(DA) Internet of Things and Smart Electronics- ELE3006M2122 / Mbed 2 deprecated Final_Project_V19_DLeaming_25574043

Final tidy of code following installation of new sensor, more comments added prior to submission

Dependencies:   mbed

N5110/N5110.cpp@18:fc63b51a0302, 2022-02-04 (annotated)

Committer:
legstar85
Date:
Fri Feb 04 09:20:18 2022 +0000
Revision:
18:fc63b51a0302
Parent:
13:5ad65a688f3f 
Final tidy of code following installation of new sensor, more comments added prior to submission

Who changed what in which revision?

UserRevisionLine numberNew contents of line
legstar85 13:5ad65a688f3f 1 /* * Print String
legstar85 13:5ad65a688f3f 2 *
legstar85 13:5ad65a688f3f 3 * Prints a string of characters to the screen buffer, string is cut off after the 83rd pixel.
legstar85 13:5ad65a688f3f 4 * @param x - the column number (0 to 83)
legstar85 13:5ad65a688f3f 5 * @param y - the row number (0-5) - the display is split into 6 banks - each bank can be considered a row
legstar85 13:5ad65a688f3f 6 * @author - David Leaming - 25574043
legstar85 13:5ad65a688f3f 7 * @ Date - December 2021
legstar85 13:5ad65a688f3f 8 *
legstar85 13:5ad65a688f3f 9 * Acknowledgements
legstar85 13:5ad65a688f3f 10 * Craig A. Evans, University of Leeds, TMP102 Library ,Feb 2016
legstar85 13:5ad65a688f3f 11 * Dr Edmond Nurellari, University of Lincoln, Joystick & N5110 Libraries
legstar85 13:5ad65a688f3f 12 *
legstar85 13:5ad65a688f3f 13 */
legstar85 13:5ad65a688f3f 14
legstar85 13:5ad65a688f3f 15 #include "mbed.h"
legstar85 13:5ad65a688f3f 16 #include "N5110.h"
legstar85 13:5ad65a688f3f 17
legstar85 13:5ad65a688f3f 18 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
legstar85 13:5ad65a688f3f 19 // this constructor works fine with LPC1768 - enough current sourced from GPIO
legstar85 13:5ad65a688f3f 20 // to power LCD. Doesn't work well with K64F.
legstar85 13:5ad65a688f3f 21 N5110::N5110(PinName const pwrPin,
legstar85 13:5ad65a688f3f 22 PinName const scePin,
legstar85 13:5ad65a688f3f 23 PinName const rstPin,
legstar85 13:5ad65a688f3f 24 PinName const dcPin,
legstar85 13:5ad65a688f3f 25 PinName const mosiPin,
legstar85 13:5ad65a688f3f 26 PinName const sclkPin,
legstar85 13:5ad65a688f3f 27 PinName const ledPin)
legstar85 13:5ad65a688f3f 28 :
legstar85 13:5ad65a688f3f 29 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
legstar85 13:5ad65a688f3f 30 _led(new PwmOut(ledPin)),
legstar85 13:5ad65a688f3f 31 _pwr(new DigitalOut(pwrPin)),
legstar85 13:5ad65a688f3f 32 _sce(new DigitalOut(scePin)),
legstar85 13:5ad65a688f3f 33 _rst(new DigitalOut(rstPin)),
legstar85 13:5ad65a688f3f 34 _dc(new DigitalOut(dcPin))
legstar85 13:5ad65a688f3f 35 {}
legstar85 13:5ad65a688f3f 36
legstar85 13:5ad65a688f3f 37 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
legstar85 13:5ad65a688f3f 38 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
legstar85 13:5ad65a688f3f 39 // drive the LCD.
legstar85 13:5ad65a688f3f 40 N5110::N5110(PinName const scePin,
legstar85 13:5ad65a688f3f 41 PinName const rstPin,
legstar85 13:5ad65a688f3f 42 PinName const dcPin,
legstar85 13:5ad65a688f3f 43 PinName const mosiPin,
legstar85 13:5ad65a688f3f 44 PinName const sclkPin,
legstar85 13:5ad65a688f3f 45 PinName const ledPin)
legstar85 13:5ad65a688f3f 46 :
legstar85 13:5ad65a688f3f 47 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
legstar85 13:5ad65a688f3f 48 _led(new PwmOut(ledPin)),
legstar85 13:5ad65a688f3f 49 _pwr(NULL), // pwr not needed so null it to be safe
legstar85 13:5ad65a688f3f 50 _sce(new DigitalOut(scePin)),
legstar85 13:5ad65a688f3f 51 _rst(new DigitalOut(rstPin)),
legstar85 13:5ad65a688f3f 52 _dc(new DigitalOut(dcPin))
legstar85 13:5ad65a688f3f 53 {}
legstar85 13:5ad65a688f3f 54
legstar85 13:5ad65a688f3f 55 N5110::~N5110()
legstar85 13:5ad65a688f3f 56 {
legstar85 13:5ad65a688f3f 57 delete _spi;
legstar85 13:5ad65a688f3f 58
legstar85 13:5ad65a688f3f 59 if(_pwr) {
legstar85 13:5ad65a688f3f 60 delete _pwr;
legstar85 13:5ad65a688f3f 61 }
legstar85 13:5ad65a688f3f 62
legstar85 13:5ad65a688f3f 63 delete _led;
legstar85 13:5ad65a688f3f 64 delete _sce;
legstar85 13:5ad65a688f3f 65 delete _rst;
legstar85 13:5ad65a688f3f 66 delete _dc;
legstar85 13:5ad65a688f3f 67 }
legstar85 13:5ad65a688f3f 68
legstar85 13:5ad65a688f3f 69 // initialise function - powers up and sends the initialisation commands
legstar85 13:5ad65a688f3f 70 void N5110::init()
legstar85 13:5ad65a688f3f 71 {
legstar85 13:5ad65a688f3f 72 turnOn(); // power up
legstar85 13:5ad65a688f3f 73 wait_ms(10); // small delay seems to prevent spurious pixels during mbed reset
legstar85 13:5ad65a688f3f 74 reset(); // reset LCD - must be done within 100 ms
legstar85 13:5ad65a688f3f 75 // initSPI();
legstar85 13:5ad65a688f3f 76
legstar85 13:5ad65a688f3f 77 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
legstar85 13:5ad65a688f3f 78 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
legstar85 13:5ad65a688f3f 79 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
legstar85 13:5ad65a688f3f 80 normalMode(); // normal video mode by default
legstar85 13:5ad65a688f3f 81
legstar85 13:5ad65a688f3f 82 clearRAM(); // RAM is undefined at power-up so clear to be sure
legstar85 13:5ad65a688f3f 83 clear(); // clear buffer
legstar85 13:5ad65a688f3f 84 setBrightness(0.5);
legstar85 13:5ad65a688f3f 85 }
legstar85 13:5ad65a688f3f 86
legstar85 13:5ad65a688f3f 87 // sets normal video mode (black on white)
legstar85 13:5ad65a688f3f 88 void N5110::normalMode()
legstar85 13:5ad65a688f3f 89 {
legstar85 13:5ad65a688f3f 90 sendCommand(0b00100000); // basic instruction
legstar85 13:5ad65a688f3f 91 sendCommand(0b00001100); // normal video mode- datasheet
legstar85 13:5ad65a688f3f 92 }
legstar85 13:5ad65a688f3f 93
legstar85 13:5ad65a688f3f 94 // sets normal video mode (white on black)
legstar85 13:5ad65a688f3f 95 void N5110::inverseMode()
legstar85 13:5ad65a688f3f 96 {
legstar85 13:5ad65a688f3f 97 sendCommand(0b00100000); // basic instruction
legstar85 13:5ad65a688f3f 98 sendCommand(0b00001101); // inverse video mode - datasheet
legstar85 13:5ad65a688f3f 99 }
legstar85 13:5ad65a688f3f 100
legstar85 13:5ad65a688f3f 101 // function to power up the LCD and backlight - only works when using GPIO to power
legstar85 13:5ad65a688f3f 102 void N5110::turnOn()
legstar85 13:5ad65a688f3f 103 {
legstar85 13:5ad65a688f3f 104 if (_pwr != NULL) {
legstar85 13:5ad65a688f3f 105 _pwr->write(1); // apply power
legstar85 13:5ad65a688f3f 106 }
legstar85 13:5ad65a688f3f 107 }
legstar85 13:5ad65a688f3f 108
legstar85 13:5ad65a688f3f 109 // function to power down LCD
legstar85 13:5ad65a688f3f 110 void N5110::turnOff()
legstar85 13:5ad65a688f3f 111 {
legstar85 13:5ad65a688f3f 112 clear(); // clear buffer
legstar85 13:5ad65a688f3f 113 refresh();
legstar85 13:5ad65a688f3f 114 setBrightness(0.0); // turn backlight off
legstar85 13:5ad65a688f3f 115 clearRAM(); // clear RAM to ensure specified current consumption
legstar85 13:5ad65a688f3f 116 // send command to ensure we are in basic mode
legstar85 13:5ad65a688f3f 117
legstar85 13:5ad65a688f3f 118 sendCommand(0b00100000); // basic mode
legstar85 13:5ad65a688f3f 119 sendCommand(0b00001000); // clear display
legstar85 13:5ad65a688f3f 120 sendCommand(0b00100001); // extended mode
legstar85 13:5ad65a688f3f 121 sendCommand(0b00100100); // power down
legstar85 13:5ad65a688f3f 122
legstar85 13:5ad65a688f3f 123 // if we are powering the LCD using the GPIO then make it low to turn off
legstar85 13:5ad65a688f3f 124 if (_pwr != NULL) {
legstar85 13:5ad65a688f3f 125 wait_ms(10); // small delay and then turn off the power pin
legstar85 13:5ad65a688f3f 126 _pwr->write(0); // turn off power
legstar85 13:5ad65a688f3f 127 }
legstar85 13:5ad65a688f3f 128
legstar85 13:5ad65a688f3f 129 }
legstar85 13:5ad65a688f3f 130
legstar85 13:5ad65a688f3f 131 // function to change LED backlight brightness
legstar85 13:5ad65a688f3f 132 void N5110::setBrightness(float brightness)
legstar85 13:5ad65a688f3f 133 {
legstar85 13:5ad65a688f3f 134 // check whether brightness is within range
legstar85 13:5ad65a688f3f 135 if (brightness < 0.0f)
legstar85 13:5ad65a688f3f 136 brightness = 0.0f;
legstar85 13:5ad65a688f3f 137 if (brightness > 1.0f)
legstar85 13:5ad65a688f3f 138 brightness = 1.0f;
legstar85 13:5ad65a688f3f 139 // set PWM duty cycle
legstar85 13:5ad65a688f3f 140 _led->write(brightness);
legstar85 13:5ad65a688f3f 141 }
legstar85 13:5ad65a688f3f 142
legstar85 13:5ad65a688f3f 143 void N5110::setContrast(float contrast) {
legstar85 13:5ad65a688f3f 144
legstar85 13:5ad65a688f3f 145 // enforce limits
legstar85 13:5ad65a688f3f 146 if (contrast > 1.0f)
legstar85 13:5ad65a688f3f 147 contrast = 1.0f;
legstar85 13:5ad65a688f3f 148 else if (contrast < 0.0f)
legstar85 13:5ad65a688f3f 149 contrast = 0.0;
legstar85 13:5ad65a688f3f 150
legstar85 13:5ad65a688f3f 151 // convert to char in range 0 to 127 (i.e. 6 bits)
legstar85 13:5ad65a688f3f 152 char ic = char(contrast*127.0f);
legstar85 13:5ad65a688f3f 153
legstar85 13:5ad65a688f3f 154 sendCommand(0b00100001); // extended instruction set
legstar85 13:5ad65a688f3f 155 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
legstar85 13:5ad65a688f3f 156 sendCommand(0b00100000); // back to basic instruction set
legstar85 13:5ad65a688f3f 157 }
legstar85 13:5ad65a688f3f 158
legstar85 13:5ad65a688f3f 159 void N5110::setTempCoefficient(char tc) {
legstar85 13:5ad65a688f3f 160
legstar85 13:5ad65a688f3f 161 // enforce limits
legstar85 13:5ad65a688f3f 162 if (tc>3) {
legstar85 13:5ad65a688f3f 163 tc=3;
legstar85 13:5ad65a688f3f 164 }
legstar85 13:5ad65a688f3f 165
legstar85 13:5ad65a688f3f 166 // temperature coefficient may need increasing at low temperatures
legstar85 13:5ad65a688f3f 167
legstar85 13:5ad65a688f3f 168 sendCommand(0b00100001); // extended instruction set
legstar85 13:5ad65a688f3f 169 sendCommand(0b00000100 | tc);
legstar85 13:5ad65a688f3f 170 sendCommand(0b00100000); // back to basic instruction set
legstar85 13:5ad65a688f3f 171 }
legstar85 13:5ad65a688f3f 172
legstar85 13:5ad65a688f3f 173 void N5110::setBias(char bias) {
legstar85 13:5ad65a688f3f 174
legstar85 13:5ad65a688f3f 175 // from data sheet
legstar85 13:5ad65a688f3f 176 // bias mux rate
legstar85 13:5ad65a688f3f 177 // 0 1:100
legstar85 13:5ad65a688f3f 178 // 1 1:80
legstar85 13:5ad65a688f3f 179 // 2 1:65
legstar85 13:5ad65a688f3f 180 // 3 1:48 (default)
legstar85 13:5ad65a688f3f 181 // 4 1:40/1:34
legstar85 13:5ad65a688f3f 182 // 5 1:24
legstar85 13:5ad65a688f3f 183 // 6 1:18/1:16
legstar85 13:5ad65a688f3f 184 // 7 1:10/1:9/1:8
legstar85 13:5ad65a688f3f 185
legstar85 13:5ad65a688f3f 186 // enforce limits
legstar85 13:5ad65a688f3f 187 if (bias>7) {
legstar85 13:5ad65a688f3f 188 bias=7;
legstar85 13:5ad65a688f3f 189 }
legstar85 13:5ad65a688f3f 190
legstar85 13:5ad65a688f3f 191 sendCommand(0b00100001); // extended mode instruction
legstar85 13:5ad65a688f3f 192 sendCommand(0b00010000 | bias);
legstar85 13:5ad65a688f3f 193 sendCommand(0b00100000); // end of extended mode instruction
legstar85 13:5ad65a688f3f 194 }
legstar85 13:5ad65a688f3f 195
legstar85 13:5ad65a688f3f 196 // pulse the active low reset line
legstar85 13:5ad65a688f3f 197 void N5110::reset()
legstar85 13:5ad65a688f3f 198 {
legstar85 13:5ad65a688f3f 199 _rst->write(0); // reset the LCD
legstar85 13:5ad65a688f3f 200 _rst->write(1);
legstar85 13:5ad65a688f3f 201 }
legstar85 13:5ad65a688f3f 202
legstar85 13:5ad65a688f3f 203 // function to initialise SPI peripheral
legstar85 13:5ad65a688f3f 204 void N5110::initSPI()
legstar85 13:5ad65a688f3f 205 {
legstar85 13:5ad65a688f3f 206 _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
legstar85 13:5ad65a688f3f 207 _spi->frequency(4000000); // maximum of screen is 4 MHz
legstar85 13:5ad65a688f3f 208 }
legstar85 13:5ad65a688f3f 209
legstar85 13:5ad65a688f3f 210 // send a command to the display
legstar85 13:5ad65a688f3f 211 void N5110::sendCommand(unsigned char command)
legstar85 13:5ad65a688f3f 212 {
legstar85 13:5ad65a688f3f 213 _dc->write(0); // set DC low for command
legstar85 13:5ad65a688f3f 214 _sce->write(0); // set CE low to begin frame
legstar85 13:5ad65a688f3f 215 _spi->write(command); // send command
legstar85 13:5ad65a688f3f 216 _dc->write(1); // turn back to data by default
legstar85 13:5ad65a688f3f 217 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
legstar85 13:5ad65a688f3f 218 }
legstar85 13:5ad65a688f3f 219
legstar85 13:5ad65a688f3f 220 // send data to the display at the current XY address
legstar85 13:5ad65a688f3f 221 // dc is set to 1 (i.e. data) after sending a command and so should
legstar85 13:5ad65a688f3f 222 // be the default mode.
legstar85 13:5ad65a688f3f 223 void N5110::sendData(unsigned char data)
legstar85 13:5ad65a688f3f 224 {
legstar85 13:5ad65a688f3f 225 _sce->write(0); // set CE low to begin frame
legstar85 13:5ad65a688f3f 226 _spi->write(data);
legstar85 13:5ad65a688f3f 227 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
legstar85 13:5ad65a688f3f 228 }
legstar85 13:5ad65a688f3f 229
legstar85 13:5ad65a688f3f 230 // this function writes 0 to the 504 bytes to clear the RAM
legstar85 13:5ad65a688f3f 231 void N5110::clearRAM()
legstar85 13:5ad65a688f3f 232 {
legstar85 13:5ad65a688f3f 233 _sce->write(0); //set CE low to begin frame
legstar85 13:5ad65a688f3f 234 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
legstar85 13:5ad65a688f3f 235 _spi->write(0x00); // send 0's
legstar85 13:5ad65a688f3f 236 }
legstar85 13:5ad65a688f3f 237 _sce->write(1); // set CE high to end frame
legstar85 13:5ad65a688f3f 238 }
legstar85 13:5ad65a688f3f 239
legstar85 13:5ad65a688f3f 240 // function to set the XY address in RAM for subsequenct data write
legstar85 13:5ad65a688f3f 241 void N5110::setXYAddress(unsigned int const x,
legstar85 13:5ad65a688f3f 242 unsigned int const y)
legstar85 13:5ad65a688f3f 243 {
legstar85 13:5ad65a688f3f 244 if (x<WIDTH && y<HEIGHT) { // check within range
legstar85 13:5ad65a688f3f 245 sendCommand(0b00100000); // basic instruction
legstar85 13:5ad65a688f3f 246 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
legstar85 13:5ad65a688f3f 247 sendCommand(0b01000000 | y);
legstar85 13:5ad65a688f3f 248 }
legstar85 13:5ad65a688f3f 249 }
legstar85 13:5ad65a688f3f 250
legstar85 13:5ad65a688f3f 251 // These functions are used to set, clear and get the value of pixels in the display
legstar85 13:5ad65a688f3f 252 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
legstar85 13:5ad65a688f3f 253 // function must be called after set and clear in order to update the display
legstar85 13:5ad65a688f3f 254 void N5110::setPixel(unsigned int const x,
legstar85 13:5ad65a688f3f 255 unsigned int const y,
legstar85 13:5ad65a688f3f 256 bool const state)
legstar85 13:5ad65a688f3f 257 {
legstar85 13:5ad65a688f3f 258 if (x<WIDTH && y<HEIGHT) { // check within range
legstar85 13:5ad65a688f3f 259 // calculate bank and shift 1 to required position in the data byte
legstar85 13:5ad65a688f3f 260 if(state) buffer[x][y/8] |= (1 << y%8);
legstar85 13:5ad65a688f3f 261 else buffer[x][y/8] &= ~(1 << y%8);
legstar85 13:5ad65a688f3f 262 }
legstar85 13:5ad65a688f3f 263 }
legstar85 13:5ad65a688f3f 264
legstar85 13:5ad65a688f3f 265 void N5110::clearPixel(unsigned int const x,
legstar85 13:5ad65a688f3f 266 unsigned int const y)
legstar85 13:5ad65a688f3f 267 {
legstar85 13:5ad65a688f3f 268 if (x<WIDTH && y<HEIGHT) { // check within range
legstar85 13:5ad65a688f3f 269 // calculate bank and shift 1 to required position (using bit clear)
legstar85 13:5ad65a688f3f 270 buffer[x][y/8] &= ~(1 << y%8);
legstar85 13:5ad65a688f3f 271 }
legstar85 13:5ad65a688f3f 272 }
legstar85 13:5ad65a688f3f 273
legstar85 13:5ad65a688f3f 274 int N5110::getPixel(unsigned int const x,
legstar85 13:5ad65a688f3f 275 unsigned int const y) const
legstar85 13:5ad65a688f3f 276 {
legstar85 13:5ad65a688f3f 277 if (x<WIDTH && y<HEIGHT) { // check within range
legstar85 13:5ad65a688f3f 278 // return relevant bank and mask required bit
legstar85 13:5ad65a688f3f 279
legstar85 13:5ad65a688f3f 280 int pixel = (int) buffer[x][y/8] & (1 << y%8);
legstar85 13:5ad65a688f3f 281
legstar85 13:5ad65a688f3f 282 if (pixel)
legstar85 13:5ad65a688f3f 283 return 1;
legstar85 13:5ad65a688f3f 284 else
legstar85 13:5ad65a688f3f 285 return 0;
legstar85 13:5ad65a688f3f 286 }
legstar85 13:5ad65a688f3f 287
legstar85 13:5ad65a688f3f 288 return 0;
legstar85 13:5ad65a688f3f 289
legstar85 13:5ad65a688f3f 290 }
legstar85 13:5ad65a688f3f 291
legstar85 13:5ad65a688f3f 292 // function to refresh the display
legstar85 13:5ad65a688f3f 293 void N5110::refresh()
legstar85 13:5ad65a688f3f 294 {
legstar85 13:5ad65a688f3f 295 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
legstar85 13:5ad65a688f3f 296 // address auto increments after printing string, so buffer[0][0] will not coincide
legstar85 13:5ad65a688f3f 297 // with top-left pixel after priting string
legstar85 13:5ad65a688f3f 298
legstar85 13:5ad65a688f3f 299 _sce->write(0); //set CE low to begin frame
legstar85 13:5ad65a688f3f 300
legstar85 13:5ad65a688f3f 301 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
legstar85 13:5ad65a688f3f 302 for(int i = 0; i < WIDTH; i++) {
legstar85 13:5ad65a688f3f 303 _spi->write(buffer[i][j]); // send buffer
legstar85 13:5ad65a688f3f 304 }
legstar85 13:5ad65a688f3f 305 }
legstar85 13:5ad65a688f3f 306 _sce->write(1); // set CE high to end frame
legstar85 13:5ad65a688f3f 307
legstar85 13:5ad65a688f3f 308 }
legstar85 13:5ad65a688f3f 309
legstar85 13:5ad65a688f3f 310 // fills the buffer with random bytes. Can be used to test the display.
legstar85 13:5ad65a688f3f 311 // The rand() function isn't seeded so it probably creates the same pattern everytime
legstar85 13:5ad65a688f3f 312 void N5110::randomiseBuffer()
legstar85 13:5ad65a688f3f 313 {
legstar85 13:5ad65a688f3f 314 int i,j;
legstar85 13:5ad65a688f3f 315 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
legstar85 13:5ad65a688f3f 316 for(i = 0; i < WIDTH; i++) {
legstar85 13:5ad65a688f3f 317 buffer[i][j] = rand()%256; // generate random byte
legstar85 13:5ad65a688f3f 318 }
legstar85 13:5ad65a688f3f 319 }
legstar85 13:5ad65a688f3f 320
legstar85 13:5ad65a688f3f 321 }
legstar85 13:5ad65a688f3f 322
legstar85 13:5ad65a688f3f 323 // function to print 5x7 font
legstar85 13:5ad65a688f3f 324 void N5110::printChar(char const c,
legstar85 13:5ad65a688f3f 325 unsigned int const x,
legstar85 13:5ad65a688f3f 326 unsigned int const y)
legstar85 13:5ad65a688f3f 327 {
legstar85 13:5ad65a688f3f 328 if (y<BANKS) { // check if printing in range of y banks
legstar85 13:5ad65a688f3f 329
legstar85 13:5ad65a688f3f 330 for (int i = 0; i < 5 ; i++ ) {
legstar85 13:5ad65a688f3f 331 int pixel_x = x+i;
legstar85 13:5ad65a688f3f 332 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
legstar85 13:5ad65a688f3f 333 break;
legstar85 13:5ad65a688f3f 334 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
legstar85 13:5ad65a688f3f 335 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
legstar85 13:5ad65a688f3f 336 }
legstar85 13:5ad65a688f3f 337
legstar85 13:5ad65a688f3f 338 }
legstar85 13:5ad65a688f3f 339 }
legstar85 13:5ad65a688f3f 340
legstar85 13:5ad65a688f3f 341 // function to print string at specified position
legstar85 13:5ad65a688f3f 342 void N5110::printString(const char *str,
legstar85 13:5ad65a688f3f 343 unsigned int const x,
legstar85 13:5ad65a688f3f 344 unsigned int const y)
legstar85 13:5ad65a688f3f 345 {
legstar85 13:5ad65a688f3f 346 if (y<BANKS) { // check if printing in range of y banks
legstar85 13:5ad65a688f3f 347
legstar85 13:5ad65a688f3f 348 int n = 0 ; // counter for number of characters in string
legstar85 13:5ad65a688f3f 349 // loop through string and print character
legstar85 13:5ad65a688f3f 350 while(*str) {
legstar85 13:5ad65a688f3f 351
legstar85 13:5ad65a688f3f 352 // writes the character bitmap data to the buffer, so that
legstar85 13:5ad65a688f3f 353 // text and pixels can be displayed at the same time
legstar85 13:5ad65a688f3f 354 for (int i = 0; i < 5 ; i++ ) {
legstar85 13:5ad65a688f3f 355 int pixel_x = x+i+n*6;
legstar85 13:5ad65a688f3f 356 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
legstar85 13:5ad65a688f3f 357 break;
legstar85 13:5ad65a688f3f 358 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
legstar85 13:5ad65a688f3f 359 }
legstar85 13:5ad65a688f3f 360 str++; // go to next character in string
legstar85 13:5ad65a688f3f 361 n++; // increment index
legstar85 13:5ad65a688f3f 362 }
legstar85 13:5ad65a688f3f 363 }
legstar85 13:5ad65a688f3f 364 }
legstar85 13:5ad65a688f3f 365
legstar85 13:5ad65a688f3f 366 // function to clear the screen buffer
legstar85 13:5ad65a688f3f 367 void N5110::clear()
legstar85 13:5ad65a688f3f 368 {
legstar85 13:5ad65a688f3f 369 memset(buffer,0,sizeof(buffer));
legstar85 13:5ad65a688f3f 370 }
legstar85 13:5ad65a688f3f 371
legstar85 13:5ad65a688f3f 372 // function to plot array on display
legstar85 13:5ad65a688f3f 373 void N5110::plotArray(float const array[])
legstar85 13:5ad65a688f3f 374 {
legstar85 13:5ad65a688f3f 375 for (int i=0; i<WIDTH; i++) { // loop through array
legstar85 13:5ad65a688f3f 376 // elements are normalised from 0.0 to 1.0, so multiply
legstar85 13:5ad65a688f3f 377 // by 47 to convert to pixel range, and subtract from 47
legstar85 13:5ad65a688f3f 378 // since top-left is 0,0 in the display geometry
legstar85 13:5ad65a688f3f 379 setPixel(i,47 - int(array[i]*47.0f),true);
legstar85 13:5ad65a688f3f 380 }
legstar85 13:5ad65a688f3f 381
legstar85 13:5ad65a688f3f 382 }
legstar85 13:5ad65a688f3f 383
legstar85 13:5ad65a688f3f 384 // function to draw circle
legstar85 13:5ad65a688f3f 385 void N5110:: drawCircle(unsigned int const x0,
legstar85 13:5ad65a688f3f 386 unsigned int const y0,
legstar85 13:5ad65a688f3f 387 unsigned int const radius,
legstar85 13:5ad65a688f3f 388 FillType const fill)
legstar85 13:5ad65a688f3f 389 {
legstar85 13:5ad65a688f3f 390 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
legstar85 13:5ad65a688f3f 391 int x = radius;
legstar85 13:5ad65a688f3f 392 int y = 0;
legstar85 13:5ad65a688f3f 393 int radiusError = 1-x;
legstar85 13:5ad65a688f3f 394
legstar85 13:5ad65a688f3f 395 while(x >= y) {
legstar85 13:5ad65a688f3f 396
legstar85 13:5ad65a688f3f 397 // if transparent, just draw outline
legstar85 13:5ad65a688f3f 398 if (fill == FILL_TRANSPARENT) {
legstar85 13:5ad65a688f3f 399 setPixel( x + x0, y + y0,true);
legstar85 13:5ad65a688f3f 400 setPixel(-x + x0, y + y0,true);
legstar85 13:5ad65a688f3f 401 setPixel( y + x0, x + y0,true);
legstar85 13:5ad65a688f3f 402 setPixel(-y + x0, x + y0,true);
legstar85 13:5ad65a688f3f 403 setPixel(-y + x0, -x + y0,true);
legstar85 13:5ad65a688f3f 404 setPixel( y + x0, -x + y0,true);
legstar85 13:5ad65a688f3f 405 setPixel( x + x0, -y + y0,true);
legstar85 13:5ad65a688f3f 406 setPixel(-x + x0, -y + y0,true);
legstar85 13:5ad65a688f3f 407 } else { // drawing filled circle, so draw lines between points at same y value
legstar85 13:5ad65a688f3f 408
legstar85 13:5ad65a688f3f 409 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
legstar85 13:5ad65a688f3f 410
legstar85 13:5ad65a688f3f 411 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
legstar85 13:5ad65a688f3f 412 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
legstar85 13:5ad65a688f3f 413 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
legstar85 13:5ad65a688f3f 414 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
legstar85 13:5ad65a688f3f 415 }
legstar85 13:5ad65a688f3f 416
legstar85 13:5ad65a688f3f 417 y++;
legstar85 13:5ad65a688f3f 418 if (radiusError<0) {
legstar85 13:5ad65a688f3f 419 radiusError += 2 * y + 1;
legstar85 13:5ad65a688f3f 420 } else {
legstar85 13:5ad65a688f3f 421 x--;
legstar85 13:5ad65a688f3f 422 radiusError += 2 * (y - x) + 1;
legstar85 13:5ad65a688f3f 423 }
legstar85 13:5ad65a688f3f 424 }
legstar85 13:5ad65a688f3f 425
legstar85 13:5ad65a688f3f 426 }
legstar85 13:5ad65a688f3f 427
legstar85 13:5ad65a688f3f 428 void N5110::drawLine(unsigned int const x0,
legstar85 13:5ad65a688f3f 429 unsigned int const y0,
legstar85 13:5ad65a688f3f 430 unsigned int const x1,
legstar85 13:5ad65a688f3f 431 unsigned int const y1,
legstar85 13:5ad65a688f3f 432 unsigned int const type)
legstar85 13:5ad65a688f3f 433 {
legstar85 13:5ad65a688f3f 434 // Note that the ranges can be negative so we have to turn the input values
legstar85 13:5ad65a688f3f 435 // into signed integers first
legstar85 13:5ad65a688f3f 436 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
legstar85 13:5ad65a688f3f 437 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
legstar85 13:5ad65a688f3f 438
legstar85 13:5ad65a688f3f 439 // if dotted line, set step to 2, else step is 1
legstar85 13:5ad65a688f3f 440 unsigned int const step = (type==2) ? 2:1;
legstar85 13:5ad65a688f3f 441
legstar85 13:5ad65a688f3f 442 // make sure we loop over the largest range to get the most pixels on the display
legstar85 13:5ad65a688f3f 443 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
legstar85 13:5ad65a688f3f 444 // or else we'll only end up with 1 pixel in the x column
legstar85 13:5ad65a688f3f 445 if ( abs(x_range) > abs(y_range) ) {
legstar85 13:5ad65a688f3f 446
legstar85 13:5ad65a688f3f 447 // ensure we loop from smallest to largest or else for-loop won't run as expected
legstar85 13:5ad65a688f3f 448 unsigned int const start = x_range > 0 ? x0:x1;
legstar85 13:5ad65a688f3f 449 unsigned int const stop = x_range > 0 ? x1:x0;
legstar85 13:5ad65a688f3f 450
legstar85 13:5ad65a688f3f 451 // loop between x pixels
legstar85 13:5ad65a688f3f 452 for (unsigned int x = start; x<= stop ; x+=step) {
legstar85 13:5ad65a688f3f 453 // do linear interpolation
legstar85 13:5ad65a688f3f 454 int const dx = static_cast<int>(x)-static_cast<int>(x0);
legstar85 13:5ad65a688f3f 455 unsigned int const y = y0 + y_range * dx / x_range;
legstar85 13:5ad65a688f3f 456
legstar85 13:5ad65a688f3f 457 // If the line type is '0', this will clear the pixel
legstar85 13:5ad65a688f3f 458 // If it is '1' or '2', the pixel will be set
legstar85 13:5ad65a688f3f 459 setPixel(x,y, type);
legstar85 13:5ad65a688f3f 460 }
legstar85 13:5ad65a688f3f 461 } else {
legstar85 13:5ad65a688f3f 462
legstar85 13:5ad65a688f3f 463 // ensure we loop from smallest to largest or else for-loop won't run as expected
legstar85 13:5ad65a688f3f 464 unsigned int const start = y_range > 0 ? y0:y1;
legstar85 13:5ad65a688f3f 465 unsigned int const stop = y_range > 0 ? y1:y0;
legstar85 13:5ad65a688f3f 466
legstar85 13:5ad65a688f3f 467 for (unsigned int y = start; y<= stop ; y+=step) {
legstar85 13:5ad65a688f3f 468 // do linear interpolation
legstar85 13:5ad65a688f3f 469 int const dy = static_cast<int>(y)-static_cast<int>(y0);
legstar85 13:5ad65a688f3f 470 unsigned int const x = x0 + x_range * dy / y_range;
legstar85 13:5ad65a688f3f 471
legstar85 13:5ad65a688f3f 472 // If the line type is '0', this will clear the pixel
legstar85 13:5ad65a688f3f 473 // If it is '1' or '2', the pixel will be set
legstar85 13:5ad65a688f3f 474 setPixel(x,y, type);
legstar85 13:5ad65a688f3f 475 }
legstar85 13:5ad65a688f3f 476 }
legstar85 13:5ad65a688f3f 477
legstar85 13:5ad65a688f3f 478 }
legstar85 13:5ad65a688f3f 479
legstar85 13:5ad65a688f3f 480 void N5110::drawRect(unsigned int const x0,
legstar85 13:5ad65a688f3f 481 unsigned int const y0,
legstar85 13:5ad65a688f3f 482 unsigned int const width,
legstar85 13:5ad65a688f3f 483 unsigned int const height,
legstar85 13:5ad65a688f3f 484 FillType const fill)
legstar85 13:5ad65a688f3f 485 {
legstar85 13:5ad65a688f3f 486 if (fill == FILL_TRANSPARENT) { // transparent, just outline
legstar85 13:5ad65a688f3f 487 drawLine(x0,y0,x0+(width-1),y0,1); // top
legstar85 13:5ad65a688f3f 488 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
legstar85 13:5ad65a688f3f 489 drawLine(x0,y0,x0,y0+(height-1),1); // left
legstar85 13:5ad65a688f3f 490 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
legstar85 13:5ad65a688f3f 491 } else { // filled rectangle
legstar85 13:5ad65a688f3f 492 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
legstar85 13:5ad65a688f3f 493 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
legstar85 13:5ad65a688f3f 494 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
legstar85 13:5ad65a688f3f 495 }
legstar85 13:5ad65a688f3f 496 }
legstar85 13:5ad65a688f3f 497 }
legstar85 13:5ad65a688f3f 498
legstar85 13:5ad65a688f3f 499 void N5110::drawSprite(int x0,
legstar85 13:5ad65a688f3f 500 int y0,
legstar85 13:5ad65a688f3f 501 int nrows,
legstar85 13:5ad65a688f3f 502 int ncols,
legstar85 13:5ad65a688f3f 503 int *sprite)
legstar85 13:5ad65a688f3f 504 {
legstar85 13:5ad65a688f3f 505 for (int i = 0; i < nrows; i++) {
legstar85 13:5ad65a688f3f 506 for (int j = 0 ; j < ncols ; j++) {
legstar85 13:5ad65a688f3f 507
legstar85 13:5ad65a688f3f 508 int pixel = *((sprite+i*ncols)+j);
legstar85 13:5ad65a688f3f 509 setPixel(x0+j,y0+i, pixel);
legstar85 13:5ad65a688f3f 510 }
legstar85 13:5ad65a688f3f 511 }
legstar85 13:5ad65a688f3f 512 }