harry rance / Mbed 2 deprecated Revised_Space_Invaders

Harry Rance 200925395 Embedded Systems Project

Dependencies:   mbed

N5110.cpp@7:569f3fc70ac5, 2017-05-03 (annotated)

Committer:
harryrance
Date:
Wed May 03 16:33:20 2017 +0000
Revision:
7:569f3fc70ac5
Parent:
5:2eb139b24219 
Committed with full documentation generated.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
harryrance 0:c9bf674fe0c7 1 #include "mbed.h"
harryrance 0:c9bf674fe0c7 2 #include "N5110.h"
harryrance 0:c9bf674fe0c7 3
harryrance 0:c9bf674fe0c7 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
harryrance 0:c9bf674fe0c7 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
harryrance 0:c9bf674fe0c7 6 // to power LCD. Doesn't work well with K64F.
harryrance 0:c9bf674fe0c7 7 N5110::N5110(PinName pwrPin, PinName scePin, PinName rstPin, PinName dcPin, PinName mosiPin, PinName sclkPin, PinName ledPin)
harryrance 0:c9bf674fe0c7 8 {
harryrance 0:c9bf674fe0c7 9 spi = new SPI(mosiPin,NC,sclkPin); // create new SPI instance and initialise
harryrance 0:c9bf674fe0c7 10 // set up pins as required
harryrance 0:c9bf674fe0c7 11 led = new PwmOut(ledPin);
harryrance 0:c9bf674fe0c7 12 pwr = new DigitalOut(pwrPin);
harryrance 0:c9bf674fe0c7 13 sce = new DigitalOut(scePin);
harryrance 0:c9bf674fe0c7 14 rst = new DigitalOut(rstPin);
harryrance 0:c9bf674fe0c7 15 dc = new DigitalOut(dcPin);
harryrance 0:c9bf674fe0c7 16 }
harryrance 0:c9bf674fe0c7 17
harryrance 0:c9bf674fe0c7 18 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
harryrance 0:c9bf674fe0c7 19 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
harryrance 0:c9bf674fe0c7 20 // drive the LCD.
harryrance 0:c9bf674fe0c7 21 N5110::N5110(PinName scePin, PinName rstPin, PinName dcPin, PinName mosiPin, PinName sclkPin, PinName ledPin)
harryrance 0:c9bf674fe0c7 22 {
harryrance 0:c9bf674fe0c7 23 spi = new SPI(mosiPin,NC,sclkPin); // create new SPI instance and initialise
harryrance 0:c9bf674fe0c7 24 // set up pins as required
harryrance 0:c9bf674fe0c7 25 pwr = NULL; // pwr not needed so null it to be safe
harryrance 0:c9bf674fe0c7 26 led = new PwmOut(ledPin);
harryrance 0:c9bf674fe0c7 27 sce = new DigitalOut(scePin);
harryrance 0:c9bf674fe0c7 28 rst = new DigitalOut(rstPin);
harryrance 0:c9bf674fe0c7 29 dc = new DigitalOut(dcPin);
harryrance 0:c9bf674fe0c7 30 }
harryrance 0:c9bf674fe0c7 31
harryrance 0:c9bf674fe0c7 32 // initialise function - powers up and sends the initialisation commands
harryrance 0:c9bf674fe0c7 33 void N5110::init()
harryrance 0:c9bf674fe0c7 34 {
harryrance 0:c9bf674fe0c7 35 turnOn(); // power up
harryrance 0:c9bf674fe0c7 36 reset(); // reset LCD - must be done within 100 ms
harryrance 0:c9bf674fe0c7 37
harryrance 0:c9bf674fe0c7 38 initSPI();
harryrance 0:c9bf674fe0c7 39 // function set - extended
harryrance 0:c9bf674fe0c7 40 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
harryrance 0:c9bf674fe0c7 41 // Don't completely understand these parameters - they seem to work as they are
harryrance 0:c9bf674fe0c7 42 // Consult the datasheet if you need to change them
harryrance 0:c9bf674fe0c7 43 sendCommand(CMD_VOP_7V38); // operating voltage - these values are from Chris Yan's Library
harryrance 0:c9bf674fe0c7 44 sendCommand(CMD_TC_TEMP_2); // temperature control
harryrance 0:c9bf674fe0c7 45 sendCommand(CMD_BI_MUX_48); // changing this can sometimes improve the contrast on some displays
harryrance 0:c9bf674fe0c7 46
harryrance 0:c9bf674fe0c7 47 // function set - basic
harryrance 0:c9bf674fe0c7 48 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
harryrance 0:c9bf674fe0c7 49 normalMode(); // normal video mode by default
harryrance 0:c9bf674fe0c7 50 sendCommand(CMD_DC_NORMAL_MODE); // black on white
harryrance 0:c9bf674fe0c7 51
harryrance 0:c9bf674fe0c7 52 clearRAM(); // RAM is undefined at power-up so clear
harryrance 0:c9bf674fe0c7 53 clear(); // clear buffer
harryrance 0:c9bf674fe0c7 54 setBrightness(0.5);
harryrance 0:c9bf674fe0c7 55 }
harryrance 0:c9bf674fe0c7 56
harryrance 0:c9bf674fe0c7 57 // sets normal video mode (black on white)
harryrance 0:c9bf674fe0c7 58 void N5110::normalMode()
harryrance 0:c9bf674fe0c7 59 {
harryrance 0:c9bf674fe0c7 60 sendCommand(CMD_DC_NORMAL_MODE);
harryrance 0:c9bf674fe0c7 61 }
harryrance 0:c9bf674fe0c7 62
harryrance 0:c9bf674fe0c7 63 // sets normal video mode (white on black)
harryrance 0:c9bf674fe0c7 64 void N5110::inverseMode()
harryrance 0:c9bf674fe0c7 65 {
harryrance 0:c9bf674fe0c7 66 sendCommand(CMD_DC_INVERT_VIDEO);
harryrance 0:c9bf674fe0c7 67 }
harryrance 0:c9bf674fe0c7 68
harryrance 0:c9bf674fe0c7 69 // function to power up the LCD and backlight - only works when using GPIO to power
harryrance 0:c9bf674fe0c7 70 void N5110::turnOn()
harryrance 0:c9bf674fe0c7 71 {
harryrance 0:c9bf674fe0c7 72 if (pwr != NULL) {
harryrance 0:c9bf674fe0c7 73 pwr->write(1); // apply power
harryrance 0:c9bf674fe0c7 74 }
harryrance 0:c9bf674fe0c7 75 }
harryrance 0:c9bf674fe0c7 76
harryrance 0:c9bf674fe0c7 77 // function to power down LCD
harryrance 0:c9bf674fe0c7 78 void N5110::turnOff()
harryrance 0:c9bf674fe0c7 79 {
harryrance 0:c9bf674fe0c7 80 clear(); // clear buffer
harryrance 0:c9bf674fe0c7 81 refresh();
harryrance 0:c9bf674fe0c7 82 setBrightness(0.0); // turn backlight off
harryrance 0:c9bf674fe0c7 83 clearRAM(); // clear RAM to ensure specified current consumption
harryrance 0:c9bf674fe0c7 84 // send command to ensure we are in basic mode
harryrance 0:c9bf674fe0c7 85 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
harryrance 0:c9bf674fe0c7 86 // clear the display
harryrance 0:c9bf674fe0c7 87 sendCommand(CMD_DC_CLEAR_DISPLAY);
harryrance 0:c9bf674fe0c7 88 // enter the extended mode and power down
harryrance 0:c9bf674fe0c7 89 sendCommand(0x20 | CMD_FS_POWER_DOWN_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
harryrance 0:c9bf674fe0c7 90 // small delay and then turn off the power pin
harryrance 0:c9bf674fe0c7 91 wait_ms(10);
harryrance 0:c9bf674fe0c7 92
harryrance 0:c9bf674fe0c7 93 // if we are powering the LCD using the GPIO then make it low to turn off
harryrance 0:c9bf674fe0c7 94 if (pwr != NULL) {
harryrance 0:c9bf674fe0c7 95 pwr->write(0); // turn off power
harryrance 0:c9bf674fe0c7 96 }
harryrance 0:c9bf674fe0c7 97
harryrance 0:c9bf674fe0c7 98 }
harryrance 0:c9bf674fe0c7 99
harryrance 0:c9bf674fe0c7 100 // function to change LED backlight brightness
harryrance 0:c9bf674fe0c7 101 void N5110::setBrightness(float brightness)
harryrance 0:c9bf674fe0c7 102 {
harryrance 0:c9bf674fe0c7 103 // check whether brightness is within range
harryrance 0:c9bf674fe0c7 104 if (brightness < 0.0f)
harryrance 0:c9bf674fe0c7 105 brightness = 0.0f;
harryrance 0:c9bf674fe0c7 106 if (brightness > 1.0f)
harryrance 0:c9bf674fe0c7 107 brightness = 1.0f;
harryrance 0:c9bf674fe0c7 108 // set PWM duty cycle
harryrance 0:c9bf674fe0c7 109 led->write(brightness);
harryrance 0:c9bf674fe0c7 110 }
harryrance 0:c9bf674fe0c7 111
harryrance 0:c9bf674fe0c7 112
harryrance 0:c9bf674fe0c7 113 // pulse the active low reset line
harryrance 0:c9bf674fe0c7 114 void N5110::reset()
harryrance 0:c9bf674fe0c7 115 {
harryrance 0:c9bf674fe0c7 116 rst->write(0); // reset the LCD
harryrance 0:c9bf674fe0c7 117 rst->write(1);
harryrance 0:c9bf674fe0c7 118 }
harryrance 0:c9bf674fe0c7 119
harryrance 0:c9bf674fe0c7 120 // function to initialise SPI peripheral
harryrance 0:c9bf674fe0c7 121 void N5110::initSPI()
harryrance 0:c9bf674fe0c7 122 {
harryrance 0:c9bf674fe0c7 123 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
harryrance 0:c9bf674fe0c7 124 spi->frequency(4000000); // maximum of screen is 4 MHz
harryrance 0:c9bf674fe0c7 125 }
harryrance 0:c9bf674fe0c7 126
harryrance 0:c9bf674fe0c7 127 // send a command to the display
harryrance 0:c9bf674fe0c7 128 void N5110::sendCommand(unsigned char command)
harryrance 0:c9bf674fe0c7 129 {
harryrance 0:c9bf674fe0c7 130 dc->write(0); // set DC low for command
harryrance 0:c9bf674fe0c7 131 sce->write(0); // set CE low to begin frame
harryrance 0:c9bf674fe0c7 132 spi->write(command); // send command
harryrance 0:c9bf674fe0c7 133 dc->write(1); // turn back to data by default
harryrance 0:c9bf674fe0c7 134 sce->write(1); // set CE high to end frame (expected for transmission of single byte)
harryrance 0:c9bf674fe0c7 135
harryrance 0:c9bf674fe0c7 136 }
harryrance 0:c9bf674fe0c7 137
harryrance 0:c9bf674fe0c7 138 // send data to the display at the current XY address
harryrance 0:c9bf674fe0c7 139 // dc is set to 1 (i.e. data) after sending a command and so should
harryrance 0:c9bf674fe0c7 140 // be the default mode.
harryrance 0:c9bf674fe0c7 141 void N5110::sendData(unsigned char data)
harryrance 0:c9bf674fe0c7 142 {
harryrance 0:c9bf674fe0c7 143 sce->write(0); // set CE low to begin frame
harryrance 0:c9bf674fe0c7 144 spi->write(data);
harryrance 0:c9bf674fe0c7 145 sce->write(1); // set CE high to end frame (expected for transmission of single byte)
harryrance 0:c9bf674fe0c7 146 }
harryrance 0:c9bf674fe0c7 147
harryrance 0:c9bf674fe0c7 148 // this function writes 0 to the 504 bytes to clear the RAM
harryrance 0:c9bf674fe0c7 149 void N5110::clearRAM()
harryrance 0:c9bf674fe0c7 150 {
harryrance 0:c9bf674fe0c7 151 sce->write(0); //set CE low to begin frame
harryrance 0:c9bf674fe0c7 152 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
harryrance 0:c9bf674fe0c7 153 spi->write(0x00); // send 0's
harryrance 0:c9bf674fe0c7 154 }
harryrance 0:c9bf674fe0c7 155 sce->write(1); // set CE high to end frame
harryrance 0:c9bf674fe0c7 156
harryrance 0:c9bf674fe0c7 157 }
harryrance 0:c9bf674fe0c7 158
harryrance 0:c9bf674fe0c7 159 // function to set the XY address in RAM for subsequenct data write
harryrance 0:c9bf674fe0c7 160 void N5110::setXYAddress(int x, int y)
harryrance 0:c9bf674fe0c7 161 {
harryrance 0:c9bf674fe0c7 162 if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
harryrance 0:c9bf674fe0c7 163 sendCommand(0x80 | x); // send addresses to display with relevant mask
harryrance 0:c9bf674fe0c7 164 sendCommand(0x40 | y);
harryrance 0:c9bf674fe0c7 165 }
harryrance 0:c9bf674fe0c7 166 }
harryrance 0:c9bf674fe0c7 167
harryrance 0:c9bf674fe0c7 168 // These functions are used to set, clear and get the value of pixels in the display
harryrance 0:c9bf674fe0c7 169 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
harryrance 0:c9bf674fe0c7 170 // function must be called after set and clear in order to update the display
harryrance 0:c9bf674fe0c7 171 void N5110::setPixel(int x, int y)
harryrance 0:c9bf674fe0c7 172 {
harryrance 0:c9bf674fe0c7 173 if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
harryrance 0:c9bf674fe0c7 174 // calculate bank and shift 1 to required position in the data byte
harryrance 0:c9bf674fe0c7 175 buffer[x][y/8] |= (1 << y%8);
harryrance 0:c9bf674fe0c7 176 }
harryrance 0:c9bf674fe0c7 177 }
harryrance 0:c9bf674fe0c7 178
harryrance 0:c9bf674fe0c7 179 void N5110::clearPixel(int x, int y)
harryrance 0:c9bf674fe0c7 180 {
harryrance 0:c9bf674fe0c7 181 if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
harryrance 0:c9bf674fe0c7 182 // calculate bank and shift 1 to required position (using bit clear)
harryrance 0:c9bf674fe0c7 183 buffer[x][y/8] &= ~(1 << y%8);
harryrance 0:c9bf674fe0c7 184 }
harryrance 0:c9bf674fe0c7 185 }
harryrance 0:c9bf674fe0c7 186
harryrance 0:c9bf674fe0c7 187 int N5110::getPixel(int x, int y)
harryrance 0:c9bf674fe0c7 188 {
harryrance 0:c9bf674fe0c7 189 if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
harryrance 0:c9bf674fe0c7 190 // return relevant bank and mask required bit
harryrance 0:c9bf674fe0c7 191
harryrance 0:c9bf674fe0c7 192 int pixel = (int) buffer[x][y/8] & (1 << y%8);
harryrance 0:c9bf674fe0c7 193
harryrance 0:c9bf674fe0c7 194 if (pixel)
harryrance 0:c9bf674fe0c7 195 return 1;
harryrance 0:c9bf674fe0c7 196 else
harryrance 0:c9bf674fe0c7 197 return 0;
harryrance 0:c9bf674fe0c7 198 }
harryrance 0:c9bf674fe0c7 199
harryrance 0:c9bf674fe0c7 200 return 0;
harryrance 0:c9bf674fe0c7 201
harryrance 0:c9bf674fe0c7 202 }
harryrance 0:c9bf674fe0c7 203
harryrance 0:c9bf674fe0c7 204 // function to refresh the display
harryrance 0:c9bf674fe0c7 205 void N5110::refresh()
harryrance 0:c9bf674fe0c7 206 {
harryrance 0:c9bf674fe0c7 207 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
harryrance 0:c9bf674fe0c7 208 // address auto increments after printing string, so buffer[0][0] will not coincide
harryrance 0:c9bf674fe0c7 209 // with top-left pixel after priting string
harryrance 0:c9bf674fe0c7 210
harryrance 0:c9bf674fe0c7 211 sce->write(0); //set CE low to begin frame
harryrance 0:c9bf674fe0c7 212
harryrance 0:c9bf674fe0c7 213 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
harryrance 0:c9bf674fe0c7 214 for(int i = 0; i < WIDTH; i++) {
harryrance 0:c9bf674fe0c7 215 spi->write(buffer[i][j]); // send buffer
harryrance 0:c9bf674fe0c7 216 }
harryrance 0:c9bf674fe0c7 217 }
harryrance 0:c9bf674fe0c7 218 sce->write(1); // set CE high to end frame
harryrance 0:c9bf674fe0c7 219
harryrance 0:c9bf674fe0c7 220 }
harryrance 0:c9bf674fe0c7 221
harryrance 0:c9bf674fe0c7 222 // fills the buffer with random bytes. Can be used to test the display.
harryrance 0:c9bf674fe0c7 223 // The rand() function isn't seeded so it probably creates the same pattern everytime
harryrance 0:c9bf674fe0c7 224 void N5110::randomiseBuffer()
harryrance 0:c9bf674fe0c7 225 {
harryrance 0:c9bf674fe0c7 226 int i,j;
harryrance 0:c9bf674fe0c7 227 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
harryrance 0:c9bf674fe0c7 228 for(i = 0; i < WIDTH; i++) {
harryrance 0:c9bf674fe0c7 229 buffer[i][j] = rand()%256; // generate random byte
harryrance 0:c9bf674fe0c7 230 }
harryrance 0:c9bf674fe0c7 231 }
harryrance 0:c9bf674fe0c7 232
harryrance 0:c9bf674fe0c7 233 }
harryrance 0:c9bf674fe0c7 234
harryrance 0:c9bf674fe0c7 235 // function to print 5x7 font
harryrance 0:c9bf674fe0c7 236 void N5110::printChar(char c,int x,int y)
harryrance 0:c9bf674fe0c7 237 {
harryrance 0:c9bf674fe0c7 238 if (y>=0 && y<BANKS) { // check if printing in range of y banks
harryrance 0:c9bf674fe0c7 239
harryrance 0:c9bf674fe0c7 240 for (int i = 0; i < 5 ; i++ ) {
harryrance 0:c9bf674fe0c7 241 int pixel_x = x+i;
harryrance 0:c9bf674fe0c7 242 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
harryrance 0:c9bf674fe0c7 243 break;
harryrance 0:c9bf674fe0c7 244 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
harryrance 0:c9bf674fe0c7 245 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
harryrance 0:c9bf674fe0c7 246 }
harryrance 5:2eb139b24219 247
harryrance 0:c9bf674fe0c7 248 }
harryrance 0:c9bf674fe0c7 249 }
harryrance 0:c9bf674fe0c7 250
harryrance 0:c9bf674fe0c7 251 // function to print string at specified position
harryrance 0:c9bf674fe0c7 252 void N5110::printString(const char * str,int x,int y)
harryrance 0:c9bf674fe0c7 253 {
harryrance 0:c9bf674fe0c7 254 if (y>=0 && y<BANKS) { // check if printing in range of y banks
harryrance 0:c9bf674fe0c7 255
harryrance 0:c9bf674fe0c7 256 int n = 0 ; // counter for number of characters in string
harryrance 0:c9bf674fe0c7 257 // loop through string and print character
harryrance 0:c9bf674fe0c7 258 while(*str) {
harryrance 0:c9bf674fe0c7 259
harryrance 0:c9bf674fe0c7 260 // writes the character bitmap data to the buffer, so that
harryrance 0:c9bf674fe0c7 261 // text and pixels can be displayed at the same time
harryrance 0:c9bf674fe0c7 262 for (int i = 0; i < 5 ; i++ ) {
harryrance 0:c9bf674fe0c7 263 int pixel_x = x+i+n*6;
harryrance 0:c9bf674fe0c7 264 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
harryrance 0:c9bf674fe0c7 265 break;
harryrance 0:c9bf674fe0c7 266 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
harryrance 0:c9bf674fe0c7 267 }
harryrance 0:c9bf674fe0c7 268 str++; // go to next character in string
harryrance 0:c9bf674fe0c7 269 n++; // increment index
harryrance 0:c9bf674fe0c7 270 }
harryrance 0:c9bf674fe0c7 271 }
harryrance 0:c9bf674fe0c7 272 }
harryrance 0:c9bf674fe0c7 273
harryrance 0:c9bf674fe0c7 274 // function to clear the screen buffer
harryrance 0:c9bf674fe0c7 275 void N5110::clear()
harryrance 0:c9bf674fe0c7 276 {
harryrance 0:c9bf674fe0c7 277 memset(buffer,0,sizeof(buffer));
harryrance 0:c9bf674fe0c7 278 }
harryrance 0:c9bf674fe0c7 279
harryrance 0:c9bf674fe0c7 280 // function to plot array on display
harryrance 0:c9bf674fe0c7 281 void N5110::plotArray(float array[])
harryrance 0:c9bf674fe0c7 282 {
harryrance 0:c9bf674fe0c7 283 for (int i=0; i<WIDTH; i++) { // loop through array
harryrance 0:c9bf674fe0c7 284 // elements are normalised from 0.0 to 1.0, so multiply
harryrance 0:c9bf674fe0c7 285 // by 47 to convert to pixel range, and subtract from 47
harryrance 0:c9bf674fe0c7 286 // since top-left is 0,0 in the display geometry
harryrance 0:c9bf674fe0c7 287 setPixel(i,47 - int(array[i]*47.0f));
harryrance 0:c9bf674fe0c7 288 }
harryrance 0:c9bf674fe0c7 289
harryrance 0:c9bf674fe0c7 290 }
harryrance 0:c9bf674fe0c7 291
harryrance 0:c9bf674fe0c7 292 // function to draw circle
harryrance 0:c9bf674fe0c7 293 void N5110:: drawCircle(int x0,int y0,int radius,int fill)
harryrance 0:c9bf674fe0c7 294 {
harryrance 0:c9bf674fe0c7 295 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
harryrance 0:c9bf674fe0c7 296 int x = radius;
harryrance 0:c9bf674fe0c7 297 int y = 0;
harryrance 0:c9bf674fe0c7 298 int radiusError = 1-x;
harryrance 0:c9bf674fe0c7 299
harryrance 0:c9bf674fe0c7 300 while(x >= y) {
harryrance 0:c9bf674fe0c7 301
harryrance 0:c9bf674fe0c7 302 // if transparent, just draw outline
harryrance 0:c9bf674fe0c7 303 if (fill == 0) {
harryrance 0:c9bf674fe0c7 304 setPixel( x + x0, y + y0);
harryrance 0:c9bf674fe0c7 305 setPixel(-x + x0, y + y0);
harryrance 0:c9bf674fe0c7 306 setPixel( y + x0, x + y0);
harryrance 0:c9bf674fe0c7 307 setPixel(-y + x0, x + y0);
harryrance 0:c9bf674fe0c7 308 setPixel(-y + x0, -x + y0);
harryrance 0:c9bf674fe0c7 309 setPixel( y + x0, -x + y0);
harryrance 0:c9bf674fe0c7 310 setPixel( x + x0, -y + y0);
harryrance 0:c9bf674fe0c7 311 setPixel(-x + x0, -y + y0);
harryrance 0:c9bf674fe0c7 312 } else { // drawing filled circle, so draw lines between points at same y value
harryrance 0:c9bf674fe0c7 313
harryrance 0:c9bf674fe0c7 314 int type = (fill==1) ? 1:0; // black or white fill
harryrance 0:c9bf674fe0c7 315
harryrance 0:c9bf674fe0c7 316 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
harryrance 0:c9bf674fe0c7 317 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
harryrance 0:c9bf674fe0c7 318 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
harryrance 0:c9bf674fe0c7 319 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
harryrance 0:c9bf674fe0c7 320 }
harryrance 0:c9bf674fe0c7 321
harryrance 0:c9bf674fe0c7 322 y++;
harryrance 0:c9bf674fe0c7 323 if (radiusError<0) {
harryrance 0:c9bf674fe0c7 324 radiusError += 2 * y + 1;
harryrance 0:c9bf674fe0c7 325 } else {
harryrance 0:c9bf674fe0c7 326 x--;
harryrance 0:c9bf674fe0c7 327 radiusError += 2 * (y - x) + 1;
harryrance 0:c9bf674fe0c7 328 }
harryrance 0:c9bf674fe0c7 329 }
harryrance 0:c9bf674fe0c7 330
harryrance 0:c9bf674fe0c7 331 }
harryrance 0:c9bf674fe0c7 332
harryrance 0:c9bf674fe0c7 333 void N5110::drawLine(int x0,int y0,int x1,int y1,int type)
harryrance 0:c9bf674fe0c7 334 {
harryrance 0:c9bf674fe0c7 335 int y_range = y1-y0; // calc range of y and x
harryrance 0:c9bf674fe0c7 336 int x_range = x1-x0;
harryrance 0:c9bf674fe0c7 337 int start,stop,step;
harryrance 0:c9bf674fe0c7 338
harryrance 0:c9bf674fe0c7 339 // if dotted line, set step to 2, else step is 1
harryrance 0:c9bf674fe0c7 340 step = (type==2) ? 2:1;
harryrance 0:c9bf674fe0c7 341
harryrance 0:c9bf674fe0c7 342 // make sure we loop over the largest range to get the most pixels on the display
harryrance 0:c9bf674fe0c7 343 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
harryrance 0:c9bf674fe0c7 344 // or else we'll only end up with 1 pixel in the x column
harryrance 0:c9bf674fe0c7 345 if ( abs(x_range) > abs(y_range) ) {
harryrance 0:c9bf674fe0c7 346
harryrance 0:c9bf674fe0c7 347 // ensure we loop from smallest to largest or else for-loop won't run as expected
harryrance 0:c9bf674fe0c7 348 start = x1>x0 ? x0:x1;
harryrance 0:c9bf674fe0c7 349 stop = x1>x0 ? x1:x0;
harryrance 0:c9bf674fe0c7 350
harryrance 0:c9bf674fe0c7 351 // loop between x pixels
harryrance 0:c9bf674fe0c7 352 for (int x = start; x<= stop ; x+=step) {
harryrance 0:c9bf674fe0c7 353 // do linear interpolation
harryrance 0:c9bf674fe0c7 354 int y = y0 + (y1-y0)*(x-x0)/(x1-x0);
harryrance 0:c9bf674fe0c7 355
harryrance 0:c9bf674fe0c7 356 if (type == 0) // if 'white' line, turn off pixel
harryrance 0:c9bf674fe0c7 357 clearPixel(x,y);
harryrance 0:c9bf674fe0c7 358 else
harryrance 0:c9bf674fe0c7 359 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
harryrance 0:c9bf674fe0c7 360 }
harryrance 0:c9bf674fe0c7 361 } else {
harryrance 0:c9bf674fe0c7 362
harryrance 0:c9bf674fe0c7 363 // ensure we loop from smallest to largest or else for-loop won't run as expected
harryrance 0:c9bf674fe0c7 364 start = y1>y0 ? y0:y1;
harryrance 0:c9bf674fe0c7 365 stop = y1>y0 ? y1:y0;
harryrance 0:c9bf674fe0c7 366
harryrance 0:c9bf674fe0c7 367 for (int y = start; y<= stop ; y+=step) {
harryrance 0:c9bf674fe0c7 368 // do linear interpolation
harryrance 0:c9bf674fe0c7 369 int x = x0 + (x1-x0)*(y-y0)/(y1-y0);
harryrance 0:c9bf674fe0c7 370
harryrance 0:c9bf674fe0c7 371 if (type == 0) // if 'white' line, turn off pixel
harryrance 0:c9bf674fe0c7 372 clearPixel(x,y);
harryrance 0:c9bf674fe0c7 373 else
harryrance 0:c9bf674fe0c7 374 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
harryrance 0:c9bf674fe0c7 375
harryrance 0:c9bf674fe0c7 376 }
harryrance 0:c9bf674fe0c7 377 }
harryrance 0:c9bf674fe0c7 378
harryrance 0:c9bf674fe0c7 379 }
harryrance 0:c9bf674fe0c7 380
harryrance 0:c9bf674fe0c7 381 void N5110::drawRect(int x0,int y0,int width,int height,int fill)
harryrance 0:c9bf674fe0c7 382 {
harryrance 0:c9bf674fe0c7 383 if (fill == 0) { // transparent, just outline
harryrance 0:c9bf674fe0c7 384 drawLine(x0,y0,x0+(width-1),y0,1); // top
harryrance 0:c9bf674fe0c7 385 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
harryrance 0:c9bf674fe0c7 386 drawLine(x0,y0,x0,y0+(height-1),1); // left
harryrance 0:c9bf674fe0c7 387 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
harryrance 0:c9bf674fe0c7 388 } else { // filled rectangle
harryrance 0:c9bf674fe0c7 389 int type = (fill==1) ? 1:0; // black or white fill
harryrance 0:c9bf674fe0c7 390 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
harryrance 0:c9bf674fe0c7 391 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
harryrance 0:c9bf674fe0c7 392 }
harryrance 0:c9bf674fe0c7 393 }
harryrance 0:c9bf674fe0c7 394 }
harryrance 0:c9bf674fe0c7 395