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

Working Menu, additions to be made

Dependencies:   mbed

N5110.cpp@15:61d9a4e63b99, 23 months ago (annotated)

Committer:
jackmcgarley
Date:
Wed Aug 24 18:48:25 2022 +0000
Revision:
15:61d9a4e63b99
Parent:
0:d4d7e882c87d 
Working menu, additions to be made;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
25574069 0:d4d7e882c87d 1 #include "mbed.h"
25574069 0:d4d7e882c87d 2 #include "N5110.h"
25574069 0:d4d7e882c87d 3
25574069 0:d4d7e882c87d 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
25574069 0:d4d7e882c87d 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
25574069 0:d4d7e882c87d 6 // to power LCD. Doesn't work well with K64F.
25574069 0:d4d7e882c87d 7 N5110::N5110(PinName const pwrPin,
25574069 0:d4d7e882c87d 8 PinName const scePin,
25574069 0:d4d7e882c87d 9 PinName const rstPin,
25574069 0:d4d7e882c87d 10 PinName const dcPin,
25574069 0:d4d7e882c87d 11 PinName const mosiPin,
25574069 0:d4d7e882c87d 12 PinName const sclkPin,
25574069 0:d4d7e882c87d 13 PinName const ledPin)
25574069 0:d4d7e882c87d 14 :
25574069 0:d4d7e882c87d 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
25574069 0:d4d7e882c87d 16 _led(new PwmOut(ledPin)),
25574069 0:d4d7e882c87d 17 _pwr(new DigitalOut(pwrPin)),
25574069 0:d4d7e882c87d 18 _sce(new DigitalOut(scePin)),
25574069 0:d4d7e882c87d 19 _rst(new DigitalOut(rstPin)),
25574069 0:d4d7e882c87d 20 _dc(new DigitalOut(dcPin))
25574069 0:d4d7e882c87d 21 {}
25574069 0:d4d7e882c87d 22
25574069 0:d4d7e882c87d 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
25574069 0:d4d7e882c87d 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
25574069 0:d4d7e882c87d 25 // drive the LCD.
25574069 0:d4d7e882c87d 26 N5110::N5110(PinName const scePin,
25574069 0:d4d7e882c87d 27 PinName const rstPin,
25574069 0:d4d7e882c87d 28 PinName const dcPin,
25574069 0:d4d7e882c87d 29 PinName const mosiPin,
25574069 0:d4d7e882c87d 30 PinName const sclkPin,
25574069 0:d4d7e882c87d 31 PinName const ledPin)
25574069 0:d4d7e882c87d 32 :
25574069 0:d4d7e882c87d 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
25574069 0:d4d7e882c87d 34 _led(new PwmOut(ledPin)),
25574069 0:d4d7e882c87d 35 _pwr(NULL), // pwr not needed so null it to be safe
25574069 0:d4d7e882c87d 36 _sce(new DigitalOut(scePin)),
25574069 0:d4d7e882c87d 37 _rst(new DigitalOut(rstPin)),
25574069 0:d4d7e882c87d 38 _dc(new DigitalOut(dcPin))
25574069 0:d4d7e882c87d 39 {}
25574069 0:d4d7e882c87d 40
25574069 0:d4d7e882c87d 41 N5110::~N5110()
25574069 0:d4d7e882c87d 42 {
25574069 0:d4d7e882c87d 43 delete _spi;
25574069 0:d4d7e882c87d 44
25574069 0:d4d7e882c87d 45 if(_pwr) {
25574069 0:d4d7e882c87d 46 delete _pwr;
25574069 0:d4d7e882c87d 47 }
25574069 0:d4d7e882c87d 48
25574069 0:d4d7e882c87d 49 delete _led;
25574069 0:d4d7e882c87d 50 delete _sce;
25574069 0:d4d7e882c87d 51 delete _rst;
25574069 0:d4d7e882c87d 52 delete _dc;
25574069 0:d4d7e882c87d 53 }
25574069 0:d4d7e882c87d 54
25574069 0:d4d7e882c87d 55 // initialise function - powers up and sends the initialisation commands
25574069 0:d4d7e882c87d 56 void N5110::init()
25574069 0:d4d7e882c87d 57 {
25574069 0:d4d7e882c87d 58 turnOn(); // power up
25574069 0:d4d7e882c87d 59 wait_ms(10); // small delay seems to prevent spurious pixels during mbed reset
25574069 0:d4d7e882c87d 60 reset(); // reset LCD - must be done within 100 ms
25574069 0:d4d7e882c87d 61 // initSPI();
25574069 0:d4d7e882c87d 62
25574069 0:d4d7e882c87d 63 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
25574069 0:d4d7e882c87d 64 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
25574069 0:d4d7e882c87d 65 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
25574069 0:d4d7e882c87d 66 normalMode(); // normal video mode by default
25574069 0:d4d7e882c87d 67
25574069 0:d4d7e882c87d 68 clearRAM(); // RAM is undefined at power-up so clear to be sure
25574069 0:d4d7e882c87d 69 clear(); // clear buffer
25574069 0:d4d7e882c87d 70 setBrightness(0.5);
25574069 0:d4d7e882c87d 71 }
25574069 0:d4d7e882c87d 72
25574069 0:d4d7e882c87d 73 // sets normal video mode (black on white)
25574069 0:d4d7e882c87d 74 void N5110::normalMode()
25574069 0:d4d7e882c87d 75 {
25574069 0:d4d7e882c87d 76 sendCommand(0b00100000); // basic instruction
25574069 0:d4d7e882c87d 77 sendCommand(0b00001100); // normal video mode- datasheet
25574069 0:d4d7e882c87d 78 }
25574069 0:d4d7e882c87d 79
25574069 0:d4d7e882c87d 80 // sets normal video mode (white on black)
25574069 0:d4d7e882c87d 81 void N5110::inverseMode()
25574069 0:d4d7e882c87d 82 {
25574069 0:d4d7e882c87d 83 sendCommand(0b00100000); // basic instruction
25574069 0:d4d7e882c87d 84 sendCommand(0b00001101); // inverse video mode - datasheet
25574069 0:d4d7e882c87d 85 }
25574069 0:d4d7e882c87d 86
25574069 0:d4d7e882c87d 87 // function to power up the LCD and backlight - only works when using GPIO to power
25574069 0:d4d7e882c87d 88 void N5110::turnOn()
25574069 0:d4d7e882c87d 89 {
25574069 0:d4d7e882c87d 90 if (_pwr != NULL) {
25574069 0:d4d7e882c87d 91 _pwr->write(1); // apply power
25574069 0:d4d7e882c87d 92 }
25574069 0:d4d7e882c87d 93 }
25574069 0:d4d7e882c87d 94
25574069 0:d4d7e882c87d 95 // function to power down LCD
25574069 0:d4d7e882c87d 96 void N5110::turnOff()
25574069 0:d4d7e882c87d 97 {
25574069 0:d4d7e882c87d 98 clear(); // clear buffer
25574069 0:d4d7e882c87d 99 refresh();
25574069 0:d4d7e882c87d 100 setBrightness(0.0); // turn backlight off
25574069 0:d4d7e882c87d 101 clearRAM(); // clear RAM to ensure specified current consumption
25574069 0:d4d7e882c87d 102 // send command to ensure we are in basic mode
25574069 0:d4d7e882c87d 103
25574069 0:d4d7e882c87d 104 sendCommand(0b00100000); // basic mode
25574069 0:d4d7e882c87d 105 sendCommand(0b00001000); // clear display
25574069 0:d4d7e882c87d 106 sendCommand(0b00100001); // extended mode
25574069 0:d4d7e882c87d 107 sendCommand(0b00100100); // power down
25574069 0:d4d7e882c87d 108
25574069 0:d4d7e882c87d 109 // if we are powering the LCD using the GPIO then make it low to turn off
25574069 0:d4d7e882c87d 110 if (_pwr != NULL) {
25574069 0:d4d7e882c87d 111 wait_ms(10); // small delay and then turn off the power pin
25574069 0:d4d7e882c87d 112 _pwr->write(0); // turn off power
25574069 0:d4d7e882c87d 113 }
25574069 0:d4d7e882c87d 114
25574069 0:d4d7e882c87d 115 }
25574069 0:d4d7e882c87d 116
25574069 0:d4d7e882c87d 117 // function to change LED backlight brightness
25574069 0:d4d7e882c87d 118 void N5110::setBrightness(float brightness)
25574069 0:d4d7e882c87d 119 {
25574069 0:d4d7e882c87d 120 // check whether brightness is within range
25574069 0:d4d7e882c87d 121 if (brightness < 0.0f)
25574069 0:d4d7e882c87d 122 brightness = 0.0f;
25574069 0:d4d7e882c87d 123 if (brightness > 1.0f)
25574069 0:d4d7e882c87d 124 brightness = 1.0f;
25574069 0:d4d7e882c87d 125 // set PWM duty cycle
25574069 0:d4d7e882c87d 126 _led->write(brightness);
25574069 0:d4d7e882c87d 127 }
25574069 0:d4d7e882c87d 128
25574069 0:d4d7e882c87d 129 void N5110::setContrast(float contrast) {
25574069 0:d4d7e882c87d 130
25574069 0:d4d7e882c87d 131 // enforce limits
25574069 0:d4d7e882c87d 132 if (contrast > 1.0f)
25574069 0:d4d7e882c87d 133 contrast = 1.0f;
25574069 0:d4d7e882c87d 134 else if (contrast < 0.0f)
25574069 0:d4d7e882c87d 135 contrast = 0.0;
25574069 0:d4d7e882c87d 136
25574069 0:d4d7e882c87d 137 // convert to char in range 0 to 127 (i.e. 6 bits)
25574069 0:d4d7e882c87d 138 char ic = char(contrast*127.0f);
25574069 0:d4d7e882c87d 139
25574069 0:d4d7e882c87d 140 sendCommand(0b00100001); // extended instruction set
25574069 0:d4d7e882c87d 141 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
25574069 0:d4d7e882c87d 142 sendCommand(0b00100000); // back to basic instruction set
25574069 0:d4d7e882c87d 143 }
25574069 0:d4d7e882c87d 144
25574069 0:d4d7e882c87d 145 void N5110::setTempCoefficient(char tc) {
25574069 0:d4d7e882c87d 146
25574069 0:d4d7e882c87d 147 // enforce limits
25574069 0:d4d7e882c87d 148 if (tc>3) {
25574069 0:d4d7e882c87d 149 tc=3;
25574069 0:d4d7e882c87d 150 }
25574069 0:d4d7e882c87d 151
25574069 0:d4d7e882c87d 152 // temperature coefficient may need increasing at low temperatures
25574069 0:d4d7e882c87d 153
25574069 0:d4d7e882c87d 154 sendCommand(0b00100001); // extended instruction set
25574069 0:d4d7e882c87d 155 sendCommand(0b00000100 | tc);
25574069 0:d4d7e882c87d 156 sendCommand(0b00100000); // back to basic instruction set
25574069 0:d4d7e882c87d 157 }
25574069 0:d4d7e882c87d 158
25574069 0:d4d7e882c87d 159 void N5110::setBias(char bias) {
25574069 0:d4d7e882c87d 160
25574069 0:d4d7e882c87d 161 // from data sheet
25574069 0:d4d7e882c87d 162 // bias mux rate
25574069 0:d4d7e882c87d 163 // 0 1:100
25574069 0:d4d7e882c87d 164 // 1 1:80
25574069 0:d4d7e882c87d 165 // 2 1:65
25574069 0:d4d7e882c87d 166 // 3 1:48 (default)
25574069 0:d4d7e882c87d 167 // 4 1:40/1:34
25574069 0:d4d7e882c87d 168 // 5 1:24
25574069 0:d4d7e882c87d 169 // 6 1:18/1:16
25574069 0:d4d7e882c87d 170 // 7 1:10/1:9/1:8
25574069 0:d4d7e882c87d 171
25574069 0:d4d7e882c87d 172 // enforce limits
25574069 0:d4d7e882c87d 173 if (bias>7) {
25574069 0:d4d7e882c87d 174 bias=7;
25574069 0:d4d7e882c87d 175 }
25574069 0:d4d7e882c87d 176
25574069 0:d4d7e882c87d 177 sendCommand(0b00100001); // extended mode instruction
25574069 0:d4d7e882c87d 178 sendCommand(0b00010000 | bias);
25574069 0:d4d7e882c87d 179 sendCommand(0b00100000); // end of extended mode instruction
25574069 0:d4d7e882c87d 180 }
25574069 0:d4d7e882c87d 181
25574069 0:d4d7e882c87d 182 // pulse the active low reset line
25574069 0:d4d7e882c87d 183 void N5110::reset()
25574069 0:d4d7e882c87d 184 {
25574069 0:d4d7e882c87d 185 _rst->write(0); // reset the LCD
25574069 0:d4d7e882c87d 186 _rst->write(1);
25574069 0:d4d7e882c87d 187 }
25574069 0:d4d7e882c87d 188
25574069 0:d4d7e882c87d 189 // function to initialise SPI peripheral
25574069 0:d4d7e882c87d 190 void N5110::initSPI()
25574069 0:d4d7e882c87d 191 {
25574069 0:d4d7e882c87d 192 _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
25574069 0:d4d7e882c87d 193 _spi->frequency(4000000); // maximum of screen is 4 MHz
25574069 0:d4d7e882c87d 194 }
25574069 0:d4d7e882c87d 195
25574069 0:d4d7e882c87d 196 // send a command to the display
25574069 0:d4d7e882c87d 197 void N5110::sendCommand(unsigned char command)
25574069 0:d4d7e882c87d 198 {
25574069 0:d4d7e882c87d 199 _dc->write(0); // set DC low for command
25574069 0:d4d7e882c87d 200 _sce->write(0); // set CE low to begin frame
25574069 0:d4d7e882c87d 201 _spi->write(command); // send command
25574069 0:d4d7e882c87d 202 _dc->write(1); // turn back to data by default
25574069 0:d4d7e882c87d 203 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
25574069 0:d4d7e882c87d 204 }
25574069 0:d4d7e882c87d 205
25574069 0:d4d7e882c87d 206 // send data to the display at the current XY address
25574069 0:d4d7e882c87d 207 // dc is set to 1 (i.e. data) after sending a command and so should
25574069 0:d4d7e882c87d 208 // be the default mode.
25574069 0:d4d7e882c87d 209 void N5110::sendData(unsigned char data)
25574069 0:d4d7e882c87d 210 {
25574069 0:d4d7e882c87d 211 _sce->write(0); // set CE low to begin frame
25574069 0:d4d7e882c87d 212 _spi->write(data);
25574069 0:d4d7e882c87d 213 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
25574069 0:d4d7e882c87d 214 }
25574069 0:d4d7e882c87d 215
25574069 0:d4d7e882c87d 216 // this function writes 0 to the 504 bytes to clear the RAM
25574069 0:d4d7e882c87d 217 void N5110::clearRAM()
25574069 0:d4d7e882c87d 218 {
25574069 0:d4d7e882c87d 219 _sce->write(0); //set CE low to begin frame
25574069 0:d4d7e882c87d 220 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
25574069 0:d4d7e882c87d 221 _spi->write(0x00); // send 0's
25574069 0:d4d7e882c87d 222 }
25574069 0:d4d7e882c87d 223 _sce->write(1); // set CE high to end frame
25574069 0:d4d7e882c87d 224 }
25574069 0:d4d7e882c87d 225
25574069 0:d4d7e882c87d 226 // function to set the XY address in RAM for subsequenct data write
25574069 0:d4d7e882c87d 227 void N5110::setXYAddress(unsigned int const x,
25574069 0:d4d7e882c87d 228 unsigned int const y)
25574069 0:d4d7e882c87d 229 {
25574069 0:d4d7e882c87d 230 if (x<WIDTH && y<HEIGHT) { // check within range
25574069 0:d4d7e882c87d 231 sendCommand(0b00100000); // basic instruction
25574069 0:d4d7e882c87d 232 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
25574069 0:d4d7e882c87d 233 sendCommand(0b01000000 | y);
25574069 0:d4d7e882c87d 234 }
25574069 0:d4d7e882c87d 235 }
25574069 0:d4d7e882c87d 236
25574069 0:d4d7e882c87d 237 // These functions are used to set, clear and get the value of pixels in the display
25574069 0:d4d7e882c87d 238 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
25574069 0:d4d7e882c87d 239 // function must be called after set and clear in order to update the display
25574069 0:d4d7e882c87d 240 void N5110::setPixel(unsigned int const x,
25574069 0:d4d7e882c87d 241 unsigned int const y,
25574069 0:d4d7e882c87d 242 bool const state)
25574069 0:d4d7e882c87d 243 {
25574069 0:d4d7e882c87d 244 if (x<WIDTH && y<HEIGHT) { // check within range
25574069 0:d4d7e882c87d 245 // calculate bank and shift 1 to required position in the data byte
25574069 0:d4d7e882c87d 246 if(state) buffer[x][y/8] |= (1 << y%8);
25574069 0:d4d7e882c87d 247 else buffer[x][y/8] &= ~(1 << y%8);
25574069 0:d4d7e882c87d 248 }
25574069 0:d4d7e882c87d 249 }
25574069 0:d4d7e882c87d 250
25574069 0:d4d7e882c87d 251 void N5110::clearPixel(unsigned int const x,
25574069 0:d4d7e882c87d 252 unsigned int const y)
25574069 0:d4d7e882c87d 253 {
25574069 0:d4d7e882c87d 254 if (x<WIDTH && y<HEIGHT) { // check within range
25574069 0:d4d7e882c87d 255 // calculate bank and shift 1 to required position (using bit clear)
25574069 0:d4d7e882c87d 256 buffer[x][y/8] &= ~(1 << y%8);
25574069 0:d4d7e882c87d 257 }
25574069 0:d4d7e882c87d 258 }
25574069 0:d4d7e882c87d 259
25574069 0:d4d7e882c87d 260 int N5110::getPixel(unsigned int const x,
25574069 0:d4d7e882c87d 261 unsigned int const y) const
25574069 0:d4d7e882c87d 262 {
25574069 0:d4d7e882c87d 263 if (x<WIDTH && y<HEIGHT) { // check within range
25574069 0:d4d7e882c87d 264 // return relevant bank and mask required bit
25574069 0:d4d7e882c87d 265
25574069 0:d4d7e882c87d 266 int pixel = (int) buffer[x][y/8] & (1 << y%8);
25574069 0:d4d7e882c87d 267
25574069 0:d4d7e882c87d 268 if (pixel)
25574069 0:d4d7e882c87d 269 return 1;
25574069 0:d4d7e882c87d 270 else
25574069 0:d4d7e882c87d 271 return 0;
25574069 0:d4d7e882c87d 272 }
25574069 0:d4d7e882c87d 273
25574069 0:d4d7e882c87d 274 return 0;
25574069 0:d4d7e882c87d 275
25574069 0:d4d7e882c87d 276 }
25574069 0:d4d7e882c87d 277
25574069 0:d4d7e882c87d 278 // function to refresh the display
25574069 0:d4d7e882c87d 279 void N5110::refresh()
25574069 0:d4d7e882c87d 280 {
25574069 0:d4d7e882c87d 281 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
25574069 0:d4d7e882c87d 282 // address auto increments after printing string, so buffer[0][0] will not coincide
25574069 0:d4d7e882c87d 283 // with top-left pixel after priting string
25574069 0:d4d7e882c87d 284
25574069 0:d4d7e882c87d 285 _sce->write(0); //set CE low to begin frame
25574069 0:d4d7e882c87d 286
25574069 0:d4d7e882c87d 287 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
25574069 0:d4d7e882c87d 288 for(int i = 0; i < WIDTH; i++) {
25574069 0:d4d7e882c87d 289 _spi->write(buffer[i][j]); // send buffer
25574069 0:d4d7e882c87d 290 }
25574069 0:d4d7e882c87d 291 }
25574069 0:d4d7e882c87d 292 _sce->write(1); // set CE high to end frame
25574069 0:d4d7e882c87d 293
25574069 0:d4d7e882c87d 294 }
25574069 0:d4d7e882c87d 295
25574069 0:d4d7e882c87d 296 // fills the buffer with random bytes. Can be used to test the display.
25574069 0:d4d7e882c87d 297 // The rand() function isn't seeded so it probably creates the same pattern everytime
25574069 0:d4d7e882c87d 298 void N5110::randomiseBuffer()
25574069 0:d4d7e882c87d 299 {
25574069 0:d4d7e882c87d 300 int i,j;
25574069 0:d4d7e882c87d 301 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
25574069 0:d4d7e882c87d 302 for(i = 0; i < WIDTH; i++) {
25574069 0:d4d7e882c87d 303 buffer[i][j] = rand()%256; // generate random byte
25574069 0:d4d7e882c87d 304 }
25574069 0:d4d7e882c87d 305 }
25574069 0:d4d7e882c87d 306
25574069 0:d4d7e882c87d 307 }
25574069 0:d4d7e882c87d 308
25574069 0:d4d7e882c87d 309 // function to print 5x7 font
25574069 0:d4d7e882c87d 310 void N5110::printChar(char const c,
25574069 0:d4d7e882c87d 311 unsigned int const x,
25574069 0:d4d7e882c87d 312 unsigned int const y)
25574069 0:d4d7e882c87d 313 {
25574069 0:d4d7e882c87d 314 if (y<BANKS) { // check if printing in range of y banks
25574069 0:d4d7e882c87d 315
25574069 0:d4d7e882c87d 316 for (int i = 0; i < 5 ; i++ ) {
25574069 0:d4d7e882c87d 317 int pixel_x = x+i;
25574069 0:d4d7e882c87d 318 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
25574069 0:d4d7e882c87d 319 break;
25574069 0:d4d7e882c87d 320 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
25574069 0:d4d7e882c87d 321 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
25574069 0:d4d7e882c87d 322 }
25574069 0:d4d7e882c87d 323
25574069 0:d4d7e882c87d 324 }
25574069 0:d4d7e882c87d 325 }
25574069 0:d4d7e882c87d 326
25574069 0:d4d7e882c87d 327 // function to print string at specified position
25574069 0:d4d7e882c87d 328 void N5110::printString(const char *str,
25574069 0:d4d7e882c87d 329 unsigned int const x,
25574069 0:d4d7e882c87d 330 unsigned int const y)
25574069 0:d4d7e882c87d 331 {
25574069 0:d4d7e882c87d 332 if (y<BANKS) { // check if printing in range of y banks
25574069 0:d4d7e882c87d 333
25574069 0:d4d7e882c87d 334 int n = 0 ; // counter for number of characters in string
25574069 0:d4d7e882c87d 335 // loop through string and print character
25574069 0:d4d7e882c87d 336 while(*str) {
25574069 0:d4d7e882c87d 337
25574069 0:d4d7e882c87d 338 // writes the character bitmap data to the buffer, so that
25574069 0:d4d7e882c87d 339 // text and pixels can be displayed at the same time
25574069 0:d4d7e882c87d 340 for (int i = 0; i < 5 ; i++ ) {
25574069 0:d4d7e882c87d 341 int pixel_x = x+i+n*6;
25574069 0:d4d7e882c87d 342 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
25574069 0:d4d7e882c87d 343 break;
25574069 0:d4d7e882c87d 344 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
25574069 0:d4d7e882c87d 345 }
25574069 0:d4d7e882c87d 346 str++; // go to next character in string
25574069 0:d4d7e882c87d 347 n++; // increment index
25574069 0:d4d7e882c87d 348 }
25574069 0:d4d7e882c87d 349 }
25574069 0:d4d7e882c87d 350 }
25574069 0:d4d7e882c87d 351
25574069 0:d4d7e882c87d 352 // function to clear the screen buffer
25574069 0:d4d7e882c87d 353 void N5110::clear()
25574069 0:d4d7e882c87d 354 {
25574069 0:d4d7e882c87d 355 memset(buffer,0,sizeof(buffer));
25574069 0:d4d7e882c87d 356 }
25574069 0:d4d7e882c87d 357
25574069 0:d4d7e882c87d 358 // function to plot array on display
25574069 0:d4d7e882c87d 359 void N5110::plotArray(float const array[])
25574069 0:d4d7e882c87d 360 {
25574069 0:d4d7e882c87d 361 for (int i=0; i<WIDTH; i++) { // loop through array
25574069 0:d4d7e882c87d 362 // elements are normalised from 0.0 to 1.0, so multiply
25574069 0:d4d7e882c87d 363 // by 47 to convert to pixel range, and subtract from 47
25574069 0:d4d7e882c87d 364 // since top-left is 0,0 in the display geometry
25574069 0:d4d7e882c87d 365 setPixel(i,47 - int(array[i]*47.0f),true);
25574069 0:d4d7e882c87d 366 }
25574069 0:d4d7e882c87d 367
25574069 0:d4d7e882c87d 368 }
25574069 0:d4d7e882c87d 369
25574069 0:d4d7e882c87d 370 // function to draw circle
25574069 0:d4d7e882c87d 371 void N5110:: drawCircle(unsigned int const x0,
25574069 0:d4d7e882c87d 372 unsigned int const y0,
25574069 0:d4d7e882c87d 373 unsigned int const radius,
25574069 0:d4d7e882c87d 374 FillType const fill)
25574069 0:d4d7e882c87d 375 {
25574069 0:d4d7e882c87d 376 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
25574069 0:d4d7e882c87d 377 int x = radius;
25574069 0:d4d7e882c87d 378 int y = 0;
25574069 0:d4d7e882c87d 379 int radiusError = 1-x;
25574069 0:d4d7e882c87d 380
25574069 0:d4d7e882c87d 381 while(x >= y) {
25574069 0:d4d7e882c87d 382
25574069 0:d4d7e882c87d 383 // if transparent, just draw outline
25574069 0:d4d7e882c87d 384 if (fill == FILL_TRANSPARENT) {
25574069 0:d4d7e882c87d 385 setPixel( x + x0, y + y0,true);
25574069 0:d4d7e882c87d 386 setPixel(-x + x0, y + y0,true);
25574069 0:d4d7e882c87d 387 setPixel( y + x0, x + y0,true);
25574069 0:d4d7e882c87d 388 setPixel(-y + x0, x + y0,true);
25574069 0:d4d7e882c87d 389 setPixel(-y + x0, -x + y0,true);
25574069 0:d4d7e882c87d 390 setPixel( y + x0, -x + y0,true);
25574069 0:d4d7e882c87d 391 setPixel( x + x0, -y + y0,true);
25574069 0:d4d7e882c87d 392 setPixel(-x + x0, -y + y0,true);
25574069 0:d4d7e882c87d 393 } else { // drawing filled circle, so draw lines between points at same y value
25574069 0:d4d7e882c87d 394
25574069 0:d4d7e882c87d 395 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
25574069 0:d4d7e882c87d 396
25574069 0:d4d7e882c87d 397 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
25574069 0:d4d7e882c87d 398 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
25574069 0:d4d7e882c87d 399 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
25574069 0:d4d7e882c87d 400 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
25574069 0:d4d7e882c87d 401 }
25574069 0:d4d7e882c87d 402
25574069 0:d4d7e882c87d 403 y++;
25574069 0:d4d7e882c87d 404 if (radiusError<0) {
25574069 0:d4d7e882c87d 405 radiusError += 2 * y + 1;
25574069 0:d4d7e882c87d 406 } else {
25574069 0:d4d7e882c87d 407 x--;
25574069 0:d4d7e882c87d 408 radiusError += 2 * (y - x) + 1;
25574069 0:d4d7e882c87d 409 }
25574069 0:d4d7e882c87d 410 }
25574069 0:d4d7e882c87d 411
25574069 0:d4d7e882c87d 412 }
25574069 0:d4d7e882c87d 413
25574069 0:d4d7e882c87d 414 void N5110::drawLine(unsigned int const x0,
25574069 0:d4d7e882c87d 415 unsigned int const y0,
25574069 0:d4d7e882c87d 416 unsigned int const x1,
25574069 0:d4d7e882c87d 417 unsigned int const y1,
25574069 0:d4d7e882c87d 418 unsigned int const type)
25574069 0:d4d7e882c87d 419 {
25574069 0:d4d7e882c87d 420 // Note that the ranges can be negative so we have to turn the input values
25574069 0:d4d7e882c87d 421 // into signed integers first
25574069 0:d4d7e882c87d 422 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
25574069 0:d4d7e882c87d 423 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
25574069 0:d4d7e882c87d 424
25574069 0:d4d7e882c87d 425 // if dotted line, set step to 2, else step is 1
25574069 0:d4d7e882c87d 426 unsigned int const step = (type==2) ? 2:1;
25574069 0:d4d7e882c87d 427
25574069 0:d4d7e882c87d 428 // make sure we loop over the largest range to get the most pixels on the display
25574069 0:d4d7e882c87d 429 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
25574069 0:d4d7e882c87d 430 // or else we'll only end up with 1 pixel in the x column
25574069 0:d4d7e882c87d 431 if ( abs(x_range) > abs(y_range) ) {
25574069 0:d4d7e882c87d 432
25574069 0:d4d7e882c87d 433 // ensure we loop from smallest to largest or else for-loop won't run as expected
25574069 0:d4d7e882c87d 434 unsigned int const start = x_range > 0 ? x0:x1;
25574069 0:d4d7e882c87d 435 unsigned int const stop = x_range > 0 ? x1:x0;
25574069 0:d4d7e882c87d 436
25574069 0:d4d7e882c87d 437 // loop between x pixels
25574069 0:d4d7e882c87d 438 for (unsigned int x = start; x<= stop ; x+=step) {
25574069 0:d4d7e882c87d 439 // do linear interpolation
25574069 0:d4d7e882c87d 440 int const dx = static_cast<int>(x)-static_cast<int>(x0);
25574069 0:d4d7e882c87d 441 unsigned int const y = y0 + y_range * dx / x_range;
25574069 0:d4d7e882c87d 442
25574069 0:d4d7e882c87d 443 // If the line type is '0', this will clear the pixel
25574069 0:d4d7e882c87d 444 // If it is '1' or '2', the pixel will be set
25574069 0:d4d7e882c87d 445 setPixel(x,y, type);
25574069 0:d4d7e882c87d 446 }
25574069 0:d4d7e882c87d 447 } else {
25574069 0:d4d7e882c87d 448
25574069 0:d4d7e882c87d 449 // ensure we loop from smallest to largest or else for-loop won't run as expected
25574069 0:d4d7e882c87d 450 unsigned int const start = y_range > 0 ? y0:y1;
25574069 0:d4d7e882c87d 451 unsigned int const stop = y_range > 0 ? y1:y0;
25574069 0:d4d7e882c87d 452
25574069 0:d4d7e882c87d 453 for (unsigned int y = start; y<= stop ; y+=step) {
25574069 0:d4d7e882c87d 454 // do linear interpolation
25574069 0:d4d7e882c87d 455 int const dy = static_cast<int>(y)-static_cast<int>(y0);
25574069 0:d4d7e882c87d 456 unsigned int const x = x0 + x_range * dy / y_range;
25574069 0:d4d7e882c87d 457
25574069 0:d4d7e882c87d 458 // If the line type is '0', this will clear the pixel
25574069 0:d4d7e882c87d 459 // If it is '1' or '2', the pixel will be set
25574069 0:d4d7e882c87d 460 setPixel(x,y, type);
25574069 0:d4d7e882c87d 461 }
25574069 0:d4d7e882c87d 462 }
25574069 0:d4d7e882c87d 463
25574069 0:d4d7e882c87d 464 }
25574069 0:d4d7e882c87d 465
25574069 0:d4d7e882c87d 466 void N5110::drawRect(unsigned int const x0,
25574069 0:d4d7e882c87d 467 unsigned int const y0,
25574069 0:d4d7e882c87d 468 unsigned int const width,
25574069 0:d4d7e882c87d 469 unsigned int const height,
25574069 0:d4d7e882c87d 470 FillType const fill)
25574069 0:d4d7e882c87d 471 {
25574069 0:d4d7e882c87d 472 if (fill == FILL_TRANSPARENT) { // transparent, just outline
25574069 0:d4d7e882c87d 473 drawLine(x0,y0,x0+(width-1),y0,1); // top
25574069 0:d4d7e882c87d 474 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
25574069 0:d4d7e882c87d 475 drawLine(x0,y0,x0,y0+(height-1),1); // left
25574069 0:d4d7e882c87d 476 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
25574069 0:d4d7e882c87d 477 } else { // filled rectangle
25574069 0:d4d7e882c87d 478 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
25574069 0:d4d7e882c87d 479 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
25574069 0:d4d7e882c87d 480 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
25574069 0:d4d7e882c87d 481 }
25574069 0:d4d7e882c87d 482 }
25574069 0:d4d7e882c87d 483 }
25574069 0:d4d7e882c87d 484
25574069 0:d4d7e882c87d 485 void N5110::drawSprite(int x0,
25574069 0:d4d7e882c87d 486 int y0,
25574069 0:d4d7e882c87d 487 int nrows,
25574069 0:d4d7e882c87d 488 int ncols,
25574069 0:d4d7e882c87d 489 int *sprite)
25574069 0:d4d7e882c87d 490 {
25574069 0:d4d7e882c87d 491 for (int i = 0; i < nrows; i++) {
25574069 0:d4d7e882c87d 492 for (int j = 0 ; j < ncols ; j++) {
25574069 0:d4d7e882c87d 493
25574069 0:d4d7e882c87d 494 int pixel = *((sprite+i*ncols)+j);
25574069 0:d4d7e882c87d 495 setPixel(x0+j,y0+i, pixel);
25574069 0:d4d7e882c87d 496 }
25574069 0:d4d7e882c87d 497 }
25574069 0:d4d7e882c87d 498 }