Rob Dobson / LEDMatrix

Forked LEDMatrix and added horizontal scrolling

Fork of LEDMatrix by Yihui Xiong

LEDMatrix.cpp@3:1e06e89bc0c9, 2016-01-14 (annotated)

Committer:
Bobty
Date:
Thu Jan 14 16:52:04 2016 +0000
Revision:
3:1e06e89bc0c9
Parent:
2:cd2da920cf98
Child:
4:40d4afefcd74
Added flashing effect

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 0:13728deac7a7 1 /**
yihui 0:13728deac7a7 2 * LED Matrix library for http://www.seeedstudio.com/depot/ultrathin-16x32-red-led-matrix-panel-p-1582.html
yihui 0:13728deac7a7 3 * The LED Matrix panel has 32x16 pixels. Several panel can be combined together as a large screen.
yihui 0:13728deac7a7 4 *
yihui 0:13728deac7a7 5 * Coordinate & Connection (mbed -> panel 0 -> panel 1 -> ...)
yihui 0:13728deac7a7 6 * (0, 0) (0, 0)
yihui 0:13728deac7a7 7 * +--------+--------+--------+ +--------+--------+
yihui 0:13728deac7a7 8 * | 5 | 3 | 1 | | 1 | 0 |
yihui 0:13728deac7a7 9 * | | | | | | |<----- mbed
yihui 0:13728deac7a7 10 * +--------+--------+--------+ +--------+--------+
yihui 0:13728deac7a7 11 * | 4 | 2 | 0 | (64, 16)
yihui 0:13728deac7a7 12 * | | | |<----- mbed
yihui 0:13728deac7a7 13 * +--------+--------+--------+
yihui 0:13728deac7a7 14 * (96, 32)
yihui 0:13728deac7a7 15 * Copyright (c) 2013 Seeed Technology Inc.
yihui 0:13728deac7a7 16 * @auther Yihui Xiong
yihui 0:13728deac7a7 17 * @date Nov 8, 2013
yihui 0:13728deac7a7 18 * @license Apache
Bobty 2:cd2da920cf98 19 *
Bobty 2:cd2da920cf98 20 * Heavily modified by Rob Dobson, 2016
yihui 0:13728deac7a7 21 */
yihui 0:13728deac7a7 22
yihui 0:13728deac7a7 23 #include "LEDMatrix.h"
yihui 0:13728deac7a7 24 #include "mbed.h"
Bobty 2:cd2da920cf98 25 #include "fontBig.h"
Bobty 2:cd2da920cf98 26 #include "font5x7.h"
yihui 0:13728deac7a7 27
yihui 0:13728deac7a7 28 #if 0
yihui 0:13728deac7a7 29 #define ASSERT(e) if (!(e)) { Serial.println(#e); while (1); }
yihui 0:13728deac7a7 30 #else
yihui 0:13728deac7a7 31 #define ASSERT(e)
yihui 0:13728deac7a7 32 #endif
yihui 0:13728deac7a7 33
yihui 0:13728deac7a7 34 LEDMatrix::LEDMatrix(PinName pinA, PinName pinB, PinName pinC, PinName pinD, PinName pinOE, PinName pinR1, PinName pinSTB, PinName pinCLK) :
yihui 0:13728deac7a7 35 a(pinA), b(pinB), c(pinC), d(pinD), oe(pinOE), r1(pinR1), stb(pinSTB), clk(pinCLK)
yihui 0:13728deac7a7 36 {
yihui 0:13728deac7a7 37 this->clk = clk;
yihui 0:13728deac7a7 38 this->r1 = r1;
yihui 0:13728deac7a7 39 this->stb = stb;
yihui 0:13728deac7a7 40 this->oe = oe;
yihui 0:13728deac7a7 41 this->a = a;
yihui 0:13728deac7a7 42 this->b = b;
yihui 0:13728deac7a7 43 this->c = c;
yihui 0:13728deac7a7 44 this->d = d;
yihui 0:13728deac7a7 45
yihui 0:13728deac7a7 46 mask = 0xff;
Bobty 2:cd2da920cf98 47 _isEnabled = false;
Bobty 2:cd2da920cf98 48 for (int i = 0; i < LED_MATRIX_LEDS_VERTICALLY; i++)
Bobty 2:cd2da920cf98 49 {
Bobty 2:cd2da920cf98 50 _hScrollPos[i] = 0;
Bobty 2:cd2da920cf98 51 _hScrollWidth[i] = LED_MATRIX_LEDS_HORIZONTALLY;
Bobty 2:cd2da920cf98 52 }
Bobty 2:cd2da920cf98 53 for (int i = 0; i < LED_MATRIX_MAX_LINES; i++)
Bobty 2:cd2da920cf98 54 {
Bobty 2:cd2da920cf98 55 _lineScrollInc[i] = 0;
Bobty 3:1e06e89bc0c9 56 _lineAlert[i] = false;
Bobty 3:1e06e89bc0c9 57 _lineInvert[i] = false;
Bobty 2:cd2da920cf98 58 }
Bobty 2:cd2da920cf98 59 _isBusy = false;
Bobty 2:cd2da920cf98 60 _charSeparation = 1;
Bobty 3:1e06e89bc0c9 61 _flashCounter = 0;
Bobty 3:1e06e89bc0c9 62 _flashRate = 8;
Bobty 3:1e06e89bc0c9 63 _flashState = false;
yihui 0:13728deac7a7 64 }
yihui 0:13728deac7a7 65
Bobty 3:1e06e89bc0c9 66 void LEDMatrix::begin(uint8_t *_pDisplayBuf, uint16_t width, uint16_t height, uint16_t dispBufWidth,
Bobty 3:1e06e89bc0c9 67 uint16_t numLines, int charSeparation, int flashRate)
yihui 0:13728deac7a7 68 {
Bobty 2:cd2da920cf98 69 ASSERT(0 == (width % LED_MATRIX_LEDS_HORIZONTALLY));
Bobty 2:cd2da920cf98 70 ASSERT(0 == (scroll_width % LED_MATRIX_LEDS_HORIZONTALLY));
Bobty 2:cd2da920cf98 71 ASSERT(0 == (height % LED_MATRIX_LEDS_VERTICALLY));
yihui 0:13728deac7a7 72
Bobty 2:cd2da920cf98 73 this->_pDisplayBuf = _pDisplayBuf;
yihui 0:13728deac7a7 74 this->width = width;
yihui 0:13728deac7a7 75 this->height = height;
Bobty 2:cd2da920cf98 76 this->dispBufWidth = dispBufWidth;
Bobty 2:cd2da920cf98 77 this->numLines = numLines;
Bobty 2:cd2da920cf98 78 this->_charSeparation = charSeparation;
Bobty 3:1e06e89bc0c9 79 this->_flashRate = flashRate;
Bobty 2:cd2da920cf98 80 if (numLines > LED_MATRIX_MAX_LINES)
Bobty 2:cd2da920cf98 81 this->numLines = LED_MATRIX_MAX_LINES;
Bobty 2:cd2da920cf98 82 for (int i = 0; i < LED_MATRIX_LEDS_VERTICALLY; i++)
Bobty 2:cd2da920cf98 83 {
Bobty 2:cd2da920cf98 84 this->_hScrollWidth[i] = dispBufWidth;
Bobty 2:cd2da920cf98 85 }
yihui 0:13728deac7a7 86
Bobty 2:cd2da920cf98 87 _isEnabled = true;
yihui 0:13728deac7a7 88 }
yihui 0:13728deac7a7 89
yihui 0:13728deac7a7 90 void LEDMatrix::drawPoint(uint16_t x, uint16_t y, uint8_t pixel)
yihui 0:13728deac7a7 91 {
Bobty 2:cd2da920cf98 92 ASSERT(dispBufWidth > x);
yihui 0:13728deac7a7 93 ASSERT(height > y);
yihui 0:13728deac7a7 94
Bobty 2:cd2da920cf98 95 uint8_t *byte = _pDisplayBuf + (height - 1 - y) * dispBufWidth / 8 + x / 8;
Bobty 2:cd2da920cf98 96 uint8_t bit = x % 8;
yihui 0:13728deac7a7 97
Bobty 2:cd2da920cf98 98 if (pixel)
Bobty 2:cd2da920cf98 99 {
yihui 0:13728deac7a7 100 *byte |= 0x80 >> bit;
Bobty 2:cd2da920cf98 101 }
Bobty 2:cd2da920cf98 102 else
Bobty 2:cd2da920cf98 103 {
yihui 0:13728deac7a7 104 *byte &= ~(0x80 >> bit);
yihui 0:13728deac7a7 105 }
yihui 0:13728deac7a7 106 }
yihui 0:13728deac7a7 107
yihui 0:13728deac7a7 108 void LEDMatrix::drawRect(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t pixel)
yihui 0:13728deac7a7 109 {
Bobty 2:cd2da920cf98 110 for (uint16_t x = x1; x < x2; x++)
Bobty 2:cd2da920cf98 111 {
Bobty 2:cd2da920cf98 112 for (uint16_t y = y1; y < y2; y++)
Bobty 2:cd2da920cf98 113 {
yihui 0:13728deac7a7 114 drawPoint(x, y, pixel);
yihui 0:13728deac7a7 115 }
yihui 0:13728deac7a7 116 }
yihui 0:13728deac7a7 117 }
yihui 0:13728deac7a7 118
yihui 0:13728deac7a7 119 void LEDMatrix::drawImage(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t *image)
yihui 0:13728deac7a7 120 {
yihui 0:13728deac7a7 121 ASSERT(0 == ((x2 - x1) % 8));
yihui 0:13728deac7a7 122
Bobty 2:cd2da920cf98 123 for (uint16_t x = x1; x < x2; x++)
Bobty 2:cd2da920cf98 124 {
Bobty 2:cd2da920cf98 125 for (uint16_t y = y1; y < y2; y++)
Bobty 2:cd2da920cf98 126 {
yihui 0:13728deac7a7 127 uint8_t *byte = image + x * 8 + y / 8;
yihui 0:13728deac7a7 128 uint8_t bit = 7 - (y % 8);
yihui 0:13728deac7a7 129 uint8_t pixel = (*byte >> bit) & 1;
yihui 0:13728deac7a7 130 drawPoint(x, y, pixel);
yihui 0:13728deac7a7 131 }
yihui 0:13728deac7a7 132 }
yihui 0:13728deac7a7 133 }
yihui 0:13728deac7a7 134
Bobty 2:cd2da920cf98 135 //void LEDMatrix::clear()
Bobty 2:cd2da920cf98 136 //{
Bobty 2:cd2da920cf98 137 // uint8_t *ptr = _pDisplayBuf;
Bobty 2:cd2da920cf98 138 // for (uint16_t i = 0; i < (dispBufWidth * height / 8); i++)
Bobty 2:cd2da920cf98 139 // {
Bobty 2:cd2da920cf98 140 // *ptr = 0x00;
Bobty 2:cd2da920cf98 141 // ptr++;
Bobty 2:cd2da920cf98 142 // }
Bobty 2:cd2da920cf98 143 //}
yihui 0:13728deac7a7 144
Bobty 2:cd2da920cf98 145 void LEDMatrix::invertColour()
yihui 0:13728deac7a7 146 {
yihui 0:13728deac7a7 147 mask = ~mask;
yihui 0:13728deac7a7 148 }
yihui 0:13728deac7a7 149
Bobty 2:cd2da920cf98 150 uint8_t LEDMatrix::isInvertedColour()
yihui 0:13728deac7a7 151 {
yihui 0:13728deac7a7 152 return mask;
yihui 0:13728deac7a7 153 }
yihui 0:13728deac7a7 154
yihui 0:13728deac7a7 155 void LEDMatrix::scan()
yihui 0:13728deac7a7 156 {
Bobty 2:cd2da920cf98 157 // On each call this function handles one row of the display
Bobty 2:cd2da920cf98 158 static uint8_t scanRowIdx = 0;
yihui 0:13728deac7a7 159
Bobty 2:cd2da920cf98 160 // Check if being updated
Bobty 2:cd2da920cf98 161 if (_isBusy)
yihui 0:13728deac7a7 162 return;
Bobty 2:cd2da920cf98 163
Bobty 2:cd2da920cf98 164 // Check if display enabled
Bobty 2:cd2da920cf98 165 if (!_isEnabled)
Bobty 2:cd2da920cf98 166 return;
yihui 0:13728deac7a7 167
Bobty 2:cd2da920cf98 168 // Base of this scan row in buffer to display
Bobty 2:cd2da920cf98 169 uint8_t *pBufBase = _pDisplayBuf + scanRowIdx * (dispBufWidth / 8);
Bobty 2:cd2da920cf98 170
Bobty 2:cd2da920cf98 171 // Handle multiple units vertically
Bobty 2:cd2da920cf98 172 for (int rowIdx = 0; rowIdx < (height / LED_MATRIX_LEDS_VERTICALLY); rowIdx++)
Bobty 1:79cf2e115449 173 {
Bobty 2:cd2da920cf98 174 // Calculate buffer position within this unit
Bobty 2:cd2da920cf98 175 uint8_t *pBuf = pBufBase + rowIdx * (dispBufWidth / 8) * LED_MATRIX_LEDS_VERTICALLY;
yihui 0:13728deac7a7 176
Bobty 3:1e06e89bc0c9 177 // Work out which display line we're in
Bobty 3:1e06e89bc0c9 178 uint8_t dispMask = mask;
Bobty 3:1e06e89bc0c9 179 bool invertRow = false;
Bobty 3:1e06e89bc0c9 180 int rowsInLine = (height/numLines);
Bobty 3:1e06e89bc0c9 181 int dispLine = scanRowIdx / rowsInLine;
Bobty 3:1e06e89bc0c9 182 if (dispLine < numLines)
Bobty 3:1e06e89bc0c9 183 {
Bobty 3:1e06e89bc0c9 184 if (_lineInvert[dispLine])
Bobty 3:1e06e89bc0c9 185 dispMask = ~dispMask;
Bobty 3:1e06e89bc0c9 186 }
Bobty 3:1e06e89bc0c9 187
Bobty 2:cd2da920cf98 188 // Work along the display row sending out data as we go
Bobty 2:cd2da920cf98 189 // Noting that the first data we send out will be shunted to the end of the row
Bobty 2:cd2da920cf98 190 int hScrollPos = _hScrollPos[scanRowIdx];
Bobty 2:cd2da920cf98 191 int hScrollWidth = _hScrollWidth[scanRowIdx];
Bobty 2:cd2da920cf98 192 if (hScrollWidth > dispBufWidth)
Bobty 2:cd2da920cf98 193 hScrollWidth = dispBufWidth;
Bobty 2:cd2da920cf98 194 int bitOffset = hScrollPos % 8;
Bobty 2:cd2da920cf98 195 for (int byteIdx = (width / 8) - 1; byteIdx >= 0; byteIdx--)
Bobty 1:79cf2e115449 196 {
Bobty 2:cd2da920cf98 197 // When a row is scrolled a single byte on the display can be a combination of two buffer bytes
Bobty 2:cd2da920cf98 198 uint8_t* pByte1 = pBuf + ((byteIdx*8 + hScrollPos) % hScrollWidth) / 8;
Bobty 2:cd2da920cf98 199 uint8_t* pByte2 = pBuf + (((byteIdx+1)*8 + hScrollPos) % hScrollWidth) / 8;
Bobty 2:cd2da920cf98 200 uint8_t pixels = ((*pByte1) << bitOffset) + (((*pByte2) >> (8 - bitOffset)) % 256);
Bobty 2:cd2da920cf98 201
Bobty 2:cd2da920cf98 202 // Reverse the bits so they come out in the right order
Bobty 3:1e06e89bc0c9 203 pixels = reverseBits(pixels) ^ dispMask; // reverse: mask = 0xff, normal: mask =0x00
Bobty 1:79cf2e115449 204 for (uint8_t bit = 0; bit < 8; bit++)
Bobty 1:79cf2e115449 205 {
yihui 0:13728deac7a7 206 clk = 0;
yihui 0:13728deac7a7 207 r1 = pixels & (0x80 >> bit);
yihui 0:13728deac7a7 208 clk = 1;
yihui 0:13728deac7a7 209 }
yihui 0:13728deac7a7 210 }
yihui 0:13728deac7a7 211 }
yihui 0:13728deac7a7 212
Bobty 2:cd2da920cf98 213 // Disable display
Bobty 2:cd2da920cf98 214 oe = 1;
yihui 0:13728deac7a7 215
Bobty 2:cd2da920cf98 216 // Select row (rows are muxed)
Bobty 2:cd2da920cf98 217 int rowSel = LED_MATRIX_LEDS_VERTICALLY - 1 - scanRowIdx;
Bobty 2:cd2da920cf98 218 a = (rowSel & 0x01);
Bobty 2:cd2da920cf98 219 b = (rowSel & 0x02);
Bobty 2:cd2da920cf98 220 c = (rowSel & 0x04);
Bobty 2:cd2da920cf98 221 d = (rowSel & 0x08);
yihui 0:13728deac7a7 222
Bobty 2:cd2da920cf98 223 // Latch data
yihui 0:13728deac7a7 224 stb = 0;
yihui 0:13728deac7a7 225 stb = 1;
yihui 0:13728deac7a7 226
Bobty 2:cd2da920cf98 227 // Reenable display
Bobty 2:cd2da920cf98 228 oe = 0;
yihui 0:13728deac7a7 229
Bobty 2:cd2da920cf98 230 // Move the scan row on for next time
Bobty 2:cd2da920cf98 231 scanRowIdx = (scanRowIdx + 1) & 0x0F;
yihui 0:13728deac7a7 232 }
yihui 0:13728deac7a7 233
yihui 0:13728deac7a7 234 void LEDMatrix::on()
yihui 0:13728deac7a7 235 {
Bobty 2:cd2da920cf98 236 _isEnabled = true;
yihui 0:13728deac7a7 237 }
yihui 0:13728deac7a7 238
yihui 0:13728deac7a7 239 void LEDMatrix::off()
yihui 0:13728deac7a7 240 {
Bobty 2:cd2da920cf98 241 _isEnabled = false;
yihui 0:13728deac7a7 242 oe = 1;
yihui 0:13728deac7a7 243 }
yihui 0:13728deac7a7 244
Bobty 2:cd2da920cf98 245 bool LEDMatrix::getRowsToWorkOn(int lineIdx, int &startRow, int &numRows)
Bobty 2:cd2da920cf98 246 {
Bobty 2:cd2da920cf98 247 // lineIdx == -1 means all lines
Bobty 2:cd2da920cf98 248 startRow = 0;
Bobty 2:cd2da920cf98 249 numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 250 if (lineIdx != -1)
Bobty 2:cd2da920cf98 251 {
Bobty 2:cd2da920cf98 252 if ((lineIdx < 0) || (lineIdx >= numLines))
Bobty 2:cd2da920cf98 253 return false;
Bobty 2:cd2da920cf98 254 numRows = height / numLines;
Bobty 2:cd2da920cf98 255 startRow = lineIdx * numRows;
Bobty 2:cd2da920cf98 256 }
Bobty 2:cd2da920cf98 257 return true;
Bobty 2:cd2da920cf98 258 }
Bobty 2:cd2da920cf98 259
Bobty 2:cd2da920cf98 260 void LEDMatrix::scrollReset(int lineIdx)
Bobty 2:cd2da920cf98 261 {
Bobty 2:cd2da920cf98 262 // Interpret param
Bobty 2:cd2da920cf98 263 int startRow = 0;
Bobty 2:cd2da920cf98 264 int numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 265 if (!getRowsToWorkOn(lineIdx, startRow, numRows))
Bobty 2:cd2da920cf98 266 return;
Bobty 2:cd2da920cf98 267 // Reset scroll position all rows
Bobty 2:cd2da920cf98 268 for (int i = startRow; i < startRow+numRows; i++)
Bobty 2:cd2da920cf98 269 _hScrollPos[i] = 0;
Bobty 2:cd2da920cf98 270 }
Bobty 2:cd2da920cf98 271
Bobty 2:cd2da920cf98 272 void LEDMatrix::scroll(int lineIdx, bool scrollLeft)
Bobty 2:cd2da920cf98 273 {
Bobty 2:cd2da920cf98 274 // Interpret param
Bobty 2:cd2da920cf98 275 int startRow = 0;
Bobty 2:cd2da920cf98 276 int numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 277 if (!getRowsToWorkOn(lineIdx, startRow, numRows))
Bobty 2:cd2da920cf98 278 return;
Bobty 2:cd2da920cf98 279 // Reset scroll position all rows
Bobty 2:cd2da920cf98 280 for (int i = startRow; i < startRow+numRows; i++)
Bobty 2:cd2da920cf98 281 {
Bobty 2:cd2da920cf98 282 if (scrollLeft)
Bobty 2:cd2da920cf98 283 {
Bobty 2:cd2da920cf98 284 _hScrollPos[i]++;
Bobty 2:cd2da920cf98 285 if (_hScrollPos[i] >= _hScrollWidth[i])
Bobty 2:cd2da920cf98 286 _hScrollPos[i] = 0;
Bobty 2:cd2da920cf98 287 }
Bobty 2:cd2da920cf98 288 else
Bobty 2:cd2da920cf98 289 {
Bobty 2:cd2da920cf98 290 _hScrollPos[i]--;
Bobty 2:cd2da920cf98 291 if (_hScrollPos[i] < 0)
Bobty 2:cd2da920cf98 292 _hScrollPos[i] = _hScrollWidth[i]-1;
Bobty 2:cd2da920cf98 293 }
Bobty 2:cd2da920cf98 294 }
Bobty 2:cd2da920cf98 295 }
Bobty 2:cd2da920cf98 296
Bobty 2:cd2da920cf98 297 void LEDMatrix::scrollToPos(int lineIdx, int pos)
Bobty 1:79cf2e115449 298 {
Bobty 2:cd2da920cf98 299 // Interpret param
Bobty 2:cd2da920cf98 300 int startRow = 0;
Bobty 2:cd2da920cf98 301 int numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 302 if (!getRowsToWorkOn(lineIdx, startRow, numRows))
Bobty 2:cd2da920cf98 303 return;
Bobty 2:cd2da920cf98 304 // Check pos
Bobty 2:cd2da920cf98 305 if ((pos < 0) || (pos >= dispBufWidth))
Bobty 2:cd2da920cf98 306 return;
Bobty 2:cd2da920cf98 307 // Reset scroll position all rows
Bobty 2:cd2da920cf98 308 for (int i = startRow; i < startRow+numRows; i++)
Bobty 2:cd2da920cf98 309 _hScrollPos[i] = pos;
Bobty 2:cd2da920cf98 310 }
Bobty 2:cd2da920cf98 311
Bobty 2:cd2da920cf98 312 void LEDMatrix::clear(int lineIdx)
Bobty 2:cd2da920cf98 313 {
Bobty 2:cd2da920cf98 314 // Interpret param
Bobty 2:cd2da920cf98 315 int startRow = 0;
Bobty 2:cd2da920cf98 316 int numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 317 if (!getRowsToWorkOn(lineIdx, startRow, numRows))
Bobty 2:cd2da920cf98 318 return;
Bobty 2:cd2da920cf98 319 // Clear section
Bobty 2:cd2da920cf98 320 uint8_t *ptr = _pDisplayBuf + startRow * (dispBufWidth / 8);
Bobty 2:cd2da920cf98 321 int bytesToZero = numRows * (dispBufWidth / 8);
Bobty 2:cd2da920cf98 322 for (int i = 0; i < bytesToZero; i++)
Bobty 2:cd2da920cf98 323 *ptr++ = 0x00;
Bobty 2:cd2da920cf98 324 }
Bobty 2:cd2da920cf98 325
Bobty 2:cd2da920cf98 326 void LEDMatrix::setupScroll(int lineIdx, int scrollWidth, int scrollInc)
Bobty 2:cd2da920cf98 327 {
Bobty 2:cd2da920cf98 328 // Interpret param
Bobty 2:cd2da920cf98 329 int startRow = 0;
Bobty 2:cd2da920cf98 330 int numRows = LED_MATRIX_LEDS_VERTICALLY;
Bobty 2:cd2da920cf98 331 if (!getRowsToWorkOn(lineIdx, startRow, numRows))
Bobty 2:cd2da920cf98 332 return;
Bobty 2:cd2da920cf98 333 scrollWidth = (((scrollWidth / 8) + 1) * 8);
Bobty 2:cd2da920cf98 334 if (scrollWidth <= 0)
Bobty 2:cd2da920cf98 335 return;
Bobty 2:cd2da920cf98 336 for (int i = startRow; i < startRow+numRows; i++)
Bobty 2:cd2da920cf98 337 {
Bobty 2:cd2da920cf98 338 _hScrollPos[i] = 0;
Bobty 2:cd2da920cf98 339 _hScrollWidth[i] = scrollWidth;
Bobty 2:cd2da920cf98 340 }
Bobty 3:1e06e89bc0c9 341 // Store the scroll increment
Bobty 3:1e06e89bc0c9 342 int startLine = 0;
Bobty 3:1e06e89bc0c9 343 int linesToProcess = numLines;
Bobty 3:1e06e89bc0c9 344 if (lineIdx != -1)
Bobty 3:1e06e89bc0c9 345 {
Bobty 3:1e06e89bc0c9 346 if ((lineIdx < 0) || (lineIdx >= numLines))
Bobty 3:1e06e89bc0c9 347 return;
Bobty 3:1e06e89bc0c9 348 startLine = lineIdx;
Bobty 3:1e06e89bc0c9 349 linesToProcess = 1;
Bobty 3:1e06e89bc0c9 350 }
Bobty 3:1e06e89bc0c9 351 for (int i = 0; i < linesToProcess; i++)
Bobty 3:1e06e89bc0c9 352 _lineScrollInc[i+startLine] = scrollInc;
Bobty 2:cd2da920cf98 353 }
Bobty 2:cd2da920cf98 354
Bobty 3:1e06e89bc0c9 355 void LEDMatrix::setAlert(int lineIdx, bool alertOn)
Bobty 3:1e06e89bc0c9 356 {
Bobty 3:1e06e89bc0c9 357 // Store the alert status
Bobty 3:1e06e89bc0c9 358 int startLine = 0;
Bobty 3:1e06e89bc0c9 359 int linesToProcess = numLines;
Bobty 3:1e06e89bc0c9 360 if (lineIdx != -1)
Bobty 3:1e06e89bc0c9 361 {
Bobty 3:1e06e89bc0c9 362 if ((lineIdx < 0) || (lineIdx >= numLines))
Bobty 3:1e06e89bc0c9 363 return;
Bobty 3:1e06e89bc0c9 364 startLine = lineIdx;
Bobty 3:1e06e89bc0c9 365 linesToProcess = 1;
Bobty 3:1e06e89bc0c9 366 }
Bobty 3:1e06e89bc0c9 367 for (int i = 0; i < linesToProcess; i++)
Bobty 3:1e06e89bc0c9 368 _lineAlert[i+startLine] = alertOn;
Bobty 3:1e06e89bc0c9 369 }
Bobty 3:1e06e89bc0c9 370
Bobty 2:cd2da920cf98 371 void LEDMatrix::serviceEffects()
Bobty 2:cd2da920cf98 372 {
Bobty 3:1e06e89bc0c9 373 // Scroll / flash logic
Bobty 3:1e06e89bc0c9 374 int rowsInLine = (height / numLines);
Bobty 3:1e06e89bc0c9 375 for (int i = 0; i < numLines; i++)
Bobty 2:cd2da920cf98 376 {
Bobty 3:1e06e89bc0c9 377 for (int j = 0; j < rowsInLine; j++)
Bobty 3:1e06e89bc0c9 378 _hScrollPos[i*rowsInLine+j] += _lineScrollInc[i];
Bobty 3:1e06e89bc0c9 379 _lineInvert[i] = _lineAlert[i] ? _flashState : false;
Bobty 3:1e06e89bc0c9 380 }
Bobty 3:1e06e89bc0c9 381
Bobty 3:1e06e89bc0c9 382 // Update flash state
Bobty 3:1e06e89bc0c9 383 _flashCounter++;
Bobty 3:1e06e89bc0c9 384 if (_flashCounter >= _flashRate)
Bobty 3:1e06e89bc0c9 385 {
Bobty 3:1e06e89bc0c9 386 _flashCounter = 0;
Bobty 3:1e06e89bc0c9 387 _flashState = !_flashState;
Bobty 2:cd2da920cf98 388 }
Bobty 2:cd2da920cf98 389 }
Bobty 2:cd2da920cf98 390
Bobty 2:cd2da920cf98 391 // Reverse bits in byte
Bobty 2:cd2da920cf98 392 uint8_t LEDMatrix::reverseBits(uint8_t b)
Bobty 2:cd2da920cf98 393 {
Bobty 2:cd2da920cf98 394 b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
Bobty 2:cd2da920cf98 395 b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
Bobty 2:cd2da920cf98 396 b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
Bobty 2:cd2da920cf98 397 return b;
Bobty 1:79cf2e115449 398 }
Bobty 1:79cf2e115449 399
Bobty 2:cd2da920cf98 400 // Display ASCII char
Bobty 2:cd2da920cf98 401 int LEDMatrix::displayChar(int xPos, int yPos, char ch)
Bobty 1:79cf2e115449 402 {
Bobty 2:cd2da920cf98 403 const int FONT_HEIGHT = 7;
Bobty 2:cd2da920cf98 404 const int FONT_WIDTH = 5;
Bobty 2:cd2da920cf98 405
Bobty 2:cd2da920cf98 406 // Find the width of the character
Bobty 2:cd2da920cf98 407 uint8_t chTotalBits = 0;
Bobty 2:cd2da920cf98 408 int chIdxInFont = (ch % 128) - 0x20;
Bobty 2:cd2da920cf98 409 // Special case for £, euro and yen signs
Bobty 2:cd2da920cf98 410 if ((ch >= 0xa3) && (ch <= 0xa5))
Bobty 2:cd2da920cf98 411 chIdxInFont = ch - 0xa3 + 128 - ' ';
Bobty 2:cd2da920cf98 412 for (int i = 0; i < FONT_HEIGHT; i++)
Bobty 2:cd2da920cf98 413 {
Bobty 2:cd2da920cf98 414 uint8_t chBits = font5x7[chIdxInFont][i];
Bobty 2:cd2da920cf98 415 chTotalBits |= chBits;
Bobty 2:cd2da920cf98 416 }
Bobty 2:cd2da920cf98 417 uint8_t rightShift = 0;
Bobty 2:cd2da920cf98 418 for (int j = 0; j < FONT_WIDTH; j++)
Bobty 2:cd2da920cf98 419 {
Bobty 2:cd2da920cf98 420 if (chTotalBits & 0x01)
Bobty 2:cd2da920cf98 421 break;
Bobty 2:cd2da920cf98 422 chTotalBits = chTotalBits >> 1;
Bobty 2:cd2da920cf98 423 rightShift++;
Bobty 2:cd2da920cf98 424 }
Bobty 2:cd2da920cf98 425 uint8_t charWidth = 8;
Bobty 2:cd2da920cf98 426 for (int j = 0; j < FONT_WIDTH+1; j++)
Bobty 2:cd2da920cf98 427 {
Bobty 2:cd2da920cf98 428 if (chTotalBits & 0x80)
Bobty 2:cd2da920cf98 429 break;
Bobty 2:cd2da920cf98 430 chTotalBits = chTotalBits << 1;
Bobty 2:cd2da920cf98 431 charWidth--;
Bobty 2:cd2da920cf98 432 }
Bobty 2:cd2da920cf98 433
Bobty 2:cd2da920cf98 434 // display character
Bobty 2:cd2da920cf98 435 int xOffset = xPos / 8;
Bobty 2:cd2da920cf98 436 int bitOffset = xPos % 8;
Bobty 2:cd2da920cf98 437 // printf("%c %d %d %d %d\n", ch, charPos, charWidth, xOffset, bitOffset);
Bobty 2:cd2da920cf98 438 if (xOffset >= (dispBufWidth/8))
Bobty 2:cd2da920cf98 439 return 0;
Bobty 2:cd2da920cf98 440
Bobty 2:cd2da920cf98 441 // Copy the bits of the character into the buffer
Bobty 2:cd2da920cf98 442 for (int i = 0; i < FONT_HEIGHT; i++)
Bobty 2:cd2da920cf98 443 {
Bobty 2:cd2da920cf98 444 // Check we don't go off the display buffer
Bobty 2:cd2da920cf98 445 int rowIdx = i + yPos;
Bobty 2:cd2da920cf98 446 if (rowIdx > height)
Bobty 2:cd2da920cf98 447 break;
Bobty 2:cd2da920cf98 448
Bobty 2:cd2da920cf98 449 //
Bobty 2:cd2da920cf98 450 uint8_t chBits = font5x7[chIdxInFont][i] >> rightShift;
Bobty 2:cd2da920cf98 451 int dispBufPos = (rowIdx * (dispBufWidth/8) + xOffset);
Bobty 2:cd2da920cf98 452 _pDisplayBuf[dispBufPos] |= ((chBits << (8 - charWidth)) >> bitOffset);
Bobty 2:cd2da920cf98 453 if (xOffset + 1 < (dispBufWidth/8))
Bobty 2:cd2da920cf98 454 _pDisplayBuf[dispBufPos + 1] |= ((chBits << (8-bitOffset)) << (8 - charWidth));
Bobty 2:cd2da920cf98 455 }
Bobty 2:cd2da920cf98 456
Bobty 2:cd2da920cf98 457 return charWidth;
Bobty 1:79cf2e115449 458 }
Bobty 1:79cf2e115449 459
Bobty 2:cd2da920cf98 460 // Display a large digit
Bobty 2:cd2da920cf98 461 int LEDMatrix::displayLargeDigit(int curX, int curY, char ch)
Bobty 1:79cf2e115449 462 {
Bobty 2:cd2da920cf98 463 // Bounds check
Bobty 2:cd2da920cf98 464 if ((ch < '0') || (ch > '9'))
Bobty 2:cd2da920cf98 465 return 0;
Bobty 2:cd2da920cf98 466
Bobty 2:cd2da920cf98 467 // Get character data
Bobty 2:cd2da920cf98 468 const uint8_t* charData = bigFont[ch-'0'];
Bobty 2:cd2da920cf98 469 int numLines = sizeof(bigFont[0])/sizeof(bigFont[0][0]);
Bobty 2:cd2da920cf98 470
Bobty 2:cd2da920cf98 471 // Find the position and width of the character
Bobty 2:cd2da920cf98 472 uint16_t chTotalBits = 0;
Bobty 2:cd2da920cf98 473 for (int i = 0; i < numLines; i++)
Bobty 2:cd2da920cf98 474 chTotalBits |= charData[i];
Bobty 2:cd2da920cf98 475 uint16_t rightShift = 0;
Bobty 2:cd2da920cf98 476 for (; rightShift < 16; rightShift++)
Bobty 2:cd2da920cf98 477 {
Bobty 2:cd2da920cf98 478 if (chTotalBits & 0x01)
Bobty 2:cd2da920cf98 479 break;
Bobty 2:cd2da920cf98 480 chTotalBits = chTotalBits >> 1;
Bobty 2:cd2da920cf98 481 }
Bobty 2:cd2da920cf98 482 uint16_t charWidth = 16;
Bobty 2:cd2da920cf98 483 for (; charWidth > 0; charWidth--)
Bobty 2:cd2da920cf98 484 {
Bobty 2:cd2da920cf98 485 if (chTotalBits & 0x8000)
Bobty 2:cd2da920cf98 486 break;
Bobty 2:cd2da920cf98 487 chTotalBits = chTotalBits << 1;
Bobty 2:cd2da920cf98 488 }
Bobty 2:cd2da920cf98 489
Bobty 2:cd2da920cf98 490 // display character
Bobty 2:cd2da920cf98 491 int xOffset = curX / 8;
Bobty 2:cd2da920cf98 492 int bitOffset = curX % 8;
Bobty 2:cd2da920cf98 493 // printf("%c %d %d %d %d %d\n", ch, curX, charWidth, rightShift, xOffset, bitOffset);
Bobty 2:cd2da920cf98 494 if (xOffset >= (dispBufWidth/8))
Bobty 2:cd2da920cf98 495 return 0;
Bobty 2:cd2da920cf98 496 for (int i = 0; i < numLines; i++)
Bobty 2:cd2da920cf98 497 {
Bobty 2:cd2da920cf98 498 uint32_t chBits = charData[i] >> rightShift;
Bobty 2:cd2da920cf98 499 chBits = (chBits << (24-charWidth)) >> bitOffset;
Bobty 2:cd2da920cf98 500 for (int j = 0; j < 3; j++)
Bobty 2:cd2da920cf98 501 {
Bobty 2:cd2da920cf98 502 if (xOffset + j >= (dispBufWidth/8))
Bobty 2:cd2da920cf98 503 break;
Bobty 2:cd2da920cf98 504 _pDisplayBuf[(i + curY) * (dispBufWidth/8) + xOffset + j] |= ((chBits >> (16-j*8)) & 0xff);
Bobty 2:cd2da920cf98 505 }
Bobty 2:cd2da920cf98 506 }
Bobty 2:cd2da920cf98 507
Bobty 2:cd2da920cf98 508 return charWidth;
Bobty 1:79cf2e115449 509 }
Bobty 2:cd2da920cf98 510
Bobty 2:cd2da920cf98 511 // Display line of characters
Bobty 2:cd2da920cf98 512 int LEDMatrix::displayLine(int lineIdx, const char* line)
Bobty 2:cd2da920cf98 513 {
Bobty 2:cd2da920cf98 514 if (lineIdx >= numLines)
Bobty 2:cd2da920cf98 515 lineIdx = 0;
Bobty 2:cd2da920cf98 516 _isBusy = true;
Bobty 2:cd2da920cf98 517 int curX = 0;
Bobty 2:cd2da920cf98 518 int curY = lineIdx * height/numLines;
Bobty 2:cd2da920cf98 519 for (int chIdx = 0; chIdx < strlen(line); chIdx++)
Bobty 2:cd2da920cf98 520 {
Bobty 2:cd2da920cf98 521 curX += displayChar(curX, curY, line[chIdx]) + _charSeparation;
Bobty 2:cd2da920cf98 522 }
Bobty 2:cd2da920cf98 523 _isBusy = false;
Bobty 2:cd2da920cf98 524 return curX;
Bobty 2:cd2da920cf98 525 }
Bobty 2:cd2da920cf98 526