tolu__ 1:356eeff7b566 354 }
Tolu__ 1:356eeff7b566 355 str++; // go to next character in string
Tolu__ 1:356eeff7b566 356 n++; // increment index
Tolu__ 1:356eeff7b566 357 }
Tolu__ 1:356eeff7b566 358 }
Tolu__ 1:356eeff7b566 359 }
Tolu__ 1:356eeff7b566 360
Tolu__ 1:356eeff7b566 361 // function to clear the screen buffer
Tolu__ 1:356eeff7b566 362 void N5110::clear()
Tolu__ 1:356eeff7b566 363 {
Tolu__ 1:356eeff7b566 364 memset(buffer,0,sizeof(buffer));
Tolu__ 1:356eeff7b566 365 }
Tolu__ 1:356eeff7b566 366
Tolu__ 1:356eeff7b566 367 // function to plot array on display
Tolu__ 1:356eeff7b566 368 void N5110::plotArray(float const array[])
Tolu__ 1:356eeff7b566 369 {
Tolu__ 1:356eeff7b566 370 for (int i=0; i<WIDTH; i++) { // loop through array
Tolu__ 1:356eeff7b566 371 // elements are normalised from 0.0 to 1.0, so multiply
Tolu__ 1:356eeff7b566 372 // by 47 to convert to pixel range, and subtract from 47
Tolu__ 1:356eeff7b566 373 // since top-left is 0,0 in the display geometry
Tolu__ 1:356eeff7b566 374 setPixel(i,47 - int(array[i]*47.0f),true);
Tolu__ 1:356eeff7b566 375 }
Tolu__ 1:356eeff7b566 376
Tolu__ 1:356eeff7b566 377 }
Tolu__ 1:356eeff7b566 378
Tolu__ 1:356eeff7b566 379 // function to draw circle
Tolu__ 1:356eeff7b566 380 void N5110:: drawCircle(unsigned int const x0,
Tolu__ 1:356eeff7b566 381 unsigned int const y0,
Tolu__ 1:356eeff7b566 382 unsigned int const radius,
Tolu__ 1:356eeff7b566 383 FillType const fill)
Tolu__ 1:356eeff7b566 384 {
Tolu__ 1:356eeff7b566 385 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
Tolu__ 1:356eeff7b566 386 int x = radius;
Tolu__ 1:356eeff7b566 387 int y = 0;
Tolu__ 1:356eeff7b566 388 int radiusError = 1-x;
Tolu__ 1:356eeff7b566 389
Tolu__ 1:356eeff7b566 390 while(x >= y) {
Tolu__ 1:356eeff7b566 391
Tolu__ 1:356eeff7b566 392 // if transparent, just draw outline
Tolu__ 1:356eeff7b566 393 if (fill == FILL_TRANSPARENT) {
Tolu__ 1:356eeff7b566 394 setPixel( x + x0, y + y0,true);
Tolu__ 1:356eeff7b566 395 setPixel(-x + x0, y + y0,true);
Tolu__ 1:356eeff7b566 396 setPixel( y + x0, x + y0,true);
Tolu__ 1:356eeff7b566 397 setPixel(-y + x0, x + y0,true);
Tolu__ 1:356eeff7b566 398 setPixel(-y + x0, -x + y0,true);
Tolu__ 1:356eeff7b566 399 setPixel( y + x0, -x + y0,true);
Tolu__ 1:356eeff7b566 400 setPixel( x + x0, -y + y0,true);
Tolu__ 1:356eeff7b566 401 setPixel(-x + x0, -y + y0,true);
Tolu__ 1:356eeff7b566 402 } else { // drawing filled circle, so draw lines between points at same y value
Tolu__ 1:356eeff7b566 403
Tolu__ 1:356eeff7b566 404 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
Tolu__ 1:356eeff7b566 405
Tolu__ 1:356eeff7b566 406 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
Tolu__ 1:356eeff7b566 407 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
Tolu__ 1:356eeff7b566 408 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
Tolu__ 1:356eeff7b566 409 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
Tolu__ 1:356eeff7b566 410 }
Tolu__ 1:356eeff7b566 411
Tolu__ 1:356eeff7b566 412 y++;
Tolu__ 1:356eeff7b566 413 if (radiusError<0) {
Tolu__ 1:356eeff7b566 414 radiusError += 2 * y + 1;
Tolu__ 1:356eeff7b566 415 } else {
Tolu__ 1:356eeff7b566 416 x--;
Tolu__ 1:356eeff7b566 417 radiusError += 2 * (y - x) + 1;
Tolu__ 1:356eeff7b566 418 }
Tolu__ 1:356eeff7b566 419 }
Tolu__ 1:356eeff7b566 420
Tolu__ 1:356eeff7b566 421 }
Tolu__ 1:356eeff7b566 422
Tolu__ 1:356eeff7b566 423 void N5110::drawLine(unsigned int const x0,
Tolu__ 1:356eeff7b566 424 unsigned int const y0,
Tolu__ 1:356eeff7b566 425 unsigned int const x1,
Tolu__ 1:356eeff7b566 426 unsigned int const y1,
Tolu__ 1:356eeff7b566 427 unsigned int const type)
Tolu__ 1:356eeff7b566 428 {
Tolu__ 1:356eeff7b566 429 // Note that the ranges can be negative so we have to turn the input values
Tolu__ 1:356eeff7b566 430 // into signed integers first
Tolu__ 1:356eeff7b566 431 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
Tolu__ 1:356eeff7b566 432 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
Tolu__ 1:356eeff7b566 433
Tolu__ 1:356eeff7b566 434 // if dotted line, set step to 2, else step is 1
Tolu__ 1:356eeff7b566 435 unsigned int const step = (type==2) ? 2:1;
Tolu__ 1:356eeff7b566 436
Tolu__ 1:356eeff7b566 437 // make sure we loop over the largest range to get the most pixels on the display
Tolu__ 1:356eeff7b566 438 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
Tolu__ 1:356eeff7b566 439 // or else we'll only end up with 1 pixel in the x column
Tolu__ 1:356eeff7b566 440 if ( abs(x_range) > abs(y_range) ) {
Tolu__ 1:356eeff7b566 441
Tolu__ 1:356eeff7b566 442 // ensure we loop from smallest to largest or else for-loop won't run as expected
Tolu__ 1:356eeff7b566 443 unsigned int const start = x_range > 0 ? x0:x1;
Tolu__ 1:356eeff7b566 444 unsigned int const stop = x_range > 0 ? x1:x0;
Tolu__ 1:356eeff7b566 445
Tolu__ 1:356eeff7b566 446 // loop between x pixels
Tolu__ 1:356eeff7b566 447 for (unsigned int x = start; x<= stop ; x+=step) {
Tolu__ 1:356eeff7b566 448 // do linear interpolation
Tolu__ 1:356eeff7b566 449 int const dx = static_cast<int>(x)-static_cast<int>(x0);
Tolu__ 1:356eeff7b566 450 unsigned int const y = y0 + y_range * dx / x_range;
Tolu__ 1:356eeff7b566 451
Tolu__ 1:356eeff7b566 452 // If the line type is '0', this will clear the pixel
Tolu__ 1:356eeff7b566 453 // If it is '1' or '2', the pixel will be set
Tolu__ 1:356eeff7b566 454 setPixel(x,y, type);
Tolu__ 1:356eeff7b566 455 }
Tolu__ 1:356eeff7b566 456 } else {
Tolu__ 1:356eeff7b566 457
Tolu__ 1:356eeff7b566 458 // ensure we loop from smallest to largest or else for-loop won't run as expected
Tolu__ 1:356eeff7b566 459 unsigned int const start = y_range > 0 ? y0:y1;
Tolu__ 1:356eeff7b566 460 unsigned int const stop = y_range > 0 ? y1:y0;
Tolu__ 1:356eeff7b566 461
Tolu__ 1:356eeff7b566 462 for (unsigned int y = start; y<= stop ; y+=step) {
Tolu__ 1:356eeff7b566 463 // do linear interpolation
Tolu__ 1:356eeff7b566 464 int const dy = static_cast<int>(y)-static_cast<int>(y0);
Tolu__ 1:356eeff7b566 465 unsigned int const x = x0 + x_range * dy / y_range;
Tolu__ 1:356eeff7b566 466
Tolu__ 1:356eeff7b566 467 // If the line type is '0', this will clear the pixel
Tolu__ 1:356eeff7b566 468 // If it is '1' or '2', the pixel will be set
Tolu__ 1:356eeff7b566 469 setPixel(x,y, type);
Tolu__ 1:356eeff7b566 470 }
Tolu__ 1:356eeff7b566 471 }
Tolu__ 1:356eeff7b566 472
Tolu__ 1:356eeff7b566 473 }
Tolu__ 1:356eeff7b566 474
Tolu__ 1:356eeff7b566 475 void N5110::drawRect(unsigned int const x0,
Tolu__ 1:356eeff7b566 476 unsigned int const y0,
Tolu__ 1:356eeff7b566 477 unsigned int const width,
Tolu__ 1:356eeff7b566 478 unsigned int const height,
Tolu__ 1:356eeff7b566 479 FillType const fill)
Tolu__ 1:356eeff7b566 480 {
Tolu__ 1:356eeff7b566 481 if (fill == FILL_TRANSPARENT) { // transparent, just outline
Tolu__ 1:356eeff7b566 482 drawLine(x0,y0,x0+(width-1),y0,1); // top
Tolu__ 1:356eeff7b566 483 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
Tolu__ 1:356eeff7b566 484 drawLine(x0,y0,x0,y0+(height-1),1); // left
Tolu__ 1:356eeff7b566 485 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
Tolu__ 1:356eeff7b566 486 } else { // filled rectangle
Tolu__ 1:356eeff7b566 487 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
Tolu__ 1:356eeff7b566 488 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
Tolu__ 1:356eeff7b566 489 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
Tolu__ 1:356eeff7b566 490 }
Tolu__ 1:356eeff7b566 491 }
Tolu__ 1:356eeff7b566 492 }
Tolu__ 1:356eeff7b566 493
Tolu__ 1:356eeff7b566 494 void N5110::drawSprite(int x0,
Tolu__ 1:356eeff7b566 495 int y0,
Tolu__ 1:356eeff7b566 496 int nrows,
Tolu__ 1:356eeff7b566 497 int ncols,
Tolu__ 1:356eeff7b566 498 int *sprite)
Tolu__ 1:356eeff7b566 499 {
Tolu__ 1:356eeff7b566 500 for (int i = 0; i < nrows; i++) {
Tolu__ 1:356eeff7b566 501 for (int j = 0 ; j < ncols ; j++) {
Tolu__ 1:356eeff7b566 502
Tolu__ 1:356eeff7b566 503 int pixel = *((sprite+i*ncols)+j);
Tolu__ 1:356eeff7b566 504 setPixel(x0+j,y0+i, pixel);
Tolu__ 1:356eeff7b566 505 }
Tolu__ 1:356eeff7b566 506 }
Tolu__ 1:356eeff7b566 507 }