Richard Parker
/
EALCD
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screen/EALCD.cpp@4:f8f7f4f9c58d, 2010-04-26 (annotated)
- Committer:
- richardparker
- Date:
- Mon Apr 26 21:37:54 2010 +0000
- Revision:
- 4:f8f7f4f9c58d
- Parent:
- 3:24fbf4dbd7e5
- Child:
- 6:4fe6f365cbeb
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| richardparker | 0:839ecbf5cb2a | 1 | // Copyright 2010 Richard Parker |
| richardparker | 0:839ecbf5cb2a | 2 | |
| richardparker | 0:839ecbf5cb2a | 3 | #include "mbed.h" |
| richardparker | 0:839ecbf5cb2a | 4 | #include "EALCD.h" |
| richardparker | 0:839ecbf5cb2a | 5 | |
| richardparker | 0:839ecbf5cb2a | 6 | // Register addresses. |
| richardparker | 0:839ecbf5cb2a | 7 | #define EALCD_DEVICE_CODE_ADDRESS 0x00 |
| richardparker | 0:839ecbf5cb2a | 8 | #define EALCD_TOUCH_FREQ 10000 |
| richardparker | 0:839ecbf5cb2a | 9 | #define EALCD_LCD_FREQ 20000000 |
| richardparker | 0:839ecbf5cb2a | 10 | |
| richardparker | 0:839ecbf5cb2a | 11 | EALCD::EALCD( PinName LED_PWM, |
| richardparker | 0:839ecbf5cb2a | 12 | PinName LCD_RS, |
| richardparker | 0:839ecbf5cb2a | 13 | PinName LCD_SO, |
| richardparker | 0:839ecbf5cb2a | 14 | PinName LCD_SI, |
| richardparker | 0:839ecbf5cb2a | 15 | PinName LCD_SCL, |
| richardparker | 0:839ecbf5cb2a | 16 | PinName LCD_CS, |
| richardparker | 0:839ecbf5cb2a | 17 | PinName TCH_CS) |
| richardparker | 0:839ecbf5cb2a | 18 | : _backlight(LED_PWM), |
| richardparker | 0:839ecbf5cb2a | 19 | _comm(LCD_SI, LCD_SO, LCD_SCL), |
| richardparker | 0:839ecbf5cb2a | 20 | _rs(LCD_RS), |
| richardparker | 0:839ecbf5cb2a | 21 | _cs(LCD_CS), |
| richardparker | 4:f8f7f4f9c58d | 22 | _tch_cs(TCH_CS), |
| richardparker | 4:f8f7f4f9c58d | 23 | _maxBright(0.4) |
| richardparker | 0:839ecbf5cb2a | 24 | { |
| richardparker | 0:839ecbf5cb2a | 25 | // Make sure not selecting either chip. |
| richardparker | 0:839ecbf5cb2a | 26 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 27 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 28 | |
| richardparker | 0:839ecbf5cb2a | 29 | // Set the frequency of the PWM backlight to have a period ~400us. |
| richardparker | 0:839ecbf5cb2a | 30 | _backlight.period_us(400); |
| richardparker | 4:f8f7f4f9c58d | 31 | // By default fully on. |
| richardparker | 4:f8f7f4f9c58d | 32 | setBrightness(maxBrightness()); |
| richardparker | 0:839ecbf5cb2a | 33 | |
| richardparker | 0:839ecbf5cb2a | 34 | // Set up comms, 8 bit interface. |
| richardparker | 0:839ecbf5cb2a | 35 | _comm.format(8); |
| richardparker | 0:839ecbf5cb2a | 36 | _comm.frequency(EALCD_LCD_FREQ); |
| richardparker | 0:839ecbf5cb2a | 37 | |
| richardparker | 0:839ecbf5cb2a | 38 | // Now actual initialise the connection. |
| richardparker | 0:839ecbf5cb2a | 39 | _initialise(); |
| richardparker | 0:839ecbf5cb2a | 40 | } |
| richardparker | 0:839ecbf5cb2a | 41 | |
| richardparker | 0:839ecbf5cb2a | 42 | EALCD::~EALCD() |
| richardparker | 0:839ecbf5cb2a | 43 | { |
| richardparker | 0:839ecbf5cb2a | 44 | } |
| richardparker | 0:839ecbf5cb2a | 45 | |
| richardparker | 0:839ecbf5cb2a | 46 | void EALCD::setBrightness(float percentage) |
| richardparker | 0:839ecbf5cb2a | 47 | { |
| richardparker | 0:839ecbf5cb2a | 48 | // Check the value is within the correct range. |
| richardparker | 0:839ecbf5cb2a | 49 | if (percentage < 0) |
| richardparker | 0:839ecbf5cb2a | 50 | { |
| richardparker | 0:839ecbf5cb2a | 51 | percentage = 0; |
| richardparker | 0:839ecbf5cb2a | 52 | } |
| richardparker | 0:839ecbf5cb2a | 53 | else if (percentage > 1) |
| richardparker | 0:839ecbf5cb2a | 54 | { |
| richardparker | 0:839ecbf5cb2a | 55 | percentage = 1; |
| richardparker | 0:839ecbf5cb2a | 56 | } |
| richardparker | 0:839ecbf5cb2a | 57 | |
| richardparker | 0:839ecbf5cb2a | 58 | _backlight = 1-percentage; |
| richardparker | 0:839ecbf5cb2a | 59 | } |
| richardparker | 0:839ecbf5cb2a | 60 | |
| richardparker | 0:839ecbf5cb2a | 61 | void EALCD::_writeToDisplay(unsigned short data) |
| richardparker | 0:839ecbf5cb2a | 62 | { |
| richardparker | 0:839ecbf5cb2a | 63 | // Set RS which is connected to DC and so when high is to data. |
| richardparker | 0:839ecbf5cb2a | 64 | _rs = 1; |
| richardparker | 0:839ecbf5cb2a | 65 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 66 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 67 | |
| richardparker | 0:839ecbf5cb2a | 68 | // Write the msb data. |
| richardparker | 0:839ecbf5cb2a | 69 | _comm.write(data >> 8); |
| richardparker | 0:839ecbf5cb2a | 70 | // Write the lsb data. |
| richardparker | 0:839ecbf5cb2a | 71 | _comm.write(data & 0xff); |
| richardparker | 0:839ecbf5cb2a | 72 | |
| richardparker | 0:839ecbf5cb2a | 73 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 74 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 75 | } |
| richardparker | 0:839ecbf5cb2a | 76 | |
| richardparker | 0:839ecbf5cb2a | 77 | void EALCD::_writeToRegister(unsigned short addr, unsigned short data) |
| richardparker | 0:839ecbf5cb2a | 78 | { |
| richardparker | 0:839ecbf5cb2a | 79 | // Command phase. |
| richardparker | 0:839ecbf5cb2a | 80 | // Set RS which is connected to DC and so when low is to command. |
| richardparker | 0:839ecbf5cb2a | 81 | _rs = 0; |
| richardparker | 0:839ecbf5cb2a | 82 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 83 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 84 | |
| richardparker | 0:839ecbf5cb2a | 85 | // Write the msb address. |
| richardparker | 0:839ecbf5cb2a | 86 | _comm.write(addr >> 8); |
| richardparker | 0:839ecbf5cb2a | 87 | // Write the lsb address. |
| richardparker | 0:839ecbf5cb2a | 88 | _comm.write(addr & 0xff); |
| richardparker | 0:839ecbf5cb2a | 89 | |
| richardparker | 0:839ecbf5cb2a | 90 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 91 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 92 | |
| richardparker | 0:839ecbf5cb2a | 93 | // Data phase. |
| richardparker | 0:839ecbf5cb2a | 94 | // Set RS which is connected to DC and so when high is data. |
| richardparker | 0:839ecbf5cb2a | 95 | _rs = 1; |
| richardparker | 0:839ecbf5cb2a | 96 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 97 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 98 | |
| richardparker | 0:839ecbf5cb2a | 99 | // Write the msb data. |
| richardparker | 0:839ecbf5cb2a | 100 | _comm.write(data >> 8); |
| richardparker | 0:839ecbf5cb2a | 101 | // Write the lsb data. |
| richardparker | 0:839ecbf5cb2a | 102 | _comm.write(data & 0xff); |
| richardparker | 0:839ecbf5cb2a | 103 | |
| richardparker | 0:839ecbf5cb2a | 104 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 105 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 106 | |
| richardparker | 0:839ecbf5cb2a | 107 | // Restore index to GRAM by accessing GRAM register. |
| richardparker | 0:839ecbf5cb2a | 108 | // Set RS which is connected to DC and so when low is to command. |
| richardparker | 0:839ecbf5cb2a | 109 | _rs = 0; |
| richardparker | 0:839ecbf5cb2a | 110 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 111 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 112 | |
| richardparker | 0:839ecbf5cb2a | 113 | // Write the msb address. |
| richardparker | 0:839ecbf5cb2a | 114 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 115 | // Write the lsb address. |
| richardparker | 0:839ecbf5cb2a | 116 | _comm.write(0x22); |
| richardparker | 0:839ecbf5cb2a | 117 | |
| richardparker | 0:839ecbf5cb2a | 118 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 119 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 120 | } |
| richardparker | 0:839ecbf5cb2a | 121 | |
| richardparker | 0:839ecbf5cb2a | 122 | void EALCD::_initialise() |
| richardparker | 0:839ecbf5cb2a | 123 | { |
| richardparker | 0:839ecbf5cb2a | 124 | // Start up sequence. See page 72 of SSD1289 V1.3 datasheet for reasons. |
| richardparker | 0:839ecbf5cb2a | 125 | _writeToRegister(0x07, 0x0021); |
| richardparker | 0:839ecbf5cb2a | 126 | // Oscillator on. |
| richardparker | 0:839ecbf5cb2a | 127 | _writeToRegister(0x00, 0x0001); |
| richardparker | 0:839ecbf5cb2a | 128 | _writeToRegister(0x07, 0x0723); |
| richardparker | 0:839ecbf5cb2a | 129 | // Exit sleep mode |
| richardparker | 0:839ecbf5cb2a | 130 | _writeToRegister(0x10, 0x0000); |
| richardparker | 0:839ecbf5cb2a | 131 | // Pause 200ms (need at least 30ms). |
| richardparker | 0:839ecbf5cb2a | 132 | wait(0.2); |
| richardparker | 0:839ecbf5cb2a | 133 | _writeToRegister(0x07, 0x0033); |
| richardparker | 0:839ecbf5cb2a | 134 | // Setup screen orientation and colour mode etc. |
| richardparker | 0:839ecbf5cb2a | 135 | _writeToRegister(0x11, 0x6828); |
| richardparker | 0:839ecbf5cb2a | 136 | // LCD driving waveform. |
| richardparker | 0:839ecbf5cb2a | 137 | _writeToRegister(0x02, 0x0600); |
| richardparker | 0:839ecbf5cb2a | 138 | _writeToRegister(0x0f, 0x0000); |
| richardparker | 0:839ecbf5cb2a | 139 | // Driver output control. |
| richardparker | 0:839ecbf5cb2a | 140 | _writeToRegister(0x01, 0x2b3f); |
| richardparker | 0:839ecbf5cb2a | 141 | _writeToRegister(0x0b, 0x5308); |
| richardparker | 0:839ecbf5cb2a | 142 | // Set refresh rate to 70Hz. |
| richardparker | 0:839ecbf5cb2a | 143 | _writeToRegister(0x25, 0xa000); |
| richardparker | 0:839ecbf5cb2a | 144 | |
| richardparker | 0:839ecbf5cb2a | 145 | } |
| richardparker | 0:839ecbf5cb2a | 146 | |
| richardparker | 0:839ecbf5cb2a | 147 | void EALCD::_moveTo(short x, short y) |
| richardparker | 0:839ecbf5cb2a | 148 | { |
| richardparker | 0:839ecbf5cb2a | 149 | // Limit movement. |
| richardparker | 0:839ecbf5cb2a | 150 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 151 | { |
| richardparker | 0:839ecbf5cb2a | 152 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 153 | } |
| richardparker | 0:839ecbf5cb2a | 154 | |
| richardparker | 0:839ecbf5cb2a | 155 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 156 | { |
| richardparker | 0:839ecbf5cb2a | 157 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 158 | } |
| richardparker | 0:839ecbf5cb2a | 159 | |
| richardparker | 0:839ecbf5cb2a | 160 | if (x >= width()) |
| richardparker | 0:839ecbf5cb2a | 161 | { |
| richardparker | 0:839ecbf5cb2a | 162 | x = width()-1; |
| richardparker | 0:839ecbf5cb2a | 163 | } |
| richardparker | 0:839ecbf5cb2a | 164 | |
| richardparker | 0:839ecbf5cb2a | 165 | if (y >= height()) |
| richardparker | 0:839ecbf5cb2a | 166 | { |
| richardparker | 0:839ecbf5cb2a | 167 | y = height()-1; |
| richardparker | 0:839ecbf5cb2a | 168 | } |
| richardparker | 0:839ecbf5cb2a | 169 | |
| richardparker | 0:839ecbf5cb2a | 170 | // Masking values to prevent too large. |
| richardparker | 0:839ecbf5cb2a | 171 | x = x & 0x1ff; |
| richardparker | 0:839ecbf5cb2a | 172 | _writeToRegister(0x4f, x); |
| richardparker | 0:839ecbf5cb2a | 173 | |
| richardparker | 0:839ecbf5cb2a | 174 | // Mask to get down to a sensible number. |
| richardparker | 0:839ecbf5cb2a | 175 | y = y & 0xff; |
| richardparker | 0:839ecbf5cb2a | 176 | // -1 because pixel at top of screen is 239 (as 0 indexed therefore 240 high). |
| richardparker | 0:839ecbf5cb2a | 177 | y = height() - 1 - y; |
| richardparker | 0:839ecbf5cb2a | 178 | _writeToRegister(0x4e, y); |
| richardparker | 0:839ecbf5cb2a | 179 | } |
| richardparker | 0:839ecbf5cb2a | 180 | |
| richardparker | 0:839ecbf5cb2a | 181 | void EALCD::_window(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 182 | { |
| richardparker | 0:839ecbf5cb2a | 183 | // If start off screen then no need to even try drawing. |
| richardparker | 0:839ecbf5cb2a | 184 | if ((x >= width()) || (y >= height())) |
| richardparker | 0:839ecbf5cb2a | 185 | { |
| richardparker | 0:839ecbf5cb2a | 186 | return; |
| richardparker | 0:839ecbf5cb2a | 187 | } |
| richardparker | 0:839ecbf5cb2a | 188 | |
| richardparker | 0:839ecbf5cb2a | 189 | // Limit to not go off screen. |
| richardparker | 0:839ecbf5cb2a | 190 | if ((x + w) > width()) |
| richardparker | 0:839ecbf5cb2a | 191 | { |
| richardparker | 0:839ecbf5cb2a | 192 | w = width()-x; |
| richardparker | 0:839ecbf5cb2a | 193 | } |
| richardparker | 0:839ecbf5cb2a | 194 | |
| richardparker | 0:839ecbf5cb2a | 195 | if ((y + h) > height()) |
| richardparker | 0:839ecbf5cb2a | 196 | { |
| richardparker | 0:839ecbf5cb2a | 197 | h = height()-y; |
| richardparker | 0:839ecbf5cb2a | 198 | } |
| richardparker | 0:839ecbf5cb2a | 199 | |
| richardparker | 0:839ecbf5cb2a | 200 | // Move x and y to correct location. |
| richardparker | 0:839ecbf5cb2a | 201 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 202 | { |
| richardparker | 0:839ecbf5cb2a | 203 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 204 | } |
| richardparker | 0:839ecbf5cb2a | 205 | |
| richardparker | 0:839ecbf5cb2a | 206 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 207 | { |
| richardparker | 0:839ecbf5cb2a | 208 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 209 | } |
| richardparker | 0:839ecbf5cb2a | 210 | |
| richardparker | 0:839ecbf5cb2a | 211 | y = height() - 1 - y; |
| richardparker | 0:839ecbf5cb2a | 212 | |
| richardparker | 0:839ecbf5cb2a | 213 | // Vertical. |
| richardparker | 0:839ecbf5cb2a | 214 | unsigned short hsa = y - h + 1; |
| richardparker | 0:839ecbf5cb2a | 215 | unsigned short hea = y; |
| richardparker | 0:839ecbf5cb2a | 216 | hea = hea << 8; |
| richardparker | 0:839ecbf5cb2a | 217 | |
| richardparker | 0:839ecbf5cb2a | 218 | _writeToRegister(0x44, hsa | hea); |
| richardparker | 0:839ecbf5cb2a | 219 | |
| richardparker | 0:839ecbf5cb2a | 220 | // Horizontal |
| richardparker | 0:839ecbf5cb2a | 221 | unsigned short vsa = x; |
| richardparker | 0:839ecbf5cb2a | 222 | unsigned short vea = x + w - 1; |
| richardparker | 0:839ecbf5cb2a | 223 | |
| richardparker | 0:839ecbf5cb2a | 224 | _writeToRegister(0x45, vsa); |
| richardparker | 0:839ecbf5cb2a | 225 | _writeToRegister(0x46, vea); |
| richardparker | 0:839ecbf5cb2a | 226 | } |
| richardparker | 0:839ecbf5cb2a | 227 | |
| richardparker | 0:839ecbf5cb2a | 228 | void EALCD::_getTouch(unsigned short& x, unsigned short& y, unsigned short& z1, unsigned short& z2) |
| richardparker | 0:839ecbf5cb2a | 229 | { |
| richardparker | 0:839ecbf5cb2a | 230 | // As about to change clock freq and so data is not valid for screen disable. |
| richardparker | 0:839ecbf5cb2a | 231 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 232 | |
| richardparker | 0:839ecbf5cb2a | 233 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 234 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 235 | z1 = 0; |
| richardparker | 0:839ecbf5cb2a | 236 | z2 = 0; |
| richardparker | 0:839ecbf5cb2a | 237 | |
| richardparker | 0:839ecbf5cb2a | 238 | // Set comm frequency to access touch screen. |
| richardparker | 0:839ecbf5cb2a | 239 | _comm.frequency(EALCD_TOUCH_FREQ); |
| richardparker | 0:839ecbf5cb2a | 240 | |
| richardparker | 0:839ecbf5cb2a | 241 | // Read the x value. |
| richardparker | 0:839ecbf5cb2a | 242 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 243 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 244 | |
| richardparker | 0:839ecbf5cb2a | 245 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 246 | // 0x50 = Set address to 3'b101 |
| richardparker | 0:839ecbf5cb2a | 247 | _comm.write(0x83 | 0x50 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 248 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 249 | x = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 250 | x = x | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 251 | x = x << 1; |
| richardparker | 0:839ecbf5cb2a | 252 | x = x >> 4; |
| richardparker | 0:839ecbf5cb2a | 253 | |
| richardparker | 0:839ecbf5cb2a | 254 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 255 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 256 | |
| richardparker | 0:839ecbf5cb2a | 257 | // Read the y value. |
| richardparker | 0:839ecbf5cb2a | 258 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 259 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 260 | |
| richardparker | 0:839ecbf5cb2a | 261 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 262 | // 0x50 = Set address to 3'b001 |
| richardparker | 0:839ecbf5cb2a | 263 | _comm.write(0x83 | 0x10 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 264 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 265 | y = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 266 | y = y | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 267 | y = y << 1; |
| richardparker | 0:839ecbf5cb2a | 268 | y = y >> 4; |
| richardparker | 0:839ecbf5cb2a | 269 | |
| richardparker | 0:839ecbf5cb2a | 270 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 271 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 272 | |
| richardparker | 0:839ecbf5cb2a | 273 | // Read the z1 value. |
| richardparker | 0:839ecbf5cb2a | 274 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 275 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 276 | |
| richardparker | 0:839ecbf5cb2a | 277 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 278 | // 0x50 = Set address to 3'b011 |
| richardparker | 0:839ecbf5cb2a | 279 | _comm.write(0x83 | 0x30 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 280 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 281 | z1 = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 282 | z1 = z1 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 283 | z1 = z1 << 1; |
| richardparker | 0:839ecbf5cb2a | 284 | z1 = z1 >> 4; |
| richardparker | 0:839ecbf5cb2a | 285 | |
| richardparker | 0:839ecbf5cb2a | 286 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 287 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 288 | |
| richardparker | 0:839ecbf5cb2a | 289 | // Read the z2 value. |
| richardparker | 0:839ecbf5cb2a | 290 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 291 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 292 | |
| richardparker | 0:839ecbf5cb2a | 293 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 294 | // 0x50 = Set address to 3'b100 |
| richardparker | 0:839ecbf5cb2a | 295 | _comm.write(0x83 | 0x40 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 296 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 297 | z2 = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 298 | z2 = z2 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 299 | z2 = z2 << 1; |
| richardparker | 0:839ecbf5cb2a | 300 | z2 = z2 >> 4; |
| richardparker | 0:839ecbf5cb2a | 301 | |
| richardparker | 0:839ecbf5cb2a | 302 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 303 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 304 | |
| richardparker | 0:839ecbf5cb2a | 305 | // Set comm frequency to access lcd. |
| richardparker | 0:839ecbf5cb2a | 306 | _comm.frequency(EALCD_LCD_FREQ); |
| richardparker | 0:839ecbf5cb2a | 307 | } |
| richardparker | 0:839ecbf5cb2a | 308 | |
| richardparker | 0:839ecbf5cb2a | 309 | void EALCD::_drawPoint(short x, short y, unsigned short c) |
| richardparker | 0:839ecbf5cb2a | 310 | { |
| richardparker | 0:839ecbf5cb2a | 311 | // No need to draw if off screen. |
| richardparker | 0:839ecbf5cb2a | 312 | if ((x >= width()) |
| richardparker | 0:839ecbf5cb2a | 313 | || |
| richardparker | 0:839ecbf5cb2a | 314 | (y >= height()) |
| richardparker | 0:839ecbf5cb2a | 315 | || |
| richardparker | 0:839ecbf5cb2a | 316 | (x < 0) |
| richardparker | 0:839ecbf5cb2a | 317 | || |
| richardparker | 0:839ecbf5cb2a | 318 | (y < 0)) |
| richardparker | 0:839ecbf5cb2a | 319 | { |
| richardparker | 0:839ecbf5cb2a | 320 | return; |
| richardparker | 0:839ecbf5cb2a | 321 | } |
| richardparker | 0:839ecbf5cb2a | 322 | |
| richardparker | 0:839ecbf5cb2a | 323 | // Move to the position on the screen to place the pixel. |
| richardparker | 0:839ecbf5cb2a | 324 | _moveTo(x, y); |
| richardparker | 0:839ecbf5cb2a | 325 | |
| richardparker | 0:839ecbf5cb2a | 326 | // Draw the pixel with the current pen value. |
| richardparker | 0:839ecbf5cb2a | 327 | _writeToDisplay(c); |
| richardparker | 0:839ecbf5cb2a | 328 | } |
| richardparker | 0:839ecbf5cb2a | 329 | |
| richardparker | 0:839ecbf5cb2a | 330 | void EALCD::_swap(short& i, short& j) |
| richardparker | 0:839ecbf5cb2a | 331 | { |
| richardparker | 0:839ecbf5cb2a | 332 | short temp = i; |
| richardparker | 0:839ecbf5cb2a | 333 | i = j; |
| richardparker | 0:839ecbf5cb2a | 334 | j = temp; |
| richardparker | 0:839ecbf5cb2a | 335 | } |
| richardparker | 0:839ecbf5cb2a | 336 | |
| richardparker | 0:839ecbf5cb2a | 337 | void EALCD::_draw4EllipsePoints(short cX, short cY, short x, short y, bool filled) |
| richardparker | 0:839ecbf5cb2a | 338 | { |
| richardparker | 0:839ecbf5cb2a | 339 | if (filled == true) |
| richardparker | 0:839ecbf5cb2a | 340 | { |
| richardparker | 0:839ecbf5cb2a | 341 | // line in quadrant 2 to 1. |
| richardparker | 0:839ecbf5cb2a | 342 | _drawLine(cX-x, cY+y, cX+x, cY+y, _brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 343 | // Point in quadrant 3 to 4. |
| richardparker | 0:839ecbf5cb2a | 344 | _drawLine(cX-x, cY-y, cX+x, cY-y, _brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 345 | } else { |
| richardparker | 0:839ecbf5cb2a | 346 | // Point in quadrant 1. |
| richardparker | 0:839ecbf5cb2a | 347 | _drawPoint(cX+x, cY+y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 348 | // Point in quadrant 2. |
| richardparker | 0:839ecbf5cb2a | 349 | _drawPoint(cX-x, cY+y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 350 | // Point in quadrant 3. |
| richardparker | 0:839ecbf5cb2a | 351 | _drawPoint(cX-x, cY-y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 352 | // Point in quadrant 4. |
| richardparker | 0:839ecbf5cb2a | 353 | _drawPoint(cX+x, cY-y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 354 | } |
| richardparker | 0:839ecbf5cb2a | 355 | } |
| richardparker | 0:839ecbf5cb2a | 356 | |
| richardparker | 0:839ecbf5cb2a | 357 | void EALCD::_drawEllipse(short x, short y, unsigned short w, unsigned short h, bool filled) |
| richardparker | 0:839ecbf5cb2a | 358 | { |
| richardparker | 0:839ecbf5cb2a | 359 | // Algorithm taken from http://homepage.smc.edu/kennedy_john/belipse.pdf |
| richardparker | 0:839ecbf5cb2a | 360 | short xRadius = w/2; |
| richardparker | 0:839ecbf5cb2a | 361 | short yRadius = h/2; |
| richardparker | 0:839ecbf5cb2a | 362 | short cX = x + xRadius; |
| richardparker | 0:839ecbf5cb2a | 363 | short cY = y + yRadius; |
| richardparker | 0:839ecbf5cb2a | 364 | |
| richardparker | 0:839ecbf5cb2a | 365 | int xChange = yRadius*yRadius*(1 - 2*xRadius); |
| richardparker | 0:839ecbf5cb2a | 366 | int yChange = xRadius*xRadius; |
| richardparker | 0:839ecbf5cb2a | 367 | int ellipseError = 0; |
| richardparker | 0:839ecbf5cb2a | 368 | int twoASquare = 2*xRadius*xRadius; |
| richardparker | 0:839ecbf5cb2a | 369 | int twoBSquare = 2*yRadius*yRadius; |
| richardparker | 0:839ecbf5cb2a | 370 | int stoppingX = twoBSquare*xRadius; |
| richardparker | 0:839ecbf5cb2a | 371 | int stoppingY = 0; |
| richardparker | 0:839ecbf5cb2a | 372 | |
| richardparker | 0:839ecbf5cb2a | 373 | x = xRadius; |
| richardparker | 0:839ecbf5cb2a | 374 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 375 | |
| richardparker | 0:839ecbf5cb2a | 376 | while (stoppingX >= stoppingY) |
| richardparker | 0:839ecbf5cb2a | 377 | { |
| richardparker | 0:839ecbf5cb2a | 378 | // 1st set of points, y' > -1. |
| richardparker | 0:839ecbf5cb2a | 379 | _draw4EllipsePoints(cX, cY, x, y, filled); |
| richardparker | 0:839ecbf5cb2a | 380 | y += 1; |
| richardparker | 0:839ecbf5cb2a | 381 | stoppingY += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 382 | ellipseError += yChange; |
| richardparker | 0:839ecbf5cb2a | 383 | yChange += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 384 | if ((2*ellipseError + yChange) > 0) |
| richardparker | 0:839ecbf5cb2a | 385 | { |
| richardparker | 0:839ecbf5cb2a | 386 | x -= 1; |
| richardparker | 0:839ecbf5cb2a | 387 | stoppingX -= twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 388 | ellipseError += xChange; |
| richardparker | 0:839ecbf5cb2a | 389 | xChange += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 390 | } |
| richardparker | 0:839ecbf5cb2a | 391 | } |
| richardparker | 0:839ecbf5cb2a | 392 | |
| richardparker | 0:839ecbf5cb2a | 393 | // 1st point set is done; start the 2nd set of points. |
| richardparker | 0:839ecbf5cb2a | 394 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 395 | y = yRadius-1; |
| richardparker | 0:839ecbf5cb2a | 396 | xChange = yRadius*yRadius; |
| richardparker | 0:839ecbf5cb2a | 397 | yChange = xRadius*xRadius*(1 - 2*yRadius); |
| richardparker | 0:839ecbf5cb2a | 398 | ellipseError = 0; |
| richardparker | 0:839ecbf5cb2a | 399 | stoppingX = 0; |
| richardparker | 0:839ecbf5cb2a | 400 | stoppingY = twoASquare*yRadius; |
| richardparker | 0:839ecbf5cb2a | 401 | |
| richardparker | 0:839ecbf5cb2a | 402 | while (stoppingX <= stoppingY) |
| richardparker | 0:839ecbf5cb2a | 403 | { |
| richardparker | 0:839ecbf5cb2a | 404 | // 2nd set of points, y' < -1. |
| richardparker | 0:839ecbf5cb2a | 405 | _draw4EllipsePoints(cX, cY, x, y, filled); |
| richardparker | 0:839ecbf5cb2a | 406 | x += 1; |
| richardparker | 0:839ecbf5cb2a | 407 | stoppingX += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 408 | ellipseError += xChange; |
| richardparker | 0:839ecbf5cb2a | 409 | xChange += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 410 | |
| richardparker | 0:839ecbf5cb2a | 411 | if ((2*ellipseError + yChange) > 0) |
| richardparker | 0:839ecbf5cb2a | 412 | { |
| richardparker | 0:839ecbf5cb2a | 413 | y -= 1; |
| richardparker | 0:839ecbf5cb2a | 414 | stoppingY -= twoASquare; |
| richardparker | 0:839ecbf5cb2a | 415 | ellipseError += yChange; |
| richardparker | 0:839ecbf5cb2a | 416 | yChange += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 417 | } |
| richardparker | 0:839ecbf5cb2a | 418 | } |
| richardparker | 0:839ecbf5cb2a | 419 | } |
| richardparker | 0:839ecbf5cb2a | 420 | |
| richardparker | 0:839ecbf5cb2a | 421 | void EALCD::_drawLine(short x0, short y0, short x1, short y1, unsigned short c) |
| richardparker | 0:839ecbf5cb2a | 422 | { |
| richardparker | 0:839ecbf5cb2a | 423 | // Check if can be done faster. |
| richardparker | 3:24fbf4dbd7e5 | 424 | /* |
| richardparker | 0:839ecbf5cb2a | 425 | if (y0 == y1) |
| richardparker | 0:839ecbf5cb2a | 426 | { |
| richardparker | 0:839ecbf5cb2a | 427 | // Not on screen so don't draw. |
| richardparker | 0:839ecbf5cb2a | 428 | if ((y0 >= height()) || (y0 < 0)) |
| richardparker | 0:839ecbf5cb2a | 429 | { |
| richardparker | 0:839ecbf5cb2a | 430 | return; |
| richardparker | 0:839ecbf5cb2a | 431 | } |
| richardparker | 0:839ecbf5cb2a | 432 | |
| richardparker | 0:839ecbf5cb2a | 433 | // Horizontal line. |
| richardparker | 0:839ecbf5cb2a | 434 | unsigned short sx = (x0 < x1) ? x0 : x1; |
| richardparker | 0:839ecbf5cb2a | 435 | unsigned short length = abs(x1 - x0); |
| richardparker | 0:839ecbf5cb2a | 436 | |
| richardparker | 0:839ecbf5cb2a | 437 | // Make sure not going off edge of screen. |
| richardparker | 0:839ecbf5cb2a | 438 | if (sx+length > width()) |
| richardparker | 0:839ecbf5cb2a | 439 | { |
| richardparker | 0:839ecbf5cb2a | 440 | length = width()-sx; |
| richardparker | 0:839ecbf5cb2a | 441 | } |
| richardparker | 0:839ecbf5cb2a | 442 | |
| richardparker | 0:839ecbf5cb2a | 443 | // Move to start of line and just draw. |
| richardparker | 0:839ecbf5cb2a | 444 | _moveTo(sx, y0); |
| richardparker | 0:839ecbf5cb2a | 445 | for (int i = 0; i < length; i++) |
| richardparker | 0:839ecbf5cb2a | 446 | { |
| richardparker | 0:839ecbf5cb2a | 447 | _writeToDisplay(c); |
| richardparker | 0:839ecbf5cb2a | 448 | } |
| richardparker | 0:839ecbf5cb2a | 449 | |
| richardparker | 0:839ecbf5cb2a | 450 | return; |
| richardparker | 0:839ecbf5cb2a | 451 | } |
| richardparker | 3:24fbf4dbd7e5 | 452 | */ |
| richardparker | 0:839ecbf5cb2a | 453 | |
| richardparker | 0:839ecbf5cb2a | 454 | // This code is from http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm - the fast section i.e. |
| richardparker | 0:839ecbf5cb2a | 455 | // relies on only integer maths. |
| richardparker | 0:839ecbf5cb2a | 456 | |
| richardparker | 0:839ecbf5cb2a | 457 | bool steep = (abs(y1 - y0) > abs(x1 - x0)); |
| richardparker | 0:839ecbf5cb2a | 458 | |
| richardparker | 0:839ecbf5cb2a | 459 | if (steep == true) |
| richardparker | 0:839ecbf5cb2a | 460 | { |
| richardparker | 0:839ecbf5cb2a | 461 | _swap(x0, y0); |
| richardparker | 0:839ecbf5cb2a | 462 | _swap(x1, y1); |
| richardparker | 0:839ecbf5cb2a | 463 | } |
| richardparker | 0:839ecbf5cb2a | 464 | |
| richardparker | 0:839ecbf5cb2a | 465 | if (x0 > x1) |
| richardparker | 0:839ecbf5cb2a | 466 | { |
| richardparker | 0:839ecbf5cb2a | 467 | _swap(x0, x1); |
| richardparker | 0:839ecbf5cb2a | 468 | _swap(y0, y1); |
| richardparker | 0:839ecbf5cb2a | 469 | } |
| richardparker | 0:839ecbf5cb2a | 470 | |
| richardparker | 0:839ecbf5cb2a | 471 | int deltaX = x1 - x0; |
| richardparker | 0:839ecbf5cb2a | 472 | int deltaY = abs(y1 - y0); |
| richardparker | 0:839ecbf5cb2a | 473 | int error = deltaX / 2; |
| richardparker | 0:839ecbf5cb2a | 474 | int yStep; |
| richardparker | 0:839ecbf5cb2a | 475 | int y = y0; |
| richardparker | 0:839ecbf5cb2a | 476 | int x = 0; |
| richardparker | 0:839ecbf5cb2a | 477 | |
| richardparker | 0:839ecbf5cb2a | 478 | if (y0 < y1) |
| richardparker | 0:839ecbf5cb2a | 479 | { |
| richardparker | 0:839ecbf5cb2a | 480 | yStep = 1; |
| richardparker | 0:839ecbf5cb2a | 481 | } else { |
| richardparker | 0:839ecbf5cb2a | 482 | yStep = -1; |
| richardparker | 0:839ecbf5cb2a | 483 | } |
| richardparker | 0:839ecbf5cb2a | 484 | |
| richardparker | 0:839ecbf5cb2a | 485 | // Now actually loop and draw the line. |
| richardparker | 0:839ecbf5cb2a | 486 | for (x = x0; x < x1; x++) |
| richardparker | 0:839ecbf5cb2a | 487 | { |
| richardparker | 0:839ecbf5cb2a | 488 | // Channge drawing if drawing horizontal or vertical. |
| richardparker | 0:839ecbf5cb2a | 489 | if (steep == true) |
| richardparker | 0:839ecbf5cb2a | 490 | { |
| richardparker | 0:839ecbf5cb2a | 491 | _drawPoint(y, x, c); |
| richardparker | 0:839ecbf5cb2a | 492 | } else { |
| richardparker | 0:839ecbf5cb2a | 493 | _drawPoint(x, y, c); |
| richardparker | 0:839ecbf5cb2a | 494 | } |
| richardparker | 0:839ecbf5cb2a | 495 | |
| richardparker | 0:839ecbf5cb2a | 496 | // Calculate the error to decide to step or not. |
| richardparker | 0:839ecbf5cb2a | 497 | error = error - deltaY; |
| richardparker | 0:839ecbf5cb2a | 498 | |
| richardparker | 0:839ecbf5cb2a | 499 | if (error < 0) |
| richardparker | 0:839ecbf5cb2a | 500 | { |
| richardparker | 0:839ecbf5cb2a | 501 | y = y + yStep; |
| richardparker | 0:839ecbf5cb2a | 502 | error = error + deltaX; |
| richardparker | 0:839ecbf5cb2a | 503 | } |
| richardparker | 0:839ecbf5cb2a | 504 | } |
| richardparker | 0:839ecbf5cb2a | 505 | } |
| richardparker | 0:839ecbf5cb2a | 506 | |
| richardparker | 0:839ecbf5cb2a | 507 | void EALCD::clearScreen() |
| richardparker | 0:839ecbf5cb2a | 508 | { |
| richardparker | 0:839ecbf5cb2a | 509 | // First move to the top left. |
| richardparker | 0:839ecbf5cb2a | 510 | _window(0, 0, width(), height()); |
| richardparker | 0:839ecbf5cb2a | 511 | _moveTo(0, 0); |
| richardparker | 0:839ecbf5cb2a | 512 | |
| richardparker | 0:839ecbf5cb2a | 513 | // Now fill in relying on the addresses to be automatically updated. |
| richardparker | 0:839ecbf5cb2a | 514 | for(int i = 0; i < (width()*height()); i++) |
| richardparker | 0:839ecbf5cb2a | 515 | { |
| richardparker | 0:839ecbf5cb2a | 516 | _writeToDisplay(_brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 517 | } |
| richardparker | 0:839ecbf5cb2a | 518 | } |
| richardparker | 0:839ecbf5cb2a | 519 | |
| richardparker | 0:839ecbf5cb2a | 520 | void EALCD::drawPoint(short x, short y) |
| richardparker | 0:839ecbf5cb2a | 521 | { |
| richardparker | 0:839ecbf5cb2a | 522 | // Draw the pixel with the current pen value. |
| richardparker | 0:839ecbf5cb2a | 523 | _drawPoint(x, y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 524 | } |
| richardparker | 0:839ecbf5cb2a | 525 | |
| richardparker | 0:839ecbf5cb2a | 526 | void EALCD::drawLine(short x0, short y0, short x1, short y1) |
| richardparker | 0:839ecbf5cb2a | 527 | { |
| richardparker | 0:839ecbf5cb2a | 528 | _drawLine(x0, y0, x1, y1, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 529 | } |
| richardparker | 0:839ecbf5cb2a | 530 | |
| richardparker | 0:839ecbf5cb2a | 531 | void EALCD::drawRect(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 532 | { |
| richardparker | 0:839ecbf5cb2a | 533 | // Draw the top horizontal line. |
| richardparker | 0:839ecbf5cb2a | 534 | drawLine(x, y, x + w - 1, y); |
| richardparker | 0:839ecbf5cb2a | 535 | |
| richardparker | 0:839ecbf5cb2a | 536 | // Draw the bottom horizontal line. |
| richardparker | 0:839ecbf5cb2a | 537 | drawLine(x, y + h - 1, x + w - 1, y + h - 1); |
| richardparker | 0:839ecbf5cb2a | 538 | |
| richardparker | 0:839ecbf5cb2a | 539 | // Draw the left vertical line. |
| richardparker | 0:839ecbf5cb2a | 540 | drawLine(x, y, x, y + h - 1); |
| richardparker | 0:839ecbf5cb2a | 541 | |
| richardparker | 0:839ecbf5cb2a | 542 | // Draw the right vertical line. |
| richardparker | 0:839ecbf5cb2a | 543 | drawLine(x + w - 1, y, x + w - 1, y + h); |
| richardparker | 0:839ecbf5cb2a | 544 | } |
| richardparker | 0:839ecbf5cb2a | 545 | |
| richardparker | 0:839ecbf5cb2a | 546 | void EALCD::drawFilledRect(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 547 | { |
| richardparker | 0:839ecbf5cb2a | 548 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 549 | { |
| richardparker | 0:839ecbf5cb2a | 550 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 551 | } |
| richardparker | 0:839ecbf5cb2a | 552 | |
| richardparker | 0:839ecbf5cb2a | 553 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 554 | { |
| richardparker | 0:839ecbf5cb2a | 555 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 556 | } |
| richardparker | 0:839ecbf5cb2a | 557 | |
| richardparker | 0:839ecbf5cb2a | 558 | // Set the window so that automatically wrap and go inside the box. |
| richardparker | 0:839ecbf5cb2a | 559 | _window(x, y, w, h); |
| richardparker | 0:839ecbf5cb2a | 560 | _moveTo(x, y); |
| richardparker | 0:839ecbf5cb2a | 561 | |
| richardparker | 0:839ecbf5cb2a | 562 | for (int i = 0; i < (w*h); i++) |
| richardparker | 0:839ecbf5cb2a | 563 | { |
| richardparker | 0:839ecbf5cb2a | 564 | _writeToDisplay(_brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 565 | } |
| richardparker | 0:839ecbf5cb2a | 566 | |
| richardparker | 0:839ecbf5cb2a | 567 | drawRect(x, y, w, h); |
| richardparker | 3:24fbf4dbd7e5 | 568 | |
| richardparker | 3:24fbf4dbd7e5 | 569 | // Reset window to whole of the screen. |
| richardparker | 3:24fbf4dbd7e5 | 570 | _window(0, 0, width(), height()); |
| richardparker | 0:839ecbf5cb2a | 571 | } |
| richardparker | 0:839ecbf5cb2a | 572 | |
| richardparker | 0:839ecbf5cb2a | 573 | |
| richardparker | 0:839ecbf5cb2a | 574 | void EALCD::drawEllipse(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 575 | { |
| richardparker | 0:839ecbf5cb2a | 576 | _drawEllipse(x, y, w, h, false); |
| richardparker | 0:839ecbf5cb2a | 577 | } |
| richardparker | 0:839ecbf5cb2a | 578 | |
| richardparker | 0:839ecbf5cb2a | 579 | void EALCD::drawFilledEllipse(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 580 | { |
| richardparker | 0:839ecbf5cb2a | 581 | _drawEllipse(x, y, w, h, true); |
| richardparker | 0:839ecbf5cb2a | 582 | _drawEllipse(x, y, w, h, false); |
| richardparker | 0:839ecbf5cb2a | 583 | } |
| richardparker | 0:839ecbf5cb2a | 584 | |
| richardparker | 0:839ecbf5cb2a | 585 | void EALCD::drawImage(unsigned short x, unsigned short y, EAImage& img) |
| richardparker | 0:839ecbf5cb2a | 586 | { |
| richardparker | 0:839ecbf5cb2a | 587 | // Don't try painting an invalid image. |
| richardparker | 0:839ecbf5cb2a | 588 | if (img.isValid() == false) |
| richardparker | 0:839ecbf5cb2a | 589 | { |
| richardparker | 0:839ecbf5cb2a | 590 | return; |
| richardparker | 0:839ecbf5cb2a | 591 | } |
| richardparker | 0:839ecbf5cb2a | 592 | |
| richardparker | 0:839ecbf5cb2a | 593 | // Set the position to draw. |
| richardparker | 0:839ecbf5cb2a | 594 | img.setX(x); |
| richardparker | 0:839ecbf5cb2a | 595 | img.setY(y); |
| richardparker | 0:839ecbf5cb2a | 596 | |
| richardparker | 0:839ecbf5cb2a | 597 | // Draw the image. |
| richardparker | 0:839ecbf5cb2a | 598 | img.paint(*this); |
| richardparker | 0:839ecbf5cb2a | 599 | } |
| richardparker | 0:839ecbf5cb2a | 600 | |
| richardparker | 0:839ecbf5cb2a | 601 | void EALCD::drawText(unsigned short x, unsigned short y, char* text) |
| richardparker | 0:839ecbf5cb2a | 602 | { |
| richardparker | 0:839ecbf5cb2a | 603 | // Don't try painting with an invalid font or no text |
| richardparker | 0:839ecbf5cb2a | 604 | if ((_font.isValid() == false) || (text == NULL)) |
| richardparker | 0:839ecbf5cb2a | 605 | { |
| richardparker | 0:839ecbf5cb2a | 606 | return; |
| richardparker | 0:839ecbf5cb2a | 607 | } |
| richardparker | 0:839ecbf5cb2a | 608 | |
| richardparker | 0:839ecbf5cb2a | 609 | EAImage img; |
| richardparker | 0:839ecbf5cb2a | 610 | EAFont::EACharacter detail; |
| richardparker | 0:839ecbf5cb2a | 611 | |
| richardparker | 0:839ecbf5cb2a | 612 | img.load(_font.path()); |
| richardparker | 1:f04bcaea1d60 | 613 | // Treat the font image as a mask to allow pen colour to be used for the text. |
| richardparker | 1:f04bcaea1d60 | 614 | img.setMask(true); |
| richardparker | 0:839ecbf5cb2a | 615 | |
| richardparker | 0:839ecbf5cb2a | 616 | for (int i = 0; i < strlen(text); i++) |
| richardparker | 0:839ecbf5cb2a | 617 | { |
| richardparker | 0:839ecbf5cb2a | 618 | if (_font.getCharacter(text[i], detail) == true) |
| richardparker | 0:839ecbf5cb2a | 619 | { |
| richardparker | 0:839ecbf5cb2a | 620 | img.setX(x+detail.xOffset); |
| richardparker | 0:839ecbf5cb2a | 621 | img.setY(y+detail.yOffset); |
| richardparker | 0:839ecbf5cb2a | 622 | img.paint(*this, detail.x, detail.y, detail.width, detail.height); |
| richardparker | 0:839ecbf5cb2a | 623 | |
| richardparker | 0:839ecbf5cb2a | 624 | x += detail.xAdvance; |
| richardparker | 0:839ecbf5cb2a | 625 | } else { |
| richardparker | 0:839ecbf5cb2a | 626 | // Character is unrecognised. |
| richardparker | 0:839ecbf5cb2a | 627 | } |
| richardparker | 0:839ecbf5cb2a | 628 | } |
| richardparker | 0:839ecbf5cb2a | 629 | } |
| richardparker | 1:f04bcaea1d60 | 630 | |
| richardparker | 1:f04bcaea1d60 | 631 | void EALCD::noop() |
| richardparker | 1:f04bcaea1d60 | 632 | { |
| richardparker | 1:f04bcaea1d60 | 633 | // Turn off the mask so that nothing written. |
| richardparker | 1:f04bcaea1d60 | 634 | _writeToRegister(0x23, 0xfcfc); |
| richardparker | 1:f04bcaea1d60 | 635 | _writeToRegister(0x24, 0x00fc); |
| richardparker | 1:f04bcaea1d60 | 636 | |
| richardparker | 1:f04bcaea1d60 | 637 | // Write blank to increment address. |
| richardparker | 1:f04bcaea1d60 | 638 | _writeToDisplay(0x0000); |
| richardparker | 1:f04bcaea1d60 | 639 | |
| richardparker | 1:f04bcaea1d60 | 640 | // Turn mask back on. |
| richardparker | 1:f04bcaea1d60 | 641 | _writeToRegister(0x23, 0x0000); |
| richardparker | 1:f04bcaea1d60 | 642 | _writeToRegister(0x24, 0x0000); |
| richardparker | 1:f04bcaea1d60 | 643 | } |