Mohamed Moawya / SnakeGame

test test test

Dependencies:   mbed

snake-test/ELEC2645_ProjecT/Gamepad2/N5110.cpp@0:e4c5e6ec922e, 2020-05-25 (annotated)

Committer:
mohamedmoawya
Date:
Mon May 25 19:06:11 2020 +0000
Revision:
0:e4c5e6ec922e
snake game tteest

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mohamedmoawya 0:e4c5e6ec922e 1 #include "mbed.h"
mohamedmoawya 0:e4c5e6ec922e 2 #include "N5110.h"
mohamedmoawya 0:e4c5e6ec922e 3
mohamedmoawya 0:e4c5e6ec922e 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
mohamedmoawya 0:e4c5e6ec922e 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
mohamedmoawya 0:e4c5e6ec922e 6 // to power LCD. Doesn't work well with K64F.
mohamedmoawya 0:e4c5e6ec922e 7 N5110::N5110(PinName const pwrPin,
mohamedmoawya 0:e4c5e6ec922e 8 PinName const scePin,
mohamedmoawya 0:e4c5e6ec922e 9 PinName const rstPin,
mohamedmoawya 0:e4c5e6ec922e 10 PinName const dcPin,
mohamedmoawya 0:e4c5e6ec922e 11 PinName const mosiPin,
mohamedmoawya 0:e4c5e6ec922e 12 PinName const sclkPin,
mohamedmoawya 0:e4c5e6ec922e 13 PinName const ledPin)
mohamedmoawya 0:e4c5e6ec922e 14 :
mohamedmoawya 0:e4c5e6ec922e 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
mohamedmoawya 0:e4c5e6ec922e 16 _led(new DigitalOut(ledPin)),
mohamedmoawya 0:e4c5e6ec922e 17 _pwr(new DigitalOut(pwrPin)),
mohamedmoawya 0:e4c5e6ec922e 18 _sce(new DigitalOut(scePin)),
mohamedmoawya 0:e4c5e6ec922e 19 _rst(new DigitalOut(rstPin)),
mohamedmoawya 0:e4c5e6ec922e 20 _dc(new DigitalOut(dcPin))
mohamedmoawya 0:e4c5e6ec922e 21 {}
mohamedmoawya 0:e4c5e6ec922e 22
mohamedmoawya 0:e4c5e6ec922e 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
mohamedmoawya 0:e4c5e6ec922e 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
mohamedmoawya 0:e4c5e6ec922e 25 // drive the LCD.
mohamedmoawya 0:e4c5e6ec922e 26 N5110::N5110(PinName const scePin,
mohamedmoawya 0:e4c5e6ec922e 27 PinName const rstPin,
mohamedmoawya 0:e4c5e6ec922e 28 PinName const dcPin,
mohamedmoawya 0:e4c5e6ec922e 29 PinName const mosiPin,
mohamedmoawya 0:e4c5e6ec922e 30 PinName const sclkPin,
mohamedmoawya 0:e4c5e6ec922e 31 PinName const ledPin)
mohamedmoawya 0:e4c5e6ec922e 32 :
mohamedmoawya 0:e4c5e6ec922e 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
mohamedmoawya 0:e4c5e6ec922e 34 _led(new DigitalOut(ledPin)),
mohamedmoawya 0:e4c5e6ec922e 35 _pwr(NULL), // pwr not needed so null it to be safe
mohamedmoawya 0:e4c5e6ec922e 36 _sce(new DigitalOut(scePin)),
mohamedmoawya 0:e4c5e6ec922e 37 _rst(new DigitalOut(rstPin)),
mohamedmoawya 0:e4c5e6ec922e 38 _dc(new DigitalOut(dcPin))
mohamedmoawya 0:e4c5e6ec922e 39 {}
mohamedmoawya 0:e4c5e6ec922e 40 // Second overload contructor uses the New Gamepad (Rev 2.1) pin mappings
mohamedmoawya 0:e4c5e6ec922e 41 N5110::N5110()
mohamedmoawya 0:e4c5e6ec922e 42 :
mohamedmoawya 0:e4c5e6ec922e 43 _spi(new SPI(PTD2,NC,PTD1)), // create new SPI instance and initialise
mohamedmoawya 0:e4c5e6ec922e 44 _led(new DigitalOut(PTB23)),
mohamedmoawya 0:e4c5e6ec922e 45 _pwr(NULL), // pwr not needed so null it to be safe
mohamedmoawya 0:e4c5e6ec922e 46 _sce(new DigitalOut(PTB19)),
mohamedmoawya 0:e4c5e6ec922e 47 _rst(new DigitalOut(PTC1)),
mohamedmoawya 0:e4c5e6ec922e 48 _dc(new DigitalOut(PTB18))
mohamedmoawya 0:e4c5e6ec922e 49 {}
mohamedmoawya 0:e4c5e6ec922e 50
mohamedmoawya 0:e4c5e6ec922e 51 N5110::~N5110()
mohamedmoawya 0:e4c5e6ec922e 52 {
mohamedmoawya 0:e4c5e6ec922e 53 delete _spi;
mohamedmoawya 0:e4c5e6ec922e 54
mohamedmoawya 0:e4c5e6ec922e 55 if(_pwr) {
mohamedmoawya 0:e4c5e6ec922e 56 delete _pwr;
mohamedmoawya 0:e4c5e6ec922e 57 }
mohamedmoawya 0:e4c5e6ec922e 58
mohamedmoawya 0:e4c5e6ec922e 59 delete _led;
mohamedmoawya 0:e4c5e6ec922e 60 delete _sce;
mohamedmoawya 0:e4c5e6ec922e 61 delete _rst;
mohamedmoawya 0:e4c5e6ec922e 62 delete _dc;
mohamedmoawya 0:e4c5e6ec922e 63 }
mohamedmoawya 0:e4c5e6ec922e 64
mohamedmoawya 0:e4c5e6ec922e 65 // initialise function - powers up and sends the initialisation commands
mohamedmoawya 0:e4c5e6ec922e 66 void N5110::init()
mohamedmoawya 0:e4c5e6ec922e 67 {
mohamedmoawya 0:e4c5e6ec922e 68 turnOn(); // power up
mohamedmoawya 0:e4c5e6ec922e 69 reset(); // reset LCD - must be done within 100 ms
mohamedmoawya 0:e4c5e6ec922e 70 initSPI();
mohamedmoawya 0:e4c5e6ec922e 71
mohamedmoawya 0:e4c5e6ec922e 72 backLightOn();
mohamedmoawya 0:e4c5e6ec922e 73 setContrast(0.55); // this may need tuning (say 0.4 to 0.6)
mohamedmoawya 0:e4c5e6ec922e 74 setBias(3); // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
mohamedmoawya 0:e4c5e6ec922e 75 setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
mohamedmoawya 0:e4c5e6ec922e 76 normalMode(); // normal video mode by default
mohamedmoawya 0:e4c5e6ec922e 77
mohamedmoawya 0:e4c5e6ec922e 78 clearRAM(); // RAM is undefined at power-up so clear to be sure
mohamedmoawya 0:e4c5e6ec922e 79 clear(); // clear buffer
mohamedmoawya 0:e4c5e6ec922e 80 }
mohamedmoawya 0:e4c5e6ec922e 81
mohamedmoawya 0:e4c5e6ec922e 82 // sets normal video mode (black on white)
mohamedmoawya 0:e4c5e6ec922e 83 void N5110::normalMode()
mohamedmoawya 0:e4c5e6ec922e 84 {
mohamedmoawya 0:e4c5e6ec922e 85 sendCommand(0b00100000); // basic instruction
mohamedmoawya 0:e4c5e6ec922e 86 sendCommand(0b00001100); // normal video mode- datasheet
mohamedmoawya 0:e4c5e6ec922e 87 }
mohamedmoawya 0:e4c5e6ec922e 88
mohamedmoawya 0:e4c5e6ec922e 89 // sets normal video mode (white on black)
mohamedmoawya 0:e4c5e6ec922e 90 void N5110::inverseMode()
mohamedmoawya 0:e4c5e6ec922e 91 {
mohamedmoawya 0:e4c5e6ec922e 92 sendCommand(0b00100000); // basic instruction
mohamedmoawya 0:e4c5e6ec922e 93 sendCommand(0b00001101); // inverse video mode - datasheet
mohamedmoawya 0:e4c5e6ec922e 94 }
mohamedmoawya 0:e4c5e6ec922e 95
mohamedmoawya 0:e4c5e6ec922e 96 // function to power up the LCD and backlight - only works when using GPIO to power
mohamedmoawya 0:e4c5e6ec922e 97 void N5110::turnOn()
mohamedmoawya 0:e4c5e6ec922e 98 {
mohamedmoawya 0:e4c5e6ec922e 99 if (_pwr != NULL) {
mohamedmoawya 0:e4c5e6ec922e 100 _pwr->write(1); // apply power
mohamedmoawya 0:e4c5e6ec922e 101 }
mohamedmoawya 0:e4c5e6ec922e 102 }
mohamedmoawya 0:e4c5e6ec922e 103
mohamedmoawya 0:e4c5e6ec922e 104 // function to power down LCD
mohamedmoawya 0:e4c5e6ec922e 105 void N5110::turnOff()
mohamedmoawya 0:e4c5e6ec922e 106 {
mohamedmoawya 0:e4c5e6ec922e 107 clear(); // clear buffer
mohamedmoawya 0:e4c5e6ec922e 108 refresh();
mohamedmoawya 0:e4c5e6ec922e 109 backLightOff(); // turn backlight off
mohamedmoawya 0:e4c5e6ec922e 110 clearRAM(); // clear RAM to ensure specified current consumption
mohamedmoawya 0:e4c5e6ec922e 111 // send command to ensure we are in basic mode
mohamedmoawya 0:e4c5e6ec922e 112
mohamedmoawya 0:e4c5e6ec922e 113 sendCommand(0b00100000); // basic mode
mohamedmoawya 0:e4c5e6ec922e 114 sendCommand(0b00001000); // clear display
mohamedmoawya 0:e4c5e6ec922e 115 sendCommand(0b00100001); // extended mode
mohamedmoawya 0:e4c5e6ec922e 116 sendCommand(0b00100100); // power down
mohamedmoawya 0:e4c5e6ec922e 117
mohamedmoawya 0:e4c5e6ec922e 118 // if we are powering the LCD using the GPIO then make it low to turn off
mohamedmoawya 0:e4c5e6ec922e 119 if (_pwr != NULL) {
mohamedmoawya 0:e4c5e6ec922e 120 wait_ms(10); // small delay and then turn off the power pin
mohamedmoawya 0:e4c5e6ec922e 121 _pwr->write(0); // turn off power
mohamedmoawya 0:e4c5e6ec922e 122 }
mohamedmoawya 0:e4c5e6ec922e 123
mohamedmoawya 0:e4c5e6ec922e 124 }
mohamedmoawya 0:e4c5e6ec922e 125
mohamedmoawya 0:e4c5e6ec922e 126 // function to change LED backlight brightness
mohamedmoawya 0:e4c5e6ec922e 127 void N5110::backLightOn()
mohamedmoawya 0:e4c5e6ec922e 128 {
mohamedmoawya 0:e4c5e6ec922e 129 _led->write(1);
mohamedmoawya 0:e4c5e6ec922e 130 }
mohamedmoawya 0:e4c5e6ec922e 131
mohamedmoawya 0:e4c5e6ec922e 132 // function to change LED backlight brightness
mohamedmoawya 0:e4c5e6ec922e 133 void N5110::backLightOff()
mohamedmoawya 0:e4c5e6ec922e 134 {
mohamedmoawya 0:e4c5e6ec922e 135 _led->write(0);
mohamedmoawya 0:e4c5e6ec922e 136 }
mohamedmoawya 0:e4c5e6ec922e 137
mohamedmoawya 0:e4c5e6ec922e 138 void N5110::setContrast(float contrast) {
mohamedmoawya 0:e4c5e6ec922e 139
mohamedmoawya 0:e4c5e6ec922e 140 // enforce limits
mohamedmoawya 0:e4c5e6ec922e 141 if (contrast > 1.0f)
mohamedmoawya 0:e4c5e6ec922e 142 contrast = 1.0f;
mohamedmoawya 0:e4c5e6ec922e 143 else if (contrast < 0.0f)
mohamedmoawya 0:e4c5e6ec922e 144 contrast = 0.0;
mohamedmoawya 0:e4c5e6ec922e 145
mohamedmoawya 0:e4c5e6ec922e 146 // convert to char in range 0 to 127 (i.e. 6 bits)
mohamedmoawya 0:e4c5e6ec922e 147 char ic = char(contrast*127.0f);
mohamedmoawya 0:e4c5e6ec922e 148
mohamedmoawya 0:e4c5e6ec922e 149 sendCommand(0b00100001); // extended instruction set
mohamedmoawya 0:e4c5e6ec922e 150 sendCommand(0b10000000 | ic); // set Vop (which controls contrast)
mohamedmoawya 0:e4c5e6ec922e 151 sendCommand(0b00100000); // back to basic instruction set
mohamedmoawya 0:e4c5e6ec922e 152 }
mohamedmoawya 0:e4c5e6ec922e 153
mohamedmoawya 0:e4c5e6ec922e 154 void N5110::setTempCoefficient(char tc) {
mohamedmoawya 0:e4c5e6ec922e 155
mohamedmoawya 0:e4c5e6ec922e 156 // enforce limits
mohamedmoawya 0:e4c5e6ec922e 157 if (tc>3) {
mohamedmoawya 0:e4c5e6ec922e 158 tc=3;
mohamedmoawya 0:e4c5e6ec922e 159 }
mohamedmoawya 0:e4c5e6ec922e 160
mohamedmoawya 0:e4c5e6ec922e 161 // temperature coefficient may need increasing at low temperatures
mohamedmoawya 0:e4c5e6ec922e 162
mohamedmoawya 0:e4c5e6ec922e 163 sendCommand(0b00100001); // extended instruction set
mohamedmoawya 0:e4c5e6ec922e 164 sendCommand(0b00000100 | tc);
mohamedmoawya 0:e4c5e6ec922e 165 sendCommand(0b00100000); // back to basic instruction set
mohamedmoawya 0:e4c5e6ec922e 166 }
mohamedmoawya 0:e4c5e6ec922e 167
mohamedmoawya 0:e4c5e6ec922e 168 void N5110::setBias(char bias) {
mohamedmoawya 0:e4c5e6ec922e 169
mohamedmoawya 0:e4c5e6ec922e 170 // from data sheet
mohamedmoawya 0:e4c5e6ec922e 171 // bias mux rate
mohamedmoawya 0:e4c5e6ec922e 172 // 0 1:100
mohamedmoawya 0:e4c5e6ec922e 173 // 1 1:80
mohamedmoawya 0:e4c5e6ec922e 174 // 2 1:65
mohamedmoawya 0:e4c5e6ec922e 175 // 3 1:48 (default)
mohamedmoawya 0:e4c5e6ec922e 176 // 4 1:40/1:34
mohamedmoawya 0:e4c5e6ec922e 177 // 5 1:24
mohamedmoawya 0:e4c5e6ec922e 178 // 6 1:18/1:16
mohamedmoawya 0:e4c5e6ec922e 179 // 7 1:10/1:9/1:8
mohamedmoawya 0:e4c5e6ec922e 180
mohamedmoawya 0:e4c5e6ec922e 181 // enforce limits
mohamedmoawya 0:e4c5e6ec922e 182 if (bias>7) {
mohamedmoawya 0:e4c5e6ec922e 183 bias=7;
mohamedmoawya 0:e4c5e6ec922e 184 }
mohamedmoawya 0:e4c5e6ec922e 185
mohamedmoawya 0:e4c5e6ec922e 186 sendCommand(0b00100001); // extended mode instruction
mohamedmoawya 0:e4c5e6ec922e 187 sendCommand(0b00010000 | bias);
mohamedmoawya 0:e4c5e6ec922e 188 sendCommand(0b00100000); // end of extended mode instruction
mohamedmoawya 0:e4c5e6ec922e 189 }
mohamedmoawya 0:e4c5e6ec922e 190
mohamedmoawya 0:e4c5e6ec922e 191 // pulse the active low reset line
mohamedmoawya 0:e4c5e6ec922e 192 void N5110::reset()
mohamedmoawya 0:e4c5e6ec922e 193 {
mohamedmoawya 0:e4c5e6ec922e 194 _rst->write(0); // reset the LCD
mohamedmoawya 0:e4c5e6ec922e 195 _rst->write(1);
mohamedmoawya 0:e4c5e6ec922e 196 }
mohamedmoawya 0:e4c5e6ec922e 197
mohamedmoawya 0:e4c5e6ec922e 198 // function to initialise SPI peripheral
mohamedmoawya 0:e4c5e6ec922e 199 void N5110::initSPI()
mohamedmoawya 0:e4c5e6ec922e 200 {
mohamedmoawya 0:e4c5e6ec922e 201 _spi->format(8,1); // 8 bits, Mode 1 - polarity 0, phase 1 - base value of clock is 0, data captured on falling edge/propagated on rising edge
mohamedmoawya 0:e4c5e6ec922e 202 _spi->frequency(4000000); // maximum of screen is 4 MHz
mohamedmoawya 0:e4c5e6ec922e 203 }
mohamedmoawya 0:e4c5e6ec922e 204
mohamedmoawya 0:e4c5e6ec922e 205 // send a command to the display
mohamedmoawya 0:e4c5e6ec922e 206 void N5110::sendCommand(unsigned char command)
mohamedmoawya 0:e4c5e6ec922e 207 {
mohamedmoawya 0:e4c5e6ec922e 208 _dc->write(0); // set DC low for command
mohamedmoawya 0:e4c5e6ec922e 209 _sce->write(0); // set CE low to begin frame
mohamedmoawya 0:e4c5e6ec922e 210 _spi->write(command); // send command
mohamedmoawya 0:e4c5e6ec922e 211 _dc->write(1); // turn back to data by default
mohamedmoawya 0:e4c5e6ec922e 212 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
mohamedmoawya 0:e4c5e6ec922e 213 }
mohamedmoawya 0:e4c5e6ec922e 214
mohamedmoawya 0:e4c5e6ec922e 215 // send data to the display at the current XY address
mohamedmoawya 0:e4c5e6ec922e 216 // dc is set to 1 (i.e. data) after sending a command and so should
mohamedmoawya 0:e4c5e6ec922e 217 // be the default mode.
mohamedmoawya 0:e4c5e6ec922e 218 void N5110::sendData(unsigned char data)
mohamedmoawya 0:e4c5e6ec922e 219 {
mohamedmoawya 0:e4c5e6ec922e 220 _sce->write(0); // set CE low to begin frame
mohamedmoawya 0:e4c5e6ec922e 221 _spi->write(data);
mohamedmoawya 0:e4c5e6ec922e 222 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
mohamedmoawya 0:e4c5e6ec922e 223 }
mohamedmoawya 0:e4c5e6ec922e 224
mohamedmoawya 0:e4c5e6ec922e 225 // this function writes 0 to the 504 bytes to clear the RAM
mohamedmoawya 0:e4c5e6ec922e 226 void N5110::clearRAM()
mohamedmoawya 0:e4c5e6ec922e 227 {
mohamedmoawya 0:e4c5e6ec922e 228 _sce->write(0); //set CE low to begin frame
mohamedmoawya 0:e4c5e6ec922e 229 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
mohamedmoawya 0:e4c5e6ec922e 230 _spi->write(0x00); // send 0's
mohamedmoawya 0:e4c5e6ec922e 231 }
mohamedmoawya 0:e4c5e6ec922e 232 _sce->write(1); // set CE high to end frame
mohamedmoawya 0:e4c5e6ec922e 233 }
mohamedmoawya 0:e4c5e6ec922e 234
mohamedmoawya 0:e4c5e6ec922e 235 // function to set the XY address in RAM for subsequenct data write
mohamedmoawya 0:e4c5e6ec922e 236 void N5110::setXYAddress(unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 237 unsigned int const y)
mohamedmoawya 0:e4c5e6ec922e 238 {
mohamedmoawya 0:e4c5e6ec922e 239 if (x<WIDTH && y<HEIGHT) { // check within range
mohamedmoawya 0:e4c5e6ec922e 240 sendCommand(0b00100000); // basic instruction
mohamedmoawya 0:e4c5e6ec922e 241 sendCommand(0b10000000 | x); // send addresses to display with relevant mask
mohamedmoawya 0:e4c5e6ec922e 242 sendCommand(0b01000000 | y);
mohamedmoawya 0:e4c5e6ec922e 243 }
mohamedmoawya 0:e4c5e6ec922e 244 }
mohamedmoawya 0:e4c5e6ec922e 245
mohamedmoawya 0:e4c5e6ec922e 246 // These functions are used to set, clear and get the value of pixels in the display
mohamedmoawya 0:e4c5e6ec922e 247 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
mohamedmoawya 0:e4c5e6ec922e 248 // function must be called after set and clear in order to update the display
mohamedmoawya 0:e4c5e6ec922e 249 void N5110::setPixel(unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 250 unsigned int const y,
mohamedmoawya 0:e4c5e6ec922e 251 bool const state)
mohamedmoawya 0:e4c5e6ec922e 252 {
mohamedmoawya 0:e4c5e6ec922e 253 if (x<WIDTH && y<HEIGHT) { // check within range
mohamedmoawya 0:e4c5e6ec922e 254 // calculate bank and shift 1 to required position in the data byte
mohamedmoawya 0:e4c5e6ec922e 255 if(state) buffer[x][y/8] |= (1 << y%8);
mohamedmoawya 0:e4c5e6ec922e 256 else buffer[x][y/8] &= ~(1 << y%8);
mohamedmoawya 0:e4c5e6ec922e 257 }
mohamedmoawya 0:e4c5e6ec922e 258 }
mohamedmoawya 0:e4c5e6ec922e 259
mohamedmoawya 0:e4c5e6ec922e 260 void N5110::clearPixel(unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 261 unsigned int const y)
mohamedmoawya 0:e4c5e6ec922e 262 {
mohamedmoawya 0:e4c5e6ec922e 263 if (x<WIDTH && y<HEIGHT) { // check within range
mohamedmoawya 0:e4c5e6ec922e 264 // calculate bank and shift 1 to required position (using bit clear)
mohamedmoawya 0:e4c5e6ec922e 265 buffer[x][y/8] &= ~(1 << y%8);
mohamedmoawya 0:e4c5e6ec922e 266 }
mohamedmoawya 0:e4c5e6ec922e 267 }
mohamedmoawya 0:e4c5e6ec922e 268
mohamedmoawya 0:e4c5e6ec922e 269 int N5110::getPixel(unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 270 unsigned int const y) const
mohamedmoawya 0:e4c5e6ec922e 271 {
mohamedmoawya 0:e4c5e6ec922e 272 if (x<WIDTH && y<HEIGHT) { // check within range
mohamedmoawya 0:e4c5e6ec922e 273 // return relevant bank and mask required bit
mohamedmoawya 0:e4c5e6ec922e 274
mohamedmoawya 0:e4c5e6ec922e 275 int pixel = (int) buffer[x][y/8] & (1 << y%8);
mohamedmoawya 0:e4c5e6ec922e 276
mohamedmoawya 0:e4c5e6ec922e 277 if (pixel)
mohamedmoawya 0:e4c5e6ec922e 278 return 1;
mohamedmoawya 0:e4c5e6ec922e 279 else
mohamedmoawya 0:e4c5e6ec922e 280 return 0;
mohamedmoawya 0:e4c5e6ec922e 281 }
mohamedmoawya 0:e4c5e6ec922e 282
mohamedmoawya 0:e4c5e6ec922e 283 return 0;
mohamedmoawya 0:e4c5e6ec922e 284
mohamedmoawya 0:e4c5e6ec922e 285 }
mohamedmoawya 0:e4c5e6ec922e 286
mohamedmoawya 0:e4c5e6ec922e 287 // function to refresh the display
mohamedmoawya 0:e4c5e6ec922e 288 void N5110::refresh()
mohamedmoawya 0:e4c5e6ec922e 289 {
mohamedmoawya 0:e4c5e6ec922e 290 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
mohamedmoawya 0:e4c5e6ec922e 291 // address auto increments after printing string, so buffer[0][0] will not coincide
mohamedmoawya 0:e4c5e6ec922e 292 // with top-left pixel after priting string
mohamedmoawya 0:e4c5e6ec922e 293
mohamedmoawya 0:e4c5e6ec922e 294 _sce->write(0); //set CE low to begin frame
mohamedmoawya 0:e4c5e6ec922e 295
mohamedmoawya 0:e4c5e6ec922e 296 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
mohamedmoawya 0:e4c5e6ec922e 297 for(int i = 0; i < WIDTH; i++) {
mohamedmoawya 0:e4c5e6ec922e 298 _spi->write(buffer[i][j]); // send buffer
mohamedmoawya 0:e4c5e6ec922e 299 }
mohamedmoawya 0:e4c5e6ec922e 300 }
mohamedmoawya 0:e4c5e6ec922e 301 _sce->write(1); // set CE high to end frame
mohamedmoawya 0:e4c5e6ec922e 302
mohamedmoawya 0:e4c5e6ec922e 303 }
mohamedmoawya 0:e4c5e6ec922e 304
mohamedmoawya 0:e4c5e6ec922e 305 // fills the buffer with random bytes. Can be used to test the display.
mohamedmoawya 0:e4c5e6ec922e 306 // The rand() function isn't seeded so it probably creates the same pattern everytime
mohamedmoawya 0:e4c5e6ec922e 307 void N5110::randomiseBuffer()
mohamedmoawya 0:e4c5e6ec922e 308 {
mohamedmoawya 0:e4c5e6ec922e 309 int i,j;
mohamedmoawya 0:e4c5e6ec922e 310 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
mohamedmoawya 0:e4c5e6ec922e 311 for(i = 0; i < WIDTH; i++) {
mohamedmoawya 0:e4c5e6ec922e 312 buffer[i][j] = rand()%256; // generate random byte
mohamedmoawya 0:e4c5e6ec922e 313 }
mohamedmoawya 0:e4c5e6ec922e 314 }
mohamedmoawya 0:e4c5e6ec922e 315
mohamedmoawya 0:e4c5e6ec922e 316 }
mohamedmoawya 0:e4c5e6ec922e 317
mohamedmoawya 0:e4c5e6ec922e 318 // function to print 5x7 font
mohamedmoawya 0:e4c5e6ec922e 319 void N5110::printChar(char const c,
mohamedmoawya 0:e4c5e6ec922e 320 unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 321 unsigned int const y)
mohamedmoawya 0:e4c5e6ec922e 322 {
mohamedmoawya 0:e4c5e6ec922e 323 if (y<BANKS) { // check if printing in range of y banks
mohamedmoawya 0:e4c5e6ec922e 324
mohamedmoawya 0:e4c5e6ec922e 325 for (int i = 0; i < 5 ; i++ ) {
mohamedmoawya 0:e4c5e6ec922e 326 int pixel_x = x+i;
mohamedmoawya 0:e4c5e6ec922e 327 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
mohamedmoawya 0:e4c5e6ec922e 328 break;
mohamedmoawya 0:e4c5e6ec922e 329 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
mohamedmoawya 0:e4c5e6ec922e 330 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
mohamedmoawya 0:e4c5e6ec922e 331 }
mohamedmoawya 0:e4c5e6ec922e 332
mohamedmoawya 0:e4c5e6ec922e 333 }
mohamedmoawya 0:e4c5e6ec922e 334 }
mohamedmoawya 0:e4c5e6ec922e 335
mohamedmoawya 0:e4c5e6ec922e 336 // function to print string at specified position
mohamedmoawya 0:e4c5e6ec922e 337 void N5110::printString(const char *str,
mohamedmoawya 0:e4c5e6ec922e 338 unsigned int const x,
mohamedmoawya 0:e4c5e6ec922e 339 unsigned int const y)
mohamedmoawya 0:e4c5e6ec922e 340 {
mohamedmoawya 0:e4c5e6ec922e 341 if (y<BANKS) { // check if printing in range of y banks
mohamedmoawya 0:e4c5e6ec922e 342
mohamedmoawya 0:e4c5e6ec922e 343 int n = 0 ; // counter for number of characters in string
mohamedmoawya 0:e4c5e6ec922e 344 // loop through string and print character
mohamedmoawya 0:e4c5e6ec922e 345 while(*str) {
mohamedmoawya 0:e4c5e6ec922e 346
mohamedmoawya 0:e4c5e6ec922e 347 // writes the character bitmap data to the buffer, so that
mohamedmoawya 0:e4c5e6ec922e 348 // text and pixels can be displayed at the same time
mohamedmoawya 0:e4c5e6ec922e 349 for (int i = 0; i < 5 ; i++ ) {
mohamedmoawya 0:e4c5e6ec922e 350 int pixel_x = x+i+n*6;
mohamedmoawya 0:e4c5e6ec922e 351 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
mohamedmoawya 0:e4c5e6ec922e 352 break;
mohamedmoawya 0:e4c5e6ec922e 353 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
mohamedmoawya 0:e4c5e6ec922e 354 }
mohamedmoawya 0:e4c5e6ec922e 355 str++; // go to next character in string
mohamedmoawya 0:e4c5e6ec922e 356 n++; // increment index
mohamedmoawya 0:e4c5e6ec922e 357 }
mohamedmoawya 0:e4c5e6ec922e 358 }
mohamedmoawya 0:e4c5e6ec922e 359 }
mohamedmoawya 0:e4c5e6ec922e 360
mohamedmoawya 0:e4c5e6ec922e 361 // function to clear the screen buffer
mohamedmoawya 0:e4c5e6ec922e 362 void N5110::clear()
mohamedmoawya 0:e4c5e6ec922e 363 {
mohamedmoawya 0:e4c5e6ec922e 364 memset(buffer,0,sizeof(buffer));
mohamedmoawya 0:e4c5e6ec922e 365 }
mohamedmoawya 0:e4c5e6ec922e 366
mohamedmoawya 0:e4c5e6ec922e 367 // function to plot array on display
mohamedmoawya 0:e4c5e6ec922e 368 void N5110::plotArray(float const array[])
mohamedmoawya 0:e4c5e6ec922e 369 {
mohamedmoawya 0:e4c5e6ec922e 370 for (int i=0; i<WIDTH; i++) { // loop through array
mohamedmoawya 0:e4c5e6ec922e 371 // elements are normalised from 0.0 to 1.0, so multiply
mohamedmoawya 0:e4c5e6ec922e 372 // by 47 to convert to pixel range, and subtract from 47
mohamedmoawya 0:e4c5e6ec922e 373 // since top-left is 0,0 in the display geometry
mohamedmoawya 0:e4c5e6ec922e 374 setPixel(i,47 - int(array[i]*47.0f),true);
mohamedmoawya 0:e4c5e6ec922e 375 }
mohamedmoawya 0:e4c5e6ec922e 376
mohamedmoawya 0:e4c5e6ec922e 377 }
mohamedmoawya 0:e4c5e6ec922e 378
mohamedmoawya 0:e4c5e6ec922e 379 // function to draw circle
mohamedmoawya 0:e4c5e6ec922e 380 void N5110:: drawCircle(unsigned int const x0,
mohamedmoawya 0:e4c5e6ec922e 381 unsigned int const y0,
mohamedmoawya 0:e4c5e6ec922e 382 unsigned int const radius,
mohamedmoawya 0:e4c5e6ec922e 383 FillType const fill)
mohamedmoawya 0:e4c5e6ec922e 384 {
mohamedmoawya 0:e4c5e6ec922e 385 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
mohamedmoawya 0:e4c5e6ec922e 386 int x = radius;
mohamedmoawya 0:e4c5e6ec922e 387 int y = 0;
mohamedmoawya 0:e4c5e6ec922e 388 int radiusError = 1-x;
mohamedmoawya 0:e4c5e6ec922e 389
mohamedmoawya 0:e4c5e6ec922e 390 while(x >= y) {
mohamedmoawya 0:e4c5e6ec922e 391
mohamedmoawya 0:e4c5e6ec922e 392 // if transparent, just draw outline
mohamedmoawya 0:e4c5e6ec922e 393 if (fill == FILL_TRANSPARENT) {
mohamedmoawya 0:e4c5e6ec922e 394 setPixel( x + x0, y + y0,true);
mohamedmoawya 0:e4c5e6ec922e 395 setPixel(-x + x0, y + y0,true);
mohamedmoawya 0:e4c5e6ec922e 396 setPixel( y + x0, x + y0,true);
mohamedmoawya 0:e4c5e6ec922e 397 setPixel(-y + x0, x + y0,true);
mohamedmoawya 0:e4c5e6ec922e 398 setPixel(-y + x0, -x + y0,true);
mohamedmoawya 0:e4c5e6ec922e 399 setPixel( y + x0, -x + y0,true);
mohamedmoawya 0:e4c5e6ec922e 400 setPixel( x + x0, -y + y0,true);
mohamedmoawya 0:e4c5e6ec922e 401 setPixel(-x + x0, -y + y0,true);
mohamedmoawya 0:e4c5e6ec922e 402 } else { // drawing filled circle, so draw lines between points at same y value
mohamedmoawya 0:e4c5e6ec922e 403
mohamedmoawya 0:e4c5e6ec922e 404 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
mohamedmoawya 0:e4c5e6ec922e 405
mohamedmoawya 0:e4c5e6ec922e 406 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
mohamedmoawya 0:e4c5e6ec922e 407 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
mohamedmoawya 0:e4c5e6ec922e 408 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
mohamedmoawya 0:e4c5e6ec922e 409 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
mohamedmoawya 0:e4c5e6ec922e 410 }
mohamedmoawya 0:e4c5e6ec922e 411
mohamedmoawya 0:e4c5e6ec922e 412 y++;
mohamedmoawya 0:e4c5e6ec922e 413 if (radiusError<0) {
mohamedmoawya 0:e4c5e6ec922e 414 radiusError += 2 * y + 1;
mohamedmoawya 0:e4c5e6ec922e 415 } else {
mohamedmoawya 0:e4c5e6ec922e 416 x--;
mohamedmoawya 0:e4c5e6ec922e 417 radiusError += 2 * (y - x) + 1;
mohamedmoawya 0:e4c5e6ec922e 418 }
mohamedmoawya 0:e4c5e6ec922e 419 }
mohamedmoawya 0:e4c5e6ec922e 420
mohamedmoawya 0:e4c5e6ec922e 421 }
mohamedmoawya 0:e4c5e6ec922e 422
mohamedmoawya 0:e4c5e6ec922e 423 void N5110::drawLine(unsigned int const x0,
mohamedmoawya 0:e4c5e6ec922e 424 unsigned int const y0,
mohamedmoawya 0:e4c5e6ec922e 425 unsigned int const x1,
mohamedmoawya 0:e4c5e6ec922e 426 unsigned int const y1,
mohamedmoawya 0:e4c5e6ec922e 427 unsigned int const type)
mohamedmoawya 0:e4c5e6ec922e 428 {
mohamedmoawya 0:e4c5e6ec922e 429 // Note that the ranges can be negative so we have to turn the input values
mohamedmoawya 0:e4c5e6ec922e 430 // into signed integers first
mohamedmoawya 0:e4c5e6ec922e 431 int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
mohamedmoawya 0:e4c5e6ec922e 432 int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
mohamedmoawya 0:e4c5e6ec922e 433
mohamedmoawya 0:e4c5e6ec922e 434 // if dotted line, set step to 2, else step is 1
mohamedmoawya 0:e4c5e6ec922e 435 unsigned int const step = (type==2) ? 2:1;
mohamedmoawya 0:e4c5e6ec922e 436
mohamedmoawya 0:e4c5e6ec922e 437 // make sure we loop over the largest range to get the most pixels on the display
mohamedmoawya 0:e4c5e6ec922e 438 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
mohamedmoawya 0:e4c5e6ec922e 439 // or else we'll only end up with 1 pixel in the x column
mohamedmoawya 0:e4c5e6ec922e 440 if ( abs(x_range) > abs(y_range) ) {
mohamedmoawya 0:e4c5e6ec922e 441
mohamedmoawya 0:e4c5e6ec922e 442 // ensure we loop from smallest to largest or else for-loop won't run as expected
mohamedmoawya 0:e4c5e6ec922e 443 unsigned int const start = x_range > 0 ? x0:x1;
mohamedmoawya 0:e4c5e6ec922e 444 unsigned int const stop = x_range > 0 ? x1:x0;
mohamedmoawya 0:e4c5e6ec922e 445
mohamedmoawya 0:e4c5e6ec922e 446 // loop between x pixels
mohamedmoawya 0:e4c5e6ec922e 447 for (unsigned int x = start; x<= stop ; x+=step) {
mohamedmoawya 0:e4c5e6ec922e 448 // do linear interpolation
mohamedmoawya 0:e4c5e6ec922e 449 int const dx = static_cast<int>(x)-static_cast<int>(x0);
mohamedmoawya 0:e4c5e6ec922e 450 unsigned int const y = y0 + y_range * dx / x_range;
mohamedmoawya 0:e4c5e6ec922e 451
mohamedmoawya 0:e4c5e6ec922e 452 // If the line type is '0', this will clear the pixel
mohamedmoawya 0:e4c5e6ec922e 453 // If it is '1' or '2', the pixel will be set
mohamedmoawya 0:e4c5e6ec922e 454 setPixel(x,y, type);
mohamedmoawya 0:e4c5e6ec922e 455 }
mohamedmoawya 0:e4c5e6ec922e 456 } else {
mohamedmoawya 0:e4c5e6ec922e 457
mohamedmoawya 0:e4c5e6ec922e 458 // ensure we loop from smallest to largest or else for-loop won't run as expected
mohamedmoawya 0:e4c5e6ec922e 459 unsigned int const start = y_range > 0 ? y0:y1;
mohamedmoawya 0:e4c5e6ec922e 460 unsigned int const stop = y_range > 0 ? y1:y0;
mohamedmoawya 0:e4c5e6ec922e 461
mohamedmoawya 0:e4c5e6ec922e 462 for (unsigned int y = start; y<= stop ; y+=step) {
mohamedmoawya 0:e4c5e6ec922e 463 // do linear interpolation
mohamedmoawya 0:e4c5e6ec922e 464 int const dy = static_cast<int>(y)-static_cast<int>(y0);
mohamedmoawya 0:e4c5e6ec922e 465 unsigned int const x = x0 + x_range * dy / y_range;
mohamedmoawya 0:e4c5e6ec922e 466
mohamedmoawya 0:e4c5e6ec922e 467 // If the line type is '0', this will clear the pixel
mohamedmoawya 0:e4c5e6ec922e 468 // If it is '1' or '2', the pixel will be set
mohamedmoawya 0:e4c5e6ec922e 469 setPixel(x,y, type);
mohamedmoawya 0:e4c5e6ec922e 470 }
mohamedmoawya 0:e4c5e6ec922e 471 }
mohamedmoawya 0:e4c5e6ec922e 472
mohamedmoawya 0:e4c5e6ec922e 473 }
mohamedmoawya 0:e4c5e6ec922e 474
mohamedmoawya 0:e4c5e6ec922e 475 void N5110::drawRect(unsigned int const x0,
mohamedmoawya 0:e4c5e6ec922e 476 unsigned int const y0,
mohamedmoawya 0:e4c5e6ec922e 477 unsigned int const width,
mohamedmoawya 0:e4c5e6ec922e 478 unsigned int const height,
mohamedmoawya 0:e4c5e6ec922e 479 FillType const fill)
mohamedmoawya 0:e4c5e6ec922e 480 {
mohamedmoawya 0:e4c5e6ec922e 481 if (fill == FILL_TRANSPARENT) { // transparent, just outline
mohamedmoawya 0:e4c5e6ec922e 482 drawLine(x0,y0,x0+(width-1),y0,1); // top
mohamedmoawya 0:e4c5e6ec922e 483 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
mohamedmoawya 0:e4c5e6ec922e 484 drawLine(x0,y0,x0,y0+(height-1),1); // left
mohamedmoawya 0:e4c5e6ec922e 485 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
mohamedmoawya 0:e4c5e6ec922e 486 } else { // filled rectangle
mohamedmoawya 0:e4c5e6ec922e 487 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
mohamedmoawya 0:e4c5e6ec922e 488 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
mohamedmoawya 0:e4c5e6ec922e 489 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
mohamedmoawya 0:e4c5e6ec922e 490 }
mohamedmoawya 0:e4c5e6ec922e 491 }
mohamedmoawya 0:e4c5e6ec922e 492 }
mohamedmoawya 0:e4c5e6ec922e 493
mohamedmoawya 0:e4c5e6ec922e 494 void N5110::drawSprite(int x0,
mohamedmoawya 0:e4c5e6ec922e 495 int y0,
mohamedmoawya 0:e4c5e6ec922e 496 int nrows,
mohamedmoawya 0:e4c5e6ec922e 497 int ncols,
mohamedmoawya 0:e4c5e6ec922e 498 int *sprite)
mohamedmoawya 0:e4c5e6ec922e 499 {
mohamedmoawya 0:e4c5e6ec922e 500 for (int i = 0; i < nrows; i++) {
mohamedmoawya 0:e4c5e6ec922e 501 for (int j = 0 ; j < ncols ; j++) {
mohamedmoawya 0:e4c5e6ec922e 502
mohamedmoawya 0:e4c5e6ec922e 503 int pixel = *((sprite+i*ncols)+j);
mohamedmoawya 0:e4c5e6ec922e 504 setPixel(x0+j,y0+i, pixel);
mohamedmoawya 0:e4c5e6ec922e 505 }
mohamedmoawya 0:e4c5e6ec922e 506 }
mohamedmoawya 0:e4c5e6ec922e 507 }