ELEC2645 (2018/19) / Mbed 2 deprecated ml17z4c_attempt2

ZIYI CHEN ml17z4c 201214999

Dependencies:   mbed

N5110/N5110.cpp@5:f1a193bb84a2, 2019-04-25 (annotated)

Committer:
ziyi11
Date:
Thu Apr 25 03:13:24 2019 +0000
Revision:
5:f1a193bb84a2
as for the problem : L6312W: Empty Execution region description for region RW_IRAM1.; I can not download anything, so I rewrite my code quickly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ziyi11 5:f1a193bb84a2 1 #include "mbed.h"
ziyi11 5:f1a193bb84a2 2 #include "N5110.h"
ziyi11 5:f1a193bb84a2 3
ziyi11 5:f1a193bb84a2 4 // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
ziyi11 5:f1a193bb84a2 5 // this constructor works fine with LPC1768 - enough current sourced from GPIO
ziyi11 5:f1a193bb84a2 6 // to power LCD. Doesn't work well with K64F.
ziyi11 5:f1a193bb84a2 7 N5110::N5110(PinName const pwrPin,
ziyi11 5:f1a193bb84a2 8 PinName const scePin,
ziyi11 5:f1a193bb84a2 9 PinName const rstPin,
ziyi11 5:f1a193bb84a2 10 PinName const dcPin,
ziyi11 5:f1a193bb84a2 11 PinName const mosiPin,
ziyi11 5:f1a193bb84a2 12 PinName const sclkPin,
ziyi11 5:f1a193bb84a2 13 PinName const ledPin)
ziyi11 5:f1a193bb84a2 14 :
ziyi11 5:f1a193bb84a2 15 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
ziyi11 5:f1a193bb84a2 16 _led(new PwmOut(ledPin)),
ziyi11 5:f1a193bb84a2 17 _pwr(new DigitalOut(pwrPin)),
ziyi11 5:f1a193bb84a2 18 _sce(new DigitalOut(scePin)),
ziyi11 5:f1a193bb84a2 19 _rst(new DigitalOut(rstPin)),
ziyi11 5:f1a193bb84a2 20 _dc(new DigitalOut(dcPin))
ziyi11 5:f1a193bb84a2 21 {}
ziyi11 5:f1a193bb84a2 22
ziyi11 5:f1a193bb84a2 23 // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
ziyi11 5:f1a193bb84a2 24 // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
ziyi11 5:f1a193bb84a2 25 // drive the LCD.
ziyi11 5:f1a193bb84a2 26 N5110::N5110(PinName const scePin,
ziyi11 5:f1a193bb84a2 27 PinName const rstPin,
ziyi11 5:f1a193bb84a2 28 PinName const dcPin,
ziyi11 5:f1a193bb84a2 29 PinName const mosiPin,
ziyi11 5:f1a193bb84a2 30 PinName const sclkPin,
ziyi11 5:f1a193bb84a2 31 PinName const ledPin)
ziyi11 5:f1a193bb84a2 32 :
ziyi11 5:f1a193bb84a2 33 _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
ziyi11 5:f1a193bb84a2 34 _led(new PwmOut(ledPin)),
ziyi11 5:f1a193bb84a2 35 _pwr(NULL), // pwr not needed so null it to be safe
ziyi11 5:f1a193bb84a2 36 _sce(new DigitalOut(scePin)),
ziyi11 5:f1a193bb84a2 37 _rst(new DigitalOut(rstPin)),
ziyi11 5:f1a193bb84a2 38 _dc(new DigitalOut(dcPin))
ziyi11 5:f1a193bb84a2 39 {}
ziyi11 5:f1a193bb84a2 40
ziyi11 5:f1a193bb84a2 41 N5110::~N5110()
ziyi11 5:f1a193bb84a2 42 {
ziyi11 5:f1a193bb84a2 43 delete _spi;
ziyi11 5:f1a193bb84a2 44
ziyi11 5:f1a193bb84a2 45 if(_pwr) {
ziyi11 5:f1a193bb84a2 46 delete _pwr;
ziyi11 5:f1a193bb84a2 47 }
ziyi11 5:f1a193bb84a2 48
ziyi11 5:f1a193bb84a2 49 delete _led;
ziyi11 5:f1a193bb84a2 50 delete _sce;
ziyi11 5:f1a193bb84a2 51 delete _rst;
ziyi11 5:f1a193bb84a2 52 delete _dc;
ziyi11 5:f1a193bb84a2 53 }
ziyi11 5:f1a193bb84a2 54
ziyi11 5:f1a193bb84a2 55 // initialise function - powers up and sends the initialisation commands
ziyi11 5:f1a193bb84a2 56 void N5110::init()
ziyi11 5:f1a193bb84a2 57 {
ziyi11 5:f1a193bb84a2 58 turnOn(); // power up
ziyi11 5:f1a193bb84a2 59 reset(); // reset LCD - must be done within 100 ms
ziyi11 5:f1a193bb84a2 60
ziyi11 5:f1a193bb84a2 61 initSPI();
ziyi11 5:f1a193bb84a2 62 // function set - extended
ziyi11 5:f1a193bb84a2 63 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
ziyi11 5:f1a193bb84a2 64 // Don't completely understand these parameters - they seem to work as they are
ziyi11 5:f1a193bb84a2 65 // Consult the datasheet if you need to change them
ziyi11 5:f1a193bb84a2 66 sendCommand(CMD_VOP_7V38); // operating voltage - these values are from Chris Yan's Library
ziyi11 5:f1a193bb84a2 67 sendCommand(CMD_TC_TEMP_2); // temperature control
ziyi11 5:f1a193bb84a2 68 sendCommand(CMD_BI_MUX_48); // changing this can sometimes improve the contrast on some displays
ziyi11 5:f1a193bb84a2 69
ziyi11 5:f1a193bb84a2 70 // function set - basic
ziyi11 5:f1a193bb84a2 71 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
ziyi11 5:f1a193bb84a2 72 normalMode(); // normal video mode by default
ziyi11 5:f1a193bb84a2 73 sendCommand(CMD_DC_NORMAL_MODE); // black on white
ziyi11 5:f1a193bb84a2 74
ziyi11 5:f1a193bb84a2 75 clearRAM(); // RAM is undefined at power-up so clear
ziyi11 5:f1a193bb84a2 76 clear(); // clear buffer
ziyi11 5:f1a193bb84a2 77 setBrightness(0.5);
ziyi11 5:f1a193bb84a2 78 }
ziyi11 5:f1a193bb84a2 79
ziyi11 5:f1a193bb84a2 80 // sets normal video mode (black on white)
ziyi11 5:f1a193bb84a2 81 void N5110::normalMode()
ziyi11 5:f1a193bb84a2 82 {
ziyi11 5:f1a193bb84a2 83 sendCommand(CMD_DC_NORMAL_MODE);
ziyi11 5:f1a193bb84a2 84 }
ziyi11 5:f1a193bb84a2 85
ziyi11 5:f1a193bb84a2 86 // sets normal video mode (white on black)
ziyi11 5:f1a193bb84a2 87 void N5110::inverseMode()
ziyi11 5:f1a193bb84a2 88 {
ziyi11 5:f1a193bb84a2 89 sendCommand(CMD_DC_INVERT_VIDEO);
ziyi11 5:f1a193bb84a2 90 }
ziyi11 5:f1a193bb84a2 91
ziyi11 5:f1a193bb84a2 92 // function to power up the LCD and backlight - only works when using GPIO to power
ziyi11 5:f1a193bb84a2 93 void N5110::turnOn()
ziyi11 5:f1a193bb84a2 94 {
ziyi11 5:f1a193bb84a2 95 if (_pwr != NULL) {
ziyi11 5:f1a193bb84a2 96 _pwr->write(1); // apply power
ziyi11 5:f1a193bb84a2 97 }
ziyi11 5:f1a193bb84a2 98 }
ziyi11 5:f1a193bb84a2 99
ziyi11 5:f1a193bb84a2 100 // function to power down LCD
ziyi11 5:f1a193bb84a2 101 void N5110::turnOff()
ziyi11 5:f1a193bb84a2 102 {
ziyi11 5:f1a193bb84a2 103 clear(); // clear buffer
ziyi11 5:f1a193bb84a2 104 refresh();
ziyi11 5:f1a193bb84a2 105 setBrightness(0.0); // turn backlight off
ziyi11 5:f1a193bb84a2 106 clearRAM(); // clear RAM to ensure specified current consumption
ziyi11 5:f1a193bb84a2 107 // send command to ensure we are in basic mode
ziyi11 5:f1a193bb84a2 108 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
ziyi11 5:f1a193bb84a2 109 // clear the display
ziyi11 5:f1a193bb84a2 110 sendCommand(CMD_DC_CLEAR_DISPLAY);
ziyi11 5:f1a193bb84a2 111 // enter the extended mode and power down
ziyi11 5:f1a193bb84a2 112 sendCommand(0x20 | CMD_FS_POWER_DOWN_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
ziyi11 5:f1a193bb84a2 113 // small delay and then turn off the power pin
ziyi11 5:f1a193bb84a2 114 wait_ms(10);
ziyi11 5:f1a193bb84a2 115
ziyi11 5:f1a193bb84a2 116 // if we are powering the LCD using the GPIO then make it low to turn off
ziyi11 5:f1a193bb84a2 117 if (_pwr != NULL) {
ziyi11 5:f1a193bb84a2 118 _pwr->write(0); // turn off power
ziyi11 5:f1a193bb84a2 119 }
ziyi11 5:f1a193bb84a2 120
ziyi11 5:f1a193bb84a2 121 }
ziyi11 5:f1a193bb84a2 122
ziyi11 5:f1a193bb84a2 123 // function to change LED backlight brightness
ziyi11 5:f1a193bb84a2 124 void N5110::setBrightness(float brightness)
ziyi11 5:f1a193bb84a2 125 {
ziyi11 5:f1a193bb84a2 126 // check whether brightness is within range
ziyi11 5:f1a193bb84a2 127 if (brightness < 0.0f)
ziyi11 5:f1a193bb84a2 128 brightness = 0.0f;
ziyi11 5:f1a193bb84a2 129 if (brightness > 1.0f)
ziyi11 5:f1a193bb84a2 130 brightness = 1.0f;
ziyi11 5:f1a193bb84a2 131 // set PWM duty cycle
ziyi11 5:f1a193bb84a2 132 _led->write(brightness);
ziyi11 5:f1a193bb84a2 133 }
ziyi11 5:f1a193bb84a2 134
ziyi11 5:f1a193bb84a2 135
ziyi11 5:f1a193bb84a2 136 // pulse the active low reset line
ziyi11 5:f1a193bb84a2 137 void N5110::reset()
ziyi11 5:f1a193bb84a2 138 {
ziyi11 5:f1a193bb84a2 139 _rst->write(0); // reset the LCD
ziyi11 5:f1a193bb84a2 140 _rst->write(1);
ziyi11 5:f1a193bb84a2 141 }
ziyi11 5:f1a193bb84a2 142
ziyi11 5:f1a193bb84a2 143 // function to initialise SPI peripheral
ziyi11 5:f1a193bb84a2 144 void N5110::initSPI()
ziyi11 5:f1a193bb84a2 145 {
ziyi11 5:f1a193bb84a2 146 _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
ziyi11 5:f1a193bb84a2 147 _spi->frequency(4000000); // maximum of screen is 4 MHz
ziyi11 5:f1a193bb84a2 148 }
ziyi11 5:f1a193bb84a2 149
ziyi11 5:f1a193bb84a2 150 // send a command to the display
ziyi11 5:f1a193bb84a2 151 void N5110::sendCommand(unsigned char command)
ziyi11 5:f1a193bb84a2 152 {
ziyi11 5:f1a193bb84a2 153 _dc->write(0); // set DC low for command
ziyi11 5:f1a193bb84a2 154 _sce->write(0); // set CE low to begin frame
ziyi11 5:f1a193bb84a2 155 _spi->write(command); // send command
ziyi11 5:f1a193bb84a2 156 _dc->write(1); // turn back to data by default
ziyi11 5:f1a193bb84a2 157 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
ziyi11 5:f1a193bb84a2 158 }
ziyi11 5:f1a193bb84a2 159
ziyi11 5:f1a193bb84a2 160 // send data to the display at the current XY address
ziyi11 5:f1a193bb84a2 161 // dc is set to 1 (i.e. data) after sending a command and so should
ziyi11 5:f1a193bb84a2 162 // be the default mode.
ziyi11 5:f1a193bb84a2 163 void N5110::sendData(unsigned char data)
ziyi11 5:f1a193bb84a2 164 {
ziyi11 5:f1a193bb84a2 165 _sce->write(0); // set CE low to begin frame
ziyi11 5:f1a193bb84a2 166 _spi->write(data);
ziyi11 5:f1a193bb84a2 167 _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
ziyi11 5:f1a193bb84a2 168 }
ziyi11 5:f1a193bb84a2 169
ziyi11 5:f1a193bb84a2 170 // this function writes 0 to the 504 bytes to clear the RAM
ziyi11 5:f1a193bb84a2 171 void N5110::clearRAM()
ziyi11 5:f1a193bb84a2 172 {
ziyi11 5:f1a193bb84a2 173 _sce->write(0); //set CE low to begin frame
ziyi11 5:f1a193bb84a2 174 for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
ziyi11 5:f1a193bb84a2 175 _spi->write(0x00); // send 0's
ziyi11 5:f1a193bb84a2 176 }
ziyi11 5:f1a193bb84a2 177 _sce->write(1); // set CE high to end frame
ziyi11 5:f1a193bb84a2 178 }
ziyi11 5:f1a193bb84a2 179
ziyi11 5:f1a193bb84a2 180 // function to set the XY address in RAM for subsequenct data write
ziyi11 5:f1a193bb84a2 181 void N5110::setXYAddress(unsigned int const x,
ziyi11 5:f1a193bb84a2 182 unsigned int const y)
ziyi11 5:f1a193bb84a2 183 {
ziyi11 5:f1a193bb84a2 184 if (x<WIDTH && y<HEIGHT) { // check within range
ziyi11 5:f1a193bb84a2 185 sendCommand(0x80 | x); // send addresses to display with relevant mask
ziyi11 5:f1a193bb84a2 186 sendCommand(0x40 | y);
ziyi11 5:f1a193bb84a2 187 }
ziyi11 5:f1a193bb84a2 188 }
ziyi11 5:f1a193bb84a2 189
ziyi11 5:f1a193bb84a2 190 // These functions are used to set, clear and get the value of pixels in the display
ziyi11 5:f1a193bb84a2 191 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
ziyi11 5:f1a193bb84a2 192 // function must be called after set and clear in order to update the display
ziyi11 5:f1a193bb84a2 193 void N5110::setPixel(unsigned int const x,
ziyi11 5:f1a193bb84a2 194 unsigned int const y)
ziyi11 5:f1a193bb84a2 195 {
ziyi11 5:f1a193bb84a2 196 if (x<WIDTH && y<HEIGHT) { // check within range
ziyi11 5:f1a193bb84a2 197 // calculate bank and shift 1 to required position in the data byte
ziyi11 5:f1a193bb84a2 198 buffer[x][y/8] |= (1 << y%8);
ziyi11 5:f1a193bb84a2 199 }
ziyi11 5:f1a193bb84a2 200 }
ziyi11 5:f1a193bb84a2 201
ziyi11 5:f1a193bb84a2 202 void N5110::clearPixel(unsigned int const x,
ziyi11 5:f1a193bb84a2 203 unsigned int const y)
ziyi11 5:f1a193bb84a2 204 {
ziyi11 5:f1a193bb84a2 205 if (x<WIDTH && y<HEIGHT) { // check within range
ziyi11 5:f1a193bb84a2 206 // calculate bank and shift 1 to required position (using bit clear)
ziyi11 5:f1a193bb84a2 207 buffer[x][y/8] &= ~(1 << y%8);
ziyi11 5:f1a193bb84a2 208 }
ziyi11 5:f1a193bb84a2 209 }
ziyi11 5:f1a193bb84a2 210
ziyi11 5:f1a193bb84a2 211 int N5110::getPixel(unsigned int const x,
ziyi11 5:f1a193bb84a2 212 unsigned int const y) const
ziyi11 5:f1a193bb84a2 213 {
ziyi11 5:f1a193bb84a2 214 if (x<WIDTH && y<HEIGHT) { // check within range
ziyi11 5:f1a193bb84a2 215 // return relevant bank and mask required bit
ziyi11 5:f1a193bb84a2 216
ziyi11 5:f1a193bb84a2 217 int pixel = (int) buffer[x][y/8] & (1 << y%8);
ziyi11 5:f1a193bb84a2 218
ziyi11 5:f1a193bb84a2 219 if (pixel)
ziyi11 5:f1a193bb84a2 220 return 1;
ziyi11 5:f1a193bb84a2 221 else
ziyi11 5:f1a193bb84a2 222 return 0;
ziyi11 5:f1a193bb84a2 223 }
ziyi11 5:f1a193bb84a2 224
ziyi11 5:f1a193bb84a2 225 return 0;
ziyi11 5:f1a193bb84a2 226
ziyi11 5:f1a193bb84a2 227 }
ziyi11 5:f1a193bb84a2 228
ziyi11 5:f1a193bb84a2 229 // function to refresh the display
ziyi11 5:f1a193bb84a2 230 void N5110::refresh()
ziyi11 5:f1a193bb84a2 231 {
ziyi11 5:f1a193bb84a2 232 setXYAddress(0,0); // important to set address back to 0,0 before refreshing display
ziyi11 5:f1a193bb84a2 233 // address auto increments after printing string, so buffer[0][0] will not coincide
ziyi11 5:f1a193bb84a2 234 // with top-left pixel after priting string
ziyi11 5:f1a193bb84a2 235
ziyi11 5:f1a193bb84a2 236 _sce->write(0); //set CE low to begin frame
ziyi11 5:f1a193bb84a2 237
ziyi11 5:f1a193bb84a2 238 for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
ziyi11 5:f1a193bb84a2 239 for(int i = 0; i < WIDTH; i++) {
ziyi11 5:f1a193bb84a2 240 _spi->write(buffer[i][j]); // send buffer
ziyi11 5:f1a193bb84a2 241 }
ziyi11 5:f1a193bb84a2 242 }
ziyi11 5:f1a193bb84a2 243 _sce->write(1); // set CE high to end frame
ziyi11 5:f1a193bb84a2 244
ziyi11 5:f1a193bb84a2 245 }
ziyi11 5:f1a193bb84a2 246
ziyi11 5:f1a193bb84a2 247 // fills the buffer with random bytes. Can be used to test the display.
ziyi11 5:f1a193bb84a2 248 // The rand() function isn't seeded so it probably creates the same pattern everytime
ziyi11 5:f1a193bb84a2 249 void N5110::randomiseBuffer()
ziyi11 5:f1a193bb84a2 250 {
ziyi11 5:f1a193bb84a2 251 int i,j;
ziyi11 5:f1a193bb84a2 252 for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
ziyi11 5:f1a193bb84a2 253 for(i = 0; i < WIDTH; i++) {
ziyi11 5:f1a193bb84a2 254 buffer[i][j] = rand()%256; // generate random byte
ziyi11 5:f1a193bb84a2 255 }
ziyi11 5:f1a193bb84a2 256 }
ziyi11 5:f1a193bb84a2 257
ziyi11 5:f1a193bb84a2 258 }
ziyi11 5:f1a193bb84a2 259
ziyi11 5:f1a193bb84a2 260 // function to print 5x7 font
ziyi11 5:f1a193bb84a2 261 void N5110::printChar(char const c,
ziyi11 5:f1a193bb84a2 262 unsigned int const x,
ziyi11 5:f1a193bb84a2 263 unsigned int const y)
ziyi11 5:f1a193bb84a2 264 {
ziyi11 5:f1a193bb84a2 265 if (y<BANKS) { // check if printing in range of y banks
ziyi11 5:f1a193bb84a2 266
ziyi11 5:f1a193bb84a2 267 for (int i = 0; i < 5 ; i++ ) {
ziyi11 5:f1a193bb84a2 268 int pixel_x = x+i;
ziyi11 5:f1a193bb84a2 269 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
ziyi11 5:f1a193bb84a2 270 break;
ziyi11 5:f1a193bb84a2 271 buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
ziyi11 5:f1a193bb84a2 272 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
ziyi11 5:f1a193bb84a2 273 }
ziyi11 5:f1a193bb84a2 274
ziyi11 5:f1a193bb84a2 275 }
ziyi11 5:f1a193bb84a2 276 }
ziyi11 5:f1a193bb84a2 277
ziyi11 5:f1a193bb84a2 278 // function to print string at specified position
ziyi11 5:f1a193bb84a2 279 void N5110::printString(const char *str,
ziyi11 5:f1a193bb84a2 280 unsigned int const x,
ziyi11 5:f1a193bb84a2 281 unsigned int const y)
ziyi11 5:f1a193bb84a2 282 {
ziyi11 5:f1a193bb84a2 283 if (y<BANKS) { // check if printing in range of y banks
ziyi11 5:f1a193bb84a2 284
ziyi11 5:f1a193bb84a2 285 int n = 0 ; // counter for number of characters in string
ziyi11 5:f1a193bb84a2 286 // loop through string and print character
ziyi11 5:f1a193bb84a2 287 while(*str) {
ziyi11 5:f1a193bb84a2 288
ziyi11 5:f1a193bb84a2 289 // writes the character bitmap data to the buffer, so that
ziyi11 5:f1a193bb84a2 290 // text and pixels can be displayed at the same time
ziyi11 5:f1a193bb84a2 291 for (int i = 0; i < 5 ; i++ ) {
ziyi11 5:f1a193bb84a2 292 int pixel_x = x+i+n*6;
ziyi11 5:f1a193bb84a2 293 if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
ziyi11 5:f1a193bb84a2 294 break;
ziyi11 5:f1a193bb84a2 295 buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
ziyi11 5:f1a193bb84a2 296 }
ziyi11 5:f1a193bb84a2 297 str++; // go to next character in string
ziyi11 5:f1a193bb84a2 298 n++; // increment index
ziyi11 5:f1a193bb84a2 299 }
ziyi11 5:f1a193bb84a2 300 }
ziyi11 5:f1a193bb84a2 301 }
ziyi11 5:f1a193bb84a2 302
ziyi11 5:f1a193bb84a2 303 // function to clear the screen buffer
ziyi11 5:f1a193bb84a2 304 void N5110::clear()
ziyi11 5:f1a193bb84a2 305 {
ziyi11 5:f1a193bb84a2 306 memset(buffer,0,sizeof(buffer));
ziyi11 5:f1a193bb84a2 307 }
ziyi11 5:f1a193bb84a2 308
ziyi11 5:f1a193bb84a2 309 // function to plot array on display
ziyi11 5:f1a193bb84a2 310 void N5110::plotArray(float const array[])
ziyi11 5:f1a193bb84a2 311 {
ziyi11 5:f1a193bb84a2 312 for (int i=0; i<WIDTH; i++) { // loop through array
ziyi11 5:f1a193bb84a2 313 // elements are normalised from 0.0 to 1.0, so multiply
ziyi11 5:f1a193bb84a2 314 // by 47 to convert to pixel range, and subtract from 47
ziyi11 5:f1a193bb84a2 315 // since top-left is 0,0 in the display geometry
ziyi11 5:f1a193bb84a2 316 setPixel(i,47 - int(array[i]*47.0f));
ziyi11 5:f1a193bb84a2 317 }
ziyi11 5:f1a193bb84a2 318
ziyi11 5:f1a193bb84a2 319 }
ziyi11 5:f1a193bb84a2 320
ziyi11 5:f1a193bb84a2 321 // function to draw circle
ziyi11 5:f1a193bb84a2 322 void N5110:: drawCircle(unsigned int const x0,
ziyi11 5:f1a193bb84a2 323 unsigned int const y0,
ziyi11 5:f1a193bb84a2 324 unsigned int const radius,
ziyi11 5:f1a193bb84a2 325 FillType const fill)
ziyi11 5:f1a193bb84a2 326 {
ziyi11 5:f1a193bb84a2 327 // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
ziyi11 5:f1a193bb84a2 328 int x = radius;
ziyi11 5:f1a193bb84a2 329 int y = 0;
ziyi11 5:f1a193bb84a2 330 int radiusError = 1-x;
ziyi11 5:f1a193bb84a2 331
ziyi11 5:f1a193bb84a2 332 while(x >= y) {
ziyi11 5:f1a193bb84a2 333
ziyi11 5:f1a193bb84a2 334 // if transparent, just draw outline
ziyi11 5:f1a193bb84a2 335 if (fill == FILL_TRANSPARENT) {
ziyi11 5:f1a193bb84a2 336 setPixel( x + x0, y + y0);
ziyi11 5:f1a193bb84a2 337 setPixel(-x + x0, y + y0);
ziyi11 5:f1a193bb84a2 338 setPixel( y + x0, x + y0);
ziyi11 5:f1a193bb84a2 339 setPixel(-y + x0, x + y0);
ziyi11 5:f1a193bb84a2 340 setPixel(-y + x0, -x + y0);
ziyi11 5:f1a193bb84a2 341 setPixel( y + x0, -x + y0);
ziyi11 5:f1a193bb84a2 342 setPixel( x + x0, -y + y0);
ziyi11 5:f1a193bb84a2 343 setPixel(-x + x0, -y + y0);
ziyi11 5:f1a193bb84a2 344 } else { // drawing filled circle, so draw lines between points at same y value
ziyi11 5:f1a193bb84a2 345
ziyi11 5:f1a193bb84a2 346 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
ziyi11 5:f1a193bb84a2 347
ziyi11 5:f1a193bb84a2 348 drawLine(x+x0,y+y0,-x+x0,y+y0,type);
ziyi11 5:f1a193bb84a2 349 drawLine(y+x0,x+y0,-y+x0,x+y0,type);
ziyi11 5:f1a193bb84a2 350 drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
ziyi11 5:f1a193bb84a2 351 drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
ziyi11 5:f1a193bb84a2 352 }
ziyi11 5:f1a193bb84a2 353
ziyi11 5:f1a193bb84a2 354 y++;
ziyi11 5:f1a193bb84a2 355 if (radiusError<0) {
ziyi11 5:f1a193bb84a2 356 radiusError += 2 * y + 1;
ziyi11 5:f1a193bb84a2 357 } else {
ziyi11 5:f1a193bb84a2 358 x--;
ziyi11 5:f1a193bb84a2 359 radiusError += 2 * (y - x) + 1;
ziyi11 5:f1a193bb84a2 360 }
ziyi11 5:f1a193bb84a2 361 }
ziyi11 5:f1a193bb84a2 362
ziyi11 5:f1a193bb84a2 363 }
ziyi11 5:f1a193bb84a2 364
ziyi11 5:f1a193bb84a2 365 void N5110::drawLine(unsigned int const x0,
ziyi11 5:f1a193bb84a2 366 unsigned int const y0,
ziyi11 5:f1a193bb84a2 367 unsigned int const x1,
ziyi11 5:f1a193bb84a2 368 unsigned int const y1,
ziyi11 5:f1a193bb84a2 369 unsigned int const type)
ziyi11 5:f1a193bb84a2 370 {
ziyi11 5:f1a193bb84a2 371 int y_range = y1-y0; // calc range of y and x
ziyi11 5:f1a193bb84a2 372 int x_range = x1-x0;
ziyi11 5:f1a193bb84a2 373 int start,stop,step;
ziyi11 5:f1a193bb84a2 374
ziyi11 5:f1a193bb84a2 375 // if dotted line, set step to 2, else step is 1
ziyi11 5:f1a193bb84a2 376 step = (type==2) ? 2:1;
ziyi11 5:f1a193bb84a2 377
ziyi11 5:f1a193bb84a2 378 // make sure we loop over the largest range to get the most pixels on the display
ziyi11 5:f1a193bb84a2 379 // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
ziyi11 5:f1a193bb84a2 380 // or else we'll only end up with 1 pixel in the x column
ziyi11 5:f1a193bb84a2 381 if ( abs(x_range) > abs(y_range) ) {
ziyi11 5:f1a193bb84a2 382
ziyi11 5:f1a193bb84a2 383 // ensure we loop from smallest to largest or else for-loop won't run as expected
ziyi11 5:f1a193bb84a2 384 start = x1>x0 ? x0:x1;
ziyi11 5:f1a193bb84a2 385 stop = x1>x0 ? x1:x0;
ziyi11 5:f1a193bb84a2 386
ziyi11 5:f1a193bb84a2 387 // loop between x pixels
ziyi11 5:f1a193bb84a2 388 for (int x = start; x<= stop ; x+=step) {
ziyi11 5:f1a193bb84a2 389 // do linear interpolation
ziyi11 5:f1a193bb84a2 390 int y = y0 + (y1-y0)*(x-x0)/(x1-x0);
ziyi11 5:f1a193bb84a2 391
ziyi11 5:f1a193bb84a2 392 if (type == 0) // if 'white' line, turn off pixel
ziyi11 5:f1a193bb84a2 393 clearPixel(x,y);
ziyi11 5:f1a193bb84a2 394 else
ziyi11 5:f1a193bb84a2 395 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
ziyi11 5:f1a193bb84a2 396 }
ziyi11 5:f1a193bb84a2 397 } else {
ziyi11 5:f1a193bb84a2 398
ziyi11 5:f1a193bb84a2 399 // ensure we loop from smallest to largest or else for-loop won't run as expected
ziyi11 5:f1a193bb84a2 400 start = y1>y0 ? y0:y1;
ziyi11 5:f1a193bb84a2 401 stop = y1>y0 ? y1:y0;
ziyi11 5:f1a193bb84a2 402
ziyi11 5:f1a193bb84a2 403 for (int y = start; y<= stop ; y+=step) {
ziyi11 5:f1a193bb84a2 404 // do linear interpolation
ziyi11 5:f1a193bb84a2 405 int x = x0 + (x1-x0)*(y-y0)/(y1-y0);
ziyi11 5:f1a193bb84a2 406
ziyi11 5:f1a193bb84a2 407 if (type == 0) // if 'white' line, turn off pixel
ziyi11 5:f1a193bb84a2 408 clearPixel(x,y);
ziyi11 5:f1a193bb84a2 409 else
ziyi11 5:f1a193bb84a2 410 setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
ziyi11 5:f1a193bb84a2 411
ziyi11 5:f1a193bb84a2 412 }
ziyi11 5:f1a193bb84a2 413 }
ziyi11 5:f1a193bb84a2 414
ziyi11 5:f1a193bb84a2 415 }
ziyi11 5:f1a193bb84a2 416
ziyi11 5:f1a193bb84a2 417 void N5110::drawRect(unsigned int const x0,
ziyi11 5:f1a193bb84a2 418 unsigned int const y0,
ziyi11 5:f1a193bb84a2 419 unsigned int const width,
ziyi11 5:f1a193bb84a2 420 unsigned int const height,
ziyi11 5:f1a193bb84a2 421 FillType const fill)
ziyi11 5:f1a193bb84a2 422 {
ziyi11 5:f1a193bb84a2 423 if (fill == FILL_TRANSPARENT) { // transparent, just outline
ziyi11 5:f1a193bb84a2 424 drawLine(x0,y0,x0+(width-1),y0,1); // top
ziyi11 5:f1a193bb84a2 425 drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom
ziyi11 5:f1a193bb84a2 426 drawLine(x0,y0,x0,y0+(height-1),1); // left
ziyi11 5:f1a193bb84a2 427 drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right
ziyi11 5:f1a193bb84a2 428 } else { // filled rectangle
ziyi11 5:f1a193bb84a2 429 int type = (fill==FILL_BLACK) ? 1:0; // black or white fill
ziyi11 5:f1a193bb84a2 430 for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle
ziyi11 5:f1a193bb84a2 431 drawLine(x0,y,x0+(width-1),y,type); // draw line across screen
ziyi11 5:f1a193bb84a2 432 }
ziyi11 5:f1a193bb84a2 433 }
ziyi11 5:f1a193bb84a2 434 }