Library for the MAX7219 LED display driver
Fork of MAX7219 by
max7219.cpp@6:7e3d1bcc15df, 2018-04-28 (annotated)
- Committer:
- viewdeep51
- Date:
- Sat Apr 28 10:15:36 2018 +0000
- Revision:
- 6:7e3d1bcc15df
- Parent:
- 5:0912d18d072f
final_code dated 28/04/18
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
j3 | 0:798fb343e022 | 1 | /******************************************************************//** |
j3 | 0:798fb343e022 | 2 | * @file max7219.cpp |
j3 | 0:798fb343e022 | 3 | * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. |
j3 | 0:798fb343e022 | 4 | * |
j3 | 0:798fb343e022 | 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
j3 | 0:798fb343e022 | 6 | * copy of this software and associated documentation files (the "Software"), |
j3 | 0:798fb343e022 | 7 | * to deal in the Software without restriction, including without limitation |
j3 | 0:798fb343e022 | 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
j3 | 0:798fb343e022 | 9 | * and/or sell copies of the Software, and to permit persons to whom the |
j3 | 0:798fb343e022 | 10 | * Software is furnished to do so, subject to the following conditions: |
j3 | 0:798fb343e022 | 11 | * |
j3 | 0:798fb343e022 | 12 | * The above copyright notice and this permission notice shall be included |
j3 | 0:798fb343e022 | 13 | * in all copies or substantial portions of the Software. |
j3 | 0:798fb343e022 | 14 | * |
j3 | 0:798fb343e022 | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
j3 | 0:798fb343e022 | 16 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
j3 | 0:798fb343e022 | 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
j3 | 0:798fb343e022 | 18 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
j3 | 0:798fb343e022 | 19 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
j3 | 0:798fb343e022 | 20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
j3 | 0:798fb343e022 | 21 | * OTHER DEALINGS IN THE SOFTWARE. |
j3 | 0:798fb343e022 | 22 | * |
j3 | 0:798fb343e022 | 23 | * Except as contained in this notice, the name of Maxim Integrated |
j3 | 0:798fb343e022 | 24 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
j3 | 0:798fb343e022 | 25 | * Products, Inc. Branding Policy. |
j3 | 0:798fb343e022 | 26 | * |
j3 | 0:798fb343e022 | 27 | * The mere transfer of this software does not imply any licenses |
j3 | 0:798fb343e022 | 28 | * of trade secrets, proprietary technology, copyrights, patents, |
j3 | 0:798fb343e022 | 29 | * trademarks, maskwork rights, or any other form of intellectual |
j3 | 0:798fb343e022 | 30 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
j3 | 0:798fb343e022 | 31 | * ownership rights. |
j3 | 0:798fb343e022 | 32 | **********************************************************************/ |
j3 | 0:798fb343e022 | 33 | |
j3 | 0:798fb343e022 | 34 | |
j3 | 0:798fb343e022 | 35 | #include "max7219.h" |
j3 | 0:798fb343e022 | 36 | |
j3 | 0:798fb343e022 | 37 | |
j3 | 0:798fb343e022 | 38 | //********************************************************************* |
j3 | 0:798fb343e022 | 39 | Max7219::Max7219(SPI *spi_bus, PinName cs): _p_spi(spi_bus) |
j3 | 0:798fb343e022 | 40 | { |
j3 | 0:798fb343e022 | 41 | _num_devices = 1; |
j3 | 0:798fb343e022 | 42 | |
j3 | 0:798fb343e022 | 43 | _p_cs = new DigitalOut(cs, 1); |
j3 | 0:798fb343e022 | 44 | _spi_owner = false; |
j3 | 0:798fb343e022 | 45 | } |
j3 | 0:798fb343e022 | 46 | |
j3 | 0:798fb343e022 | 47 | |
j3 | 0:798fb343e022 | 48 | //********************************************************************* |
j3 | 0:798fb343e022 | 49 | Max7219::Max7219(PinName mosi, PinName miso, PinName sclk, PinName cs) |
j3 | 0:798fb343e022 | 50 | { |
j3 | 0:798fb343e022 | 51 | _num_devices = 1; |
j3 | 0:798fb343e022 | 52 | |
j3 | 0:798fb343e022 | 53 | _p_spi = new SPI(mosi, miso, sclk); |
j3 | 0:798fb343e022 | 54 | _p_cs = new DigitalOut(cs, 1); |
j3 | 0:798fb343e022 | 55 | |
j3 | 0:798fb343e022 | 56 | _spi_owner = true; |
j3 | 0:798fb343e022 | 57 | } |
j3 | 0:798fb343e022 | 58 | |
j3 | 0:798fb343e022 | 59 | |
j3 | 0:798fb343e022 | 60 | //********************************************************************* |
j3 | 0:798fb343e022 | 61 | Max7219::~Max7219() |
j3 | 0:798fb343e022 | 62 | { |
j3 | 0:798fb343e022 | 63 | delete _p_cs; |
j3 | 0:798fb343e022 | 64 | |
j3 | 0:798fb343e022 | 65 | if(_spi_owner) |
j3 | 0:798fb343e022 | 66 | { |
j3 | 0:798fb343e022 | 67 | delete _p_spi; |
j3 | 0:798fb343e022 | 68 | } |
j3 | 0:798fb343e022 | 69 | } |
j3 | 0:798fb343e022 | 70 | |
j3 | 0:798fb343e022 | 71 | |
j3 | 0:798fb343e022 | 72 | //********************************************************************* |
j3 | 0:798fb343e022 | 73 | int32_t Max7219::set_num_devices(uint8_t num_devices) |
j3 | 0:798fb343e022 | 74 | { |
j3 | 0:798fb343e022 | 75 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 76 | |
j3 | 0:798fb343e022 | 77 | if(num_devices > 0) |
j3 | 0:798fb343e022 | 78 | { |
j3 | 0:798fb343e022 | 79 | _num_devices = num_devices; |
j3 | 0:798fb343e022 | 80 | rtn_val = _num_devices; |
j3 | 0:798fb343e022 | 81 | } |
j3 | 0:798fb343e022 | 82 | |
j3 | 0:798fb343e022 | 83 | return(rtn_val); |
j3 | 0:798fb343e022 | 84 | } |
j3 | 0:798fb343e022 | 85 | |
j3 | 0:798fb343e022 | 86 | |
j3 | 0:798fb343e022 | 87 | //********************************************************************* |
j3 | 0:798fb343e022 | 88 | void Max7219::set_display_test(void) |
j3 | 0:798fb343e022 | 89 | { |
j3 | 0:798fb343e022 | 90 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 91 | |
j3 | 0:798fb343e022 | 92 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 93 | for(idx = 0; idx < _num_devices; idx++) |
j3 | 0:798fb343e022 | 94 | { |
j3 | 0:798fb343e022 | 95 | _p_spi->write(MAX7219_DISPLAY_TEST); |
j3 | 0:798fb343e022 | 96 | _p_spi->write(1); |
j3 | 0:798fb343e022 | 97 | } |
j3 | 0:798fb343e022 | 98 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 99 | } |
j3 | 0:798fb343e022 | 100 | |
j3 | 0:798fb343e022 | 101 | |
j3 | 0:798fb343e022 | 102 | //********************************************************************* |
j3 | 0:798fb343e022 | 103 | void Max7219::clear_display_test(void) |
j3 | 0:798fb343e022 | 104 | { |
j3 | 0:798fb343e022 | 105 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 106 | |
j3 | 0:798fb343e022 | 107 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 108 | for(idx = 0; idx < _num_devices; idx++) |
j3 | 0:798fb343e022 | 109 | { |
j3 | 0:798fb343e022 | 110 | _p_spi->write(MAX7219_DISPLAY_TEST); |
j3 | 0:798fb343e022 | 111 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 112 | } |
j3 | 0:798fb343e022 | 113 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 114 | } |
j3 | 0:798fb343e022 | 115 | |
j3 | 0:798fb343e022 | 116 | |
j3 | 0:798fb343e022 | 117 | //********************************************************************* |
j3 | 1:90a7cf4e7d26 | 118 | int32_t Max7219::init_device(max7219_configuration_t config) |
j3 | 0:798fb343e022 | 119 | { |
j3 | 0:798fb343e022 | 120 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 121 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 122 | |
j3 | 0:798fb343e022 | 123 | if(config.device_number > _num_devices) |
j3 | 0:798fb343e022 | 124 | { |
j3 | 0:798fb343e022 | 125 | rtn_val = -1; |
j3 | 0:798fb343e022 | 126 | } |
j3 | 0:798fb343e022 | 127 | else if(config.device_number == 0) |
j3 | 0:798fb343e022 | 128 | { |
j3 | 0:798fb343e022 | 129 | //device numbering starts with index 1 |
j3 | 0:798fb343e022 | 130 | rtn_val = -2; |
j3 | 0:798fb343e022 | 131 | } |
j3 | 0:798fb343e022 | 132 | else |
j3 | 0:798fb343e022 | 133 | { |
j3 | 0:798fb343e022 | 134 | //write DECODE_MODE register of device |
j3 | 0:798fb343e022 | 135 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 136 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 137 | { |
j3 | 0:798fb343e022 | 138 | if(config.device_number == idx) |
j3 | 0:798fb343e022 | 139 | { |
j3 | 0:798fb343e022 | 140 | _p_spi->write(MAX7219_DECODE_MODE); |
j3 | 0:798fb343e022 | 141 | _p_spi->write(config.decode_mode); |
j3 | 0:798fb343e022 | 142 | } |
j3 | 0:798fb343e022 | 143 | else |
j3 | 0:798fb343e022 | 144 | { |
j3 | 0:798fb343e022 | 145 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 146 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 147 | } |
j3 | 0:798fb343e022 | 148 | } |
j3 | 0:798fb343e022 | 149 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 150 | |
j3 | 0:798fb343e022 | 151 | wait_us(1); |
j3 | 0:798fb343e022 | 152 | |
j3 | 0:798fb343e022 | 153 | //write INTENSITY register of device |
j3 | 0:798fb343e022 | 154 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 155 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 156 | { |
j3 | 0:798fb343e022 | 157 | if(config.device_number == idx) |
j3 | 0:798fb343e022 | 158 | { |
j3 | 0:798fb343e022 | 159 | _p_spi->write(MAX7219_INTENSITY); |
j3 | 0:798fb343e022 | 160 | _p_spi->write(config.intensity); |
j3 | 0:798fb343e022 | 161 | } |
j3 | 0:798fb343e022 | 162 | else |
j3 | 0:798fb343e022 | 163 | { |
j3 | 0:798fb343e022 | 164 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 165 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 166 | } |
j3 | 0:798fb343e022 | 167 | } |
j3 | 0:798fb343e022 | 168 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 169 | |
j3 | 0:798fb343e022 | 170 | wait_us(1); |
j3 | 0:798fb343e022 | 171 | |
j3 | 0:798fb343e022 | 172 | //write SCAN_LIMT register of device |
j3 | 0:798fb343e022 | 173 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 174 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 175 | { |
j3 | 0:798fb343e022 | 176 | if(config.device_number == idx) |
j3 | 0:798fb343e022 | 177 | { |
j3 | 0:798fb343e022 | 178 | _p_spi->write(MAX7219_SCAN_LIMIT); |
j3 | 0:798fb343e022 | 179 | _p_spi->write(config.scan_limit); |
j3 | 0:798fb343e022 | 180 | } |
j3 | 0:798fb343e022 | 181 | else |
j3 | 0:798fb343e022 | 182 | { |
j3 | 0:798fb343e022 | 183 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 184 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 185 | } |
j3 | 0:798fb343e022 | 186 | } |
j3 | 0:798fb343e022 | 187 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 188 | |
j3 | 0:798fb343e022 | 189 | wait_us(1); |
j3 | 0:798fb343e022 | 190 | |
j3 | 0:798fb343e022 | 191 | rtn_val = 0; |
j3 | 0:798fb343e022 | 192 | } |
j3 | 0:798fb343e022 | 193 | |
j3 | 0:798fb343e022 | 194 | return(rtn_val); |
j3 | 0:798fb343e022 | 195 | } |
j3 | 0:798fb343e022 | 196 | |
j3 | 0:798fb343e022 | 197 | |
j3 | 0:798fb343e022 | 198 | //********************************************************************* |
j3 | 0:798fb343e022 | 199 | void Max7219::init_display(max7219_configuration_t config) |
j3 | 0:798fb343e022 | 200 | { |
j3 | 0:798fb343e022 | 201 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 202 | |
j3 | 0:798fb343e022 | 203 | //write DECODE_MODE register of all devices |
j3 | 0:798fb343e022 | 204 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 205 | for(idx = 0; idx < _num_devices; idx++) |
j3 | 0:798fb343e022 | 206 | { |
j3 | 0:798fb343e022 | 207 | _p_spi->write(MAX7219_DECODE_MODE); |
j3 | 0:798fb343e022 | 208 | _p_spi->write(config.decode_mode); |
j3 | 0:798fb343e022 | 209 | } |
j3 | 0:798fb343e022 | 210 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 211 | |
j3 | 0:798fb343e022 | 212 | wait_us(1); |
j3 | 0:798fb343e022 | 213 | |
j3 | 0:798fb343e022 | 214 | //write INTENSITY register of all devices |
j3 | 0:798fb343e022 | 215 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 216 | for(idx = 0; idx < _num_devices; idx++) |
j3 | 0:798fb343e022 | 217 | { |
j3 | 0:798fb343e022 | 218 | _p_spi->write(MAX7219_INTENSITY); |
j3 | 0:798fb343e022 | 219 | _p_spi->write(config.intensity); |
j3 | 0:798fb343e022 | 220 | } |
j3 | 0:798fb343e022 | 221 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 222 | |
j3 | 0:798fb343e022 | 223 | wait_us(1); |
j3 | 0:798fb343e022 | 224 | |
j3 | 0:798fb343e022 | 225 | //write SCAN_LIMT register of all devices |
j3 | 0:798fb343e022 | 226 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 227 | for(idx = 0; idx < _num_devices; idx++) |
j3 | 0:798fb343e022 | 228 | { |
j3 | 0:798fb343e022 | 229 | _p_spi->write(MAX7219_SCAN_LIMIT); |
j3 | 0:798fb343e022 | 230 | _p_spi->write(config.scan_limit); |
j3 | 0:798fb343e022 | 231 | } |
j3 | 0:798fb343e022 | 232 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 233 | |
j3 | 0:798fb343e022 | 234 | wait_us(1); |
j3 | 0:798fb343e022 | 235 | } |
j3 | 0:798fb343e022 | 236 | |
viewdeep51 | 5:0912d18d072f | 237 | //************************************************************* |
viewdeep51 | 5:0912d18d072f | 238 | void Max7219::set_intensity(max7219_configuration_t config) |
viewdeep51 | 5:0912d18d072f | 239 | { |
viewdeep51 | 5:0912d18d072f | 240 | uint8_t idx = 0; |
viewdeep51 | 5:0912d18d072f | 241 | wait_us(1); |
viewdeep51 | 5:0912d18d072f | 242 | |
viewdeep51 | 5:0912d18d072f | 243 | //write INTENSITY register of device |
viewdeep51 | 5:0912d18d072f | 244 | _p_cs->write(0); |
viewdeep51 | 5:0912d18d072f | 245 | for(idx = _num_devices; idx > 0; idx--) |
viewdeep51 | 5:0912d18d072f | 246 | { |
viewdeep51 | 5:0912d18d072f | 247 | if(config.device_number == idx) |
viewdeep51 | 5:0912d18d072f | 248 | { |
viewdeep51 | 5:0912d18d072f | 249 | _p_spi->write(MAX7219_INTENSITY); |
viewdeep51 | 5:0912d18d072f | 250 | _p_spi->write(config.intensity); |
viewdeep51 | 5:0912d18d072f | 251 | } |
viewdeep51 | 5:0912d18d072f | 252 | else |
viewdeep51 | 5:0912d18d072f | 253 | { |
viewdeep51 | 5:0912d18d072f | 254 | _p_spi->write(MAX7219_NO_OP); |
viewdeep51 | 5:0912d18d072f | 255 | _p_spi->write(0); |
viewdeep51 | 5:0912d18d072f | 256 | } |
viewdeep51 | 5:0912d18d072f | 257 | } |
viewdeep51 | 5:0912d18d072f | 258 | _p_cs->write(1); |
viewdeep51 | 5:0912d18d072f | 259 | |
viewdeep51 | 5:0912d18d072f | 260 | wait_us(1); |
viewdeep51 | 5:0912d18d072f | 261 | } |
j3 | 0:798fb343e022 | 262 | |
j3 | 0:798fb343e022 | 263 | //********************************************************************* |
j3 | 0:798fb343e022 | 264 | int32_t Max7219::enable_device(uint8_t device_number) |
j3 | 0:798fb343e022 | 265 | { |
j3 | 0:798fb343e022 | 266 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 267 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 268 | |
j3 | 0:798fb343e022 | 269 | if(device_number > _num_devices) |
j3 | 0:798fb343e022 | 270 | { |
j3 | 0:798fb343e022 | 271 | rtn_val = -1; |
j3 | 0:798fb343e022 | 272 | } |
j3 | 0:798fb343e022 | 273 | else if(device_number == 0) |
j3 | 0:798fb343e022 | 274 | { |
j3 | 0:798fb343e022 | 275 | //device numbering starts with index 1 |
j3 | 0:798fb343e022 | 276 | rtn_val = -2; |
j3 | 0:798fb343e022 | 277 | } |
j3 | 0:798fb343e022 | 278 | else |
j3 | 0:798fb343e022 | 279 | { |
j3 | 0:798fb343e022 | 280 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 281 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 282 | { |
j3 | 0:798fb343e022 | 283 | if(device_number == idx) |
j3 | 0:798fb343e022 | 284 | { |
j3 | 0:798fb343e022 | 285 | _p_spi->write(MAX7219_SHUTDOWN); |
j3 | 0:798fb343e022 | 286 | _p_spi->write(1); |
j3 | 0:798fb343e022 | 287 | } |
j3 | 0:798fb343e022 | 288 | else |
j3 | 0:798fb343e022 | 289 | { |
j3 | 0:798fb343e022 | 290 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 291 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 292 | } |
j3 | 0:798fb343e022 | 293 | } |
j3 | 0:798fb343e022 | 294 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 295 | |
j3 | 0:798fb343e022 | 296 | rtn_val = 0; |
j3 | 0:798fb343e022 | 297 | } |
j3 | 0:798fb343e022 | 298 | |
j3 | 0:798fb343e022 | 299 | return(rtn_val); |
j3 | 0:798fb343e022 | 300 | } |
j3 | 0:798fb343e022 | 301 | |
j3 | 0:798fb343e022 | 302 | |
j3 | 0:798fb343e022 | 303 | //********************************************************************* |
viewdeep51 | 6:7e3d1bcc15df | 304 | |
j3 | 0:798fb343e022 | 305 | |
j3 | 0:798fb343e022 | 306 | |
j3 | 0:798fb343e022 | 307 | //********************************************************************* |
j3 | 0:798fb343e022 | 308 | int32_t Max7219::disable_device(uint8_t device_number) |
j3 | 0:798fb343e022 | 309 | { |
j3 | 0:798fb343e022 | 310 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 311 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 312 | |
j3 | 0:798fb343e022 | 313 | if(device_number > _num_devices) |
j3 | 0:798fb343e022 | 314 | { |
j3 | 0:798fb343e022 | 315 | rtn_val = -1; |
j3 | 0:798fb343e022 | 316 | } |
j3 | 0:798fb343e022 | 317 | else if(device_number == 0) |
j3 | 0:798fb343e022 | 318 | { |
j3 | 0:798fb343e022 | 319 | //device numbering starts with index 1 |
j3 | 0:798fb343e022 | 320 | rtn_val = -2; |
j3 | 0:798fb343e022 | 321 | } |
j3 | 0:798fb343e022 | 322 | else |
j3 | 0:798fb343e022 | 323 | { |
j3 | 0:798fb343e022 | 324 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 325 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 326 | { |
j3 | 0:798fb343e022 | 327 | if(device_number == idx) |
j3 | 0:798fb343e022 | 328 | { |
j3 | 0:798fb343e022 | 329 | _p_spi->write(MAX7219_SHUTDOWN); |
j3 | 0:798fb343e022 | 330 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 331 | } |
j3 | 0:798fb343e022 | 332 | else |
j3 | 0:798fb343e022 | 333 | { |
j3 | 0:798fb343e022 | 334 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 335 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 336 | } |
j3 | 0:798fb343e022 | 337 | } |
j3 | 0:798fb343e022 | 338 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 339 | |
j3 | 0:798fb343e022 | 340 | rtn_val = 0; |
j3 | 0:798fb343e022 | 341 | } |
j3 | 0:798fb343e022 | 342 | |
j3 | 0:798fb343e022 | 343 | return(rtn_val); |
j3 | 0:798fb343e022 | 344 | } |
j3 | 0:798fb343e022 | 345 | |
j3 | 0:798fb343e022 | 346 | |
j3 | 0:798fb343e022 | 347 | //********************************************************************* |
j3 | 0:798fb343e022 | 348 | int32_t Max7219::write_digit(uint8_t device_number, uint8_t digit, uint8_t data) |
j3 | 0:798fb343e022 | 349 | { |
j3 | 0:798fb343e022 | 350 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 351 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 352 | |
j3 | 0:798fb343e022 | 353 | if(digit > MAX7219_DIGIT_7) |
j3 | 0:798fb343e022 | 354 | { |
j3 | 0:798fb343e022 | 355 | rtn_val = -3; |
j3 | 0:798fb343e022 | 356 | } |
j3 | 0:798fb343e022 | 357 | else if(digit < MAX7219_DIGIT_0) |
j3 | 0:798fb343e022 | 358 | { |
j3 | 0:798fb343e022 | 359 | rtn_val = -4; |
j3 | 0:798fb343e022 | 360 | } |
j3 | 0:798fb343e022 | 361 | else |
j3 | 0:798fb343e022 | 362 | { |
j3 | 0:798fb343e022 | 363 | if(device_number > _num_devices) |
j3 | 0:798fb343e022 | 364 | { |
j3 | 0:798fb343e022 | 365 | rtn_val = -1; |
j3 | 0:798fb343e022 | 366 | } |
j3 | 0:798fb343e022 | 367 | else if(device_number == 0) |
j3 | 0:798fb343e022 | 368 | { |
j3 | 0:798fb343e022 | 369 | rtn_val = -2; |
j3 | 0:798fb343e022 | 370 | } |
j3 | 0:798fb343e022 | 371 | else |
j3 | 0:798fb343e022 | 372 | { |
j3 | 0:798fb343e022 | 373 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 374 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 375 | { |
j3 | 0:798fb343e022 | 376 | if(idx == device_number) |
j3 | 0:798fb343e022 | 377 | { |
j3 | 0:798fb343e022 | 378 | _p_spi->write(digit); |
j3 | 0:798fb343e022 | 379 | _p_spi->write(data); |
j3 | 0:798fb343e022 | 380 | } |
j3 | 0:798fb343e022 | 381 | else |
j3 | 0:798fb343e022 | 382 | { |
j3 | 0:798fb343e022 | 383 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 384 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 385 | } |
j3 | 0:798fb343e022 | 386 | } |
j3 | 0:798fb343e022 | 387 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 388 | |
j3 | 0:798fb343e022 | 389 | rtn_val = 0; |
j3 | 0:798fb343e022 | 390 | } |
j3 | 0:798fb343e022 | 391 | } |
j3 | 0:798fb343e022 | 392 | |
j3 | 0:798fb343e022 | 393 | return(rtn_val); |
j3 | 0:798fb343e022 | 394 | } |
j3 | 0:798fb343e022 | 395 | |
j3 | 0:798fb343e022 | 396 | |
j3 | 0:798fb343e022 | 397 | //********************************************************************* |
j3 | 0:798fb343e022 | 398 | int32_t Max7219::clear_digit(uint8_t device_number, uint8_t digit) |
j3 | 0:798fb343e022 | 399 | { |
j3 | 0:798fb343e022 | 400 | int32_t rtn_val = -1; |
j3 | 0:798fb343e022 | 401 | uint8_t idx = 0; |
j3 | 0:798fb343e022 | 402 | |
j3 | 0:798fb343e022 | 403 | if(digit > MAX7219_DIGIT_7) |
j3 | 0:798fb343e022 | 404 | { |
j3 | 0:798fb343e022 | 405 | rtn_val = -3; |
j3 | 0:798fb343e022 | 406 | } |
j3 | 0:798fb343e022 | 407 | else if(digit < MAX7219_DIGIT_0) |
j3 | 0:798fb343e022 | 408 | { |
j3 | 0:798fb343e022 | 409 | rtn_val = -4; |
j3 | 0:798fb343e022 | 410 | } |
j3 | 0:798fb343e022 | 411 | else |
j3 | 0:798fb343e022 | 412 | { |
j3 | 0:798fb343e022 | 413 | if(device_number > _num_devices) |
j3 | 0:798fb343e022 | 414 | { |
j3 | 0:798fb343e022 | 415 | rtn_val = -1; |
j3 | 0:798fb343e022 | 416 | } |
j3 | 0:798fb343e022 | 417 | else if(device_number == 0) |
j3 | 0:798fb343e022 | 418 | { |
j3 | 0:798fb343e022 | 419 | rtn_val = -2; |
j3 | 0:798fb343e022 | 420 | } |
j3 | 0:798fb343e022 | 421 | else |
j3 | 0:798fb343e022 | 422 | { |
j3 | 0:798fb343e022 | 423 | _p_cs->write(0); |
j3 | 0:798fb343e022 | 424 | for(idx = _num_devices; idx > 0; idx--) |
j3 | 0:798fb343e022 | 425 | { |
j3 | 0:798fb343e022 | 426 | if(idx == device_number) |
j3 | 0:798fb343e022 | 427 | { |
j3 | 0:798fb343e022 | 428 | _p_spi->write(digit); |
j3 | 0:798fb343e022 | 429 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 430 | } |
j3 | 0:798fb343e022 | 431 | else |
j3 | 0:798fb343e022 | 432 | { |
j3 | 0:798fb343e022 | 433 | _p_spi->write(MAX7219_NO_OP); |
j3 | 0:798fb343e022 | 434 | _p_spi->write(0); |
j3 | 0:798fb343e022 | 435 | } |
j3 | 0:798fb343e022 | 436 | } |
j3 | 0:798fb343e022 | 437 | _p_cs->write(1); |
j3 | 0:798fb343e022 | 438 | |
j3 | 0:798fb343e022 | 439 | rtn_val = 0; |
j3 | 0:798fb343e022 | 440 | } |
j3 | 0:798fb343e022 | 441 | } |
j3 | 0:798fb343e022 | 442 | |
j3 | 0:798fb343e022 | 443 | return(rtn_val); |
j3 | 0:798fb343e022 | 444 | } |
j3 | 0:798fb343e022 | 445 |