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N5110.cpp@42:596c207519de, 2017-03-21 (annotated)
- Committer:
- valavanisalex
- Date:
- Tue Mar 21 10:43:19 2017 +0000
- Revision:
- 42:596c207519de
- Parent:
- 36:00ebd449b6f3
- Child:
- 43:c2598020fcac
setPixel() now accepts a state parameter. clearPixel() deprecated
Who changed what in which revision?
| User | Revision | Line number | New contents of line | 
|---|---|---|---|
| eencae | 0:d563e74f0ae9 | 1 | #include "mbed.h" | 
| eencae | 0:d563e74f0ae9 | 2 | #include "N5110.h" | 
| eencae | 0:d563e74f0ae9 | 3 | |
| eencae | 21:4cbdc20fea9f | 4 | // overloaded constructor includes power pin - LCD Vcc connected to GPIO pin | 
| eencae | 21:4cbdc20fea9f | 5 | // this constructor works fine with LPC1768 - enough current sourced from GPIO | 
| eencae | 21:4cbdc20fea9f | 6 | // to power LCD. Doesn't work well with K64F. | 
| valavanisalex | 29:5bc91bd44c77 | 7 | N5110::N5110(PinName const pwrPin, | 
| valavanisalex | 29:5bc91bd44c77 | 8 | PinName const scePin, | 
| valavanisalex | 29:5bc91bd44c77 | 9 | PinName const rstPin, | 
| valavanisalex | 29:5bc91bd44c77 | 10 | PinName const dcPin, | 
| valavanisalex | 29:5bc91bd44c77 | 11 | PinName const mosiPin, | 
| valavanisalex | 29:5bc91bd44c77 | 12 | PinName const sclkPin, | 
| valavanisalex | 29:5bc91bd44c77 | 13 | PinName const ledPin) | 
| valavanisalex | 32:c9643726edca | 14 | : | 
| valavanisalex | 32:c9643726edca | 15 | _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise | 
| valavanisalex | 32:c9643726edca | 16 | _led(new PwmOut(ledPin)), | 
| valavanisalex | 32:c9643726edca | 17 | _pwr(new DigitalOut(pwrPin)), | 
| valavanisalex | 32:c9643726edca | 18 | _sce(new DigitalOut(scePin)), | 
| valavanisalex | 32:c9643726edca | 19 | _rst(new DigitalOut(rstPin)), | 
| valavanisalex | 32:c9643726edca | 20 | _dc(new DigitalOut(dcPin)) | 
| valavanisalex | 32:c9643726edca | 21 | {} | 
| eencae | 0:d563e74f0ae9 | 22 | |
| eencae | 21:4cbdc20fea9f | 23 | // overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3 | 
| eencae | 21:4cbdc20fea9f | 24 | // Best to use this with K64F as the GPIO hasn't sufficient output current to reliably | 
| eencae | 21:4cbdc20fea9f | 25 | // drive the LCD. | 
| valavanisalex | 29:5bc91bd44c77 | 26 | N5110::N5110(PinName const scePin, | 
| valavanisalex | 29:5bc91bd44c77 | 27 | PinName const rstPin, | 
| valavanisalex | 29:5bc91bd44c77 | 28 | PinName const dcPin, | 
| valavanisalex | 29:5bc91bd44c77 | 29 | PinName const mosiPin, | 
| valavanisalex | 29:5bc91bd44c77 | 30 | PinName const sclkPin, | 
| valavanisalex | 29:5bc91bd44c77 | 31 | PinName const ledPin) | 
| valavanisalex | 32:c9643726edca | 32 | : | 
| valavanisalex | 32:c9643726edca | 33 | _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise | 
| valavanisalex | 32:c9643726edca | 34 | _led(new PwmOut(ledPin)), | 
| valavanisalex | 32:c9643726edca | 35 | _pwr(NULL), // pwr not needed so null it to be safe | 
| valavanisalex | 32:c9643726edca | 36 | _sce(new DigitalOut(scePin)), | 
| valavanisalex | 32:c9643726edca | 37 | _rst(new DigitalOut(rstPin)), | 
| valavanisalex | 32:c9643726edca | 38 | _dc(new DigitalOut(dcPin)) | 
| valavanisalex | 32:c9643726edca | 39 | {} | 
| eencae | 21:4cbdc20fea9f | 40 | |
| valavanisalex | 31:8a0c21042f82 | 41 | N5110::~N5110() | 
| valavanisalex | 31:8a0c21042f82 | 42 | { | 
| valavanisalex | 31:8a0c21042f82 | 43 | delete _spi; | 
| valavanisalex | 31:8a0c21042f82 | 44 | |
| valavanisalex | 31:8a0c21042f82 | 45 | if(_pwr) { | 
| valavanisalex | 31:8a0c21042f82 | 46 | delete _pwr; | 
| valavanisalex | 31:8a0c21042f82 | 47 | } | 
| valavanisalex | 31:8a0c21042f82 | 48 | |
| valavanisalex | 31:8a0c21042f82 | 49 | delete _led; | 
| valavanisalex | 31:8a0c21042f82 | 50 | delete _sce; | 
| valavanisalex | 31:8a0c21042f82 | 51 | delete _rst; | 
| valavanisalex | 31:8a0c21042f82 | 52 | delete _dc; | 
| valavanisalex | 31:8a0c21042f82 | 53 | } | 
| valavanisalex | 31:8a0c21042f82 | 54 | |
| eencae | 6:adb79338d40f | 55 | // initialise function - powers up and sends the initialisation commands | 
| eencae | 0:d563e74f0ae9 | 56 | void N5110::init() | 
| eencae | 0:d563e74f0ae9 | 57 | { | 
| eencae | 24:342bdb6679a1 | 58 | turnOn(); // power up | 
| eencae | 24:342bdb6679a1 | 59 | reset(); // reset LCD - must be done within 100 ms | 
| eencae | 0:d563e74f0ae9 | 60 | |
| eencae | 24:342bdb6679a1 | 61 | initSPI(); | 
| eencae | 24:342bdb6679a1 | 62 | // function set - extended | 
| eencae | 24:342bdb6679a1 | 63 | sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE); | 
| eencae | 24:342bdb6679a1 | 64 | // Don't completely understand these parameters - they seem to work as they are | 
| eencae | 24:342bdb6679a1 | 65 | // Consult the datasheet if you need to change them | 
| eencae | 24:342bdb6679a1 | 66 | sendCommand(CMD_VOP_7V38); // operating voltage - these values are from Chris Yan's Library | 
| eencae | 24:342bdb6679a1 | 67 | sendCommand(CMD_TC_TEMP_2); // temperature control | 
| eencae | 24:342bdb6679a1 | 68 | sendCommand(CMD_BI_MUX_48); // changing this can sometimes improve the contrast on some displays | 
| eencae | 0:d563e74f0ae9 | 69 | |
| eencae | 24:342bdb6679a1 | 70 | // function set - basic | 
| eencae | 24:342bdb6679a1 | 71 | sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE); | 
| eencae | 24:342bdb6679a1 | 72 | normalMode(); // normal video mode by default | 
| eencae | 24:342bdb6679a1 | 73 | sendCommand(CMD_DC_NORMAL_MODE); // black on white | 
| eencae | 0:d563e74f0ae9 | 74 | |
| eencae | 24:342bdb6679a1 | 75 | clearRAM(); // RAM is undefined at power-up so clear | 
| eencae | 24:342bdb6679a1 | 76 | clear(); // clear buffer | 
| eencae | 24:342bdb6679a1 | 77 | setBrightness(0.5); | 
| eencae | 0:d563e74f0ae9 | 78 | } | 
| eencae | 13:908644099648 | 79 | |
| eencae | 13:908644099648 | 80 | // sets normal video mode (black on white) | 
| eencae | 13:908644099648 | 81 | void N5110::normalMode() | 
| eencae | 13:908644099648 | 82 | { | 
| eencae | 24:342bdb6679a1 | 83 | sendCommand(CMD_DC_NORMAL_MODE); | 
| eencae | 1:df68f34cd32d | 84 | } | 
| eencae | 1:df68f34cd32d | 85 | |
| eencae | 13:908644099648 | 86 | // sets normal video mode (white on black) | 
| eencae | 13:908644099648 | 87 | void N5110::inverseMode() | 
| eencae | 13:908644099648 | 88 | { | 
| eencae | 24:342bdb6679a1 | 89 | sendCommand(CMD_DC_INVERT_VIDEO); | 
| eencae | 1:df68f34cd32d | 90 | } | 
| eencae | 0:d563e74f0ae9 | 91 | |
| eencae | 24:342bdb6679a1 | 92 | // function to power up the LCD and backlight - only works when using GPIO to power | 
| eencae | 0:d563e74f0ae9 | 93 | void N5110::turnOn() | 
| eencae | 0:d563e74f0ae9 | 94 | { | 
| valavanisalex | 29:5bc91bd44c77 | 95 | if (_pwr != NULL) { | 
| valavanisalex | 29:5bc91bd44c77 | 96 | _pwr->write(1); // apply power | 
| eencae | 24:342bdb6679a1 | 97 | } | 
| eencae | 0:d563e74f0ae9 | 98 | } | 
| eencae | 0:d563e74f0ae9 | 99 | |
| eencae | 0:d563e74f0ae9 | 100 | // function to power down LCD | 
| eencae | 0:d563e74f0ae9 | 101 | void N5110::turnOff() | 
| eencae | 0:d563e74f0ae9 | 102 | { | 
| eencae | 24:342bdb6679a1 | 103 | clear(); // clear buffer | 
| eencae | 24:342bdb6679a1 | 104 | refresh(); | 
| eencae | 24:342bdb6679a1 | 105 | setBrightness(0.0); // turn backlight off | 
| eencae | 24:342bdb6679a1 | 106 | clearRAM(); // clear RAM to ensure specified current consumption | 
| eencae | 24:342bdb6679a1 | 107 | // send command to ensure we are in basic mode | 
| eencae | 24:342bdb6679a1 | 108 | sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE); | 
| eencae | 24:342bdb6679a1 | 109 | // clear the display | 
| eencae | 24:342bdb6679a1 | 110 | sendCommand(CMD_DC_CLEAR_DISPLAY); | 
| eencae | 24:342bdb6679a1 | 111 | // enter the extended mode and power down | 
| eencae | 24:342bdb6679a1 | 112 | sendCommand(0x20 | CMD_FS_POWER_DOWN_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE); | 
| eencae | 24:342bdb6679a1 | 113 | // small delay and then turn off the power pin | 
| eencae | 24:342bdb6679a1 | 114 | wait_ms(10); | 
| eencae | 23:eb7e6632fc9e | 115 | |
| eencae | 24:342bdb6679a1 | 116 | // if we are powering the LCD using the GPIO then make it low to turn off | 
| valavanisalex | 29:5bc91bd44c77 | 117 | if (_pwr != NULL) { | 
| valavanisalex | 29:5bc91bd44c77 | 118 | _pwr->write(0); // turn off power | 
| eencae | 24:342bdb6679a1 | 119 | } | 
| eencae | 0:d563e74f0ae9 | 120 | |
| eencae | 0:d563e74f0ae9 | 121 | } | 
| eencae | 0:d563e74f0ae9 | 122 | |
| eencae | 0:d563e74f0ae9 | 123 | // function to change LED backlight brightness | 
| eencae | 0:d563e74f0ae9 | 124 | void N5110::setBrightness(float brightness) | 
| eencae | 0:d563e74f0ae9 | 125 | { | 
| eencae | 24:342bdb6679a1 | 126 | // check whether brightness is within range | 
| eencae | 24:342bdb6679a1 | 127 | if (brightness < 0.0f) | 
| eencae | 24:342bdb6679a1 | 128 | brightness = 0.0f; | 
| eencae | 24:342bdb6679a1 | 129 | if (brightness > 1.0f) | 
| eencae | 24:342bdb6679a1 | 130 | brightness = 1.0f; | 
| eencae | 24:342bdb6679a1 | 131 | // set PWM duty cycle | 
| valavanisalex | 29:5bc91bd44c77 | 132 | _led->write(brightness); | 
| eencae | 0:d563e74f0ae9 | 133 | } | 
| eencae | 0:d563e74f0ae9 | 134 | |
| eencae | 0:d563e74f0ae9 | 135 | |
| eencae | 0:d563e74f0ae9 | 136 | // pulse the active low reset line | 
| eencae | 0:d563e74f0ae9 | 137 | void N5110::reset() | 
| eencae | 0:d563e74f0ae9 | 138 | { | 
| valavanisalex | 29:5bc91bd44c77 | 139 | _rst->write(0); // reset the LCD | 
| valavanisalex | 29:5bc91bd44c77 | 140 | _rst->write(1); | 
| eencae | 0:d563e74f0ae9 | 141 | } | 
| eencae | 0:d563e74f0ae9 | 142 | |
| eencae | 0:d563e74f0ae9 | 143 | // function to initialise SPI peripheral | 
| eencae | 0:d563e74f0ae9 | 144 | void N5110::initSPI() | 
| eencae | 0:d563e74f0ae9 | 145 | { | 
| valavanisalex | 29:5bc91bd44c77 | 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 | 
| valavanisalex | 29:5bc91bd44c77 | 147 | _spi->frequency(4000000); // maximum of screen is 4 MHz | 
| eencae | 0:d563e74f0ae9 | 148 | } | 
| eencae | 0:d563e74f0ae9 | 149 | |
| eencae | 6:adb79338d40f | 150 | // send a command to the display | 
| eencae | 0:d563e74f0ae9 | 151 | void N5110::sendCommand(unsigned char command) | 
| eencae | 0:d563e74f0ae9 | 152 | { | 
| valavanisalex | 29:5bc91bd44c77 | 153 | _dc->write(0); // set DC low for command | 
| valavanisalex | 29:5bc91bd44c77 | 154 | _sce->write(0); // set CE low to begin frame | 
| valavanisalex | 29:5bc91bd44c77 | 155 | _spi->write(command); // send command | 
| valavanisalex | 29:5bc91bd44c77 | 156 | _dc->write(1); // turn back to data by default | 
| valavanisalex | 29:5bc91bd44c77 | 157 | _sce->write(1); // set CE high to end frame (expected for transmission of single byte) | 
| eencae | 0:d563e74f0ae9 | 158 | } | 
| eencae | 0:d563e74f0ae9 | 159 | |
| eencae | 6:adb79338d40f | 160 | // send data to the display at the current XY address | 
| eencae | 6:adb79338d40f | 161 | // dc is set to 1 (i.e. data) after sending a command and so should | 
| eencae | 6:adb79338d40f | 162 | // be the default mode. | 
| eencae | 0:d563e74f0ae9 | 163 | void N5110::sendData(unsigned char data) | 
| eencae | 0:d563e74f0ae9 | 164 | { | 
| valavanisalex | 29:5bc91bd44c77 | 165 | _sce->write(0); // set CE low to begin frame | 
| valavanisalex | 29:5bc91bd44c77 | 166 | _spi->write(data); | 
| valavanisalex | 29:5bc91bd44c77 | 167 | _sce->write(1); // set CE high to end frame (expected for transmission of single byte) | 
| eencae | 0:d563e74f0ae9 | 168 | } | 
| eencae | 0:d563e74f0ae9 | 169 | |
| eencae | 0:d563e74f0ae9 | 170 | // this function writes 0 to the 504 bytes to clear the RAM | 
| eencae | 0:d563e74f0ae9 | 171 | void N5110::clearRAM() | 
| eencae | 0:d563e74f0ae9 | 172 | { | 
| valavanisalex | 29:5bc91bd44c77 | 173 | _sce->write(0); //set CE low to begin frame | 
| eencae | 24:342bdb6679a1 | 174 | for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes | 
| valavanisalex | 29:5bc91bd44c77 | 175 | _spi->write(0x00); // send 0's | 
| eencae | 24:342bdb6679a1 | 176 | } | 
| valavanisalex | 29:5bc91bd44c77 | 177 | _sce->write(1); // set CE high to end frame | 
| eencae | 0:d563e74f0ae9 | 178 | } | 
| eencae | 0:d563e74f0ae9 | 179 | |
| eencae | 13:908644099648 | 180 | // function to set the XY address in RAM for subsequenct data write | 
| valavanisalex | 29:5bc91bd44c77 | 181 | void N5110::setXYAddress(unsigned int const x, | 
| valavanisalex | 29:5bc91bd44c77 | 182 | unsigned int const y) | 
| eencae | 0:d563e74f0ae9 | 183 | { | 
| valavanisalex | 29:5bc91bd44c77 | 184 | if (x<WIDTH && y<HEIGHT) { // check within range | 
| eencae | 24:342bdb6679a1 | 185 | sendCommand(0x80 | x); // send addresses to display with relevant mask | 
| eencae | 24:342bdb6679a1 | 186 | sendCommand(0x40 | y); | 
| eencae | 24:342bdb6679a1 | 187 | } | 
| eencae | 0:d563e74f0ae9 | 188 | } | 
| eencae | 0:d563e74f0ae9 | 189 | |
| eencae | 6:adb79338d40f | 190 | // These functions are used to set, clear and get the value of pixels in the display | 
| eencae | 6:adb79338d40f | 191 | // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh() | 
| eencae | 6:adb79338d40f | 192 | // function must be called after set and clear in order to update the display | 
| valavanisalex | 29:5bc91bd44c77 | 193 | void N5110::setPixel(unsigned int const x, | 
| valavanisalex | 42:596c207519de | 194 | unsigned int const y, | 
| valavanisalex | 42:596c207519de | 195 | bool const state) | 
| eencae | 0:d563e74f0ae9 | 196 | { | 
| valavanisalex | 29:5bc91bd44c77 | 197 | if (x<WIDTH && y<HEIGHT) { // check within range | 
| eencae | 24:342bdb6679a1 | 198 | // calculate bank and shift 1 to required position in the data byte | 
| valavanisalex | 42:596c207519de | 199 | if(state) buffer[x][y/8] |= (1 << y%8); | 
| valavanisalex | 42:596c207519de | 200 | else buffer[x][y/8] &= ~(1 << y%8); | 
| eencae | 24:342bdb6679a1 | 201 | } | 
| eencae | 0:d563e74f0ae9 | 202 | } | 
| eencae | 0:d563e74f0ae9 | 203 | |
| valavanisalex | 29:5bc91bd44c77 | 204 | void N5110::clearPixel(unsigned int const x, | 
| valavanisalex | 29:5bc91bd44c77 | 205 | unsigned int const y) | 
| eencae | 0:d563e74f0ae9 | 206 | { | 
| valavanisalex | 29:5bc91bd44c77 | 207 | if (x<WIDTH && y<HEIGHT) { // check within range | 
| eencae | 24:342bdb6679a1 | 208 | // calculate bank and shift 1 to required position (using bit clear) | 
| eencae | 24:342bdb6679a1 | 209 | buffer[x][y/8] &= ~(1 << y%8); | 
| eencae | 24:342bdb6679a1 | 210 | } | 
| eencae | 0:d563e74f0ae9 | 211 | } | 
| eencae | 0:d563e74f0ae9 | 212 | |
| valavanisalex | 29:5bc91bd44c77 | 213 | int N5110::getPixel(unsigned int const x, | 
| valavanisalex | 29:5bc91bd44c77 | 214 | unsigned int const y) const | 
| eencae | 0:d563e74f0ae9 | 215 | { | 
| valavanisalex | 29:5bc91bd44c77 | 216 | if (x<WIDTH && y<HEIGHT) { // check within range | 
| eencae | 24:342bdb6679a1 | 217 | // return relevant bank and mask required bit | 
| eencae | 24:342bdb6679a1 | 218 | |
| eencae | 24:342bdb6679a1 | 219 | int pixel = (int) buffer[x][y/8] & (1 << y%8); | 
| eencae | 24:342bdb6679a1 | 220 | |
| eencae | 24:342bdb6679a1 | 221 | if (pixel) | 
| eencae | 24:342bdb6679a1 | 222 | return 1; | 
| eencae | 24:342bdb6679a1 | 223 | else | 
| eencae | 24:342bdb6679a1 | 224 | return 0; | 
| eencae | 24:342bdb6679a1 | 225 | } | 
| eencae | 24:342bdb6679a1 | 226 | |
| eencae | 23:eb7e6632fc9e | 227 | return 0; | 
| eencae | 24:342bdb6679a1 | 228 | |
| eencae | 0:d563e74f0ae9 | 229 | } | 
| eencae | 0:d563e74f0ae9 | 230 | |
| eencae | 6:adb79338d40f | 231 | // function to refresh the display | 
| eencae | 6:adb79338d40f | 232 | void N5110::refresh() | 
| eencae | 0:d563e74f0ae9 | 233 | { | 
| eencae | 24:342bdb6679a1 | 234 | setXYAddress(0,0); // important to set address back to 0,0 before refreshing display | 
| eencae | 24:342bdb6679a1 | 235 | // address auto increments after printing string, so buffer[0][0] will not coincide | 
| eencae | 24:342bdb6679a1 | 236 | // with top-left pixel after priting string | 
| eencae | 13:908644099648 | 237 | |
| valavanisalex | 29:5bc91bd44c77 | 238 | _sce->write(0); //set CE low to begin frame | 
| eencae | 13:908644099648 | 239 | |
| eencae | 24:342bdb6679a1 | 240 | for(int j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing | 
| eencae | 24:342bdb6679a1 | 241 | for(int i = 0; i < WIDTH; i++) { | 
| valavanisalex | 29:5bc91bd44c77 | 242 | _spi->write(buffer[i][j]); // send buffer | 
| eencae | 24:342bdb6679a1 | 243 | } | 
| eencae | 0:d563e74f0ae9 | 244 | } | 
| valavanisalex | 29:5bc91bd44c77 | 245 | _sce->write(1); // set CE high to end frame | 
| eencae | 0:d563e74f0ae9 | 246 | |
| eencae | 0:d563e74f0ae9 | 247 | } | 
| eencae | 0:d563e74f0ae9 | 248 | |
| eencae | 6:adb79338d40f | 249 | // fills the buffer with random bytes. Can be used to test the display. | 
| eencae | 6:adb79338d40f | 250 | // The rand() function isn't seeded so it probably creates the same pattern everytime | 
| eencae | 0:d563e74f0ae9 | 251 | void N5110::randomiseBuffer() | 
| eencae | 0:d563e74f0ae9 | 252 | { | 
| eencae | 24:342bdb6679a1 | 253 | int i,j; | 
| eencae | 24:342bdb6679a1 | 254 | for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing | 
| eencae | 24:342bdb6679a1 | 255 | for(i = 0; i < WIDTH; i++) { | 
| eencae | 24:342bdb6679a1 | 256 | buffer[i][j] = rand()%256; // generate random byte | 
| eencae | 24:342bdb6679a1 | 257 | } | 
| eencae | 0:d563e74f0ae9 | 258 | } | 
| eencae | 0:d563e74f0ae9 | 259 | |
| eencae | 0:d563e74f0ae9 | 260 | } | 
| eencae | 0:d563e74f0ae9 | 261 | |
| eencae | 0:d563e74f0ae9 | 262 | // function to print 5x7 font | 
| valavanisalex | 29:5bc91bd44c77 | 263 | void N5110::printChar(char const c, | 
| valavanisalex | 29:5bc91bd44c77 | 264 | unsigned int const x, | 
| valavanisalex | 29:5bc91bd44c77 | 265 | unsigned int const y) | 
| eencae | 0:d563e74f0ae9 | 266 | { | 
| valavanisalex | 29:5bc91bd44c77 | 267 | if (y<BANKS) { // check if printing in range of y banks | 
| eencae | 18:1af393359298 | 268 | |
| eencae | 24:342bdb6679a1 | 269 | for (int i = 0; i < 5 ; i++ ) { | 
| eencae | 24:342bdb6679a1 | 270 | int pixel_x = x+i; | 
| eencae | 24:342bdb6679a1 | 271 | if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83) | 
| eencae | 24:342bdb6679a1 | 272 | break; | 
| eencae | 24:342bdb6679a1 | 273 | buffer[pixel_x][y] = font5x7[(c - 32)*5 + i]; | 
| eencae | 24:342bdb6679a1 | 274 | // array is offset by 32 relative to ASCII, each character is 5 pixels wide | 
| eencae | 24:342bdb6679a1 | 275 | } | 
| valavanisalex | 29:5bc91bd44c77 | 276 | |
| eencae | 23:eb7e6632fc9e | 277 | } | 
| eencae | 0:d563e74f0ae9 | 278 | } | 
| eencae | 0:d563e74f0ae9 | 279 | |
| eencae | 0:d563e74f0ae9 | 280 | // function to print string at specified position | 
| valavanisalex | 29:5bc91bd44c77 | 281 | void N5110::printString(const char *str, | 
| valavanisalex | 29:5bc91bd44c77 | 282 | unsigned int const x, | 
| valavanisalex | 29:5bc91bd44c77 | 283 | unsigned int const y) | 
| eencae | 0:d563e74f0ae9 | 284 | { | 
| valavanisalex | 29:5bc91bd44c77 | 285 | if (y<BANKS) { // check if printing in range of y banks | 
| eencae | 18:1af393359298 | 286 | |
| eencae | 24:342bdb6679a1 | 287 | int n = 0 ; // counter for number of characters in string | 
| eencae | 24:342bdb6679a1 | 288 | // loop through string and print character | 
| eencae | 24:342bdb6679a1 | 289 | while(*str) { | 
| eencae | 0:d563e74f0ae9 | 290 | |
| eencae | 24:342bdb6679a1 | 291 | // writes the character bitmap data to the buffer, so that | 
| eencae | 24:342bdb6679a1 | 292 | // text and pixels can be displayed at the same time | 
| eencae | 24:342bdb6679a1 | 293 | for (int i = 0; i < 5 ; i++ ) { | 
| eencae | 24:342bdb6679a1 | 294 | int pixel_x = x+i+n*6; | 
| eencae | 24:342bdb6679a1 | 295 | if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83) | 
| eencae | 24:342bdb6679a1 | 296 | break; | 
| eencae | 24:342bdb6679a1 | 297 | buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i]; | 
| eencae | 24:342bdb6679a1 | 298 | } | 
| eencae | 24:342bdb6679a1 | 299 | str++; // go to next character in string | 
| eencae | 24:342bdb6679a1 | 300 | n++; // increment index | 
| eencae | 24:342bdb6679a1 | 301 | } | 
| eencae | 23:eb7e6632fc9e | 302 | } | 
| eencae | 0:d563e74f0ae9 | 303 | } | 
| eencae | 0:d563e74f0ae9 | 304 | |
| eencae | 24:342bdb6679a1 | 305 | // function to clear the screen buffer | 
| eencae | 0:d563e74f0ae9 | 306 | void N5110::clear() | 
| eencae | 0:d563e74f0ae9 | 307 | { | 
| eencae | 24:342bdb6679a1 | 308 | memset(buffer,0,sizeof(buffer)); | 
| eencae | 8:40abe5736eca | 309 | } | 
| eencae | 8:40abe5736eca | 310 | |
| eencae | 8:40abe5736eca | 311 | // function to plot array on display | 
| valavanisalex | 29:5bc91bd44c77 | 312 | void N5110::plotArray(float const array[]) | 
| eencae | 13:908644099648 | 313 | { | 
| eencae | 24:342bdb6679a1 | 314 | for (int i=0; i<WIDTH; i++) { // loop through array | 
| eencae | 24:342bdb6679a1 | 315 | // elements are normalised from 0.0 to 1.0, so multiply | 
| eencae | 24:342bdb6679a1 | 316 | // by 47 to convert to pixel range, and subtract from 47 | 
| eencae | 24:342bdb6679a1 | 317 | // since top-left is 0,0 in the display geometry | 
| eencae | 24:342bdb6679a1 | 318 | setPixel(i,47 - int(array[i]*47.0f)); | 
| eencae | 24:342bdb6679a1 | 319 | } | 
| eencae | 13:908644099648 | 320 | |
| eencae | 17:780a542d5f8b | 321 | } | 
| eencae | 13:908644099648 | 322 | |
| eencae | 17:780a542d5f8b | 323 | // function to draw circle | 
| valavanisalex | 29:5bc91bd44c77 | 324 | void N5110:: drawCircle(unsigned int const x0, | 
| valavanisalex | 29:5bc91bd44c77 | 325 | unsigned int const y0, | 
| valavanisalex | 29:5bc91bd44c77 | 326 | unsigned int const radius, | 
| valavanisalex | 33:d80e568a2e18 | 327 | FillType const fill) | 
| eencae | 17:780a542d5f8b | 328 | { | 
| eencae | 24:342bdb6679a1 | 329 | // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm | 
| eencae | 24:342bdb6679a1 | 330 | int x = radius; | 
| eencae | 24:342bdb6679a1 | 331 | int y = 0; | 
| eencae | 24:342bdb6679a1 | 332 | int radiusError = 1-x; | 
| eencae | 17:780a542d5f8b | 333 | |
| eencae | 24:342bdb6679a1 | 334 | while(x >= y) { | 
| eencae | 17:780a542d5f8b | 335 | |
| eencae | 24:342bdb6679a1 | 336 | // if transparent, just draw outline | 
| valavanisalex | 33:d80e568a2e18 | 337 | if (fill == FILL_TRANSPARENT) { | 
| eencae | 24:342bdb6679a1 | 338 | setPixel( x + x0, y + y0); | 
| eencae | 24:342bdb6679a1 | 339 | setPixel(-x + x0, y + y0); | 
| eencae | 24:342bdb6679a1 | 340 | setPixel( y + x0, x + y0); | 
| eencae | 24:342bdb6679a1 | 341 | setPixel(-y + x0, x + y0); | 
| eencae | 24:342bdb6679a1 | 342 | setPixel(-y + x0, -x + y0); | 
| eencae | 24:342bdb6679a1 | 343 | setPixel( y + x0, -x + y0); | 
| eencae | 24:342bdb6679a1 | 344 | setPixel( x + x0, -y + y0); | 
| eencae | 24:342bdb6679a1 | 345 | setPixel(-x + x0, -y + y0); | 
| eencae | 24:342bdb6679a1 | 346 | } else { // drawing filled circle, so draw lines between points at same y value | 
| eencae | 17:780a542d5f8b | 347 | |
| valavanisalex | 33:d80e568a2e18 | 348 | int type = (fill==FILL_BLACK) ? 1:0; // black or white fill | 
| eencae | 17:780a542d5f8b | 349 | |
| eencae | 24:342bdb6679a1 | 350 | drawLine(x+x0,y+y0,-x+x0,y+y0,type); | 
| eencae | 24:342bdb6679a1 | 351 | drawLine(y+x0,x+y0,-y+x0,x+y0,type); | 
| eencae | 24:342bdb6679a1 | 352 | drawLine(y+x0,-x+y0,-y+x0,-x+y0,type); | 
| eencae | 24:342bdb6679a1 | 353 | drawLine(x+x0,-y+y0,-x+x0,-y+y0,type); | 
| eencae | 24:342bdb6679a1 | 354 | } | 
| eencae | 17:780a542d5f8b | 355 | |
| eencae | 24:342bdb6679a1 | 356 | y++; | 
| eencae | 24:342bdb6679a1 | 357 | if (radiusError<0) { | 
| eencae | 24:342bdb6679a1 | 358 | radiusError += 2 * y + 1; | 
| eencae | 24:342bdb6679a1 | 359 | } else { | 
| eencae | 24:342bdb6679a1 | 360 | x--; | 
| eencae | 24:342bdb6679a1 | 361 | radiusError += 2 * (y - x) + 1; | 
| eencae | 24:342bdb6679a1 | 362 | } | 
| eencae | 17:780a542d5f8b | 363 | } | 
| eencae | 17:780a542d5f8b | 364 | |
| eencae | 17:780a542d5f8b | 365 | } | 
| eencae | 17:780a542d5f8b | 366 | |
| valavanisalex | 29:5bc91bd44c77 | 367 | void N5110::drawLine(unsigned int const x0, | 
| valavanisalex | 29:5bc91bd44c77 | 368 | unsigned int const y0, | 
| valavanisalex | 29:5bc91bd44c77 | 369 | unsigned int const x1, | 
| valavanisalex | 29:5bc91bd44c77 | 370 | unsigned int const y1, | 
| valavanisalex | 29:5bc91bd44c77 | 371 | unsigned int const type) | 
| eencae | 17:780a542d5f8b | 372 | { | 
| eencae | 24:342bdb6679a1 | 373 | int y_range = y1-y0; // calc range of y and x | 
| eencae | 24:342bdb6679a1 | 374 | int x_range = x1-x0; | 
| eencae | 24:342bdb6679a1 | 375 | int start,stop,step; | 
| eencae | 17:780a542d5f8b | 376 | |
| eencae | 24:342bdb6679a1 | 377 | // if dotted line, set step to 2, else step is 1 | 
| eencae | 24:342bdb6679a1 | 378 | step = (type==2) ? 2:1; | 
| eencae | 17:780a542d5f8b | 379 | |
| eencae | 24:342bdb6679a1 | 380 | // make sure we loop over the largest range to get the most pixels on the display | 
| eencae | 24:342bdb6679a1 | 381 | // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels | 
| eencae | 24:342bdb6679a1 | 382 | // or else we'll only end up with 1 pixel in the x column | 
| eencae | 24:342bdb6679a1 | 383 | if ( abs(x_range) > abs(y_range) ) { | 
| eencae | 17:780a542d5f8b | 384 | |
| eencae | 24:342bdb6679a1 | 385 | // ensure we loop from smallest to largest or else for-loop won't run as expected | 
| eencae | 24:342bdb6679a1 | 386 | start = x1>x0 ? x0:x1; | 
| eencae | 24:342bdb6679a1 | 387 | stop = x1>x0 ? x1:x0; | 
| eencae | 17:780a542d5f8b | 388 | |
| eencae | 24:342bdb6679a1 | 389 | // loop between x pixels | 
| eencae | 24:342bdb6679a1 | 390 | for (int x = start; x<= stop ; x+=step) { | 
| eencae | 24:342bdb6679a1 | 391 | // do linear interpolation | 
| eencae | 24:342bdb6679a1 | 392 | int y = y0 + (y1-y0)*(x-x0)/(x1-x0); | 
| eencae | 17:780a542d5f8b | 393 | |
| valavanisalex | 42:596c207519de | 394 | // If the line type is '0', this will clear the pixel | 
| valavanisalex | 42:596c207519de | 395 | // If it is '1' or '2', the pixel will be set | 
| valavanisalex | 42:596c207519de | 396 | setPixel(x,y, type); | 
| eencae | 24:342bdb6679a1 | 397 | } | 
| eencae | 24:342bdb6679a1 | 398 | } else { | 
| eencae | 17:780a542d5f8b | 399 | |
| eencae | 24:342bdb6679a1 | 400 | // ensure we loop from smallest to largest or else for-loop won't run as expected | 
| eencae | 24:342bdb6679a1 | 401 | start = y1>y0 ? y0:y1; | 
| eencae | 24:342bdb6679a1 | 402 | stop = y1>y0 ? y1:y0; | 
| eencae | 17:780a542d5f8b | 403 | |
| eencae | 24:342bdb6679a1 | 404 | for (int y = start; y<= stop ; y+=step) { | 
| eencae | 24:342bdb6679a1 | 405 | // do linear interpolation | 
| eencae | 24:342bdb6679a1 | 406 | int x = x0 + (x1-x0)*(y-y0)/(y1-y0); | 
| eencae | 17:780a542d5f8b | 407 | |
| valavanisalex | 42:596c207519de | 408 | // If the line type is '0', this will clear the pixel | 
| valavanisalex | 42:596c207519de | 409 | // If it is '1' or '2', the pixel will be set | 
| valavanisalex | 42:596c207519de | 410 | setPixel(x,y, type); | 
| eencae | 24:342bdb6679a1 | 411 | } | 
| eencae | 17:780a542d5f8b | 412 | } | 
| eencae | 17:780a542d5f8b | 413 | |
| eencae | 17:780a542d5f8b | 414 | } | 
| eencae | 17:780a542d5f8b | 415 | |
| valavanisalex | 29:5bc91bd44c77 | 416 | void N5110::drawRect(unsigned int const x0, | 
| valavanisalex | 29:5bc91bd44c77 | 417 | unsigned int const y0, | 
| valavanisalex | 29:5bc91bd44c77 | 418 | unsigned int const width, | 
| valavanisalex | 29:5bc91bd44c77 | 419 | unsigned int const height, | 
| valavanisalex | 33:d80e568a2e18 | 420 | FillType const fill) | 
| eencae | 17:780a542d5f8b | 421 | { | 
| valavanisalex | 33:d80e568a2e18 | 422 | if (fill == FILL_TRANSPARENT) { // transparent, just outline | 
| eencae | 27:0d8d90936b4c | 423 | drawLine(x0,y0,x0+(width-1),y0,1); // top | 
| eencae | 27:0d8d90936b4c | 424 | drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1); // bottom | 
| eencae | 27:0d8d90936b4c | 425 | drawLine(x0,y0,x0,y0+(height-1),1); // left | 
| eencae | 27:0d8d90936b4c | 426 | drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1); // right | 
| eencae | 24:342bdb6679a1 | 427 | } else { // filled rectangle | 
| valavanisalex | 33:d80e568a2e18 | 428 | int type = (fill==FILL_BLACK) ? 1:0; // black or white fill | 
| eencae | 27:0d8d90936b4c | 429 | for (int y = y0; y<y0+height; y++) { // loop through rows of rectangle | 
| eencae | 27:0d8d90936b4c | 430 | drawLine(x0,y,x0+(width-1),y,type); // draw line across screen | 
| eencae | 24:342bdb6679a1 | 431 | } | 
| eencae | 17:780a542d5f8b | 432 | } | 
| eencae | 35:2d5931a66fba | 433 | } | 
| eencae | 35:2d5931a66fba | 434 | |
| eencae | 36:00ebd449b6f3 | 435 | void N5110::drawSprite(int x0, | 
| valavanisalex | 42:596c207519de | 436 | int y0, | 
| valavanisalex | 42:596c207519de | 437 | int nrows, | 
| valavanisalex | 42:596c207519de | 438 | int ncols, | 
| valavanisalex | 42:596c207519de | 439 | int *sprite) | 
| eencae | 36:00ebd449b6f3 | 440 | { | 
| eencae | 36:00ebd449b6f3 | 441 | for (int i = 0; i < nrows; i++) { | 
| eencae | 36:00ebd449b6f3 | 442 | for (int j = 0 ; j < ncols ; j++) { | 
| eencae | 35:2d5931a66fba | 443 | |
| eencae | 36:00ebd449b6f3 | 444 | int pixel = *((sprite+i*ncols)+j); | 
| valavanisalex | 42:596c207519de | 445 | setPixel(x0+j,y0+i, pixel); | 
| eencae | 35:2d5931a66fba | 446 | } | 
| eencae | 35:2d5931a66fba | 447 | } | 
| valavanisalex | 29:5bc91bd44c77 | 448 | } |