Richard Parker
/
EALCD
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screen/EALCD.cpp@1:f04bcaea1d60, 2010-03-04 (annotated)
- Committer:
- richardparker
- Date:
- Thu Mar 04 10:54:06 2010 +0000
- Revision:
- 1:f04bcaea1d60
- Parent:
- 0:839ecbf5cb2a
- Child:
- 3:24fbf4dbd7e5
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 | 0:839ecbf5cb2a | 22 | _tch_cs(TCH_CS) |
| richardparker | 0:839ecbf5cb2a | 23 | { |
| richardparker | 0:839ecbf5cb2a | 24 | // Make sure not selecting either chip. |
| richardparker | 0:839ecbf5cb2a | 25 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 26 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 27 | |
| richardparker | 0:839ecbf5cb2a | 28 | // Set the frequency of the PWM backlight to have a period ~400us. |
| richardparker | 0:839ecbf5cb2a | 29 | _backlight.period_us(400); |
| richardparker | 0:839ecbf5cb2a | 30 | // By default 40% on. |
| richardparker | 0:839ecbf5cb2a | 31 | setBrightness(0.4); |
| richardparker | 0:839ecbf5cb2a | 32 | |
| richardparker | 0:839ecbf5cb2a | 33 | // Set up comms, 8 bit interface. |
| richardparker | 0:839ecbf5cb2a | 34 | _comm.format(8); |
| richardparker | 0:839ecbf5cb2a | 35 | _comm.frequency(EALCD_LCD_FREQ); |
| richardparker | 0:839ecbf5cb2a | 36 | |
| richardparker | 0:839ecbf5cb2a | 37 | // Now actual initialise the connection. |
| richardparker | 0:839ecbf5cb2a | 38 | _initialise(); |
| richardparker | 0:839ecbf5cb2a | 39 | } |
| richardparker | 0:839ecbf5cb2a | 40 | |
| richardparker | 0:839ecbf5cb2a | 41 | EALCD::~EALCD() |
| richardparker | 0:839ecbf5cb2a | 42 | { |
| richardparker | 0:839ecbf5cb2a | 43 | } |
| richardparker | 0:839ecbf5cb2a | 44 | |
| richardparker | 0:839ecbf5cb2a | 45 | void EALCD::setBrightness(float percentage) |
| richardparker | 0:839ecbf5cb2a | 46 | { |
| richardparker | 0:839ecbf5cb2a | 47 | // Check the value is within the correct range. |
| richardparker | 0:839ecbf5cb2a | 48 | if (percentage < 0) |
| richardparker | 0:839ecbf5cb2a | 49 | { |
| richardparker | 0:839ecbf5cb2a | 50 | percentage = 0; |
| richardparker | 0:839ecbf5cb2a | 51 | } |
| richardparker | 0:839ecbf5cb2a | 52 | else if (percentage > 1) |
| richardparker | 0:839ecbf5cb2a | 53 | { |
| richardparker | 0:839ecbf5cb2a | 54 | percentage = 1; |
| richardparker | 0:839ecbf5cb2a | 55 | } |
| richardparker | 0:839ecbf5cb2a | 56 | |
| richardparker | 0:839ecbf5cb2a | 57 | _backlight = 1-percentage; |
| richardparker | 0:839ecbf5cb2a | 58 | } |
| richardparker | 0:839ecbf5cb2a | 59 | |
| richardparker | 0:839ecbf5cb2a | 60 | void EALCD::_writeToDisplay(unsigned short data) |
| richardparker | 0:839ecbf5cb2a | 61 | { |
| richardparker | 0:839ecbf5cb2a | 62 | // Set RS which is connected to DC and so when high is to data. |
| richardparker | 0:839ecbf5cb2a | 63 | _rs = 1; |
| richardparker | 0:839ecbf5cb2a | 64 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 65 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 66 | |
| richardparker | 0:839ecbf5cb2a | 67 | // Write the msb data. |
| richardparker | 0:839ecbf5cb2a | 68 | _comm.write(data >> 8); |
| richardparker | 0:839ecbf5cb2a | 69 | // Write the lsb data. |
| richardparker | 0:839ecbf5cb2a | 70 | _comm.write(data & 0xff); |
| richardparker | 0:839ecbf5cb2a | 71 | |
| richardparker | 0:839ecbf5cb2a | 72 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 73 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 74 | } |
| richardparker | 0:839ecbf5cb2a | 75 | |
| richardparker | 0:839ecbf5cb2a | 76 | void EALCD::_writeToRegister(unsigned short addr, unsigned short data) |
| richardparker | 0:839ecbf5cb2a | 77 | { |
| richardparker | 0:839ecbf5cb2a | 78 | // Command phase. |
| richardparker | 0:839ecbf5cb2a | 79 | // Set RS which is connected to DC and so when low is to command. |
| richardparker | 0:839ecbf5cb2a | 80 | _rs = 0; |
| richardparker | 0:839ecbf5cb2a | 81 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 82 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 83 | |
| richardparker | 0:839ecbf5cb2a | 84 | // Write the msb address. |
| richardparker | 0:839ecbf5cb2a | 85 | _comm.write(addr >> 8); |
| richardparker | 0:839ecbf5cb2a | 86 | // Write the lsb address. |
| richardparker | 0:839ecbf5cb2a | 87 | _comm.write(addr & 0xff); |
| richardparker | 0:839ecbf5cb2a | 88 | |
| richardparker | 0:839ecbf5cb2a | 89 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 90 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 91 | |
| richardparker | 0:839ecbf5cb2a | 92 | // Data phase. |
| richardparker | 0:839ecbf5cb2a | 93 | // Set RS which is connected to DC and so when high is data. |
| richardparker | 0:839ecbf5cb2a | 94 | _rs = 1; |
| richardparker | 0:839ecbf5cb2a | 95 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 96 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 97 | |
| richardparker | 0:839ecbf5cb2a | 98 | // Write the msb data. |
| richardparker | 0:839ecbf5cb2a | 99 | _comm.write(data >> 8); |
| richardparker | 0:839ecbf5cb2a | 100 | // Write the lsb data. |
| richardparker | 0:839ecbf5cb2a | 101 | _comm.write(data & 0xff); |
| richardparker | 0:839ecbf5cb2a | 102 | |
| richardparker | 0:839ecbf5cb2a | 103 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 104 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 105 | |
| richardparker | 0:839ecbf5cb2a | 106 | // Restore index to GRAM by accessing GRAM register. |
| richardparker | 0:839ecbf5cb2a | 107 | // Set RS which is connected to DC and so when low is to command. |
| richardparker | 0:839ecbf5cb2a | 108 | _rs = 0; |
| richardparker | 0:839ecbf5cb2a | 109 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 110 | _cs = 0; |
| richardparker | 0:839ecbf5cb2a | 111 | |
| richardparker | 0:839ecbf5cb2a | 112 | // Write the msb address. |
| richardparker | 0:839ecbf5cb2a | 113 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 114 | // Write the lsb address. |
| richardparker | 0:839ecbf5cb2a | 115 | _comm.write(0x22); |
| richardparker | 0:839ecbf5cb2a | 116 | |
| richardparker | 0:839ecbf5cb2a | 117 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 118 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 119 | } |
| richardparker | 0:839ecbf5cb2a | 120 | |
| richardparker | 0:839ecbf5cb2a | 121 | void EALCD::_initialise() |
| richardparker | 0:839ecbf5cb2a | 122 | { |
| richardparker | 0:839ecbf5cb2a | 123 | // Start up sequence. See page 72 of SSD1289 V1.3 datasheet for reasons. |
| richardparker | 0:839ecbf5cb2a | 124 | _writeToRegister(0x07, 0x0021); |
| richardparker | 0:839ecbf5cb2a | 125 | // Oscillator on. |
| richardparker | 0:839ecbf5cb2a | 126 | _writeToRegister(0x00, 0x0001); |
| richardparker | 0:839ecbf5cb2a | 127 | _writeToRegister(0x07, 0x0723); |
| richardparker | 0:839ecbf5cb2a | 128 | // Exit sleep mode |
| richardparker | 0:839ecbf5cb2a | 129 | _writeToRegister(0x10, 0x0000); |
| richardparker | 0:839ecbf5cb2a | 130 | // Pause 200ms (need at least 30ms). |
| richardparker | 0:839ecbf5cb2a | 131 | wait(0.2); |
| richardparker | 0:839ecbf5cb2a | 132 | _writeToRegister(0x07, 0x0033); |
| richardparker | 0:839ecbf5cb2a | 133 | // Setup screen orientation and colour mode etc. |
| richardparker | 0:839ecbf5cb2a | 134 | _writeToRegister(0x11, 0x6828); |
| richardparker | 0:839ecbf5cb2a | 135 | // LCD driving waveform. |
| richardparker | 0:839ecbf5cb2a | 136 | _writeToRegister(0x02, 0x0600); |
| richardparker | 0:839ecbf5cb2a | 137 | _writeToRegister(0x0f, 0x0000); |
| richardparker | 0:839ecbf5cb2a | 138 | // Driver output control. |
| richardparker | 0:839ecbf5cb2a | 139 | _writeToRegister(0x01, 0x2b3f); |
| richardparker | 0:839ecbf5cb2a | 140 | _writeToRegister(0x0b, 0x5308); |
| richardparker | 0:839ecbf5cb2a | 141 | // Set refresh rate to 70Hz. |
| richardparker | 0:839ecbf5cb2a | 142 | _writeToRegister(0x25, 0xa000); |
| richardparker | 0:839ecbf5cb2a | 143 | |
| richardparker | 0:839ecbf5cb2a | 144 | } |
| richardparker | 0:839ecbf5cb2a | 145 | |
| richardparker | 0:839ecbf5cb2a | 146 | void EALCD::_moveTo(short x, short y) |
| richardparker | 0:839ecbf5cb2a | 147 | { |
| richardparker | 0:839ecbf5cb2a | 148 | // Limit movement. |
| richardparker | 0:839ecbf5cb2a | 149 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 150 | { |
| richardparker | 0:839ecbf5cb2a | 151 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 152 | } |
| richardparker | 0:839ecbf5cb2a | 153 | |
| richardparker | 0:839ecbf5cb2a | 154 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 155 | { |
| richardparker | 0:839ecbf5cb2a | 156 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 157 | } |
| richardparker | 0:839ecbf5cb2a | 158 | |
| richardparker | 0:839ecbf5cb2a | 159 | if (x >= width()) |
| richardparker | 0:839ecbf5cb2a | 160 | { |
| richardparker | 0:839ecbf5cb2a | 161 | x = width()-1; |
| richardparker | 0:839ecbf5cb2a | 162 | } |
| richardparker | 0:839ecbf5cb2a | 163 | |
| richardparker | 0:839ecbf5cb2a | 164 | if (y >= height()) |
| richardparker | 0:839ecbf5cb2a | 165 | { |
| richardparker | 0:839ecbf5cb2a | 166 | y = height()-1; |
| richardparker | 0:839ecbf5cb2a | 167 | } |
| richardparker | 0:839ecbf5cb2a | 168 | |
| richardparker | 0:839ecbf5cb2a | 169 | // Masking values to prevent too large. |
| richardparker | 0:839ecbf5cb2a | 170 | x = x & 0x1ff; |
| richardparker | 0:839ecbf5cb2a | 171 | _writeToRegister(0x4f, x); |
| richardparker | 0:839ecbf5cb2a | 172 | |
| richardparker | 0:839ecbf5cb2a | 173 | // Mask to get down to a sensible number. |
| richardparker | 0:839ecbf5cb2a | 174 | y = y & 0xff; |
| richardparker | 0:839ecbf5cb2a | 175 | // -1 because pixel at top of screen is 239 (as 0 indexed therefore 240 high). |
| richardparker | 0:839ecbf5cb2a | 176 | y = height() - 1 - y; |
| richardparker | 0:839ecbf5cb2a | 177 | _writeToRegister(0x4e, y); |
| richardparker | 0:839ecbf5cb2a | 178 | } |
| richardparker | 0:839ecbf5cb2a | 179 | |
| richardparker | 0:839ecbf5cb2a | 180 | void EALCD::_window(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 181 | { |
| richardparker | 0:839ecbf5cb2a | 182 | // If start off screen then no need to even try drawing. |
| richardparker | 0:839ecbf5cb2a | 183 | if ((x >= width()) || (y >= height())) |
| richardparker | 0:839ecbf5cb2a | 184 | { |
| richardparker | 0:839ecbf5cb2a | 185 | return; |
| richardparker | 0:839ecbf5cb2a | 186 | } |
| richardparker | 0:839ecbf5cb2a | 187 | |
| richardparker | 0:839ecbf5cb2a | 188 | // Limit to not go off screen. |
| richardparker | 0:839ecbf5cb2a | 189 | if ((x + w) > width()) |
| richardparker | 0:839ecbf5cb2a | 190 | { |
| richardparker | 0:839ecbf5cb2a | 191 | w = width()-x; |
| richardparker | 0:839ecbf5cb2a | 192 | } |
| richardparker | 0:839ecbf5cb2a | 193 | |
| richardparker | 0:839ecbf5cb2a | 194 | if ((y + h) > height()) |
| richardparker | 0:839ecbf5cb2a | 195 | { |
| richardparker | 0:839ecbf5cb2a | 196 | h = height()-y; |
| richardparker | 0:839ecbf5cb2a | 197 | } |
| richardparker | 0:839ecbf5cb2a | 198 | |
| richardparker | 0:839ecbf5cb2a | 199 | // Move x and y to correct location. |
| richardparker | 0:839ecbf5cb2a | 200 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 201 | { |
| richardparker | 0:839ecbf5cb2a | 202 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 203 | } |
| richardparker | 0:839ecbf5cb2a | 204 | |
| richardparker | 0:839ecbf5cb2a | 205 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 206 | { |
| richardparker | 0:839ecbf5cb2a | 207 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 208 | } |
| richardparker | 0:839ecbf5cb2a | 209 | |
| richardparker | 0:839ecbf5cb2a | 210 | y = height() - 1 - y; |
| richardparker | 0:839ecbf5cb2a | 211 | |
| richardparker | 0:839ecbf5cb2a | 212 | // Vertical. |
| richardparker | 0:839ecbf5cb2a | 213 | unsigned short hsa = y - h + 1; |
| richardparker | 0:839ecbf5cb2a | 214 | unsigned short hea = y; |
| richardparker | 0:839ecbf5cb2a | 215 | hea = hea << 8; |
| richardparker | 0:839ecbf5cb2a | 216 | |
| richardparker | 0:839ecbf5cb2a | 217 | _writeToRegister(0x44, hsa | hea); |
| richardparker | 0:839ecbf5cb2a | 218 | |
| richardparker | 0:839ecbf5cb2a | 219 | // Horizontal |
| richardparker | 0:839ecbf5cb2a | 220 | unsigned short vsa = x; |
| richardparker | 0:839ecbf5cb2a | 221 | unsigned short vea = x + w - 1; |
| richardparker | 0:839ecbf5cb2a | 222 | |
| richardparker | 0:839ecbf5cb2a | 223 | _writeToRegister(0x45, vsa); |
| richardparker | 0:839ecbf5cb2a | 224 | _writeToRegister(0x46, vea); |
| richardparker | 0:839ecbf5cb2a | 225 | } |
| richardparker | 0:839ecbf5cb2a | 226 | |
| richardparker | 0:839ecbf5cb2a | 227 | void EALCD::_getTouch(unsigned short& x, unsigned short& y, unsigned short& z1, unsigned short& z2) |
| richardparker | 0:839ecbf5cb2a | 228 | { |
| richardparker | 0:839ecbf5cb2a | 229 | // As about to change clock freq and so data is not valid for screen disable. |
| richardparker | 0:839ecbf5cb2a | 230 | _cs = 1; |
| richardparker | 0:839ecbf5cb2a | 231 | |
| richardparker | 0:839ecbf5cb2a | 232 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 233 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 234 | z1 = 0; |
| richardparker | 0:839ecbf5cb2a | 235 | z2 = 0; |
| richardparker | 0:839ecbf5cb2a | 236 | |
| richardparker | 0:839ecbf5cb2a | 237 | // Set comm frequency to access touch screen. |
| richardparker | 0:839ecbf5cb2a | 238 | _comm.frequency(EALCD_TOUCH_FREQ); |
| richardparker | 0:839ecbf5cb2a | 239 | |
| richardparker | 0:839ecbf5cb2a | 240 | // Read the x value. |
| richardparker | 0:839ecbf5cb2a | 241 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 242 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 243 | |
| richardparker | 0:839ecbf5cb2a | 244 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 245 | // 0x50 = Set address to 3'b101 |
| richardparker | 0:839ecbf5cb2a | 246 | _comm.write(0x83 | 0x50 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 247 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 248 | x = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 249 | x = x | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 250 | x = x << 1; |
| richardparker | 0:839ecbf5cb2a | 251 | x = x >> 4; |
| richardparker | 0:839ecbf5cb2a | 252 | |
| richardparker | 0:839ecbf5cb2a | 253 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 254 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 255 | |
| richardparker | 0:839ecbf5cb2a | 256 | // Read the y value. |
| richardparker | 0:839ecbf5cb2a | 257 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 258 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 259 | |
| richardparker | 0:839ecbf5cb2a | 260 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 261 | // 0x50 = Set address to 3'b001 |
| richardparker | 0:839ecbf5cb2a | 262 | _comm.write(0x83 | 0x10 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 263 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 264 | y = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 265 | y = y | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 266 | y = y << 1; |
| richardparker | 0:839ecbf5cb2a | 267 | y = y >> 4; |
| richardparker | 0:839ecbf5cb2a | 268 | |
| richardparker | 0:839ecbf5cb2a | 269 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 270 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 271 | |
| richardparker | 0:839ecbf5cb2a | 272 | // Read the z1 value. |
| richardparker | 0:839ecbf5cb2a | 273 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 274 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 275 | |
| richardparker | 0:839ecbf5cb2a | 276 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 277 | // 0x50 = Set address to 3'b011 |
| richardparker | 0:839ecbf5cb2a | 278 | _comm.write(0x83 | 0x30 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 279 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 280 | z1 = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 281 | z1 = z1 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 282 | z1 = z1 << 1; |
| richardparker | 0:839ecbf5cb2a | 283 | z1 = z1 >> 4; |
| richardparker | 0:839ecbf5cb2a | 284 | |
| richardparker | 0:839ecbf5cb2a | 285 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 286 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 287 | |
| richardparker | 0:839ecbf5cb2a | 288 | // Read the z2 value. |
| richardparker | 0:839ecbf5cb2a | 289 | // Activate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 290 | _tch_cs = 0; |
| richardparker | 0:839ecbf5cb2a | 291 | |
| richardparker | 0:839ecbf5cb2a | 292 | // 0x83 = Set start bit high, power mode is 2'b11 (always on). |
| richardparker | 0:839ecbf5cb2a | 293 | // 0x50 = Set address to 3'b100 |
| richardparker | 0:839ecbf5cb2a | 294 | _comm.write(0x83 | 0x40 | 0x00); |
| richardparker | 0:839ecbf5cb2a | 295 | // Read two bytes in, the last 3 bits are uninteresting (12 bit reading). |
| richardparker | 0:839ecbf5cb2a | 296 | z2 = _comm.write(0x00) << 8; |
| richardparker | 0:839ecbf5cb2a | 297 | z2 = z2 | _comm.write(0x00); |
| richardparker | 0:839ecbf5cb2a | 298 | z2 = z2 << 1; |
| richardparker | 0:839ecbf5cb2a | 299 | z2 = z2 >> 4; |
| richardparker | 0:839ecbf5cb2a | 300 | |
| richardparker | 0:839ecbf5cb2a | 301 | // Deactivate the chip (active low). |
| richardparker | 0:839ecbf5cb2a | 302 | _tch_cs = 1; |
| richardparker | 0:839ecbf5cb2a | 303 | |
| richardparker | 0:839ecbf5cb2a | 304 | // Set comm frequency to access lcd. |
| richardparker | 0:839ecbf5cb2a | 305 | _comm.frequency(EALCD_LCD_FREQ); |
| richardparker | 0:839ecbf5cb2a | 306 | } |
| richardparker | 0:839ecbf5cb2a | 307 | |
| richardparker | 0:839ecbf5cb2a | 308 | void EALCD::_drawPoint(short x, short y, unsigned short c) |
| richardparker | 0:839ecbf5cb2a | 309 | { |
| richardparker | 0:839ecbf5cb2a | 310 | // No need to draw if off screen. |
| richardparker | 0:839ecbf5cb2a | 311 | if ((x >= width()) |
| richardparker | 0:839ecbf5cb2a | 312 | || |
| richardparker | 0:839ecbf5cb2a | 313 | (y >= height()) |
| richardparker | 0:839ecbf5cb2a | 314 | || |
| richardparker | 0:839ecbf5cb2a | 315 | (x < 0) |
| richardparker | 0:839ecbf5cb2a | 316 | || |
| richardparker | 0:839ecbf5cb2a | 317 | (y < 0)) |
| richardparker | 0:839ecbf5cb2a | 318 | { |
| richardparker | 0:839ecbf5cb2a | 319 | return; |
| richardparker | 0:839ecbf5cb2a | 320 | } |
| richardparker | 0:839ecbf5cb2a | 321 | |
| richardparker | 0:839ecbf5cb2a | 322 | // Move to the position on the screen to place the pixel. |
| richardparker | 0:839ecbf5cb2a | 323 | _moveTo(x, y); |
| richardparker | 0:839ecbf5cb2a | 324 | |
| richardparker | 0:839ecbf5cb2a | 325 | // Draw the pixel with the current pen value. |
| richardparker | 0:839ecbf5cb2a | 326 | _writeToDisplay(c); |
| richardparker | 0:839ecbf5cb2a | 327 | } |
| richardparker | 0:839ecbf5cb2a | 328 | |
| richardparker | 0:839ecbf5cb2a | 329 | void EALCD::_swap(short& i, short& j) |
| richardparker | 0:839ecbf5cb2a | 330 | { |
| richardparker | 0:839ecbf5cb2a | 331 | short temp = i; |
| richardparker | 0:839ecbf5cb2a | 332 | i = j; |
| richardparker | 0:839ecbf5cb2a | 333 | j = temp; |
| richardparker | 0:839ecbf5cb2a | 334 | } |
| richardparker | 0:839ecbf5cb2a | 335 | |
| richardparker | 0:839ecbf5cb2a | 336 | void EALCD::_draw4EllipsePoints(short cX, short cY, short x, short y, bool filled) |
| richardparker | 0:839ecbf5cb2a | 337 | { |
| richardparker | 0:839ecbf5cb2a | 338 | if (filled == true) |
| richardparker | 0:839ecbf5cb2a | 339 | { |
| richardparker | 0:839ecbf5cb2a | 340 | // line in quadrant 2 to 1. |
| richardparker | 0:839ecbf5cb2a | 341 | _drawLine(cX-x, cY+y, cX+x, cY+y, _brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 342 | // Point in quadrant 3 to 4. |
| richardparker | 0:839ecbf5cb2a | 343 | _drawLine(cX-x, cY-y, cX+x, cY-y, _brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 344 | } else { |
| richardparker | 0:839ecbf5cb2a | 345 | // Point in quadrant 1. |
| richardparker | 0:839ecbf5cb2a | 346 | _drawPoint(cX+x, cY+y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 347 | // Point in quadrant 2. |
| richardparker | 0:839ecbf5cb2a | 348 | _drawPoint(cX-x, cY+y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 349 | // Point in quadrant 3. |
| richardparker | 0:839ecbf5cb2a | 350 | _drawPoint(cX-x, cY-y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 351 | // Point in quadrant 4. |
| richardparker | 0:839ecbf5cb2a | 352 | _drawPoint(cX+x, cY-y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 353 | } |
| richardparker | 0:839ecbf5cb2a | 354 | } |
| richardparker | 0:839ecbf5cb2a | 355 | |
| richardparker | 0:839ecbf5cb2a | 356 | void EALCD::_drawEllipse(short x, short y, unsigned short w, unsigned short h, bool filled) |
| richardparker | 0:839ecbf5cb2a | 357 | { |
| richardparker | 0:839ecbf5cb2a | 358 | // Algorithm taken from http://homepage.smc.edu/kennedy_john/belipse.pdf |
| richardparker | 0:839ecbf5cb2a | 359 | short xRadius = w/2; |
| richardparker | 0:839ecbf5cb2a | 360 | short yRadius = h/2; |
| richardparker | 0:839ecbf5cb2a | 361 | short cX = x + xRadius; |
| richardparker | 0:839ecbf5cb2a | 362 | short cY = y + yRadius; |
| richardparker | 0:839ecbf5cb2a | 363 | |
| richardparker | 0:839ecbf5cb2a | 364 | int xChange = yRadius*yRadius*(1 - 2*xRadius); |
| richardparker | 0:839ecbf5cb2a | 365 | int yChange = xRadius*xRadius; |
| richardparker | 0:839ecbf5cb2a | 366 | int ellipseError = 0; |
| richardparker | 0:839ecbf5cb2a | 367 | int twoASquare = 2*xRadius*xRadius; |
| richardparker | 0:839ecbf5cb2a | 368 | int twoBSquare = 2*yRadius*yRadius; |
| richardparker | 0:839ecbf5cb2a | 369 | int stoppingX = twoBSquare*xRadius; |
| richardparker | 0:839ecbf5cb2a | 370 | int stoppingY = 0; |
| richardparker | 0:839ecbf5cb2a | 371 | |
| richardparker | 0:839ecbf5cb2a | 372 | x = xRadius; |
| richardparker | 0:839ecbf5cb2a | 373 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 374 | |
| richardparker | 0:839ecbf5cb2a | 375 | while (stoppingX >= stoppingY) |
| richardparker | 0:839ecbf5cb2a | 376 | { |
| richardparker | 0:839ecbf5cb2a | 377 | // 1st set of points, y' > -1. |
| richardparker | 0:839ecbf5cb2a | 378 | _draw4EllipsePoints(cX, cY, x, y, filled); |
| richardparker | 0:839ecbf5cb2a | 379 | y += 1; |
| richardparker | 0:839ecbf5cb2a | 380 | stoppingY += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 381 | ellipseError += yChange; |
| richardparker | 0:839ecbf5cb2a | 382 | yChange += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 383 | if ((2*ellipseError + yChange) > 0) |
| richardparker | 0:839ecbf5cb2a | 384 | { |
| richardparker | 0:839ecbf5cb2a | 385 | x -= 1; |
| richardparker | 0:839ecbf5cb2a | 386 | stoppingX -= twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 387 | ellipseError += xChange; |
| richardparker | 0:839ecbf5cb2a | 388 | xChange += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 389 | } |
| richardparker | 0:839ecbf5cb2a | 390 | } |
| richardparker | 0:839ecbf5cb2a | 391 | |
| richardparker | 0:839ecbf5cb2a | 392 | // 1st point set is done; start the 2nd set of points. |
| richardparker | 0:839ecbf5cb2a | 393 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 394 | y = yRadius-1; |
| richardparker | 0:839ecbf5cb2a | 395 | xChange = yRadius*yRadius; |
| richardparker | 0:839ecbf5cb2a | 396 | yChange = xRadius*xRadius*(1 - 2*yRadius); |
| richardparker | 0:839ecbf5cb2a | 397 | ellipseError = 0; |
| richardparker | 0:839ecbf5cb2a | 398 | stoppingX = 0; |
| richardparker | 0:839ecbf5cb2a | 399 | stoppingY = twoASquare*yRadius; |
| richardparker | 0:839ecbf5cb2a | 400 | |
| richardparker | 0:839ecbf5cb2a | 401 | while (stoppingX <= stoppingY) |
| richardparker | 0:839ecbf5cb2a | 402 | { |
| richardparker | 0:839ecbf5cb2a | 403 | // 2nd set of points, y' < -1. |
| richardparker | 0:839ecbf5cb2a | 404 | _draw4EllipsePoints(cX, cY, x, y, filled); |
| richardparker | 0:839ecbf5cb2a | 405 | x += 1; |
| richardparker | 0:839ecbf5cb2a | 406 | stoppingX += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 407 | ellipseError += xChange; |
| richardparker | 0:839ecbf5cb2a | 408 | xChange += twoBSquare; |
| richardparker | 0:839ecbf5cb2a | 409 | |
| richardparker | 0:839ecbf5cb2a | 410 | if ((2*ellipseError + yChange) > 0) |
| richardparker | 0:839ecbf5cb2a | 411 | { |
| richardparker | 0:839ecbf5cb2a | 412 | y -= 1; |
| richardparker | 0:839ecbf5cb2a | 413 | stoppingY -= twoASquare; |
| richardparker | 0:839ecbf5cb2a | 414 | ellipseError += yChange; |
| richardparker | 0:839ecbf5cb2a | 415 | yChange += twoASquare; |
| richardparker | 0:839ecbf5cb2a | 416 | } |
| richardparker | 0:839ecbf5cb2a | 417 | } |
| richardparker | 0:839ecbf5cb2a | 418 | } |
| richardparker | 0:839ecbf5cb2a | 419 | |
| richardparker | 0:839ecbf5cb2a | 420 | void EALCD::_drawLine(short x0, short y0, short x1, short y1, unsigned short c) |
| richardparker | 0:839ecbf5cb2a | 421 | { |
| richardparker | 0:839ecbf5cb2a | 422 | // Check if can be done faster. |
| richardparker | 0:839ecbf5cb2a | 423 | if (y0 == y1) |
| richardparker | 0:839ecbf5cb2a | 424 | { |
| richardparker | 0:839ecbf5cb2a | 425 | // Not on screen so don't draw. |
| richardparker | 0:839ecbf5cb2a | 426 | if ((y0 >= height()) || (y0 < 0)) |
| richardparker | 0:839ecbf5cb2a | 427 | { |
| richardparker | 0:839ecbf5cb2a | 428 | return; |
| richardparker | 0:839ecbf5cb2a | 429 | } |
| richardparker | 0:839ecbf5cb2a | 430 | |
| richardparker | 0:839ecbf5cb2a | 431 | // Horizontal line. |
| richardparker | 0:839ecbf5cb2a | 432 | unsigned short sx = (x0 < x1) ? x0 : x1; |
| richardparker | 0:839ecbf5cb2a | 433 | unsigned short length = abs(x1 - x0); |
| richardparker | 0:839ecbf5cb2a | 434 | |
| richardparker | 0:839ecbf5cb2a | 435 | // Make sure not going off edge of screen. |
| richardparker | 0:839ecbf5cb2a | 436 | if (sx+length > width()) |
| richardparker | 0:839ecbf5cb2a | 437 | { |
| richardparker | 0:839ecbf5cb2a | 438 | length = width()-sx; |
| richardparker | 0:839ecbf5cb2a | 439 | } |
| richardparker | 0:839ecbf5cb2a | 440 | |
| richardparker | 0:839ecbf5cb2a | 441 | // Move to start of line and just draw. |
| richardparker | 0:839ecbf5cb2a | 442 | _moveTo(sx, y0); |
| richardparker | 0:839ecbf5cb2a | 443 | for (int i = 0; i < length; i++) |
| richardparker | 0:839ecbf5cb2a | 444 | { |
| richardparker | 0:839ecbf5cb2a | 445 | _writeToDisplay(c); |
| richardparker | 0:839ecbf5cb2a | 446 | } |
| richardparker | 0:839ecbf5cb2a | 447 | |
| richardparker | 0:839ecbf5cb2a | 448 | return; |
| richardparker | 0:839ecbf5cb2a | 449 | } |
| richardparker | 0:839ecbf5cb2a | 450 | |
| richardparker | 0:839ecbf5cb2a | 451 | // This code is from http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm - the fast section i.e. |
| richardparker | 0:839ecbf5cb2a | 452 | // relies on only integer maths. |
| richardparker | 0:839ecbf5cb2a | 453 | |
| richardparker | 0:839ecbf5cb2a | 454 | bool steep = (abs(y1 - y0) > abs(x1 - x0)); |
| richardparker | 0:839ecbf5cb2a | 455 | |
| richardparker | 0:839ecbf5cb2a | 456 | if (steep == true) |
| richardparker | 0:839ecbf5cb2a | 457 | { |
| richardparker | 0:839ecbf5cb2a | 458 | _swap(x0, y0); |
| richardparker | 0:839ecbf5cb2a | 459 | _swap(x1, y1); |
| richardparker | 0:839ecbf5cb2a | 460 | } |
| richardparker | 0:839ecbf5cb2a | 461 | |
| richardparker | 0:839ecbf5cb2a | 462 | if (x0 > x1) |
| richardparker | 0:839ecbf5cb2a | 463 | { |
| richardparker | 0:839ecbf5cb2a | 464 | _swap(x0, x1); |
| richardparker | 0:839ecbf5cb2a | 465 | _swap(y0, y1); |
| richardparker | 0:839ecbf5cb2a | 466 | } |
| richardparker | 0:839ecbf5cb2a | 467 | |
| richardparker | 0:839ecbf5cb2a | 468 | int deltaX = x1 - x0; |
| richardparker | 0:839ecbf5cb2a | 469 | int deltaY = abs(y1 - y0); |
| richardparker | 0:839ecbf5cb2a | 470 | int error = deltaX / 2; |
| richardparker | 0:839ecbf5cb2a | 471 | int yStep; |
| richardparker | 0:839ecbf5cb2a | 472 | int y = y0; |
| richardparker | 0:839ecbf5cb2a | 473 | int x = 0; |
| richardparker | 0:839ecbf5cb2a | 474 | |
| richardparker | 0:839ecbf5cb2a | 475 | if (y0 < y1) |
| richardparker | 0:839ecbf5cb2a | 476 | { |
| richardparker | 0:839ecbf5cb2a | 477 | yStep = 1; |
| richardparker | 0:839ecbf5cb2a | 478 | } else { |
| richardparker | 0:839ecbf5cb2a | 479 | yStep = -1; |
| richardparker | 0:839ecbf5cb2a | 480 | } |
| richardparker | 0:839ecbf5cb2a | 481 | |
| richardparker | 0:839ecbf5cb2a | 482 | // Now actually loop and draw the line. |
| richardparker | 0:839ecbf5cb2a | 483 | for (x = x0; x < x1; x++) |
| richardparker | 0:839ecbf5cb2a | 484 | { |
| richardparker | 0:839ecbf5cb2a | 485 | // Channge drawing if drawing horizontal or vertical. |
| richardparker | 0:839ecbf5cb2a | 486 | if (steep == true) |
| richardparker | 0:839ecbf5cb2a | 487 | { |
| richardparker | 0:839ecbf5cb2a | 488 | _drawPoint(y, x, c); |
| richardparker | 0:839ecbf5cb2a | 489 | } else { |
| richardparker | 0:839ecbf5cb2a | 490 | _drawPoint(x, y, c); |
| richardparker | 0:839ecbf5cb2a | 491 | } |
| richardparker | 0:839ecbf5cb2a | 492 | |
| richardparker | 0:839ecbf5cb2a | 493 | // Calculate the error to decide to step or not. |
| richardparker | 0:839ecbf5cb2a | 494 | error = error - deltaY; |
| richardparker | 0:839ecbf5cb2a | 495 | |
| richardparker | 0:839ecbf5cb2a | 496 | if (error < 0) |
| richardparker | 0:839ecbf5cb2a | 497 | { |
| richardparker | 0:839ecbf5cb2a | 498 | y = y + yStep; |
| richardparker | 0:839ecbf5cb2a | 499 | error = error + deltaX; |
| richardparker | 0:839ecbf5cb2a | 500 | } |
| richardparker | 0:839ecbf5cb2a | 501 | } |
| richardparker | 0:839ecbf5cb2a | 502 | } |
| richardparker | 0:839ecbf5cb2a | 503 | |
| richardparker | 0:839ecbf5cb2a | 504 | void EALCD::clearScreen() |
| richardparker | 0:839ecbf5cb2a | 505 | { |
| richardparker | 0:839ecbf5cb2a | 506 | // First move to the top left. |
| richardparker | 0:839ecbf5cb2a | 507 | _window(0, 0, width(), height()); |
| richardparker | 0:839ecbf5cb2a | 508 | _moveTo(0, 0); |
| richardparker | 0:839ecbf5cb2a | 509 | |
| richardparker | 0:839ecbf5cb2a | 510 | // Now fill in relying on the addresses to be automatically updated. |
| richardparker | 0:839ecbf5cb2a | 511 | for(int i = 0; i < (width()*height()); i++) |
| richardparker | 0:839ecbf5cb2a | 512 | { |
| richardparker | 0:839ecbf5cb2a | 513 | _writeToDisplay(_brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 514 | } |
| richardparker | 0:839ecbf5cb2a | 515 | } |
| richardparker | 0:839ecbf5cb2a | 516 | |
| richardparker | 0:839ecbf5cb2a | 517 | void EALCD::drawPoint(short x, short y) |
| richardparker | 0:839ecbf5cb2a | 518 | { |
| richardparker | 0:839ecbf5cb2a | 519 | // Draw the pixel with the current pen value. |
| richardparker | 0:839ecbf5cb2a | 520 | _drawPoint(x, y, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 521 | } |
| richardparker | 0:839ecbf5cb2a | 522 | |
| richardparker | 0:839ecbf5cb2a | 523 | void EALCD::drawLine(short x0, short y0, short x1, short y1) |
| richardparker | 0:839ecbf5cb2a | 524 | { |
| richardparker | 0:839ecbf5cb2a | 525 | _drawLine(x0, y0, x1, y1, _pen.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 526 | } |
| richardparker | 0:839ecbf5cb2a | 527 | |
| richardparker | 0:839ecbf5cb2a | 528 | void EALCD::drawRect(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 529 | { |
| richardparker | 0:839ecbf5cb2a | 530 | // Draw the top horizontal line. |
| richardparker | 0:839ecbf5cb2a | 531 | drawLine(x, y, x + w - 1, y); |
| richardparker | 0:839ecbf5cb2a | 532 | |
| richardparker | 0:839ecbf5cb2a | 533 | // Draw the bottom horizontal line. |
| richardparker | 0:839ecbf5cb2a | 534 | drawLine(x, y + h - 1, x + w - 1, y + h - 1); |
| richardparker | 0:839ecbf5cb2a | 535 | |
| richardparker | 0:839ecbf5cb2a | 536 | // Draw the left vertical line. |
| richardparker | 0:839ecbf5cb2a | 537 | drawLine(x, y, x, y + h - 1); |
| richardparker | 0:839ecbf5cb2a | 538 | |
| richardparker | 0:839ecbf5cb2a | 539 | // Draw the right vertical line. |
| richardparker | 0:839ecbf5cb2a | 540 | drawLine(x + w - 1, y, x + w - 1, y + h); |
| richardparker | 0:839ecbf5cb2a | 541 | } |
| richardparker | 0:839ecbf5cb2a | 542 | |
| richardparker | 0:839ecbf5cb2a | 543 | void EALCD::drawFilledRect(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 544 | { |
| richardparker | 0:839ecbf5cb2a | 545 | if (x < 0) |
| richardparker | 0:839ecbf5cb2a | 546 | { |
| richardparker | 0:839ecbf5cb2a | 547 | x = 0; |
| richardparker | 0:839ecbf5cb2a | 548 | } |
| richardparker | 0:839ecbf5cb2a | 549 | |
| richardparker | 0:839ecbf5cb2a | 550 | if (y < 0) |
| richardparker | 0:839ecbf5cb2a | 551 | { |
| richardparker | 0:839ecbf5cb2a | 552 | y = 0; |
| richardparker | 0:839ecbf5cb2a | 553 | } |
| richardparker | 0:839ecbf5cb2a | 554 | |
| richardparker | 0:839ecbf5cb2a | 555 | // Set the window so that automatically wrap and go inside the box. |
| richardparker | 0:839ecbf5cb2a | 556 | _window(x, y, w, h); |
| richardparker | 0:839ecbf5cb2a | 557 | _moveTo(x, y); |
| richardparker | 0:839ecbf5cb2a | 558 | |
| richardparker | 0:839ecbf5cb2a | 559 | for (int i = 0; i < (w*h); i++) |
| richardparker | 0:839ecbf5cb2a | 560 | { |
| richardparker | 0:839ecbf5cb2a | 561 | _writeToDisplay(_brush.color().rawValue()); |
| richardparker | 0:839ecbf5cb2a | 562 | } |
| richardparker | 0:839ecbf5cb2a | 563 | |
| richardparker | 0:839ecbf5cb2a | 564 | drawRect(x, y, w, h); |
| richardparker | 0:839ecbf5cb2a | 565 | } |
| richardparker | 0:839ecbf5cb2a | 566 | |
| richardparker | 0:839ecbf5cb2a | 567 | |
| richardparker | 0:839ecbf5cb2a | 568 | void EALCD::drawEllipse(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 569 | { |
| richardparker | 0:839ecbf5cb2a | 570 | _drawEllipse(x, y, w, h, false); |
| richardparker | 0:839ecbf5cb2a | 571 | } |
| richardparker | 0:839ecbf5cb2a | 572 | |
| richardparker | 0:839ecbf5cb2a | 573 | void EALCD::drawFilledEllipse(short x, short y, unsigned short w, unsigned short h) |
| richardparker | 0:839ecbf5cb2a | 574 | { |
| richardparker | 0:839ecbf5cb2a | 575 | _drawEllipse(x, y, w, h, true); |
| richardparker | 0:839ecbf5cb2a | 576 | _drawEllipse(x, y, w, h, false); |
| richardparker | 0:839ecbf5cb2a | 577 | } |
| richardparker | 0:839ecbf5cb2a | 578 | |
| richardparker | 0:839ecbf5cb2a | 579 | void EALCD::drawImage(unsigned short x, unsigned short y, EAImage& img) |
| richardparker | 0:839ecbf5cb2a | 580 | { |
| richardparker | 0:839ecbf5cb2a | 581 | // Don't try painting an invalid image. |
| richardparker | 0:839ecbf5cb2a | 582 | if (img.isValid() == false) |
| richardparker | 0:839ecbf5cb2a | 583 | { |
| richardparker | 0:839ecbf5cb2a | 584 | return; |
| richardparker | 0:839ecbf5cb2a | 585 | } |
| richardparker | 0:839ecbf5cb2a | 586 | |
| richardparker | 0:839ecbf5cb2a | 587 | // Set the position to draw. |
| richardparker | 0:839ecbf5cb2a | 588 | img.setX(x); |
| richardparker | 0:839ecbf5cb2a | 589 | img.setY(y); |
| richardparker | 0:839ecbf5cb2a | 590 | |
| richardparker | 0:839ecbf5cb2a | 591 | // Draw the image. |
| richardparker | 0:839ecbf5cb2a | 592 | img.paint(*this); |
| richardparker | 0:839ecbf5cb2a | 593 | } |
| richardparker | 0:839ecbf5cb2a | 594 | |
| richardparker | 0:839ecbf5cb2a | 595 | void EALCD::drawText(unsigned short x, unsigned short y, char* text) |
| richardparker | 0:839ecbf5cb2a | 596 | { |
| richardparker | 0:839ecbf5cb2a | 597 | // Don't try painting with an invalid font or no text |
| richardparker | 0:839ecbf5cb2a | 598 | if ((_font.isValid() == false) || (text == NULL)) |
| richardparker | 0:839ecbf5cb2a | 599 | { |
| richardparker | 0:839ecbf5cb2a | 600 | return; |
| richardparker | 0:839ecbf5cb2a | 601 | } |
| richardparker | 0:839ecbf5cb2a | 602 | |
| richardparker | 0:839ecbf5cb2a | 603 | EAImage img; |
| richardparker | 0:839ecbf5cb2a | 604 | EAFont::EACharacter detail; |
| richardparker | 0:839ecbf5cb2a | 605 | |
| richardparker | 0:839ecbf5cb2a | 606 | img.load(_font.path()); |
| richardparker | 1:f04bcaea1d60 | 607 | // Treat the font image as a mask to allow pen colour to be used for the text. |
| richardparker | 1:f04bcaea1d60 | 608 | img.setMask(true); |
| richardparker | 0:839ecbf5cb2a | 609 | |
| richardparker | 0:839ecbf5cb2a | 610 | for (int i = 0; i < strlen(text); i++) |
| richardparker | 0:839ecbf5cb2a | 611 | { |
| richardparker | 0:839ecbf5cb2a | 612 | if (_font.getCharacter(text[i], detail) == true) |
| richardparker | 0:839ecbf5cb2a | 613 | { |
| richardparker | 0:839ecbf5cb2a | 614 | img.setX(x+detail.xOffset); |
| richardparker | 0:839ecbf5cb2a | 615 | img.setY(y+detail.yOffset); |
| richardparker | 0:839ecbf5cb2a | 616 | img.paint(*this, detail.x, detail.y, detail.width, detail.height); |
| richardparker | 0:839ecbf5cb2a | 617 | |
| richardparker | 0:839ecbf5cb2a | 618 | x += detail.xAdvance; |
| richardparker | 0:839ecbf5cb2a | 619 | } else { |
| richardparker | 0:839ecbf5cb2a | 620 | // Character is unrecognised. |
| richardparker | 0:839ecbf5cb2a | 621 | } |
| richardparker | 0:839ecbf5cb2a | 622 | } |
| richardparker | 0:839ecbf5cb2a | 623 | } |
| richardparker | 1:f04bcaea1d60 | 624 | |
| richardparker | 1:f04bcaea1d60 | 625 | void EALCD::noop() |
| richardparker | 1:f04bcaea1d60 | 626 | { |
| richardparker | 1:f04bcaea1d60 | 627 | // Turn off the mask so that nothing written. |
| richardparker | 1:f04bcaea1d60 | 628 | _writeToRegister(0x23, 0xfcfc); |
| richardparker | 1:f04bcaea1d60 | 629 | _writeToRegister(0x24, 0x00fc); |
| richardparker | 1:f04bcaea1d60 | 630 | |
| richardparker | 1:f04bcaea1d60 | 631 | // Write blank to increment address. |
| richardparker | 1:f04bcaea1d60 | 632 | _writeToDisplay(0x0000); |
| richardparker | 1:f04bcaea1d60 | 633 | |
| richardparker | 1:f04bcaea1d60 | 634 | // Turn mask back on. |
| richardparker | 1:f04bcaea1d60 | 635 | _writeToRegister(0x23, 0x0000); |
| richardparker | 1:f04bcaea1d60 | 636 | _writeToRegister(0x24, 0x0000); |
| richardparker | 1:f04bcaea1d60 | 637 | } |