FRDM-K64F Code Share / Mbed 2 deprecated snakegame

Snake game on nokia N5110 LCD

Dependencies:   mbed

Snake game on nokia N5110 LCD and Keyes Syos Joystick. You control snake using joystick. Start/pause game ba using button on joystick or by pressing p on your keyboard (serial communication). More info on my blog: http://sdizdarevic.com/post/94147065625/frdm-k64f-project

N5110/N5110.cpp@0:5bdb67970267, 2014-08-08 (annotated)

Committer:
sdizdarevic
Date:
Fri Aug 08 06:44:50 2014 +0000
Revision:
0:5bdb67970267
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
sdizdarevic 0:5bdb67970267 1 /**
sdizdarevic 0:5bdb67970267 2 @file N5110.cpp
sdizdarevic 0:5bdb67970267 3
sdizdarevic 0:5bdb67970267 4 @brief Member functions implementations
sdizdarevic 0:5bdb67970267 5
sdizdarevic 0:5bdb67970267 6 */
sdizdarevic 0:5bdb67970267 7 #include "mbed.h"
sdizdarevic 0:5bdb67970267 8 #include "N5110.h"
sdizdarevic 0:5bdb67970267 9
sdizdarevic 0:5bdb67970267 10
sdizdarevic 0:5bdb67970267 11 N5110::N5110(PinName pwrPin, PinName scePin, PinName rstPin, PinName dcPin, PinName mosiPin, PinName sclkPin, PinName ledPin)
sdizdarevic 0:5bdb67970267 12 {
sdizdarevic 0:5bdb67970267 13
sdizdarevic 0:5bdb67970267 14 spi = new SPI(mosiPin,NC,sclkPin); // create new SPI instance and initialise
sdizdarevic 0:5bdb67970267 15 initSPI();
sdizdarevic 0:5bdb67970267 16
sdizdarevic 0:5bdb67970267 17 // set up pins as required
sdizdarevic 0:5bdb67970267 18 led = new PwmOut(ledPin);
sdizdarevic 0:5bdb67970267 19 pwr = new DigitalOut(pwrPin);
sdizdarevic 0:5bdb67970267 20 sce = new DigitalOut(scePin);
sdizdarevic 0:5bdb67970267 21 rst = new DigitalOut(rstPin);
sdizdarevic 0:5bdb67970267 22 dc = new DigitalOut(dcPin);
sdizdarevic 0:5bdb67970267 23
sdizdarevic 0:5bdb67970267 24 }
sdizdarevic 0:5bdb67970267 25
sdizdarevic 0:5bdb67970267 26 // initialise function - powers up and sends the initialisation commands
sdizdarevic 0:5bdb67970267 27 void N5110::init()
sdizdarevic 0:5bdb67970267 28 {
sdizdarevic 0:5bdb67970267 29 turnOn(); // power up
sdizdarevic 0:5bdb67970267 30 wait_ms(10); // small delay seems to prevent spurious pixels during mbed reset
sdizdarevic 0:5bdb67970267 31 reset(); // reset LCD - must be done within 100 ms
sdizdarevic 0:5bdb67970267 32
sdizdarevic 0:5bdb67970267 33 // function set - extended
sdizdarevic 0:5bdb67970267 34 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
sdizdarevic 0:5bdb67970267 35 // Don't completely understand these parameters - they seem to work as they are
sdizdarevic 0:5bdb67970267 36 // Consult the datasheet if you need to change them
sdizdarevic 0:5bdb67970267 37 sendCommand(CMD_VOP_7V38); // operating voltage - these values are from Chris Yan's Library
sdizdarevic 0:5bdb67970267 38 sendCommand(CMD_TC_TEMP_2); // temperature control
sdizdarevic 0:5bdb67970267 39 sendCommand(CMD_BI_MUX_48); // bias
sdizdarevic 0:5bdb67970267 40
sdizdarevic 0:5bdb67970267 41 // function set - basic
sdizdarevic 0:5bdb67970267 42 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
sdizdarevic 0:5bdb67970267 43 normalMode(); // normal video mode by default
sdizdarevic 0:5bdb67970267 44 sendCommand(CMD_DC_NORMAL_MODE); // black on white
sdizdarevic 0:5bdb67970267 45
sdizdarevic 0:5bdb67970267 46 // RAM is undefined at power-up so clear
sdizdarevic 0:5bdb67970267 47 clearRAM();
sdizdarevic 0:5bdb67970267 48
sdizdarevic 0:5bdb67970267 49 }
sdizdarevic 0:5bdb67970267 50
sdizdarevic 0:5bdb67970267 51 // sets normal video mode (black on white)
sdizdarevic 0:5bdb67970267 52 void N5110::normalMode() {
sdizdarevic 0:5bdb67970267 53 sendCommand(CMD_DC_NORMAL_MODE);
sdizdarevic 0:5bdb67970267 54
sdizdarevic 0:5bdb67970267 55 }
sdizdarevic 0:5bdb67970267 56
sdizdarevic 0:5bdb67970267 57 // sets normal video mode (white on black)
sdizdarevic 0:5bdb67970267 58 void N5110::inverseMode() {
sdizdarevic 0:5bdb67970267 59 sendCommand(CMD_DC_INVERT_VIDEO);
sdizdarevic 0:5bdb67970267 60 }
sdizdarevic 0:5bdb67970267 61
sdizdarevic 0:5bdb67970267 62 // function to power up the LCD and backlight
sdizdarevic 0:5bdb67970267 63 void N5110::turnOn()
sdizdarevic 0:5bdb67970267 64 {
sdizdarevic 0:5bdb67970267 65 // set brightness of LED - 0.0 to 1.0 - default is 50%
sdizdarevic 0:5bdb67970267 66 setBrightness(0.5);
sdizdarevic 0:5bdb67970267 67 pwr->write(1); // apply power
sdizdarevic 0:5bdb67970267 68 }
sdizdarevic 0:5bdb67970267 69
sdizdarevic 0:5bdb67970267 70 // function to power down LCD
sdizdarevic 0:5bdb67970267 71 void N5110::turnOff()
sdizdarevic 0:5bdb67970267 72 {
sdizdarevic 0:5bdb67970267 73 setBrightness(0.0); // turn backlight off
sdizdarevic 0:5bdb67970267 74 clearRAM(); // clear RAM to ensure specified current consumption
sdizdarevic 0:5bdb67970267 75 // send command to ensure we are in basic model
sdizdarevic 0:5bdb67970267 76 sendCommand(0x20 | CMD_FS_ACTIVE_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_BASIC_MODE);
sdizdarevic 0:5bdb67970267 77 // clear the display
sdizdarevic 0:5bdb67970267 78 sendCommand(CMD_DC_CLEAR_DISPLAY);
sdizdarevic 0:5bdb67970267 79 // enter the extended mode and power down
sdizdarevic 0:5bdb67970267 80 sendCommand(0x20 | CMD_FS_POWER_DOWN_MODE | CMD_FS_HORIZONTAL_MODE | CMD_FS_EXTENDED_MODE);
sdizdarevic 0:5bdb67970267 81 // small delay and then turn off the power pin
sdizdarevic 0:5bdb67970267 82 wait_ms(10);
sdizdarevic 0:5bdb67970267 83 pwr->write(0);
sdizdarevic 0:5bdb67970267 84
sdizdarevic 0:5bdb67970267 85 }
sdizdarevic 0:5bdb67970267 86
sdizdarevic 0:5bdb67970267 87 // function to change LED backlight brightness
sdizdarevic 0:5bdb67970267 88 void N5110::setBrightness(float brightness)
sdizdarevic 0:5bdb67970267 89 {
sdizdarevic 0:5bdb67970267 90 // check whether brightness is within range
sdizdarevic 0:5bdb67970267 91 if (brightness < 0.0)
sdizdarevic 0:5bdb67970267 92 brightness = 0.0;
sdizdarevic 0:5bdb67970267 93 if (brightness > 1.0)
sdizdarevic 0:5bdb67970267 94 brightness = 1.0;
sdizdarevic 0:5bdb67970267 95 // set PWM duty cycle
sdizdarevic 0:5bdb67970267 96 led->write(brightness);
sdizdarevic 0:5bdb67970267 97 }
sdizdarevic 0:5bdb67970267 98
sdizdarevic 0:5bdb67970267 99
sdizdarevic 0:5bdb67970267 100 // pulse the active low reset line
sdizdarevic 0:5bdb67970267 101 void N5110::reset()
sdizdarevic 0:5bdb67970267 102 {
sdizdarevic 0:5bdb67970267 103 rst->write(0); // reset the LCD
sdizdarevic 0:5bdb67970267 104 rst->write(1);
sdizdarevic 0:5bdb67970267 105 }
sdizdarevic 0:5bdb67970267 106
sdizdarevic 0:5bdb67970267 107 // function to initialise SPI peripheral
sdizdarevic 0:5bdb67970267 108 void N5110::initSPI()
sdizdarevic 0:5bdb67970267 109 {
sdizdarevic 0:5bdb67970267 110 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
sdizdarevic 0:5bdb67970267 111 spi->frequency(4000000); // maximum of screen is 4 MHz
sdizdarevic 0:5bdb67970267 112 }
sdizdarevic 0:5bdb67970267 113
sdizdarevic 0:5bdb67970267 114 // send a command to the display
sdizdarevic 0:5bdb67970267 115 void N5110::sendCommand(unsigned char command)
sdizdarevic 0:5bdb67970267 116 {
sdizdarevic 0:5bdb67970267 117 dc->write(0); // set DC low for command
sdizdarevic 0:5bdb67970267 118 sce->write(0); // set CE low to begin frame
sdizdarevic 0:5bdb67970267 119 spi->write(command); // send command
sdizdarevic 0:5bdb67970267 120 dc->write(1); // turn back to data by default
sdizdarevic 0:5bdb67970267 121 sce->write(1); // set CE high to end frame (expected for transmission of single byte)
sdizdarevic 0:5bdb67970267 122
sdizdarevic 0:5bdb67970267 123 }
sdizdarevic 0:5bdb67970267 124
sdizdarevic 0:5bdb67970267 125 // send data to the display at the current XY address
sdizdarevic 0:5bdb67970267 126 // dc is set to 1 (i.e. data) after sending a command and so should
sdizdarevic 0:5bdb67970267 127 // be the default mode.
sdizdarevic 0:5bdb67970267 128 void N5110::sendData(unsigned char data)
sdizdarevic 0:5bdb67970267 129 {
sdizdarevic 0:5bdb67970267 130 sce->write(0); // set CE low to begin frame
sdizdarevic 0:5bdb67970267 131 spi->write(data);
sdizdarevic 0:5bdb67970267 132 sce->write(1); // set CE high to end frame (expected for transmission of single byte)
sdizdarevic 0:5bdb67970267 133 }
sdizdarevic 0:5bdb67970267 134
sdizdarevic 0:5bdb67970267 135 // this function writes 0 to the 504 bytes to clear the RAM
sdizdarevic 0:5bdb67970267 136 void N5110::clearRAM()
sdizdarevic 0:5bdb67970267 137 {
sdizdarevic 0:5bdb67970267 138 int i;
sdizdarevic 0:5bdb67970267 139 sce->write(0); //set CE low to begin frame
sdizdarevic 0:5bdb67970267 140 for(i = 0; i < 504; i++) { // 48 x 84 bits = 504 bytes
sdizdarevic 0:5bdb67970267 141 spi->write(0x00); // send 0's
sdizdarevic 0:5bdb67970267 142 }
sdizdarevic 0:5bdb67970267 143 sce->write(1); // set CE high to end frame
sdizdarevic 0:5bdb67970267 144
sdizdarevic 0:5bdb67970267 145 }
sdizdarevic 0:5bdb67970267 146
sdizdarevic 0:5bdb67970267 147 // function to set the XY address in RAM for subsequenct data write
sdizdarevic 0:5bdb67970267 148 void N5110::setXYAddress(int x, int y)
sdizdarevic 0:5bdb67970267 149 {
sdizdarevic 0:5bdb67970267 150 // check whether address is in range
sdizdarevic 0:5bdb67970267 151 if (x > 83)
sdizdarevic 0:5bdb67970267 152 x=83;
sdizdarevic 0:5bdb67970267 153 if (y > 5)
sdizdarevic 0:5bdb67970267 154 y=5;
sdizdarevic 0:5bdb67970267 155 if (x < 0)
sdizdarevic 0:5bdb67970267 156 x=0;
sdizdarevic 0:5bdb67970267 157 if (y < 0)
sdizdarevic 0:5bdb67970267 158 y=0;
sdizdarevic 0:5bdb67970267 159
sdizdarevic 0:5bdb67970267 160 sendCommand(0x80 | x); // send addresses to display with relevant mask
sdizdarevic 0:5bdb67970267 161 sendCommand(0x40 | y);
sdizdarevic 0:5bdb67970267 162 }
sdizdarevic 0:5bdb67970267 163
sdizdarevic 0:5bdb67970267 164 // These functions are used to set, clear and get the value of pixels in the display
sdizdarevic 0:5bdb67970267 165 // Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x). The refresh()
sdizdarevic 0:5bdb67970267 166 // function must be called after set and clear in order to update the display
sdizdarevic 0:5bdb67970267 167 void N5110::setPixel(int x, int y)
sdizdarevic 0:5bdb67970267 168 {
sdizdarevic 0:5bdb67970267 169 // calculate bank and shift 1 to required position in the data byte
sdizdarevic 0:5bdb67970267 170 buffer[x][y/8] |= (1 << y%8);
sdizdarevic 0:5bdb67970267 171 }
sdizdarevic 0:5bdb67970267 172
sdizdarevic 0:5bdb67970267 173 void N5110::clearPixel(int x, int y)
sdizdarevic 0:5bdb67970267 174 {
sdizdarevic 0:5bdb67970267 175 // calculate bank and shift 1 to required position (using bit clear)
sdizdarevic 0:5bdb67970267 176 buffer[x][y/8] &= ~(1 << y%8);
sdizdarevic 0:5bdb67970267 177 }
sdizdarevic 0:5bdb67970267 178
sdizdarevic 0:5bdb67970267 179 unsigned char N5110::getPixel(int x, int y)
sdizdarevic 0:5bdb67970267 180 {
sdizdarevic 0:5bdb67970267 181 // return relevant bank and mask required bit
sdizdarevic 0:5bdb67970267 182 return buffer[x][y/8] & (1 << y%8);
sdizdarevic 0:5bdb67970267 183
sdizdarevic 0:5bdb67970267 184 }
sdizdarevic 0:5bdb67970267 185
sdizdarevic 0:5bdb67970267 186 // function to refresh the display
sdizdarevic 0:5bdb67970267 187 void N5110::refresh()
sdizdarevic 0:5bdb67970267 188 {
sdizdarevic 0:5bdb67970267 189 int i,j;
sdizdarevic 0:5bdb67970267 190 sce->write(0); //set CE low to begin frame
sdizdarevic 0:5bdb67970267 191
sdizdarevic 0:5bdb67970267 192 for(j = 0; j < 6; j++) { // be careful to use correct order (j,i) for horizontal addressing
sdizdarevic 0:5bdb67970267 193 for(i = 0; i < 84; i++) {
sdizdarevic 0:5bdb67970267 194 spi->write(buffer[i][j]); // send buffer
sdizdarevic 0:5bdb67970267 195 }
sdizdarevic 0:5bdb67970267 196 }
sdizdarevic 0:5bdb67970267 197 sce->write(1); // set CE high to end frame
sdizdarevic 0:5bdb67970267 198
sdizdarevic 0:5bdb67970267 199 }
sdizdarevic 0:5bdb67970267 200
sdizdarevic 0:5bdb67970267 201 // fills the buffer with random bytes. Can be used to test the display.
sdizdarevic 0:5bdb67970267 202 // The rand() function isn't seeded so it probably creates the same pattern everytime
sdizdarevic 0:5bdb67970267 203 void N5110::randomiseBuffer()
sdizdarevic 0:5bdb67970267 204 {
sdizdarevic 0:5bdb67970267 205 int i,j;
sdizdarevic 0:5bdb67970267 206 for(j = 0; j < 6; j++) { // be careful to use correct order (j,i) for horizontal addressing
sdizdarevic 0:5bdb67970267 207 for(i = 0; i < 84; i++) {
sdizdarevic 0:5bdb67970267 208 buffer[i][j] = rand()%256; // generate random byte
sdizdarevic 0:5bdb67970267 209 }
sdizdarevic 0:5bdb67970267 210 }
sdizdarevic 0:5bdb67970267 211
sdizdarevic 0:5bdb67970267 212 }
sdizdarevic 0:5bdb67970267 213
sdizdarevic 0:5bdb67970267 214 // function to print 5x7 font
sdizdarevic 0:5bdb67970267 215 void N5110::printChar(char c)
sdizdarevic 0:5bdb67970267 216 {
sdizdarevic 0:5bdb67970267 217 int i;
sdizdarevic 0:5bdb67970267 218 // loop through 5 columns
sdizdarevic 0:5bdb67970267 219 for (i = 0; i < 5 ; i++ ) {
sdizdarevic 0:5bdb67970267 220 sendData(font5x7[(c - 32)*5 + i]);
sdizdarevic 0:5bdb67970267 221 // array is offset by 32 relative to ASCII, each character is 5 pixels wide
sdizdarevic 0:5bdb67970267 222 // the X address is automatically incremented after each data write
sdizdarevic 0:5bdb67970267 223 }
sdizdarevic 0:5bdb67970267 224 sendData(0); // send an empty byte to introduce space between characters
sdizdarevic 0:5bdb67970267 225
sdizdarevic 0:5bdb67970267 226 }
sdizdarevic 0:5bdb67970267 227
sdizdarevic 0:5bdb67970267 228 // function to print string at specified position
sdizdarevic 0:5bdb67970267 229 void N5110::printString(const char * str,int x,int y)
sdizdarevic 0:5bdb67970267 230 {
sdizdarevic 0:5bdb67970267 231 int n = 0 ; // counter for number of characters in string
sdizdarevic 0:5bdb67970267 232 // loop through string and print character
sdizdarevic 0:5bdb67970267 233 while(*str) {
sdizdarevic 0:5bdb67970267 234
sdizdarevic 0:5bdb67970267 235 setXYAddress(x+6*n,y); // leave 1 pixel (6 = 5 + 1) between each character
sdizdarevic 0:5bdb67970267 236 printChar(*str); // print the char - can probably so *str++ and remove next line
sdizdarevic 0:5bdb67970267 237 str++; // go to next character in string
sdizdarevic 0:5bdb67970267 238 n++; // increment index
sdizdarevic 0:5bdb67970267 239 }
sdizdarevic 0:5bdb67970267 240
sdizdarevic 0:5bdb67970267 241 }
sdizdarevic 0:5bdb67970267 242
sdizdarevic 0:5bdb67970267 243 // function to clear the screen
sdizdarevic 0:5bdb67970267 244 void N5110::clear()
sdizdarevic 0:5bdb67970267 245 {
sdizdarevic 0:5bdb67970267 246 clearBuffer(); // clear the buffer then call the refresh function
sdizdarevic 0:5bdb67970267 247 refresh();
sdizdarevic 0:5bdb67970267 248 }
sdizdarevic 0:5bdb67970267 249
sdizdarevic 0:5bdb67970267 250 // function to clear the buffer
sdizdarevic 0:5bdb67970267 251 void N5110::clearBuffer()
sdizdarevic 0:5bdb67970267 252 {
sdizdarevic 0:5bdb67970267 253 int i,j;
sdizdarevic 0:5bdb67970267 254 for (i=0; i<84; i++) { // loop through the banks and set the buffer to 0
sdizdarevic 0:5bdb67970267 255 for (j=0; j<6; j++) {
sdizdarevic 0:5bdb67970267 256 buffer[i][j]=0;
sdizdarevic 0:5bdb67970267 257 }
sdizdarevic 0:5bdb67970267 258 }
sdizdarevic 0:5bdb67970267 259 }