ELEC2645 (2018/19) / Mbed 2 deprecated el17dg

Initial publish

Dependencies:   mbed

Fork of el17dg by Dmitrijs Griskovs

N5110/N5110.cpp@40:e3bbda7444fa, 2019-05-07 (annotated)

Committer:
Noximilien
Date:
Tue May 07 15:22:35 2019 +0000
Revision:
40:e3bbda7444fa
Parent:
9:5ad5501c702e 
The Final, Submission Version. I have read and agreed to the academic integrity. SID:201160286

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Noximilien 1:5aa2312d3e94 1 #include "mbed.h"
Noximilien 1:5aa2312d3e94 2 #include "N5110.h"
Noximilien 1:5aa2312d3e94 3
Noximilien 1:5aa2312d3e94 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
Noximilien 1:5aa2312d3e94 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
Noximilien 1:5aa2312d3e94 6 // to power LCD. Doesn't work well with K64F.
Noximilien 1:5aa2312d3e94 7 N5110::N5110(PinName const pwrPin,
Noximilien 1:5aa2312d3e94 8 PinName const scePin,
Noximilien 1:5aa2312d3e94 9 PinName const rstPin,
Noximilien 1:5aa2312d3e94 10 PinName const dcPin,
Noximilien 1:5aa2312d3e94 11 PinName const mosiPin,
Noximilien 1:5aa2312d3e94 12 PinName const sclkPin,
Noximilien 1:5aa2312d3e94 13 PinName const ledPin)
Noximilien 1:5aa2312d3e94 14 :
Noximilien 1:5aa2312d3e94 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
Noximilien 1:5aa2312d3e94 16 _led(new PwmOut(ledPin)),
Noximilien 1:5aa2312d3e94 17 _pwr(new DigitalOut(pwrPin)),
Noximilien 1:5aa2312d3e94 18 _sce(new DigitalOut(scePin)),
Noximilien 1:5aa2312d3e94 19 _rst(new DigitalOut(rstPin)),
Noximilien 1:5aa2312d3e94 20 _dc(new DigitalOut(dcPin))
Noximilien 1:5aa2312d3e94 21 {}
Noximilien 1:5aa2312d3e94 22
Noximilien 1:5aa2312d3e94 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
Noximilien 1:5aa2312d3e94 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
Noximilien 1:5aa2312d3e94 25 // drive the LCD.
Noximilien 1:5aa2312d3e94 26 N5110::N5110(PinName const scePin,
Noximilien 1:5aa2312d3e94 27 PinName const rstPin,
Noximilien 1:5aa2312d3e94 28 PinName const dcPin,
Noximilien 1:5aa2312d3e94 29 PinName const mosiPin,
Noximilien 1:5aa2312d3e94 30 PinName const sclkPin,
Noximilien 1:5aa2312d3e94 31 PinName const ledPin)
Noximilien 1:5aa2312d3e94 32 :
Noximilien 1:5aa2312d3e94 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
Noximilien 1:5aa2312d3e94 34 _led(new PwmOut(ledPin)),
Noximilien 1:5aa2312d3e94 35 _pwr(NULL), // pwr not needed so null it to be safe
Noximilien 1:5aa2312d3e94 36 _sce(new DigitalOut(scePin)),
Noximilien 1:5aa2312d3e94 37 _rst(new DigitalOut(rstPin)),
Noximilien 1:5aa2312d3e94 38 _dc(new DigitalOut(dcPin))
Noximilien 1:5aa2312d3e94 39 {}
Noximilien 1:5aa2312d3e94 40
Noximilien 1:5aa2312d3e94 41 N5110::~N5110()
Noximilien 1:5aa2312d3e94 42 {
Noximilien 1:5aa2312d3e94 43 delete _spi;
Noximilien 1:5aa2312d3e94 44
Noximilien 1:5aa2312d3e94 45 if(_pwr) {
Noximilien 1:5aa2312d3e94 46 delete _pwr;
Noximilien 1:5aa2312d3e94 47 }
Noximilien 1:5aa2312d3e94 48
Noximilien 1:5aa2312d3e94 49 delete _led;
Noximilien 1:5aa2312d3e94 50 delete _sce;
Noximilien 1:5aa2312d3e94 51 delete _rst;
Noximilien 1:5aa2312d3e94 52 delete _dc;
Noximilien 1:5aa2312d3e94 53 }
Noximilien 1:5aa2312d3e94 54
Noximilien 1:5aa2312d3e94 55 // initialise function - powers up and sends the initialisation commands
Noximilien 1:5aa2312d3e94 56 void N5110::init()
Noximilien 1:5aa2312d3e94 57 {
Noximilien 1:5aa2312d3e94 58 turnOn(); // power up
Noximilien 1:5aa2312d3e94 59 reset(); // reset LCD - must be done within 100 ms
Noximilien 1:5aa2312d3e94 60 initSPI();
Noximilien 1:5aa2312d3e94 61
Noximilien 1:5aa2312d3e94 62 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
Noximilien 1:5aa2312d3e94 63 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
Noximilien 1:5aa2312d3e94 64 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
Noximilien 1:5aa2312d3e94 65 normalMode(); // normal video mode by default
Noximilien 1:5aa2312d3e94 66
Noximilien 1:5aa2312d3e94 67 clearRAM(); // RAM is undefined at power-up so clear to be sure
Noximilien 1:5aa2312d3e94 68 clear(); // clear buffer
Noximilien 1:5aa2312d3e94 69 setBrightness(0.5);
Noximilien 1:5aa2312d3e94 70 }
Noximilien 1:5aa2312d3e94 71
Noximilien 1:5aa2312d3e94 72 // sets normal video mode (black on white)
Noximilien 1:5aa2312d3e94 73 void N5110::normalMode()
Noximilien 1:5aa2312d3e94 74 {
Noximilien 1:5aa2312d3e94 75 sendCommand(0b00100000); // basic instruction
Noximilien 1:5aa2312d3e94 76 sendCommand(0b00001100); // normal video mode- datasheet
Noximilien 1:5aa2312d3e94 77 }
Noximilien 1:5aa2312d3e94 78
Noximilien 1:5aa2312d3e94 79 // sets normal video mode (white on black)
Noximilien 1:5aa2312d3e94 80 void N5110::inverseMode()
Noximilien 1:5aa2312d3e94 81 {
Noximilien 1:5aa2312d3e94 82 sendCommand(0b00100000); // basic instruction
Noximilien 1:5aa2312d3e94 83 sendCommand(0b00001101); // inverse video mode - datasheet
Noximilien 1:5aa2312d3e94 84 }
Noximilien 1:5aa2312d3e94 85
Noximilien 1:5aa2312d3e94 86 // function to power up the LCD and backlight - only works when using GPIO to power
Noximilien 1:5aa2312d3e94 87 void N5110::turnOn()
Noximilien 1:5aa2312d3e94 88 {
Noximilien 1:5aa2312d3e94 89 if (_pwr != NULL) {
Noximilien 1:5aa2312d3e94 90 _pwr->write(1); // apply power
Noximilien 1:5aa2312d3e94 91 }
Noximilien 1:5aa2312d3e94 92 }
Noximilien 1:5aa2312d3e94 93
Noximilien 1:5aa2312d3e94 94 // function to power down LCD
Noximilien 1:5aa2312d3e94 95 void N5110::turnOff()
Noximilien 1:5aa2312d3e94 96 {
Noximilien 1:5aa2312d3e94 97 clear(); // clear buffer
Noximilien 1:5aa2312d3e94 98 refresh();
Noximilien 1:5aa2312d3e94 99 setBrightness(0.0); // turn backlight off
Noximilien 1:5aa2312d3e94 100 clearRAM(); // clear RAM to ensure specified current consumption
Noximilien 1:5aa2312d3e94 101 // send command to ensure we are in basic mode
Noximilien 1:5aa2312d3e94 102
Noximilien 1:5aa2312d3e94 103 sendCommand(0b00100000); // basic mode
Noximilien 1:5aa2312d3e94 104 sendCommand(0b00001000); // clear display
Noximilien 1:5aa2312d3e94 105 sendCommand(0b00100001); // extended mode
Noximilien 1:5aa2312d3e94 106 sendCommand(0b00100100); // power down
Noximilien 1:5aa2312d3e94 107
Noximilien 1:5aa2312d3e94 108 // if we are powering the LCD using the GPIO then make it low to turn off
Noximilien 1:5aa2312d3e94 109 if (_pwr != NULL) {
Noximilien 1:5aa2312d3e94 110 wait_ms(10); // small delay and then turn off the power pin
Noximilien 1:5aa2312d3e94 111 _pwr->write(0); // turn off power
Noximilien 1:5aa2312d3e94 112 }
Noximilien 1:5aa2312d3e94 113
Noximilien 1:5aa2312d3e94 114 }
Noximilien 1:5aa2312d3e94 115
Noximilien 1:5aa2312d3e94 116 // function to change LED backlight brightness
Noximilien 1:5aa2312d3e94 117 void N5110::setBrightness(float brightness)
Noximilien 1:5aa2312d3e94 118 {
Noximilien 1:5aa2312d3e94 119 // check whether brightness is within range
Noximilien 1:5aa2312d3e94 120 if (brightness < 0.0f)
Noximilien 1:5aa2312d3e94 121 brightness = 0.0f;
Noximilien 1:5aa2312d3e94 122 if (brightness > 1.0f)
Noximilien 1:5aa2312d3e94 123 brightness = 1.0f;
Noximilien 1:5aa2312d3e94 124 // set PWM duty cycle
Noximilien 1:5aa2312d3e94 125 _led->write(brightness);
Noximilien 1:5aa2312d3e94 126 }
Noximilien 1:5aa2312d3e94 127
Noximilien 1:5aa2312d3e94 128 void N5110::setContrast(float contrast) {
Noximilien 1:5aa2312d3e94 129
Noximilien 1:5aa2312d3e94 130 // enforce limits
Noximilien 1:5aa2312d3e94 131 if (contrast > 1.0f)
Noximilien 1:5aa2312d3e94 132 contrast = 1.0f;
Noximilien 1:5aa2312d3e94 133 else if (contrast < 0.0f)
Noximilien 1:5aa2312d3e94 134 contrast = 0.0;
Noximilien 1:5aa2312d3e94 135
Noximilien 1:5aa2312d3e94 136 // convert to char in range 0 to 127 (i.e. 6 bits)
Noximilien 1:5aa2312d3e94 137 char ic = char(contrast*127.0f);
Noximilien 1:5aa2312d3e94 138
Noximilien 1:5aa2312d3e94 139 sendCommand(0b00100001); // extended instruction set
Noximilien 1:5aa2312d3e94 140 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
Noximilien 1:5aa2312d3e94 141 sendCommand(0b00100000); // back to basic instruction set
Noximilien 1:5aa2312d3e94 142 }
Noximilien 1:5aa2312d3e94 143
Noximilien 1:5aa2312d3e94 144 void N5110::setTempCoefficient(char tc) {
Noximilien 1:5aa2312d3e94 145
Noximilien 1:5aa2312d3e94 146 // enforce limits
Noximilien 1:5aa2312d3e94 147 if (tc>3) {
Noximilien 1:5aa2312d3e94 148 tc=3;
Noximilien 1:5aa2312d3e94 149 }
Noximilien 1:5aa2312d3e94 150
Noximilien 1:5aa2312d3e94 151 // temperature coefficient may need increasing at low temperatures
Noximilien 1:5aa2312d3e94 152
Noximilien 1:5aa2312d3e94 153 sendCommand(0b00100001); // extended instruction set
Noximilien 1:5aa2312d3e94 154 sendCommand(0b00000100 | tc);
Noximilien 1:5aa2312d3e94 155 sendCommand(0b00100000); // back to basic instruction set
Noximilien 1:5aa2312d3e94 156 }
Noximilien 1:5aa2312d3e94 157
Noximilien 1:5aa2312d3e94 158 void N5110::setBias(char bias) {
Noximilien 1:5aa2312d3e94 159
Noximilien 1:5aa2312d3e94 160 // from data sheet
Noximilien 1:5aa2312d3e94 161 // bias mux rate
Noximilien 1:5aa2312d3e94 162 // 0 1:100
Noximilien 1:5aa2312d3e94 163 // 1 1:80
Noximilien 1:5aa2312d3e94 164 // 2 1:65
Noximilien 1:5aa2312d3e94 165 // 3 1:48 (default)
Noximilien 1:5aa2312d3e94 166 // 4 1:40/1:34
Noximilien 1:5aa2312d3e94 167 // 5 1:24
Noximilien 1:5aa2312d3e94 168 // 6 1:18/1:16
Noximilien 1:5aa2312d3e94 169 // 7 1:10/1:9/1:8
Noximilien 1:5aa2312d3e94 170
Noximilien 1:5aa2312d3e94 171 // enforce limits
Noximilien 1:5aa2312d3e94 172 if (bias>7) {
Noximilien 1:5aa2312d3e94 173 bias=7;
Noximilien 1:5aa2312d3e94 174 }
Noximilien 1:5aa2312d3e94 175
Noximilien 1:5aa2312d3e94 176 sendCommand(0b00100001); // extended mode instruction
Noximilien 1:5aa2312d3e94 177 sendCommand(0b00010000 | bias);
Noximilien 1:5aa2312d3e94 178 sendCommand(0b00100000); // end of extended mode instruction
Noximilien 1:5aa2312d3e94 179 }
Noximilien 1:5aa2312d3e94 180
Noximilien 1:5aa2312d3e94 181 // pulse the active low reset line
Noximilien 1:5aa2312d3e94 182 void N5110::reset()
Noximilien 1:5aa2312d3e94 183 {
Noximilien 1:5aa2312d3e94 184 _rst->write(0); // reset the LCD
Noximilien 1:5aa2312d3e94 185 _rst->write(1);
Noximilien 1:5aa2312d3e94 186 }
Noximilien 1:5aa2312d3e94 187
Noximilien 1:5aa2312d3e94 188 // function to initialise SPI peripheral
Noximilien 1:5aa2312d3e94 189 void N5110::initSPI()
Noximilien 1:5aa2312d3e94 190 {
Noximilien 1:5aa2312d3e94 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
Noximilien 1:5aa2312d3e94 192 _spi->frequency(4000000); // maximum of screen is 4 MHz
Noximilien 1:5aa2312d3e94 193 }
Noximilien 1:5aa2312d3e94 194
Noximilien 1:5aa2312d3e94 195 // send a command to the display
Noximilien 1:5aa2312d3e94 196 void N5110::sendCommand(unsigned char command)
Noximilien 1:5aa2312d3e94 197 {
Noximilien 1:5aa2312d3e94 198 _dc->write(0); // set DC low for command
Noximilien 1:5aa2312d3e94 199 _sce->write(0); // set CE low to begin frame
Noximilien 1:5aa2312d3e94 200 _spi->write(command); // send command
Noximilien 1:5aa2312d3e94 201 _dc->write(1); // turn back to data by default
Noximilien 1:5aa2312d3e94 202 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
Noximilien 1:5aa2312d3e94 203 }
Noximilien 1:5aa2312d3e94 204
Noximilien 1:5aa2312d3e94 205 // send data to the display at the current XY address
Noximilien 1:5aa2312d3e94 206 // dc is set to 1 (i.e. data) after sending a command and so should
Noximilien 1:5aa2312d3e94 207 // be the default mode.
Noximilien 1:5aa2312d3e94 208 void N5110::sendData(unsigned char data)
Noximilien 1:5aa2312d3e94 209 {
Noximilien 1:5aa2312d3e94 210 _sce->write(0); // set CE low to begin frame
Noximilien 1:5aa2312d3e94 211 _spi->write(data);
Noximilien 1:5aa2312d3e94 212 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
Noximilien 1:5aa2312d3e94 213 }
Noximilien 1:5aa2312d3e94 214
Noximilien 1:5aa2312d3e94 215 // this function writes 0 to the 504 bytes to clear the RAM
Noximilien 1:5aa2312d3e94 216 void N5110::clearRAM()
Noximilien 1:5aa2312d3e94 217 {
Noximilien 1:5aa2312d3e94 218 _sce->write(0); //set CE low to begin frame
Noximilien 1:5aa2312d3e94 219 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
Noximilien 1:5aa2312d3e94 220 _spi->write(0x00); // send 0's
Noximilien 1:5aa2312d3e94 221 }
Noximilien 1:5aa2312d3e94 222 _sce->write(1); // set CE high to end frame
Noximilien 1:5aa2312d3e94 223 }
Noximilien 1:5aa2312d3e94 224
Noximilien 1:5aa2312d3e94 225 // function to set the XY address in RAM for subsequenct data write
Noximilien 1:5aa2312d3e94 226 void N5110::setXYAddress(unsigned int const x,
Noximilien 1:5aa2312d3e94 227 unsigned int const y)
Noximilien 1:5aa2312d3e94 228 {
Noximilien 1:5aa2312d3e94 229 if (x<WIDTH && y<HEIGHT) { // check within range
Noximilien 1:5aa2312d3e94 230 sendCommand(0b00100000); // basic instruction
Noximilien 1:5aa2312d3e94 231 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
Noximilien 1:5aa2312d3e94 232 sendCommand(0b01000000 | y);
Noximilien 1:5aa2312d3e94 233 }
Noximilien 1:5aa2312d3e94 234 }
Noximilien 1:5aa2312d3e94 235
Noximilien 1:5aa2312d3e94 236 // These functions are used to set, clear and get the value of pixels in the display
Noximilien 1:5aa2312d3e94 237 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
Noximilien 1:5aa2312d3e94 238 // function must be called after set and clear in order to update the display
Noximilien 1:5aa2312d3e94 239 void N5110::setPixel(unsigned int const x,
Noximilien 1:5aa2312d3e94 240 unsigned int const y,
Noximilien 1:5aa2312d3e94 241 bool const state)
Noximilien 1:5aa2312d3e94 242 {
Noximilien 1:5aa2312d3e94 243 if (x<WIDTH && y<HEIGHT) { // check within range
Noximilien 1:5aa2312d3e94 244 // calculate bank and shift 1 to required position in the data byte
Noximilien 1:5aa2312d3e94 245 if(state) buffer[x][y/8] |= (1 << y%8);
Noximilien 1:5aa2312d3e94 246 else buffer[x][y/8] &= ~(1 << y%8);
Noximilien 1:5aa2312d3e94 247 }
Noximilien 1:5aa2312d3e94 248 }
Noximilien 1:5aa2312d3e94 249
Noximilien 1:5aa2312d3e94 250 void N5110::clearPixel(unsigned int const x,
Noximilien 1:5aa2312d3e94 251 unsigned int const y)
Noximilien 1:5aa2312d3e94 252 {
Noximilien 1:5aa2312d3e94 253 if (x<WIDTH && y<HEIGHT) { // check within range
Noximilien 1:5aa2312d3e94 254 // calculate bank and shift 1 to required position (using bit clear)
Noximilien 1:5aa2312d3e94 255 buffer[x][y/8] &= ~(1 << y%8);
Noximilien 1:5aa2312d3e94 256 }
Noximilien 1:5aa2312d3e94 257 }
Noximilien 1:5aa2312d3e94 258
Noximilien 1:5aa2312d3e94 259 int N5110::getPixel(unsigned int const x,
Noximilien 1:5aa2312d3e94 260 unsigned int const y) const
Noximilien 1:5aa2312d3e94 261 {
Noximilien 1:5aa2312d3e94 262 if (x<WIDTH && y<HEIGHT) { // check within range
Noximilien 1:5aa2312d3e94 263 // return relevant bank and mask required bit
Noximilien 1:5aa2312d3e94 264
Noximilien 1:5aa2312d3e94 265 int pixel = (int) buffer[x][y/8] & (1 << y%8);
Noximilien 1:5aa2312d3e94 266
Noximilien 1:5aa2312d3e94 267 if (pixel)
Noximilien 1:5aa2312d3e94 268 return 1;
Noximilien 1:5aa2312d3e94 269 else
Noximilien 1:5aa2312d3e94 270 return 0;
Noximilien 1:5aa2312d3e94 271 }
Noximilien 1:5aa2312d3e94 272
Noximilien 1:5aa2312d3e94 273 return 0;
Noximilien 1:5aa2312d3e94 274
Noximilien 1:5aa2312d3e94 275 }
Noximilien 1:5aa2312d3e94 276
Noximilien 1:5aa2312d3e94 277 // function to refresh the display
Noximilien 1:5aa2312d3e94 278 void N5110::refresh()
Noximilien 1:5aa2312d3e94 279 {
Noximilien 1:5aa2312d3e94 280 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
Noximilien 1:5aa2312d3e94 281 // address auto increments after printing string, so buffer[0][0] will not coincide
Noximilien 1:5aa2312d3e94 282 // with top-left pixel after priting string
Noximilien 1:5aa2312d3e94 283
Noximilien 1:5aa2312d3e94 284 _sce->write(0); //set CE low to begin frame
Noximilien 1:5aa2312d3e94 285
Noximilien 1:5aa2312d3e94 286 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
Noximilien 1:5aa2312d3e94 287 for(int i = 0; i < WIDTH; i++) {
Noximilien 1:5aa2312d3e94 288 _spi->write(buffer[i][j]); // send buffer
Noximilien 1:5aa2312d3e94 289 }
Noximilien 1:5aa2312d3e94 290 }
Noximilien 1:5aa2312d3e94 291 _sce->write(1); // set CE high to end frame
Noximilien 1:5aa2312d3e94 292
Noximilien 1:5aa2312d3e94 293 }
Noximilien 1:5aa2312d3e94 294
Noximilien 1:5aa2312d3e94 295 // fills the buffer with random bytes. Can be used to test the display.
Noximilien 1:5aa2312d3e94 296 // The rand() function isn't seeded so it probably creates the same pattern everytime
Noximilien 1:5aa2312d3e94 297 void N5110::randomiseBuffer()
Noximilien 1:5aa2312d3e94 298 {
Noximilien 1:5aa2312d3e94 299 int i,j;
Noximilien 1:5aa2312d3e94 300 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
Noximilien 1:5aa2312d3e94 301 for(i = 0; i < WIDTH; i++) {
Noximilien 1:5aa2312d3e94 302 buffer[i][j] = rand()%256; // generate random byte
Noximilien 1:5aa2312d3e94 303 }
Noximilien 1:5aa2312d3e94 304 }
Noximilien 1:5aa2312d3e94 305
Noximilien 1:5aa2312d3e94 306 }
Noximilien 1:5aa2312d3e94 307
Noximilien 1:5aa2312d3e94 308 // function to print 5x7 font
Noximilien 1:5aa2312d3e94 309 void N5110::printChar(char const c,
Noximilien 1:5aa2312d3e94 310 unsigned int const x,
Noximilien 1:5aa2312d3e94 311 unsigned int const y)
Noximilien 1:5aa2312d3e94 312 {
Noximilien 1:5aa2312d3e94 313 if (y<BANKS) { // check if printing in range of y banks
Noximilien 1:5aa2312d3e94 314
Noximilien 1:5aa2312d3e94 315 for (int i = 0; i < 5 ; i++ ) {
Noximilien 1:5aa2312d3e94 316 int pixel_x = x+i;
Noximilien 1:5aa2312d3e94 317 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
Noximilien 1:5aa2312d3e94 318 break;
Noximilien 1:5aa2312d3e94 319 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
Noximilien 1:5aa2312d3e94 320 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
Noximilien 1:5aa2312d3e94 321 }
Noximilien 1:5aa2312d3e94 322
Noximilien 1:5aa2312d3e94 323 }
Noximilien 1:5aa2312d3e94 324 }
Noximilien 1:5aa2312d3e94 325
Noximilien 1:5aa2312d3e94 326 // function to print string at specified position
Noximilien 1:5aa2312d3e94 327 void N5110::printString(const char *str,
Noximilien 1:5aa2312d3e94 328 unsigned int const x,
Noximilien 1:5aa2312d3e94 329 unsigned int const y)
Noximilien 1:5aa2312d3e94 330 {
Noximilien 1:5aa2312d3e94 331 if (y<BANKS) { // check if printing in range of y banks
Noximilien 1:5aa2312d3e94 332
Noximilien 1:5aa2312d3e94 333 int n = 0 ; // counter for number of characters in string
Noximilien 1:5aa2312d3e94 334 // loop through string and print character
Noximilien 1:5aa2312d3e94 335 while(*str) {
Noximilien 1:5aa2312d3e94 336
Noximilien 1:5aa2312d3e94 337 // writes the character bitmap data to the buffer, so that
Noximilien 1:5aa2312d3e94 338 // text and pixels can be displayed at the same time
Noximilien 1:5aa2312d3e94 339 for (int i = 0; i < 5 ; i++ ) {
Noximilien 1:5aa2312d3e94 340 int pixel_x = x+i+n*6;
Noximilien 1:5aa2312d3e94 341 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
Noximilien 1:5aa2312d3e94 342 break;
Noximilien 1:5aa2312d3e94 343 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
Noximilien 1:5aa2312d3e94 344 }
Noximilien 1:5aa2312d3e94 345 str++; // go to next character in string
Noximilien 1:5aa2312d3e94 346 n++; // increment index
Noximilien 1:5aa2312d3e94 347 }
Noximilien 1:5aa2312d3e94 348 }
Noximilien 1:5aa2312d3e94 349 }
Noximilien 1:5aa2312d3e94 350
Noximilien 1:5aa2312d3e94 351 // function to clear the screen buffer
Noximilien 1:5aa2312d3e94 352 void N5110::clear()
Noximilien 1:5aa2312d3e94 353 {
Noximilien 1:5aa2312d3e94 354 memset(buffer,0,sizeof(buffer));
Noximilien 1:5aa2312d3e94 355 }
Noximilien 1:5aa2312d3e94 356
Noximilien 1:5aa2312d3e94 357 // function to plot array on display
Noximilien 1:5aa2312d3e94 358 void N5110::plotArray(float const array[])
Noximilien 1:5aa2312d3e94 359 {
Noximilien 1:5aa2312d3e94 360 for (int i=0; i<WIDTH; i++) { // loop through array
Noximilien 1:5aa2312d3e94 361 // elements are normalised from 0.0 to 1.0, so multiply
Noximilien 1:5aa2312d3e94 362 // by 47 to convert to pixel range, and subtract from 47
Noximilien 1:5aa2312d3e94 363 // since top-left is 0,0 in the display geometry
Noximilien 1:5aa2312d3e94 364 setPixel(i,47 - int(array[i]*47.0f),true);
Noximilien 1:5aa2312d3e94 365 }
Noximilien 1:5aa2312d3e94 366
Noximilien 1:5aa2312d3e94 367 }
Noximilien 1:5aa2312d3e94 368
Noximilien 1:5aa2312d3e94 369 // function to draw circle
Noximilien 1:5aa2312d3e94 370 void N5110:: drawCircle(unsigned int const x0,
Noximilien 1:5aa2312d3e94 371 unsigned int const y0,
Noximilien 1:5aa2312d3e94 372 unsigned int const radius,
Noximilien 1:5aa2312d3e94 373 FillType const fill)
Noximilien 1:5aa2312d3e94 374 {
Noximilien 1:5aa2312d3e94 375 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
Noximilien 1:5aa2312d3e94 376 int x = radius;
Noximilien 1:5aa2312d3e94 377 int y = 0;
Noximilien 1:5aa2312d3e94 378 int radiusError = 1-x;
Noximilien 1:5aa2312d3e94 379
Noximilien 1:5aa2312d3e94 380 while(x >= y) {
Noximilien 1:5aa2312d3e94 381
Noximilien 1:5aa2312d3e94 382 // if transparent, just draw outline
Noximilien 1:5aa2312d3e94 383 if (fill == FILL_TRANSPARENT) {
Noximilien 1:5aa2312d3e94 384 setPixel( x + x0, y + y0,true);
Noximilien 1:5aa2312d3e94 385 setPixel(-x + x0, y + y0,true);
Noximilien 1:5aa2312d3e94 386 setPixel( y + x0, x + y0,true);
Noximilien 1:5aa2312d3e94 387 setPixel(-y + x0, x + y0,true);
Noximilien 1:5aa2312d3e94 388 setPixel(-y + x0, -x + y0,true);
Noximilien 1:5aa2312d3e94 389 setPixel( y + x0, -x + y0,true);
Noximilien 1:5aa2312d3e94 390 setPixel( x + x0, -y + y0,true);
Noximilien 1:5aa2312d3e94 391 setPixel(-x + x0, -y + y0,true);
Noximilien 1:5aa2312d3e94 392 } else { // drawing filled circle, so draw lines between points at same y value
Noximilien 1:5aa2312d3e94 393
Noximilien 1:5aa2312d3e94 394 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
Noximilien 1:5aa2312d3e94 395
Noximilien 1:5aa2312d3e94 396 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
Noximilien 1:5aa2312d3e94 397 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
Noximilien 1:5aa2312d3e94 398 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
Noximilien 1:5aa2312d3e94 399 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
Noximilien 1:5aa2312d3e94 400 }
Noximilien 1:5aa2312d3e94 401
Noximilien 1:5aa2312d3e94 402 y++;
Noximilien 1:5aa2312d3e94 403 if (radiusError<0) {
Noximilien 1:5aa2312d3e94 404 radiusError += 2 * y + 1;
Noximilien 1:5aa2312d3e94 405 } else {
Noximilien 1:5aa2312d3e94 406 x--;
Noximilien 1:5aa2312d3e94 407 radiusError += 2 * (y - x) + 1;
Noximilien 1:5aa2312d3e94 408 }
Noximilien 1:5aa2312d3e94 409 }
Noximilien 1:5aa2312d3e94 410
Noximilien 1:5aa2312d3e94 411 }
Noximilien 1:5aa2312d3e94 412
Noximilien 1:5aa2312d3e94 413 void N5110::drawLine(unsigned int const x0,
Noximilien 1:5aa2312d3e94 414 unsigned int const y0,
Noximilien 1:5aa2312d3e94 415 unsigned int const x1,
Noximilien 1:5aa2312d3e94 416 unsigned int const y1,
Noximilien 1:5aa2312d3e94 417 unsigned int const type)
Noximilien 1:5aa2312d3e94 418 {
Noximilien 1:5aa2312d3e94 419 // Note that the ranges can be negative so we have to turn the input values
Noximilien 1:5aa2312d3e94 420 // into signed integers first
Noximilien 1:5aa2312d3e94 421 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
Noximilien 1:5aa2312d3e94 422 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
Noximilien 1:5aa2312d3e94 423
Noximilien 1:5aa2312d3e94 424 // if dotted line, set step to 2, else step is 1
Noximilien 1:5aa2312d3e94 425 unsigned int const step = (type==2) ? 2:1;
Noximilien 1:5aa2312d3e94 426
Noximilien 1:5aa2312d3e94 427 // make sure we loop over the largest range to get the most pixels on the display
Noximilien 1:5aa2312d3e94 428 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
Noximilien 1:5aa2312d3e94 429 // or else we'll only end up with 1 pixel in the x column
Noximilien 1:5aa2312d3e94 430 if ( abs(x_range) > abs(y_range) ) {
Noximilien 1:5aa2312d3e94 431
Noximilien 1:5aa2312d3e94 432 // ensure we loop from smallest to largest or else for-loop won't run as expected
Noximilien 1:5aa2312d3e94 433 unsigned int const start = x_range > 0 ? x0:x1;
Noximilien 1:5aa2312d3e94 434 unsigned int const stop = x_range > 0 ? x1:x0;
Noximilien 1:5aa2312d3e94 435
Noximilien 1:5aa2312d3e94 436 // loop between x pixels
Noximilien 1:5aa2312d3e94 437 for (unsigned int x = start; x<= stop ; x+=step) {
Noximilien 1:5aa2312d3e94 438 // do linear interpolation
Noximilien 1:5aa2312d3e94 439 int const dx = static_cast<int>(x)-static_cast<int>(x0);
Noximilien 1:5aa2312d3e94 440 unsigned int const y = y0 + y_range * dx / x_range;
Noximilien 1:5aa2312d3e94 441
Noximilien 1:5aa2312d3e94 442 // If the line type is '0', this will clear the pixel
Noximilien 1:5aa2312d3e94 443 // If it is '1' or '2', the pixel will be set
Noximilien 1:5aa2312d3e94 444 setPixel(x,y, type);
Noximilien 1:5aa2312d3e94 445 }
Noximilien 1:5aa2312d3e94 446 } else {
Noximilien 1:5aa2312d3e94 447
Noximilien 1:5aa2312d3e94 448 // ensure we loop from smallest to largest or else for-loop won't run as expected
Noximilien 1:5aa2312d3e94 449 unsigned int const start = y_range > 0 ? y0:y1;
Noximilien 1:5aa2312d3e94 450 unsigned int const stop = y_range > 0 ? y1:y0;
Noximilien 1:5aa2312d3e94 451
Noximilien 1:5aa2312d3e94 452 for (unsigned int y = start; y<= stop ; y+=step) {
Noximilien 1:5aa2312d3e94 453 // do linear interpolation
Noximilien 1:5aa2312d3e94 454 int const dy = static_cast<int>(y)-static_cast<int>(y0);
Noximilien 1:5aa2312d3e94 455 unsigned int const x = x0 + x_range * dy / y_range;
Noximilien 1:5aa2312d3e94 456
Noximilien 1:5aa2312d3e94 457 // If the line type is '0', this will clear the pixel
Noximilien 1:5aa2312d3e94 458 // If it is '1' or '2', the pixel will be set
Noximilien 1:5aa2312d3e94 459 setPixel(x,y, type);
Noximilien 1:5aa2312d3e94 460 }
Noximilien 1:5aa2312d3e94 461 }
Noximilien 1:5aa2312d3e94 462
Noximilien 1:5aa2312d3e94 463 }
Noximilien 1:5aa2312d3e94 464
Noximilien 1:5aa2312d3e94 465 void N5110::drawRect(unsigned int const x0,
Noximilien 1:5aa2312d3e94 466 unsigned int const y0,
Noximilien 1:5aa2312d3e94 467 unsigned int const width,
Noximilien 1:5aa2312d3e94 468 unsigned int const height,
Noximilien 1:5aa2312d3e94 469 FillType const fill)
Noximilien 1:5aa2312d3e94 470 {
Noximilien 1:5aa2312d3e94 471 if (fill == FILL_TRANSPARENT) { // transparent, just outline
Noximilien 1:5aa2312d3e94 472 drawLine(x0,y0,x0+(width-1),y0,1); // top
Noximilien 1:5aa2312d3e94 473 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
Noximilien 1:5aa2312d3e94 474 drawLine(x0,y0,x0,y0+(height-1),1); // left
Noximilien 1:5aa2312d3e94 475 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
Noximilien 1:5aa2312d3e94 476 } else { // filled rectangle
Noximilien 1:5aa2312d3e94 477 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
Noximilien 1:5aa2312d3e94 478 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
Noximilien 1:5aa2312d3e94 479 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
Noximilien 1:5aa2312d3e94 480 }
Noximilien 1:5aa2312d3e94 481 }
Noximilien 1:5aa2312d3e94 482 }
Noximilien 1:5aa2312d3e94 483
Noximilien 1:5aa2312d3e94 484 void N5110::drawSprite(int x0,
Noximilien 1:5aa2312d3e94 485 int y0,
Noximilien 1:5aa2312d3e94 486 int nrows,
Noximilien 1:5aa2312d3e94 487 int ncols,
Noximilien 1:5aa2312d3e94 488 int *sprite)
Noximilien 1:5aa2312d3e94 489 {
Noximilien 1:5aa2312d3e94 490 for (int i = 0; i < nrows; i++) {
Noximilien 1:5aa2312d3e94 491 for (int j = 0 ; j < ncols ; j++) {
Noximilien 1:5aa2312d3e94 492
Noximilien 1:5aa2312d3e94 493 int pixel = *((sprite+i*ncols)+j);
Noximilien 1:5aa2312d3e94 494 setPixel(x0+j,y0+i, pixel);
Noximilien 1:5aa2312d3e94 495 }
Noximilien 1:5aa2312d3e94 496 }
Noximilien 9:5ad5501c702e 497 }
Noximilien 9:5ad5501c702e 498
Noximilien 9:5ad5501c702e 499 void N5110::drawSpriteOnTop(int x0,
Noximilien 9:5ad5501c702e 500 int y0,
Noximilien 9:5ad5501c702e 501 int nrows,
Noximilien 9:5ad5501c702e 502 int ncols,
Noximilien 9:5ad5501c702e 503 int *sprite)
Noximilien 9:5ad5501c702e 504 {
Noximilien 9:5ad5501c702e 505 for (int i = 0; i < nrows; i++) {
Noximilien 9:5ad5501c702e 506 for (int j = 0 ; j < ncols ; j++) {
Noximilien 9:5ad5501c702e 507
Noximilien 9:5ad5501c702e 508 int pixel = *((sprite+i*ncols)+j);
Noximilien 9:5ad5501c702e 509 if (pixel)
Noximilien 9:5ad5501c702e 510 setPixel(x0+j,y0+i, pixel);
Noximilien 9:5ad5501c702e 511 }
Noximilien 9:5ad5501c702e 512 }
Noximilien 1:5aa2312d3e94 513 }