Omar Alebiary / Mbed 2 deprecated el17oa

contains my game for the embedded systems project 2645

Dependencies:   mbed FXOS8700CQQQ

N5110/N5110.cpp@40:13b8467526d0, 2019-05-07 (annotated)

Committer:
OmarAlebiary
Date:
Tue May 07 15:17:21 2019 +0000
Revision:
40:13b8467526d0
Parent:
39:822b66b1c935 
Final Submission. I have read and agreed with Statement of Academic Integrity

Who changed what in which revision?

UserRevisionLine numberNew contents of line
OmarAlebiary 39:822b66b1c935 1 #include "mbed.h"
OmarAlebiary 39:822b66b1c935 2 #include "N5110.h"
OmarAlebiary 39:822b66b1c935 3
OmarAlebiary 39:822b66b1c935 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
OmarAlebiary 39:822b66b1c935 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
OmarAlebiary 39:822b66b1c935 6 // to power LCD. Doesn't work well with K64F.
OmarAlebiary 39:822b66b1c935 7 N5110::N5110(PinName const pwrPin,
OmarAlebiary 39:822b66b1c935 8 PinName const scePin,
OmarAlebiary 39:822b66b1c935 9 PinName const rstPin,
OmarAlebiary 39:822b66b1c935 10 PinName const dcPin,
OmarAlebiary 39:822b66b1c935 11 PinName const mosiPin,
OmarAlebiary 39:822b66b1c935 12 PinName const sclkPin,
OmarAlebiary 39:822b66b1c935 13 PinName const ledPin)
OmarAlebiary 39:822b66b1c935 14 :
OmarAlebiary 39:822b66b1c935 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
OmarAlebiary 39:822b66b1c935 16 _led(new PwmOut(ledPin)),
OmarAlebiary 39:822b66b1c935 17 _pwr(new DigitalOut(pwrPin)),
OmarAlebiary 39:822b66b1c935 18 _sce(new DigitalOut(scePin)),
OmarAlebiary 39:822b66b1c935 19 _rst(new DigitalOut(rstPin)),
OmarAlebiary 39:822b66b1c935 20 _dc(new DigitalOut(dcPin))
OmarAlebiary 39:822b66b1c935 21 {}
OmarAlebiary 39:822b66b1c935 22
OmarAlebiary 39:822b66b1c935 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
OmarAlebiary 39:822b66b1c935 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
OmarAlebiary 39:822b66b1c935 25 // drive the LCD.
OmarAlebiary 39:822b66b1c935 26 N5110::N5110(PinName const scePin,
OmarAlebiary 39:822b66b1c935 27 PinName const rstPin,
OmarAlebiary 39:822b66b1c935 28 PinName const dcPin,
OmarAlebiary 39:822b66b1c935 29 PinName const mosiPin,
OmarAlebiary 39:822b66b1c935 30 PinName const sclkPin,
OmarAlebiary 39:822b66b1c935 31 PinName const ledPin)
OmarAlebiary 39:822b66b1c935 32 :
OmarAlebiary 39:822b66b1c935 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
OmarAlebiary 39:822b66b1c935 34 _led(new PwmOut(ledPin)),
OmarAlebiary 39:822b66b1c935 35 _pwr(NULL), // pwr not needed so null it to be safe
OmarAlebiary 39:822b66b1c935 36 _sce(new DigitalOut(scePin)),
OmarAlebiary 39:822b66b1c935 37 _rst(new DigitalOut(rstPin)),
OmarAlebiary 39:822b66b1c935 38 _dc(new DigitalOut(dcPin))
OmarAlebiary 39:822b66b1c935 39 {}
OmarAlebiary 39:822b66b1c935 40
OmarAlebiary 39:822b66b1c935 41 N5110::~N5110()
OmarAlebiary 39:822b66b1c935 42 {
OmarAlebiary 39:822b66b1c935 43 delete _spi;
OmarAlebiary 39:822b66b1c935 44
OmarAlebiary 39:822b66b1c935 45 if(_pwr) {
OmarAlebiary 39:822b66b1c935 46 delete _pwr;
OmarAlebiary 39:822b66b1c935 47 }
OmarAlebiary 39:822b66b1c935 48
OmarAlebiary 39:822b66b1c935 49 delete _led;
OmarAlebiary 39:822b66b1c935 50 delete _sce;
OmarAlebiary 39:822b66b1c935 51 delete _rst;
OmarAlebiary 39:822b66b1c935 52 delete _dc;
OmarAlebiary 39:822b66b1c935 53 }
OmarAlebiary 39:822b66b1c935 54
OmarAlebiary 39:822b66b1c935 55 // initialise function - powers up and sends the initialisation commands
OmarAlebiary 39:822b66b1c935 56 void N5110::init()
OmarAlebiary 39:822b66b1c935 57 {
OmarAlebiary 39:822b66b1c935 58 turnOn(); // power up
OmarAlebiary 39:822b66b1c935 59 reset(); // reset LCD - must be done within 100 ms
OmarAlebiary 39:822b66b1c935 60 initSPI();
OmarAlebiary 39:822b66b1c935 61
OmarAlebiary 39:822b66b1c935 62 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
OmarAlebiary 39:822b66b1c935 63 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
OmarAlebiary 39:822b66b1c935 64 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
OmarAlebiary 39:822b66b1c935 65 normalMode(); // normal video mode by default
OmarAlebiary 39:822b66b1c935 66
OmarAlebiary 39:822b66b1c935 67 clearRAM(); // RAM is undefined at power-up so clear to be sure
OmarAlebiary 39:822b66b1c935 68 clear(); // clear buffer
OmarAlebiary 39:822b66b1c935 69 setBrightness(0.5);
OmarAlebiary 39:822b66b1c935 70 }
OmarAlebiary 39:822b66b1c935 71
OmarAlebiary 39:822b66b1c935 72 // sets normal video mode (black on white)
OmarAlebiary 39:822b66b1c935 73 void N5110::normalMode()
OmarAlebiary 39:822b66b1c935 74 {
OmarAlebiary 39:822b66b1c935 75 sendCommand(0b00100000); // basic instruction
OmarAlebiary 39:822b66b1c935 76 sendCommand(0b00001100); // normal video mode- datasheet
OmarAlebiary 39:822b66b1c935 77 }
OmarAlebiary 39:822b66b1c935 78
OmarAlebiary 39:822b66b1c935 79 // sets normal video mode (white on black)
OmarAlebiary 39:822b66b1c935 80 void N5110::inverseMode()
OmarAlebiary 39:822b66b1c935 81 {
OmarAlebiary 39:822b66b1c935 82 sendCommand(0b00100000); // basic instruction
OmarAlebiary 39:822b66b1c935 83 sendCommand(0b00001101); // inverse video mode - datasheet
OmarAlebiary 39:822b66b1c935 84 }
OmarAlebiary 39:822b66b1c935 85
OmarAlebiary 39:822b66b1c935 86 // function to power up the LCD and backlight - only works when using GPIO to power
OmarAlebiary 39:822b66b1c935 87 void N5110::turnOn()
OmarAlebiary 39:822b66b1c935 88 {
OmarAlebiary 39:822b66b1c935 89 if (_pwr != NULL) {
OmarAlebiary 39:822b66b1c935 90 _pwr->write(1); // apply power
OmarAlebiary 39:822b66b1c935 91 }
OmarAlebiary 39:822b66b1c935 92 }
OmarAlebiary 39:822b66b1c935 93
OmarAlebiary 39:822b66b1c935 94 // function to power down LCD
OmarAlebiary 39:822b66b1c935 95 void N5110::turnOff()
OmarAlebiary 39:822b66b1c935 96 {
OmarAlebiary 39:822b66b1c935 97 clear(); // clear buffer
OmarAlebiary 39:822b66b1c935 98 refresh();
OmarAlebiary 39:822b66b1c935 99 setBrightness(0.0); // turn backlight off
OmarAlebiary 39:822b66b1c935 100 clearRAM(); // clear RAM to ensure specified current consumption
OmarAlebiary 39:822b66b1c935 101 // send command to ensure we are in basic mode
OmarAlebiary 39:822b66b1c935 102
OmarAlebiary 39:822b66b1c935 103 sendCommand(0b00100000); // basic mode
OmarAlebiary 39:822b66b1c935 104 sendCommand(0b00001000); // clear display
OmarAlebiary 39:822b66b1c935 105 sendCommand(0b00100001); // extended mode
OmarAlebiary 39:822b66b1c935 106 sendCommand(0b00100100); // power down
OmarAlebiary 39:822b66b1c935 107
OmarAlebiary 39:822b66b1c935 108 // if we are powering the LCD using the GPIO then make it low to turn off
OmarAlebiary 39:822b66b1c935 109 if (_pwr != NULL) {
OmarAlebiary 39:822b66b1c935 110 wait_ms(10); // small delay and then turn off the power pin
OmarAlebiary 39:822b66b1c935 111 _pwr->write(0); // turn off power
OmarAlebiary 39:822b66b1c935 112 }
OmarAlebiary 39:822b66b1c935 113
OmarAlebiary 39:822b66b1c935 114 }
OmarAlebiary 39:822b66b1c935 115
OmarAlebiary 39:822b66b1c935 116 // function to change LED backlight brightness
OmarAlebiary 39:822b66b1c935 117 void N5110::setBrightness(float brightness)
OmarAlebiary 39:822b66b1c935 118 {
OmarAlebiary 39:822b66b1c935 119 // check whether brightness is within range
OmarAlebiary 39:822b66b1c935 120 if (brightness < 0.0f)
OmarAlebiary 39:822b66b1c935 121 brightness = 0.0f;
OmarAlebiary 39:822b66b1c935 122 if (brightness > 1.0f)
OmarAlebiary 39:822b66b1c935 123 brightness = 1.0f;
OmarAlebiary 39:822b66b1c935 124 // set PWM duty cycle
OmarAlebiary 39:822b66b1c935 125 _led->write(brightness);
OmarAlebiary 39:822b66b1c935 126 }
OmarAlebiary 39:822b66b1c935 127
OmarAlebiary 39:822b66b1c935 128 void N5110::setContrast(float contrast) {
OmarAlebiary 39:822b66b1c935 129
OmarAlebiary 39:822b66b1c935 130 // enforce limits
OmarAlebiary 39:822b66b1c935 131 if (contrast > 1.0f)
OmarAlebiary 39:822b66b1c935 132 contrast = 1.0f;
OmarAlebiary 39:822b66b1c935 133 else if (contrast < 0.0f)
OmarAlebiary 39:822b66b1c935 134 contrast = 0.0;
OmarAlebiary 39:822b66b1c935 135
OmarAlebiary 39:822b66b1c935 136 // convert to char in range 0 to 127 (i.e. 6 bits)
OmarAlebiary 39:822b66b1c935 137 char ic = char(contrast*127.0f);
OmarAlebiary 39:822b66b1c935 138
OmarAlebiary 39:822b66b1c935 139 sendCommand(0b00100001); // extended instruction set
OmarAlebiary 39:822b66b1c935 140 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
OmarAlebiary 39:822b66b1c935 141 sendCommand(0b00100000); // back to basic instruction set
OmarAlebiary 39:822b66b1c935 142 }
OmarAlebiary 39:822b66b1c935 143
OmarAlebiary 39:822b66b1c935 144 void N5110::setTempCoefficient(char tc) {
OmarAlebiary 39:822b66b1c935 145
OmarAlebiary 39:822b66b1c935 146 // enforce limits
OmarAlebiary 39:822b66b1c935 147 if (tc>3) {
OmarAlebiary 39:822b66b1c935 148 tc=3;
OmarAlebiary 39:822b66b1c935 149 }
OmarAlebiary 39:822b66b1c935 150
OmarAlebiary 39:822b66b1c935 151 // temperature coefficient may need increasing at low temperatures
OmarAlebiary 39:822b66b1c935 152
OmarAlebiary 39:822b66b1c935 153 sendCommand(0b00100001); // extended instruction set
OmarAlebiary 39:822b66b1c935 154 sendCommand(0b00000100 | tc);
OmarAlebiary 39:822b66b1c935 155 sendCommand(0b00100000); // back to basic instruction set
OmarAlebiary 39:822b66b1c935 156 }
OmarAlebiary 39:822b66b1c935 157
OmarAlebiary 39:822b66b1c935 158 void N5110::setBias(char bias) {
OmarAlebiary 39:822b66b1c935 159
OmarAlebiary 39:822b66b1c935 160 // from data sheet
OmarAlebiary 39:822b66b1c935 161 // bias mux rate
OmarAlebiary 39:822b66b1c935 162 // 0 1:100
OmarAlebiary 39:822b66b1c935 163 // 1 1:80
OmarAlebiary 39:822b66b1c935 164 // 2 1:65
OmarAlebiary 39:822b66b1c935 165 // 3 1:48 (default)
OmarAlebiary 39:822b66b1c935 166 // 4 1:40/1:34
OmarAlebiary 39:822b66b1c935 167 // 5 1:24
OmarAlebiary 39:822b66b1c935 168 // 6 1:18/1:16
OmarAlebiary 39:822b66b1c935 169 // 7 1:10/1:9/1:8
OmarAlebiary 39:822b66b1c935 170
OmarAlebiary 39:822b66b1c935 171 // enforce limits
OmarAlebiary 39:822b66b1c935 172 if (bias>7) {
OmarAlebiary 39:822b66b1c935 173 bias=7;
OmarAlebiary 39:822b66b1c935 174 }
OmarAlebiary 39:822b66b1c935 175
OmarAlebiary 39:822b66b1c935 176 sendCommand(0b00100001); // extended mode instruction
OmarAlebiary 39:822b66b1c935 177 sendCommand(0b00010000 | bias);
OmarAlebiary 39:822b66b1c935 178 sendCommand(0b00100000); // end of extended mode instruction
OmarAlebiary 39:822b66b1c935 179 }
OmarAlebiary 39:822b66b1c935 180
OmarAlebiary 39:822b66b1c935 181 // pulse the active low reset line
OmarAlebiary 39:822b66b1c935 182 void N5110::reset()
OmarAlebiary 39:822b66b1c935 183 {
OmarAlebiary 39:822b66b1c935 184 _rst->write(0); // reset the LCD
OmarAlebiary 39:822b66b1c935 185 _rst->write(1);
OmarAlebiary 39:822b66b1c935 186 }
OmarAlebiary 39:822b66b1c935 187
OmarAlebiary 39:822b66b1c935 188 // function to initialise SPI peripheral
OmarAlebiary 39:822b66b1c935 189 void N5110::initSPI()
OmarAlebiary 39:822b66b1c935 190 {
OmarAlebiary 39:822b66b1c935 191 _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
OmarAlebiary 39:822b66b1c935 192 _spi->frequency(4000000); // maximum of screen is 4 MHz
OmarAlebiary 39:822b66b1c935 193 }
OmarAlebiary 39:822b66b1c935 194
OmarAlebiary 39:822b66b1c935 195 // send a command to the display
OmarAlebiary 39:822b66b1c935 196 void N5110::sendCommand(unsigned char command)
OmarAlebiary 39:822b66b1c935 197 {
OmarAlebiary 39:822b66b1c935 198 _dc->write(0); // set DC low for command
OmarAlebiary 39:822b66b1c935 199 _sce->write(0); // set CE low to begin frame
OmarAlebiary 39:822b66b1c935 200 _spi->write(command); // send command
OmarAlebiary 39:822b66b1c935 201 _dc->write(1); // turn back to data by default
OmarAlebiary 39:822b66b1c935 202 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
OmarAlebiary 39:822b66b1c935 203 }
OmarAlebiary 39:822b66b1c935 204
OmarAlebiary 39:822b66b1c935 205 // send data to the display at the current XY address
OmarAlebiary 39:822b66b1c935 206 // dc is set to 1 (i.e. data) after sending a command and so should
OmarAlebiary 39:822b66b1c935 207 // be the default mode.
OmarAlebiary 39:822b66b1c935 208 void N5110::sendData(unsigned char data)
OmarAlebiary 39:822b66b1c935 209 {
OmarAlebiary 39:822b66b1c935 210 _sce->write(0); // set CE low to begin frame
OmarAlebiary 39:822b66b1c935 211 _spi->write(data);
OmarAlebiary 39:822b66b1c935 212 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
OmarAlebiary 39:822b66b1c935 213 }
OmarAlebiary 39:822b66b1c935 214
OmarAlebiary 39:822b66b1c935 215 // this function writes 0 to the 504 bytes to clear the RAM
OmarAlebiary 39:822b66b1c935 216 void N5110::clearRAM()
OmarAlebiary 39:822b66b1c935 217 {
OmarAlebiary 39:822b66b1c935 218 _sce->write(0); //set CE low to begin frame
OmarAlebiary 39:822b66b1c935 219 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
OmarAlebiary 39:822b66b1c935 220 _spi->write(0x00); // send 0's
OmarAlebiary 39:822b66b1c935 221 }
OmarAlebiary 39:822b66b1c935 222 _sce->write(1); // set CE high to end frame
OmarAlebiary 39:822b66b1c935 223 }
OmarAlebiary 39:822b66b1c935 224
OmarAlebiary 39:822b66b1c935 225 // function to set the XY address in RAM for subsequenct data write
OmarAlebiary 39:822b66b1c935 226 void N5110::setXYAddress(unsigned int const x,
OmarAlebiary 39:822b66b1c935 227 unsigned int const y)
OmarAlebiary 39:822b66b1c935 228 {
OmarAlebiary 39:822b66b1c935 229 if (x<WIDTH && y<HEIGHT) { // check within range
OmarAlebiary 39:822b66b1c935 230 sendCommand(0b00100000); // basic instruction
OmarAlebiary 39:822b66b1c935 231 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
OmarAlebiary 39:822b66b1c935 232 sendCommand(0b01000000 | y);
OmarAlebiary 39:822b66b1c935 233 }
OmarAlebiary 39:822b66b1c935 234 }
OmarAlebiary 39:822b66b1c935 235
OmarAlebiary 39:822b66b1c935 236 // These functions are used to set, clear and get the value of pixels in the display
OmarAlebiary 39:822b66b1c935 237 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
OmarAlebiary 39:822b66b1c935 238 // function must be called after set and clear in order to update the display
OmarAlebiary 39:822b66b1c935 239 void N5110::setPixel(unsigned int const x,
OmarAlebiary 39:822b66b1c935 240 unsigned int const y,
OmarAlebiary 39:822b66b1c935 241 bool const state)
OmarAlebiary 39:822b66b1c935 242 {
OmarAlebiary 39:822b66b1c935 243 if (x<WIDTH && y<HEIGHT) { // check within range
OmarAlebiary 39:822b66b1c935 244 // calculate bank and shift 1 to required position in the data byte
OmarAlebiary 39:822b66b1c935 245 if(state) buffer[x][y/8] |= (1 << y%8);
OmarAlebiary 39:822b66b1c935 246 else buffer[x][y/8] &= ~(1 << y%8);
OmarAlebiary 39:822b66b1c935 247 }
OmarAlebiary 39:822b66b1c935 248 }
OmarAlebiary 39:822b66b1c935 249
OmarAlebiary 39:822b66b1c935 250 void N5110::clearPixel(unsigned int const x,
OmarAlebiary 39:822b66b1c935 251 unsigned int const y)
OmarAlebiary 39:822b66b1c935 252 {
OmarAlebiary 39:822b66b1c935 253 if (x<WIDTH && y<HEIGHT) { // check within range
OmarAlebiary 39:822b66b1c935 254 // calculate bank and shift 1 to required position (using bit clear)
OmarAlebiary 39:822b66b1c935 255 buffer[x][y/8] &= ~(1 << y%8);
OmarAlebiary 39:822b66b1c935 256 }
OmarAlebiary 39:822b66b1c935 257 }
OmarAlebiary 39:822b66b1c935 258
OmarAlebiary 39:822b66b1c935 259 int N5110::getPixel(unsigned int const x,
OmarAlebiary 39:822b66b1c935 260 unsigned int const y) const
OmarAlebiary 39:822b66b1c935 261 {
OmarAlebiary 39:822b66b1c935 262 if (x<WIDTH && y<HEIGHT) { // check within range
OmarAlebiary 39:822b66b1c935 263 // return relevant bank and mask required bit
OmarAlebiary 39:822b66b1c935 264
OmarAlebiary 39:822b66b1c935 265 int pixel = (int) buffer[x][y/8] & (1 << y%8);
OmarAlebiary 39:822b66b1c935 266
OmarAlebiary 39:822b66b1c935 267 if (pixel)
OmarAlebiary 39:822b66b1c935 268 return 1;
OmarAlebiary 39:822b66b1c935 269 else
OmarAlebiary 39:822b66b1c935 270 return 0;
OmarAlebiary 39:822b66b1c935 271 }
OmarAlebiary 39:822b66b1c935 272
OmarAlebiary 39:822b66b1c935 273 return 0;
OmarAlebiary 39:822b66b1c935 274
OmarAlebiary 39:822b66b1c935 275 }
OmarAlebiary 39:822b66b1c935 276
OmarAlebiary 39:822b66b1c935 277 // function to refresh the display
OmarAlebiary 39:822b66b1c935 278 void N5110::refresh()
OmarAlebiary 39:822b66b1c935 279 {
OmarAlebiary 39:822b66b1c935 280 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
OmarAlebiary 39:822b66b1c935 281 // address auto increments after printing string, so buffer[0][0] will not coincide
OmarAlebiary 39:822b66b1c935 282 // with top-left pixel after priting string
OmarAlebiary 39:822b66b1c935 283
OmarAlebiary 39:822b66b1c935 284 _sce->write(0); //set CE low to begin frame
OmarAlebiary 39:822b66b1c935 285
OmarAlebiary 39:822b66b1c935 286 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
OmarAlebiary 39:822b66b1c935 287 for(int i = 0; i < WIDTH; i++) {
OmarAlebiary 39:822b66b1c935 288 _spi->write(buffer[i][j]); // send buffer
OmarAlebiary 39:822b66b1c935 289 }
OmarAlebiary 39:822b66b1c935 290 }
OmarAlebiary 39:822b66b1c935 291 _sce->write(1); // set CE high to end frame
OmarAlebiary 39:822b66b1c935 292
OmarAlebiary 39:822b66b1c935 293 }
OmarAlebiary 39:822b66b1c935 294
OmarAlebiary 39:822b66b1c935 295 // fills the buffer with random bytes. Can be used to test the display.
OmarAlebiary 39:822b66b1c935 296 // The rand() function isn't seeded so it probably creates the same pattern everytime
OmarAlebiary 39:822b66b1c935 297 void N5110::randomiseBuffer()
OmarAlebiary 39:822b66b1c935 298 {
OmarAlebiary 39:822b66b1c935 299 int i,j;
OmarAlebiary 39:822b66b1c935 300 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
OmarAlebiary 39:822b66b1c935 301 for(i = 0; i < WIDTH; i++) {
OmarAlebiary 39:822b66b1c935 302 buffer[i][j] = rand()%256; // generate random byte
OmarAlebiary 39:822b66b1c935 303 }
OmarAlebiary 39:822b66b1c935 304 }
OmarAlebiary 39:822b66b1c935 305
OmarAlebiary 39:822b66b1c935 306 }
OmarAlebiary 39:822b66b1c935 307
OmarAlebiary 39:822b66b1c935 308 // function to print 5x7 font
OmarAlebiary 39:822b66b1c935 309 void N5110::printChar(char const c,
OmarAlebiary 39:822b66b1c935 310 unsigned int const x,
OmarAlebiary 39:822b66b1c935 311 unsigned int const y)
OmarAlebiary 39:822b66b1c935 312 {
OmarAlebiary 39:822b66b1c935 313 if (y<BANKS) { // check if printing in range of y banks
OmarAlebiary 39:822b66b1c935 314
OmarAlebiary 39:822b66b1c935 315 for (int i = 0; i < 5 ; i++ ) {
OmarAlebiary 39:822b66b1c935 316 int pixel_x = x+i;
OmarAlebiary 39:822b66b1c935 317 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
OmarAlebiary 39:822b66b1c935 318 break;
OmarAlebiary 39:822b66b1c935 319 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
OmarAlebiary 39:822b66b1c935 320 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
OmarAlebiary 39:822b66b1c935 321 }
OmarAlebiary 39:822b66b1c935 322
OmarAlebiary 39:822b66b1c935 323 }
OmarAlebiary 39:822b66b1c935 324 }
OmarAlebiary 39:822b66b1c935 325
OmarAlebiary 39:822b66b1c935 326 // function to print string at specified position
OmarAlebiary 39:822b66b1c935 327 void N5110::printString(const char *str,
OmarAlebiary 39:822b66b1c935 328 unsigned int const x,
OmarAlebiary 39:822b66b1c935 329 unsigned int const y)
OmarAlebiary 39:822b66b1c935 330 {
OmarAlebiary 39:822b66b1c935 331 if (y<BANKS) { // check if printing in range of y banks
OmarAlebiary 39:822b66b1c935 332
OmarAlebiary 39:822b66b1c935 333 int n = 0 ; // counter for number of characters in string
OmarAlebiary 39:822b66b1c935 334 // loop through string and print character
OmarAlebiary 39:822b66b1c935 335 while(*str) {
OmarAlebiary 39:822b66b1c935 336
OmarAlebiary 39:822b66b1c935 337 // writes the character bitmap data to the buffer, so that
OmarAlebiary 39:822b66b1c935 338 // text and pixels can be displayed at the same time
OmarAlebiary 39:822b66b1c935 339 for (int i = 0; i < 5 ; i++ ) {
OmarAlebiary 39:822b66b1c935 340 int pixel_x = x+i+n*6;
OmarAlebiary 39:822b66b1c935 341 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
OmarAlebiary 39:822b66b1c935 342 break;
OmarAlebiary 39:822b66b1c935 343 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
OmarAlebiary 39:822b66b1c935 344 }
OmarAlebiary 39:822b66b1c935 345 str++; // go to next character in string
OmarAlebiary 39:822b66b1c935 346 n++; // increment index
OmarAlebiary 39:822b66b1c935 347 }
OmarAlebiary 39:822b66b1c935 348 }
OmarAlebiary 39:822b66b1c935 349 }
OmarAlebiary 39:822b66b1c935 350
OmarAlebiary 39:822b66b1c935 351 // function to clear the screen buffer
OmarAlebiary 39:822b66b1c935 352 void N5110::clear()
OmarAlebiary 39:822b66b1c935 353 {
OmarAlebiary 39:822b66b1c935 354 memset(buffer,0,sizeof(buffer));
OmarAlebiary 39:822b66b1c935 355 }
OmarAlebiary 39:822b66b1c935 356
OmarAlebiary 39:822b66b1c935 357 // function to plot array on display
OmarAlebiary 39:822b66b1c935 358 void N5110::plotArray(float const array[])
OmarAlebiary 39:822b66b1c935 359 {
OmarAlebiary 39:822b66b1c935 360 for (int i=0; i<WIDTH; i++) { // loop through array
OmarAlebiary 39:822b66b1c935 361 // elements are normalised from 0.0 to 1.0, so multiply
OmarAlebiary 39:822b66b1c935 362 // by 47 to convert to pixel range, and subtract from 47
OmarAlebiary 39:822b66b1c935 363 // since top-left is 0,0 in the display geometry
OmarAlebiary 39:822b66b1c935 364 setPixel(i,47 - int(array[i]*47.0f),true);
OmarAlebiary 39:822b66b1c935 365 }
OmarAlebiary 39:822b66b1c935 366
OmarAlebiary 39:822b66b1c935 367 }
OmarAlebiary 39:822b66b1c935 368
OmarAlebiary 39:822b66b1c935 369 // function to draw circle
OmarAlebiary 39:822b66b1c935 370 void N5110:: drawCircle(unsigned int const x0,
OmarAlebiary 39:822b66b1c935 371 unsigned int const y0,
OmarAlebiary 39:822b66b1c935 372 unsigned int const radius,
OmarAlebiary 39:822b66b1c935 373 FillType const fill)
OmarAlebiary 39:822b66b1c935 374 {
OmarAlebiary 39:822b66b1c935 375 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
OmarAlebiary 39:822b66b1c935 376 int x = radius;
OmarAlebiary 39:822b66b1c935 377 int y = 0;
OmarAlebiary 39:822b66b1c935 378 int radiusError = 1-x;
OmarAlebiary 39:822b66b1c935 379
OmarAlebiary 39:822b66b1c935 380 while(x >= y) {
OmarAlebiary 39:822b66b1c935 381
OmarAlebiary 39:822b66b1c935 382 // if transparent, just draw outline
OmarAlebiary 39:822b66b1c935 383 if (fill == FILL_TRANSPARENT) {
OmarAlebiary 39:822b66b1c935 384 setPixel( x + x0, y + y0,true);
OmarAlebiary 39:822b66b1c935 385 setPixel(-x + x0, y + y0,true);
OmarAlebiary 39:822b66b1c935 386 setPixel( y + x0, x + y0,true);
OmarAlebiary 39:822b66b1c935 387 setPixel(-y + x0, x + y0,true);
OmarAlebiary 39:822b66b1c935 388 setPixel(-y + x0, -x + y0,true);
OmarAlebiary 39:822b66b1c935 389 setPixel( y + x0, -x + y0,true);
OmarAlebiary 39:822b66b1c935 390 setPixel( x + x0, -y + y0,true);
OmarAlebiary 39:822b66b1c935 391 setPixel(-x + x0, -y + y0,true);
OmarAlebiary 39:822b66b1c935 392 } else { // drawing filled circle, so draw lines between points at same y value
OmarAlebiary 39:822b66b1c935 393
OmarAlebiary 39:822b66b1c935 394 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
OmarAlebiary 39:822b66b1c935 395
OmarAlebiary 39:822b66b1c935 396 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
OmarAlebiary 39:822b66b1c935 397 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
OmarAlebiary 39:822b66b1c935 398 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
OmarAlebiary 39:822b66b1c935 399 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
OmarAlebiary 39:822b66b1c935 400 }
OmarAlebiary 39:822b66b1c935 401
OmarAlebiary 39:822b66b1c935 402 y++;
OmarAlebiary 39:822b66b1c935 403 if (radiusError<0) {
OmarAlebiary 39:822b66b1c935 404 radiusError += 2 * y + 1;
OmarAlebiary 39:822b66b1c935 405 } else {
OmarAlebiary 39:822b66b1c935 406 x--;
OmarAlebiary 39:822b66b1c935 407 radiusError += 2 * (y - x) + 1;
OmarAlebiary 39:822b66b1c935 408 }
OmarAlebiary 39:822b66b1c935 409 }
OmarAlebiary 39:822b66b1c935 410
OmarAlebiary 39:822b66b1c935 411 }
OmarAlebiary 39:822b66b1c935 412
OmarAlebiary 39:822b66b1c935 413 void N5110::drawLine(unsigned int const x0,
OmarAlebiary 39:822b66b1c935 414 unsigned int const y0,
OmarAlebiary 39:822b66b1c935 415 unsigned int const x1,
OmarAlebiary 39:822b66b1c935 416 unsigned int const y1,
OmarAlebiary 39:822b66b1c935 417 unsigned int const type)
OmarAlebiary 39:822b66b1c935 418 {
OmarAlebiary 39:822b66b1c935 419 // Note that the ranges can be negative so we have to turn the input values
OmarAlebiary 39:822b66b1c935 420 // into signed integers first
OmarAlebiary 39:822b66b1c935 421 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
OmarAlebiary 39:822b66b1c935 422 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
OmarAlebiary 39:822b66b1c935 423
OmarAlebiary 39:822b66b1c935 424 // if dotted line, set step to 2, else step is 1
OmarAlebiary 39:822b66b1c935 425 unsigned int const step = (type==2) ? 2:1;
OmarAlebiary 39:822b66b1c935 426
OmarAlebiary 39:822b66b1c935 427 // make sure we loop over the largest range to get the most pixels on the display
OmarAlebiary 39:822b66b1c935 428 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
OmarAlebiary 39:822b66b1c935 429 // or else we'll only end up with 1 pixel in the x column
OmarAlebiary 39:822b66b1c935 430 if ( abs(x_range) > abs(y_range) ) {
OmarAlebiary 39:822b66b1c935 431
OmarAlebiary 39:822b66b1c935 432 // ensure we loop from smallest to largest or else for-loop won't run as expected
OmarAlebiary 39:822b66b1c935 433 unsigned int const start = x_range > 0 ? x0:x1;
OmarAlebiary 39:822b66b1c935 434 unsigned int const stop = x_range > 0 ? x1:x0;
OmarAlebiary 39:822b66b1c935 435
OmarAlebiary 39:822b66b1c935 436 // loop between x pixels
OmarAlebiary 39:822b66b1c935 437 for (unsigned int x = start; x<= stop ; x+=step) {
OmarAlebiary 39:822b66b1c935 438 // do linear interpolation
OmarAlebiary 39:822b66b1c935 439 int const dx = static_cast<int>(x)-static_cast<int>(x0);
OmarAlebiary 39:822b66b1c935 440 unsigned int const y = y0 + y_range * dx / x_range;
OmarAlebiary 39:822b66b1c935 441
OmarAlebiary 39:822b66b1c935 442 // If the line type is '0', this will clear the pixel
OmarAlebiary 39:822b66b1c935 443 // If it is '1' or '2', the pixel will be set
OmarAlebiary 39:822b66b1c935 444 setPixel(x,y, type);
OmarAlebiary 39:822b66b1c935 445 }
OmarAlebiary 39:822b66b1c935 446 } else {
OmarAlebiary 39:822b66b1c935 447
OmarAlebiary 39:822b66b1c935 448 // ensure we loop from smallest to largest or else for-loop won't run as expected
OmarAlebiary 39:822b66b1c935 449 unsigned int const start = y_range > 0 ? y0:y1;
OmarAlebiary 39:822b66b1c935 450 unsigned int const stop = y_range > 0 ? y1:y0;
OmarAlebiary 39:822b66b1c935 451
OmarAlebiary 39:822b66b1c935 452 for (unsigned int y = start; y<= stop ; y+=step) {
OmarAlebiary 39:822b66b1c935 453 // do linear interpolation
OmarAlebiary 39:822b66b1c935 454 int const dy = static_cast<int>(y)-static_cast<int>(y0);
OmarAlebiary 39:822b66b1c935 455 unsigned int const x = x0 + x_range * dy / y_range;
OmarAlebiary 39:822b66b1c935 456
OmarAlebiary 39:822b66b1c935 457 // If the line type is '0', this will clear the pixel
OmarAlebiary 39:822b66b1c935 458 // If it is '1' or '2', the pixel will be set
OmarAlebiary 39:822b66b1c935 459 setPixel(x,y, type);
OmarAlebiary 39:822b66b1c935 460 }
OmarAlebiary 39:822b66b1c935 461 }
OmarAlebiary 39:822b66b1c935 462
OmarAlebiary 39:822b66b1c935 463 }
OmarAlebiary 39:822b66b1c935 464
OmarAlebiary 39:822b66b1c935 465 void N5110::drawRect(unsigned int const x0,
OmarAlebiary 39:822b66b1c935 466 unsigned int const y0,
OmarAlebiary 39:822b66b1c935 467 unsigned int const width,
OmarAlebiary 39:822b66b1c935 468 unsigned int const height,
OmarAlebiary 39:822b66b1c935 469 FillType const fill)
OmarAlebiary 39:822b66b1c935 470 {
OmarAlebiary 39:822b66b1c935 471 if (fill == FILL_TRANSPARENT) { // transparent, just outline
OmarAlebiary 39:822b66b1c935 472 drawLine(x0,y0,x0+(width-1),y0,1); // top
OmarAlebiary 39:822b66b1c935 473 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
OmarAlebiary 39:822b66b1c935 474 drawLine(x0,y0,x0,y0+(height-1),1); // left
OmarAlebiary 39:822b66b1c935 475 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
OmarAlebiary 39:822b66b1c935 476 } else { // filled rectangle
OmarAlebiary 39:822b66b1c935 477 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
OmarAlebiary 39:822b66b1c935 478 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
OmarAlebiary 39:822b66b1c935 479 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
OmarAlebiary 39:822b66b1c935 480 }
OmarAlebiary 39:822b66b1c935 481 }
OmarAlebiary 39:822b66b1c935 482 }
OmarAlebiary 39:822b66b1c935 483
OmarAlebiary 39:822b66b1c935 484 void N5110::drawSprite(int x0,
OmarAlebiary 39:822b66b1c935 485 int y0,
OmarAlebiary 39:822b66b1c935 486 int nrows,
OmarAlebiary 39:822b66b1c935 487 int ncols,
OmarAlebiary 39:822b66b1c935 488 int *sprite)
OmarAlebiary 39:822b66b1c935 489 {
OmarAlebiary 39:822b66b1c935 490 for (int i = 0; i < nrows; i++) {
OmarAlebiary 39:822b66b1c935 491 for (int j = 0 ; j < ncols ; j++) {
OmarAlebiary 39:822b66b1c935 492
OmarAlebiary 39:822b66b1c935 493 int pixel = *((sprite+i*ncols)+j);
OmarAlebiary 39:822b66b1c935 494 setPixel(x0+j,y0+i, pixel);
OmarAlebiary 39:822b66b1c935 495 }
OmarAlebiary 39:822b66b1c935 496 }
OmarAlebiary 39:822b66b1c935 497 }