Library for TM1640 LED controller Initial version

Dependents:   mbed_TM1640

See here for more information.

Committer:
wim
Date:
Thu Jan 28 19:25:49 2016 +0000
Revision:
0:7e120ffa56d3
Library for TM1640 LED controller; Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wim 0:7e120ffa56d3 1 /* mbed TM1640 Library, for TM1640 LED controller
wim 0:7e120ffa56d3 2 * Copyright (c) 2016, v01: WH, Initial version
wim 0:7e120ffa56d3 3 *
wim 0:7e120ffa56d3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
wim 0:7e120ffa56d3 5 * of this software and associated documentation files (the "Software"), to deal
wim 0:7e120ffa56d3 6 * in the Software without restriction, inclumosig without limitation the rights
wim 0:7e120ffa56d3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
wim 0:7e120ffa56d3 8 * copies of the Software, and to permit persons to whom the Software is
wim 0:7e120ffa56d3 9 * furnished to do so, subject to the following conditions:
wim 0:7e120ffa56d3 10 *
wim 0:7e120ffa56d3 11 * The above copyright notice and this permission notice shall be included in
wim 0:7e120ffa56d3 12 * all copies or substantial portions of the Software.
wim 0:7e120ffa56d3 13 *
wim 0:7e120ffa56d3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
wim 0:7e120ffa56d3 15 * IMPLIED, INCLUmosiG BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
wim 0:7e120ffa56d3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
wim 0:7e120ffa56d3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
wim 0:7e120ffa56d3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
wim 0:7e120ffa56d3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
wim 0:7e120ffa56d3 20 * THE SOFTWARE.
wim 0:7e120ffa56d3 21 */
wim 0:7e120ffa56d3 22 #include "mbed.h"
wim 0:7e120ffa56d3 23 #include "TM1640.h"
wim 0:7e120ffa56d3 24
wim 0:7e120ffa56d3 25 /** Constructor for class for driving TM1640 LED controller with Serial bus interface device.
wim 0:7e120ffa56d3 26 * @brief Supports 16 digits @ 8 segments.
wim 0:7e120ffa56d3 27 *
wim 0:7e120ffa56d3 28 * @param PinName mosi Serial bus MOSI pin
wim 0:7e120ffa56d3 29 * @param PinName sclk Serial bus SCLK pin
wim 0:7e120ffa56d3 30 */
wim 0:7e120ffa56d3 31 TM1640::TM1640(PinName mosi, PinName sclk) : _mosi(mosi), _sclk(sclk) {
wim 0:7e120ffa56d3 32
wim 0:7e120ffa56d3 33 _init();
wim 0:7e120ffa56d3 34 }
wim 0:7e120ffa56d3 35
wim 0:7e120ffa56d3 36 /** Init the SPI interface and the controller
wim 0:7e120ffa56d3 37 * @param none
wim 0:7e120ffa56d3 38 * @return none
wim 0:7e120ffa56d3 39 */
wim 0:7e120ffa56d3 40 void TM1640::_init(){
wim 0:7e120ffa56d3 41
wim 0:7e120ffa56d3 42 //TM1640 uses Serial bus that looks like SPI, but uses Start and Stop conditions like I2C instead of CS
wim 0:7e120ffa56d3 43 //init Serial bus
wim 0:7e120ffa56d3 44 _mosi=1;
wim 0:7e120ffa56d3 45 _sclk=1;
wim 0:7e120ffa56d3 46
wim 0:7e120ffa56d3 47 //init controller
wim 0:7e120ffa56d3 48 _display = TM1640_DSP_ON;
wim 0:7e120ffa56d3 49 _bright = TM1640_BRT_DEF;
wim 0:7e120ffa56d3 50 _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
wim 0:7e120ffa56d3 51
wim 0:7e120ffa56d3 52 _writeCmd(TM1640_DATA_SET_CMD, TM1640_DATA_WR | TM1640_ADDR_INC | TM1640_MODE_NORM); // Data set cmd, normal mode, auto incr, write data
wim 0:7e120ffa56d3 53 }
wim 0:7e120ffa56d3 54
wim 0:7e120ffa56d3 55
wim 0:7e120ffa56d3 56 /** Clear the screen and locate to 0
wim 0:7e120ffa56d3 57 */
wim 0:7e120ffa56d3 58 void TM1640::cls() {
wim 0:7e120ffa56d3 59
wim 0:7e120ffa56d3 60 _start();
wim 0:7e120ffa56d3 61
wim 0:7e120ffa56d3 62 _write(TM1640_ADDR_SET_CMD | 0x00); // Address set cmd, 0
wim 0:7e120ffa56d3 63 for (int cnt=0; cnt<TM1640_DISPLAY_MEM; cnt++) {
wim 0:7e120ffa56d3 64 _write(0x00); // data
wim 0:7e120ffa56d3 65 }
wim 0:7e120ffa56d3 66
wim 0:7e120ffa56d3 67 _stop();
wim 0:7e120ffa56d3 68 }
wim 0:7e120ffa56d3 69
wim 0:7e120ffa56d3 70 /** Set Brightness
wim 0:7e120ffa56d3 71 *
wim 0:7e120ffa56d3 72 * @param char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle)
wim 0:7e120ffa56d3 73 * @return none
wim 0:7e120ffa56d3 74 */
wim 0:7e120ffa56d3 75 void TM1640::setBrightness(char brightness){
wim 0:7e120ffa56d3 76
wim 0:7e120ffa56d3 77 _bright = brightness & TM1640_BRT_MSK; // mask invalid bits
wim 0:7e120ffa56d3 78
wim 0:7e120ffa56d3 79 _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
wim 0:7e120ffa56d3 80 }
wim 0:7e120ffa56d3 81
wim 0:7e120ffa56d3 82 /** Set the Display mode On/off
wim 0:7e120ffa56d3 83 *
wim 0:7e120ffa56d3 84 * @param bool display mode
wim 0:7e120ffa56d3 85 */
wim 0:7e120ffa56d3 86 void TM1640::setDisplay(bool on) {
wim 0:7e120ffa56d3 87
wim 0:7e120ffa56d3 88 if (on) {
wim 0:7e120ffa56d3 89 _display = TM1640_DSP_ON;
wim 0:7e120ffa56d3 90 }
wim 0:7e120ffa56d3 91 else {
wim 0:7e120ffa56d3 92 _display = TM1640_DSP_OFF;
wim 0:7e120ffa56d3 93 }
wim 0:7e120ffa56d3 94
wim 0:7e120ffa56d3 95 _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
wim 0:7e120ffa56d3 96 }
wim 0:7e120ffa56d3 97
wim 0:7e120ffa56d3 98 /** Write databyte to TM1640
wim 0:7e120ffa56d3 99 * @param int address display memory location to write byte
wim 0:7e120ffa56d3 100 * @param char data byte written at given address
wim 0:7e120ffa56d3 101 * @return none
wim 0:7e120ffa56d3 102 */
wim 0:7e120ffa56d3 103 void TM1640::writeData(char data, int address) {
wim 0:7e120ffa56d3 104
wim 0:7e120ffa56d3 105 _start();
wim 0:7e120ffa56d3 106
wim 0:7e120ffa56d3 107 _write(TM1640_ADDR_SET_CMD | (address & TM1640_ADDR_MSK)); // Set Address cmd
wim 0:7e120ffa56d3 108 _write(data); // data
wim 0:7e120ffa56d3 109
wim 0:7e120ffa56d3 110 _stop();
wim 0:7e120ffa56d3 111 }
wim 0:7e120ffa56d3 112
wim 0:7e120ffa56d3 113 /** Write Display datablock to TM1640
wim 0:7e120ffa56d3 114 * @param DisplayData_t data Array of TM1640_DISPLAY_MEM (=16) bytes for displaydata
wim 0:7e120ffa56d3 115 * @param length number bytes to write (valid range 0..(TM1640_MAX_NR_GRIDS * TM1640_BYTES_PER_GRID) (=16), when starting at address 0)
wim 0:7e120ffa56d3 116 * @param int address display memory location to write bytes (default = 0)
wim 0:7e120ffa56d3 117 * @return none
wim 0:7e120ffa56d3 118 */
wim 0:7e120ffa56d3 119 void TM1640::writeData(DisplayData_t data, int length, int address) {
wim 0:7e120ffa56d3 120
wim 0:7e120ffa56d3 121 _start();
wim 0:7e120ffa56d3 122
wim 0:7e120ffa56d3 123 // sanity check
wim 0:7e120ffa56d3 124 address &= TM1640_ADDR_MSK;
wim 0:7e120ffa56d3 125 if (length < 0) {length = 0;}
wim 0:7e120ffa56d3 126 if ((length + address) > TM1640_DISPLAY_MEM) {length = (TM1640_DISPLAY_MEM - address);}
wim 0:7e120ffa56d3 127
wim 0:7e120ffa56d3 128 // _write(TM1640_ADDR_SET_CMD | 0x00); // Set Address at 0
wim 0:7e120ffa56d3 129 _write(TM1640_ADDR_SET_CMD | address); // Set Address
wim 0:7e120ffa56d3 130
wim 0:7e120ffa56d3 131 for (int idx=0; idx<length; idx++) {
wim 0:7e120ffa56d3 132 // _write(data[idx]); // data
wim 0:7e120ffa56d3 133 _write(data[address + idx]); // data
wim 0:7e120ffa56d3 134 }
wim 0:7e120ffa56d3 135
wim 0:7e120ffa56d3 136 _stop();
wim 0:7e120ffa56d3 137 }
wim 0:7e120ffa56d3 138
wim 0:7e120ffa56d3 139
wim 0:7e120ffa56d3 140 /** Generate Start condition for TM1640
wim 0:7e120ffa56d3 141 * @param none
wim 0:7e120ffa56d3 142 * @return none
wim 0:7e120ffa56d3 143 */
wim 0:7e120ffa56d3 144 void TM1640::_start() {
wim 0:7e120ffa56d3 145
wim 0:7e120ffa56d3 146 _mosi=0;
wim 0:7e120ffa56d3 147 wait_us(1);
wim 0:7e120ffa56d3 148 _sclk=0;
wim 0:7e120ffa56d3 149 wait_us(1);
wim 0:7e120ffa56d3 150 }
wim 0:7e120ffa56d3 151
wim 0:7e120ffa56d3 152 /** Generate Stop condition for TM1640
wim 0:7e120ffa56d3 153 * @param none
wim 0:7e120ffa56d3 154 * @return none
wim 0:7e120ffa56d3 155 */
wim 0:7e120ffa56d3 156 void TM1640::_stop() {
wim 0:7e120ffa56d3 157
wim 0:7e120ffa56d3 158 _mosi=0;
wim 0:7e120ffa56d3 159 wait_us(1);
wim 0:7e120ffa56d3 160 _sclk=1;
wim 0:7e120ffa56d3 161 wait_us(1);
wim 0:7e120ffa56d3 162 _mosi=1;
wim 0:7e120ffa56d3 163 wait_us(1);
wim 0:7e120ffa56d3 164 }
wim 0:7e120ffa56d3 165
wim 0:7e120ffa56d3 166 /** Send byte to TM1640
wim 0:7e120ffa56d3 167 * @param int data
wim 0:7e120ffa56d3 168 * @return none
wim 0:7e120ffa56d3 169 */
wim 0:7e120ffa56d3 170 void TM1640::_write(int data) {
wim 0:7e120ffa56d3 171
wim 0:7e120ffa56d3 172 for (int bit=0; bit<8; bit++) {
wim 0:7e120ffa56d3 173 //The TM1640 expects LSB first, whereas SPI is MSB first
wim 0:7e120ffa56d3 174 if (((data >> bit) & 0x01) == 0x01) {
wim 0:7e120ffa56d3 175 _mosi=1;
wim 0:7e120ffa56d3 176 }
wim 0:7e120ffa56d3 177 else {
wim 0:7e120ffa56d3 178 _mosi=0;
wim 0:7e120ffa56d3 179 }
wim 0:7e120ffa56d3 180 wait_us(1);
wim 0:7e120ffa56d3 181 _sclk=1;
wim 0:7e120ffa56d3 182 wait_us(1);
wim 0:7e120ffa56d3 183 _sclk=0;
wim 0:7e120ffa56d3 184 wait_us(1);
wim 0:7e120ffa56d3 185 }
wim 0:7e120ffa56d3 186 }
wim 0:7e120ffa56d3 187
wim 0:7e120ffa56d3 188
wim 0:7e120ffa56d3 189 /** Write command and parameter to TM1640
wim 0:7e120ffa56d3 190 * @param int cmd Command byte
wim 0:7e120ffa56d3 191 * &Param int data Parameters for command
wim 0:7e120ffa56d3 192 * @return none
wim 0:7e120ffa56d3 193 */
wim 0:7e120ffa56d3 194 void TM1640::_writeCmd(int cmd, int data){
wim 0:7e120ffa56d3 195
wim 0:7e120ffa56d3 196 _start();
wim 0:7e120ffa56d3 197
wim 0:7e120ffa56d3 198 _write((cmd & TM1640_CMD_MSK) | (data & ~TM1640_CMD_MSK));
wim 0:7e120ffa56d3 199
wim 0:7e120ffa56d3 200 _stop();
wim 0:7e120ffa56d3 201 }
wim 0:7e120ffa56d3 202
wim 0:7e120ffa56d3 203
wim 0:7e120ffa56d3 204 #if (LM1640_TEST == 1)
wim 0:7e120ffa56d3 205 // Derived class for TM1640 used in LED&KEY display unit
wim 0:7e120ffa56d3 206 //
wim 0:7e120ffa56d3 207
wim 0:7e120ffa56d3 208 /** Constructor for class for driving TM1640 LED controller as used in LM1640
wim 0:7e120ffa56d3 209 *
wim 0:7e120ffa56d3 210 * @brief Supports 8 Digits of 7 Segments + DP.
wim 0:7e120ffa56d3 211 *
wim 0:7e120ffa56d3 212 * @param PinName mosi Serial bus MOSI pin
wim 0:7e120ffa56d3 213 * @param PinName sclk Serial bus SCLK pin
wim 0:7e120ffa56d3 214 */
wim 0:7e120ffa56d3 215 TM1640_LM1640::TM1640_LM1640(PinName mosi, PinName sclk) : TM1640(mosi, sclk) {
wim 0:7e120ffa56d3 216 _column = 0;
wim 0:7e120ffa56d3 217 _columns = LM1640_NR_DIGITS;
wim 0:7e120ffa56d3 218 }
wim 0:7e120ffa56d3 219
wim 0:7e120ffa56d3 220 #if(0)
wim 0:7e120ffa56d3 221 #if DOXYGEN_ONLY
wim 0:7e120ffa56d3 222 /** Write a character to the Display
wim 0:7e120ffa56d3 223 *
wim 0:7e120ffa56d3 224 * @param c The character to write to the display
wim 0:7e120ffa56d3 225 */
wim 0:7e120ffa56d3 226 int putc(int c);
wim 0:7e120ffa56d3 227
wim 0:7e120ffa56d3 228 /** Write a formatted string to the Display
wim 0:7e120ffa56d3 229 *
wim 0:7e120ffa56d3 230 * @param format A printf-style format string, followed by the
wim 0:7e120ffa56d3 231 * variables to use in formatting the string.
wim 0:7e120ffa56d3 232 */
wim 0:7e120ffa56d3 233 int printf(const char* format, ...);
wim 0:7e120ffa56d3 234 #endif
wim 0:7e120ffa56d3 235 #endif
wim 0:7e120ffa56d3 236
wim 0:7e120ffa56d3 237 /** Locate cursor to a screen column
wim 0:7e120ffa56d3 238 *
wim 0:7e120ffa56d3 239 * @param column The horizontal position from the left, indexed from 0
wim 0:7e120ffa56d3 240 */
wim 0:7e120ffa56d3 241 void TM1640_LM1640::locate(int column) {
wim 0:7e120ffa56d3 242 //sanity check
wim 0:7e120ffa56d3 243 if (column < 0) {column = 0;}
wim 0:7e120ffa56d3 244 if (column > (_columns - 1)) {column = _columns - 1;}
wim 0:7e120ffa56d3 245
wim 0:7e120ffa56d3 246 _column = column;
wim 0:7e120ffa56d3 247 }
wim 0:7e120ffa56d3 248
wim 0:7e120ffa56d3 249
wim 0:7e120ffa56d3 250 /** Number of screen columns
wim 0:7e120ffa56d3 251 *
wim 0:7e120ffa56d3 252 * @param none
wim 0:7e120ffa56d3 253 * @return columns
wim 0:7e120ffa56d3 254 */
wim 0:7e120ffa56d3 255 int TM1640_LM1640::columns() {
wim 0:7e120ffa56d3 256 return _columns;
wim 0:7e120ffa56d3 257 }
wim 0:7e120ffa56d3 258
wim 0:7e120ffa56d3 259
wim 0:7e120ffa56d3 260 /** Clear the screen and locate to 0
wim 0:7e120ffa56d3 261 * @param bool clrAll Clear Icons also (default = false)
wim 0:7e120ffa56d3 262 */
wim 0:7e120ffa56d3 263 void TM1640_LM1640::cls(bool clrAll) {
wim 0:7e120ffa56d3 264
wim 0:7e120ffa56d3 265 if (clrAll) {
wim 0:7e120ffa56d3 266 //clear local buffer (inclumosig Icons)
wim 0:7e120ffa56d3 267 for (int idx=0; idx < LM1640_NR_GRIDS; idx++) {
wim 0:7e120ffa56d3 268 _displaybuffer[idx] = 0x00;
wim 0:7e120ffa56d3 269 }
wim 0:7e120ffa56d3 270 }
wim 0:7e120ffa56d3 271 else {
wim 0:7e120ffa56d3 272 //clear local buffer (preserving Icons)
wim 0:7e120ffa56d3 273 for (int idx=0; idx < LM1640_NR_GRIDS; idx++) {
wim 0:7e120ffa56d3 274 _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];
wim 0:7e120ffa56d3 275 }
wim 0:7e120ffa56d3 276 }
wim 0:7e120ffa56d3 277
wim 0:7e120ffa56d3 278 writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
wim 0:7e120ffa56d3 279
wim 0:7e120ffa56d3 280 _column = 0;
wim 0:7e120ffa56d3 281 }
wim 0:7e120ffa56d3 282
wim 0:7e120ffa56d3 283 /** Set Icon
wim 0:7e120ffa56d3 284 *
wim 0:7e120ffa56d3 285 * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
wim 0:7e120ffa56d3 286 * @return none
wim 0:7e120ffa56d3 287 */
wim 0:7e120ffa56d3 288 void TM1640_LM1640::setIcon(Icon icon) {
wim 0:7e120ffa56d3 289 int addr, icn;
wim 0:7e120ffa56d3 290
wim 0:7e120ffa56d3 291 icn = icon & 0xFFFF;
wim 0:7e120ffa56d3 292 addr = (icon >> 24) & 0xFF;
wim 0:7e120ffa56d3 293 addr = (addr - 1);
wim 0:7e120ffa56d3 294
wim 0:7e120ffa56d3 295 //Save char...and set bits for icon to write
wim 0:7e120ffa56d3 296 _displaybuffer[addr] = _displaybuffer[addr] | LO(icn);
wim 0:7e120ffa56d3 297 // writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
wim 0:7e120ffa56d3 298 writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr);
wim 0:7e120ffa56d3 299 }
wim 0:7e120ffa56d3 300
wim 0:7e120ffa56d3 301 /** Clr Icon
wim 0:7e120ffa56d3 302 *
wim 0:7e120ffa56d3 303 * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
wim 0:7e120ffa56d3 304 * @return none
wim 0:7e120ffa56d3 305 */
wim 0:7e120ffa56d3 306 void TM1640_LM1640::clrIcon(Icon icon) {
wim 0:7e120ffa56d3 307 int addr, icn;
wim 0:7e120ffa56d3 308
wim 0:7e120ffa56d3 309 icn = icon & 0xFFFF;
wim 0:7e120ffa56d3 310 addr = (icon >> 24) & 0xFF;
wim 0:7e120ffa56d3 311 addr = (addr - 1);
wim 0:7e120ffa56d3 312
wim 0:7e120ffa56d3 313 //Save char...and clr bits for icon to write
wim 0:7e120ffa56d3 314 _displaybuffer[addr] = _displaybuffer[addr] & ~LO(icn);
wim 0:7e120ffa56d3 315 // writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
wim 0:7e120ffa56d3 316 writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr);
wim 0:7e120ffa56d3 317 }
wim 0:7e120ffa56d3 318
wim 0:7e120ffa56d3 319
wim 0:7e120ffa56d3 320 /** Set User Defined Characters (UDC)
wim 0:7e120ffa56d3 321 *
wim 0:7e120ffa56d3 322 * @param unsigned char udc_idx The Index of the UDC (0..7)
wim 0:7e120ffa56d3 323 * @param int udc_data The bitpattern for the UDC (8 bits)
wim 0:7e120ffa56d3 324 */
wim 0:7e120ffa56d3 325 void TM1640_LM1640::setUDC(unsigned char udc_idx, int udc_data) {
wim 0:7e120ffa56d3 326
wim 0:7e120ffa56d3 327 //Sanity check
wim 0:7e120ffa56d3 328 if (udc_idx > (LM1640_NR_UDC-1)) {
wim 0:7e120ffa56d3 329 return;
wim 0:7e120ffa56d3 330 }
wim 0:7e120ffa56d3 331 // Mask out Icon bits?
wim 0:7e120ffa56d3 332
wim 0:7e120ffa56d3 333 _UDC_7S[udc_idx] = LO(udc_data);
wim 0:7e120ffa56d3 334 }
wim 0:7e120ffa56d3 335
wim 0:7e120ffa56d3 336
wim 0:7e120ffa56d3 337 /** Write a single character (Stream implementation)
wim 0:7e120ffa56d3 338 */
wim 0:7e120ffa56d3 339 int TM1640_LM1640::_putc(int value) {
wim 0:7e120ffa56d3 340 int addr;
wim 0:7e120ffa56d3 341 bool validChar = false;
wim 0:7e120ffa56d3 342 char pattern = 0x00;
wim 0:7e120ffa56d3 343
wim 0:7e120ffa56d3 344 if ((value == '\n') || (value == '\r')) {
wim 0:7e120ffa56d3 345 //No character to write
wim 0:7e120ffa56d3 346 validChar = false;
wim 0:7e120ffa56d3 347
wim 0:7e120ffa56d3 348 //Update Cursor
wim 0:7e120ffa56d3 349 _column = 0;
wim 0:7e120ffa56d3 350 }
wim 0:7e120ffa56d3 351 else if ((value == '.') || (value == ',')) {
wim 0:7e120ffa56d3 352 //No character to write
wim 0:7e120ffa56d3 353 validChar = false;
wim 0:7e120ffa56d3 354 pattern = S7_DP; // placeholder for all DPs
wim 0:7e120ffa56d3 355
wim 0:7e120ffa56d3 356 // Check to see that DP can be shown for current column
wim 0:7e120ffa56d3 357 if (_column > 0) {
wim 0:7e120ffa56d3 358 //Translate between _column and displaybuffer entries
wim 0:7e120ffa56d3 359 //Add DP to bitpattern of digit left of current column.
wim 0:7e120ffa56d3 360 addr = (_column - 1);
wim 0:7e120ffa56d3 361
wim 0:7e120ffa56d3 362 //Save icons...and set bits for decimal point to write
wim 0:7e120ffa56d3 363 _displaybuffer[addr] = _displaybuffer[addr] | pattern;
wim 0:7e120ffa56d3 364 // writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
wim 0:7e120ffa56d3 365 writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr);
wim 0:7e120ffa56d3 366
wim 0:7e120ffa56d3 367 //No Cursor Update
wim 0:7e120ffa56d3 368 }
wim 0:7e120ffa56d3 369 }
wim 0:7e120ffa56d3 370 else if ((value >= 0) && (value < LM1640_NR_UDC)) {
wim 0:7e120ffa56d3 371 //Character to write
wim 0:7e120ffa56d3 372 validChar = true;
wim 0:7e120ffa56d3 373 pattern = _UDC_7S[value];
wim 0:7e120ffa56d3 374 }
wim 0:7e120ffa56d3 375
wim 0:7e120ffa56d3 376 #if (SHOW_ASCII == 1)
wim 0:7e120ffa56d3 377 //display all ASCII characters
wim 0:7e120ffa56d3 378 else if ((value >= FONT_7S_START) && (value <= FONT_7S_END)) {
wim 0:7e120ffa56d3 379 //Character to write
wim 0:7e120ffa56d3 380 validChar = true;
wim 0:7e120ffa56d3 381 pattern = FONT_7S[value - FONT_7S_START];
wim 0:7e120ffa56d3 382 } // else
wim 0:7e120ffa56d3 383 #else
wim 0:7e120ffa56d3 384 //display only digits and hex characters
wim 0:7e120ffa56d3 385 else if (value == '-') {
wim 0:7e120ffa56d3 386 //Character to write
wim 0:7e120ffa56d3 387 validChar = true;
wim 0:7e120ffa56d3 388 pattern = C7_MIN;
wim 0:7e120ffa56d3 389 }
wim 0:7e120ffa56d3 390 else if ((value >= (int)'0') && (value <= (int) '9')) {
wim 0:7e120ffa56d3 391 //Character to write
wim 0:7e120ffa56d3 392 validChar = true;
wim 0:7e120ffa56d3 393 pattern = FONT_7S[value - (int) '0'];
wim 0:7e120ffa56d3 394 }
wim 0:7e120ffa56d3 395 else if ((value >= (int) 'A') && (value <= (int) 'F')) {
wim 0:7e120ffa56d3 396 //Character to write
wim 0:7e120ffa56d3 397 validChar = true;
wim 0:7e120ffa56d3 398 pattern = FONT_7S[10 + value - (int) 'A'];
wim 0:7e120ffa56d3 399 }
wim 0:7e120ffa56d3 400 else if ((value >= (int) 'a') && (value <= (int) 'f')) {
wim 0:7e120ffa56d3 401 //Character to write
wim 0:7e120ffa56d3 402 validChar = true;
wim 0:7e120ffa56d3 403 pattern = FONT_7S[10 + value - (int) 'a'];
wim 0:7e120ffa56d3 404 } //else
wim 0:7e120ffa56d3 405 #endif
wim 0:7e120ffa56d3 406
wim 0:7e120ffa56d3 407 if (validChar) {
wim 0:7e120ffa56d3 408 //Character to write
wim 0:7e120ffa56d3 409
wim 0:7e120ffa56d3 410 //Translate between _column and displaybuffer entries
wim 0:7e120ffa56d3 411 addr = _column;
wim 0:7e120ffa56d3 412
wim 0:7e120ffa56d3 413 //Save icons...and set bits for character to write
wim 0:7e120ffa56d3 414 _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[_column]) | pattern;
wim 0:7e120ffa56d3 415
wim 0:7e120ffa56d3 416 // writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
wim 0:7e120ffa56d3 417 writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr);
wim 0:7e120ffa56d3 418
wim 0:7e120ffa56d3 419 //Update Cursor
wim 0:7e120ffa56d3 420 _column++;
wim 0:7e120ffa56d3 421 if (_column > (LM1640_NR_DIGITS - 1)) {
wim 0:7e120ffa56d3 422 _column = 0;
wim 0:7e120ffa56d3 423 }
wim 0:7e120ffa56d3 424
wim 0:7e120ffa56d3 425 } // if validChar
wim 0:7e120ffa56d3 426
wim 0:7e120ffa56d3 427 return value;
wim 0:7e120ffa56d3 428 }
wim 0:7e120ffa56d3 429
wim 0:7e120ffa56d3 430
wim 0:7e120ffa56d3 431 // get a single character (Stream implementation)
wim 0:7e120ffa56d3 432 int TM1640_LM1640::_getc() {
wim 0:7e120ffa56d3 433 return -1;
wim 0:7e120ffa56d3 434 }
wim 0:7e120ffa56d3 435
wim 0:7e120ffa56d3 436 #endif