├── README.md ├── handlefile.h ├── MP3PlayerM5Cardputer.ino └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | # MP3PlayerForM5Cardputer 2 | 3 | Version 1.0 4 | How to use: 5 | Copy '.mp3' files into sd card and pulg into Cardputer press the 'BtnGo' to play 6 | for next song press 'BtnGo' 7 | To vhange the volume press arrow up(;) and down(.) 8 | Version 1.1 Updates: 9 | * directory scan option 10 | * n for next and b for previous song 11 | * p for play and pause 12 | * g to toggle graphics 13 | it is still in process so can have bugs 14 | Please report any bug on github and feel free to provide sugesstions 15 | 16 | Depedencies: 17 | * M5GFX: https://github.com/m5stack/M5GFX 18 | * M5Unified: https://github.com/m5stack/M5Unified 19 | * ESP8266Audio: https://github.com/earlephilhower/ESP8266Audio/ 20 | * M5Cardputer: https://github.com/m5stack/M5Cardputer 21 | -------------------------------------------------------------------------------- /handlefile.h: -------------------------------------------------------------------------------- 1 | #include 2 | String files[2000] = 3 | { 4 | }; 5 | int no_of_files = 0; 6 | bool stop_scan = false; 7 | void listDir(fs::FS &fs, const char *dirname, uint8_t levels) { 8 | // printf_log("Listing directory: %s\n", dirname); 9 | if(stop_scan){ 10 | return; 11 | } 12 | File root = fs.open(dirname); 13 | if (!root) { 14 | // println_log("Failed to open directory"); 15 | return; 16 | } 17 | if (!root.isDirectory()) { 18 | // println_log("Not a directory"); 19 | return; 20 | } 21 | 22 | File file = root.openNextFile(); 23 | while (file) { 24 | 25 | bool scan = false; 26 | 27 | if (file.isDirectory()) { 28 | // Serial.print(" DIR : "); 29 | // println_log(file.name()); 30 | M5Cardputer.update(); 31 | M5Cardputer.Display.drawString("Do you want to scan(Y/N/C)", 32 | 1, 33 | M5Cardputer.Display.height() / 2); 34 | String filename = file.name(); 35 | M5Cardputer.Display.drawString(filename, 36 | 1, 37 | (M5Cardputer.Display.height()+20) / 2); 38 | while(1){ 39 | M5Cardputer.update(); 40 | if(M5Cardputer.Keyboard.isChange()) break; 41 | } 42 | 43 | 44 | if(M5Cardputer.Keyboard.isKeyPressed('y')){ 45 | scan = true; 46 | } 47 | if(M5Cardputer.Keyboard.isKeyPressed('n')){ 48 | scan = false; 49 | } 50 | if(M5Cardputer.Keyboard.isKeyPressed('c')){ 51 | stop_scan = true; 52 | return; 53 | } 54 | 55 | 56 | if (levels && scan) { 57 | listDir(fs, file.path(), levels - 1); 58 | } 59 | } else { 60 | String filename = file.name(); 61 | String filepath = file.path(); 62 | if (filename.lastIndexOf(".mp3") > 0 && filepath.length()<256) 63 | if(filepath != "") 64 | {files[no_of_files++] = filepath; 65 | M5Cardputer.Display.drawString("Current File:", 66 | 1, 67 | M5Cardputer.Display.height()+40 / 2); 68 | String filename = file.name(); 69 | M5Cardputer.Display.drawString(filename, 70 | 1, 71 | (M5Cardputer.Display.height()+60) / 2); 72 | } 73 | 74 | // Serial.print(" FILE: "); 75 | // Serial.print(file.name()); 76 | // Serial.print(" SIZE: "); 77 | // println_log(files[no_of_files]); 78 | } 79 | 80 | 81 | if(M5Cardputer.Keyboard.isChange()){ 82 | if(M5Cardputer.Keyboard.isKeyPressed('s')){ 83 | levels = 0; 84 | return; 85 | } 86 | } 87 | 88 | file = root.openNextFile(); 89 | } 90 | } 91 | -------------------------------------------------------------------------------- /MP3PlayerM5Cardputer.ino: -------------------------------------------------------------------------------- 1 | 2 | #include 3 | #include 4 | 5 | /// need ESP8266Audio library. ( URL : https://github.com/earlephilhower/ESP8266Audio/ ) 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include "M5Cardputer.h" 11 | #include 12 | #include 13 | #include "handlefile.h" 14 | 15 | #define SD_SPI_SCK_PIN 40 16 | #define SD_SPI_MISO_PIN 39 17 | #define SD_SPI_MOSI_PIN 14 18 | #define SD_SPI_CS_PIN 12 19 | 20 | /// set M5Speaker virtual channel (0-7) 21 | static constexpr uint8_t m5spk_virtual_channel = 0; 22 | bool isPaused = false; 23 | /// set your mp3 filename 24 | static constexpr const char* filename[] = 25 | { 26 | "/music.mp3" 27 | }; 28 | static constexpr const size_t filecount = sizeof(filename) / sizeof(filename[0]); 29 | String filetoplay; 30 | char f[256]; 31 | class AudioOutputM5Speaker : public AudioOutput 32 | { 33 | public: 34 | AudioOutputM5Speaker(m5::Speaker_Class* m5sound, uint8_t virtual_sound_channel = 0) 35 | { 36 | _m5sound = m5sound; 37 | _virtual_ch = virtual_sound_channel; 38 | } 39 | virtual ~AudioOutputM5Speaker(void) {}; 40 | virtual bool begin(void) override { return true; } 41 | virtual bool ConsumeSample(int16_t sample[2]) override 42 | { 43 | if (_tri_buffer_index < tri_buf_size) 44 | { 45 | _tri_buffer[_tri_index][_tri_buffer_index ] = sample[0]; 46 | _tri_buffer[_tri_index][_tri_buffer_index+1] = sample[1]; 47 | _tri_buffer_index += 2; 48 | 49 | return true; 50 | } 51 | 52 | flush(); 53 | return false; 54 | } 55 | virtual void flush(void) override 56 | { 57 | if (_tri_buffer_index) 58 | { 59 | _m5sound->playRaw(_tri_buffer[_tri_index], _tri_buffer_index, hertz, true, 1, _virtual_ch); 60 | _tri_index = _tri_index < 2 ? _tri_index + 1 : 0; 61 | _tri_buffer_index = 0; 62 | } 63 | } 64 | virtual bool stop(void) override 65 | { 66 | flush(); 67 | _m5sound->stop(_virtual_ch); 68 | return true; 69 | } 70 | 71 | const int16_t* getBuffer(void) const { return _tri_buffer[(_tri_index + 2) % 3]; } 72 | const uint32_t getUpdateCount(void) const { return _update_count; } 73 | protected: 74 | m5::Speaker_Class* _m5sound; 75 | uint8_t _virtual_ch; 76 | static constexpr size_t tri_buf_size = 640; 77 | int16_t _tri_buffer[3][tri_buf_size]; 78 | size_t _tri_buffer_index = 0; 79 | size_t _tri_index = 0; 80 | size_t _update_count = 0; 81 | }; 82 | 83 | 84 | #define FFT_SIZE 256 85 | class fft_t 86 | { 87 | float _wr[FFT_SIZE + 1]; 88 | float _wi[FFT_SIZE + 1]; 89 | float _fr[FFT_SIZE + 1]; 90 | float _fi[FFT_SIZE + 1]; 91 | uint16_t _br[FFT_SIZE + 1]; 92 | size_t _ie; 93 | 94 | public: 95 | fft_t(void) 96 | { 97 | #ifndef M_PI 98 | #define M_PI 3.141592653 99 | #endif 100 | _ie = logf( (float)FFT_SIZE ) / log(2.0) + 0.5; 101 | static constexpr float omega = 2.0f * M_PI / FFT_SIZE; 102 | static constexpr int s4 = FFT_SIZE / 4; 103 | static constexpr int s2 = FFT_SIZE / 2; 104 | for ( int i = 1 ; i < s4 ; ++i) 105 | { 106 | float f = cosf(omega * i); 107 | _wi[s4 + i] = f; 108 | _wi[s4 - i] = f; 109 | _wr[ i] = f; 110 | _wr[s2 - i] = -f; 111 | } 112 | _wi[s4] = _wr[0] = 1; 113 | 114 | size_t je = 1; 115 | _br[0] = 0; 116 | _br[1] = FFT_SIZE / 2; 117 | for ( size_t i = 0 ; i < _ie - 1 ; ++i ) 118 | { 119 | _br[ je << 1 ] = _br[ je ] >> 1; 120 | je = je << 1; 121 | for ( size_t j = 1 ; j < je ; ++j ) 122 | { 123 | _br[je + j] = _br[je] + _br[j]; 124 | } 125 | } 126 | } 127 | 128 | void exec(const int16_t* in) 129 | { 130 | memset(_fi, 0, sizeof(_fi)); 131 | for ( size_t j = 0 ; j < FFT_SIZE / 2 ; ++j ) 132 | { 133 | float basej = 0.25 * (1.0-_wr[j]); 134 | size_t r = FFT_SIZE - j - 1; 135 | 136 | /// perform han window and stereo to mono convert. 137 | _fr[_br[j]] = basej * (in[j * 2] + in[j * 2 + 1]); 138 | _fr[_br[r]] = basej * (in[r * 2] + in[r * 2 + 1]); 139 | } 140 | 141 | size_t s = 1; 142 | size_t i = 0; 143 | do 144 | { 145 | size_t ke = s; 146 | s <<= 1; 147 | size_t je = FFT_SIZE / s; 148 | size_t j = 0; 149 | do 150 | { 151 | size_t k = 0; 152 | do 153 | { 154 | size_t l = s * j + k; 155 | size_t m = ke * (2 * j + 1) + k; 156 | size_t p = je * k; 157 | float Wxmr = _fr[m] * _wr[p] + _fi[m] * _wi[p]; 158 | float Wxmi = _fi[m] * _wr[p] - _fr[m] * _wi[p]; 159 | _fr[m] = _fr[l] - Wxmr; 160 | _fi[m] = _fi[l] - Wxmi; 161 | _fr[l] += Wxmr; 162 | _fi[l] += Wxmi; 163 | } while ( ++k < ke) ; 164 | } while ( ++j < je ); 165 | } while ( ++i < _ie ); 166 | } 167 | 168 | uint32_t get(size_t index) 169 | { 170 | return (index < FFT_SIZE / 2) ? (uint32_t)sqrtf(_fr[ index ] * _fr[ index ] + _fi[ index ] * _fi[ index ]) : 0u; 171 | } 172 | }; 173 | // static constexpr const int preallocateBufferSize = 128 * 1024; 174 | // static constexpr const int preallocateCodecSize = 85332; // MP3 and AAC+SBR codec max mem needed 175 | // static void* preallocateBuffer = nullptr; 176 | // static void* preallocateCodec = nullptr; 177 | static constexpr size_t WAVE_SIZE = 320; 178 | static AudioFileSourceSD file; 179 | static AudioOutputM5Speaker out(&M5Cardputer.Speaker, m5spk_virtual_channel); 180 | static AudioGeneratorMP3 mp3; 181 | static AudioFileSourceID3* id3 = nullptr; 182 | static fft_t fft; 183 | static bool fft_enabled = false; 184 | static bool wave_enabled = false; 185 | static uint16_t prev_y[(FFT_SIZE / 2)+1]; 186 | static uint16_t peak_y[(FFT_SIZE / 2)+1]; 187 | static int16_t wave_y[WAVE_SIZE]; 188 | static int16_t wave_h[WAVE_SIZE]; 189 | static int16_t raw_data[WAVE_SIZE * 2]; 190 | static int header_height = 0; 191 | static size_t fileindex = 0; 192 | uint32_t paused_at = 0; 193 | void MDCallback(void *cbData, const char *type, bool isUnicode, const char *string) 194 | { 195 | (void)cbData; 196 | if (string[0] == 0) { return; } 197 | if (strcmp(type, "eof") == 0) 198 | { 199 | M5Cardputer.Display.display(); 200 | return; 201 | } 202 | int y = M5Cardputer.Display.getCursorY(); 203 | if (y+1 >= header_height) { return; } 204 | M5Cardputer.Display.fillRect(0, y, M5Cardputer.Display.width(), 12, M5Cardputer.Display.getBaseColor()); 205 | M5Cardputer.Display.printf("%s: %s", type, string); 206 | M5Cardputer.Display.setCursor(0, y+12); 207 | } 208 | 209 | void stop(void) 210 | { 211 | if (id3 == nullptr) return; 212 | out.stop(); 213 | mp3.stop(); 214 | id3->RegisterMetadataCB(nullptr, nullptr); 215 | id3->close(); 216 | file.close(); 217 | delete id3; 218 | id3 = nullptr; 219 | } 220 | 221 | void play(const char* fname) 222 | { 223 | if (id3 != nullptr) { stop(); } 224 | M5Cardputer.Display.setCursor(0, 8); 225 | file.open(fname); 226 | id3 = new AudioFileSourceID3(&file); 227 | id3->RegisterMetadataCB(MDCallback, (void*)"ID3TAG"); 228 | id3->open(fname); 229 | mp3.begin(id3, &out); 230 | } 231 | 232 | void pauseme(void){ 233 | paused_at = id3->getPos(); 234 | mp3.stop(); 235 | isPaused = true; 236 | } 237 | void resume(const char* fname){ 238 | if (id3 != nullptr) { stop(); } 239 | M5Cardputer.Display.setCursor(0, 8); 240 | file.open(fname); 241 | id3 = new AudioFileSourceID3(&file); 242 | id3->RegisterMetadataCB(MDCallback, (void*)"ID3TAG"); 243 | id3->open(fname); 244 | id3->seek( paused_at,1 ); 245 | isPaused = false; 246 | mp3.begin(id3, &out); 247 | } 248 | 249 | uint32_t bgcolor(LGFX_Device* gfx, int y) 250 | { 251 | auto h = gfx->height(); 252 | auto dh = h - header_height; 253 | int v = ((h - y)<<5) / dh; 254 | if (dh > 44) 255 | { 256 | int v2 = ((h - y - 1)<<5) / dh; 257 | if ((v >> 2) != (v2 >> 2)) 258 | { 259 | return 0x666666u; 260 | } 261 | } 262 | return gfx->color888(v + 2, v, v + 6); 263 | } 264 | 265 | void gfxSetup(LGFX_Device* gfx) 266 | { 267 | if (gfx == nullptr) { return; } 268 | // if (gfx->width() < gfx->height()) 269 | // { 270 | gfx->setRotation(1); 271 | // } 272 | gfx->setFont(&fonts::lgfxJapanGothic_12); 273 | gfx->setEpdMode(epd_mode_t::epd_fastest); 274 | gfx->setCursor(0, 8); 275 | gfx->println("MP3 player"); 276 | gfx->setTextWrap(false); 277 | gfx->fillRect(0, 6, gfx->width(), 2, TFT_BLACK); 278 | header_height = (gfx->height() > 100) ? 33 : 21; 279 | fft_enabled = !gfx->isEPD(); 280 | if (fft_enabled) 281 | { 282 | wave_enabled = (gfx->getBoard() != m5gfx::board_M5UnitLCD); 283 | 284 | for (int y = header_height; y < gfx->height(); ++y) 285 | { 286 | gfx->drawFastHLine(0, y, gfx->width(), bgcolor(gfx, y)); 287 | } 288 | } 289 | 290 | for (int x = 0; x < (FFT_SIZE/2)+1; ++x) 291 | { 292 | prev_y[x] = INT16_MAX; 293 | peak_y[x] = INT16_MAX; 294 | } 295 | for (int x = 0; x < WAVE_SIZE; ++x) 296 | { 297 | wave_y[x] = gfx->height(); 298 | wave_h[x] = 0; 299 | } 300 | } 301 | 302 | void gfxLoop(LGFX_Device* gfx) 303 | { 304 | if (gfx == nullptr) { return; } 305 | 306 | if (!gfx->displayBusy()) 307 | { // draw volume bar 308 | static int px; 309 | uint8_t v = M5Cardputer.Speaker.getVolume(); 310 | int x = v * (gfx->width()) >> 8; 311 | if (px != x) 312 | { 313 | gfx->fillRect(x, 6, px - x, 2, px < x ? 0xAAFFAAu : 0u); 314 | gfx->display(); 315 | px = x; 316 | } 317 | } 318 | 319 | if (fft_enabled && !gfx->displayBusy() && M5Cardputer.Speaker.isPlaying(m5spk_virtual_channel) > 1) 320 | { 321 | static int prev_x[2]; 322 | static int peak_x[2]; 323 | 324 | auto buf = out.getBuffer(); 325 | if (buf) 326 | { 327 | memcpy(raw_data, buf, WAVE_SIZE * 2 * sizeof(int16_t)); // stereo data copy 328 | gfx->startWrite(); 329 | 330 | // draw stereo level meter 331 | for (size_t i = 0; i < 2; ++i) 332 | { 333 | int32_t level = 0; 334 | for (size_t j = i; j < 640; j += 32) 335 | { 336 | uint32_t lv = abs(raw_data[j]); 337 | if (level < lv) { level = lv; } 338 | } 339 | 340 | int32_t x = (level * gfx->width()) / INT16_MAX; 341 | int32_t px = prev_x[i]; 342 | if (px != x) 343 | { 344 | gfx->fillRect(x, i * 3, px - x, 2, px < x ? 0xFF9900u : 0x330000u); 345 | prev_x[i] = x; 346 | } 347 | px = peak_x[i]; 348 | if (px > x) 349 | { 350 | gfx->writeFastVLine(px, i * 3, 2, TFT_BLACK); 351 | px--; 352 | } 353 | else 354 | { 355 | px = x; 356 | } 357 | if (peak_x[i] != px) 358 | { 359 | peak_x[i] = px; 360 | gfx->writeFastVLine(px, i * 3, 2, TFT_WHITE); 361 | } 362 | } 363 | gfx->display(); 364 | 365 | // draw FFT level meter 366 | fft.exec(raw_data); 367 | size_t bw = gfx->width() / 60; 368 | if (bw < 3) { bw = 3; } 369 | int32_t dsp_height = gfx->height(); 370 | int32_t fft_height = dsp_height - header_height - 1; 371 | size_t xe = gfx->width() / bw; 372 | if (xe > (FFT_SIZE/2)) { xe = (FFT_SIZE/2); } 373 | int32_t wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[0] + raw_data[1])) * fft_height) >> 17); 374 | 375 | uint32_t bar_color[2] = { 0x000033u, 0x99AAFFu }; 376 | 377 | for (size_t bx = 0; bx <= xe; ++bx) 378 | { 379 | size_t x = bx * bw; 380 | if ((x & 7) == 0) { gfx->display(); taskYIELD(); } 381 | int32_t f = fft.get(bx); 382 | int32_t y = (f * fft_height) >> 18; 383 | if (y > fft_height) { y = fft_height; } 384 | y = dsp_height - y; 385 | int32_t py = prev_y[bx]; 386 | if (y != py) 387 | { 388 | gfx->fillRect(x, y, bw - 1, py - y, bar_color[(y < py)]); 389 | prev_y[bx] = y; 390 | } 391 | py = peak_y[bx] + 1; 392 | if (py < y) 393 | { 394 | gfx->writeFastHLine(x, py - 1, bw - 1, bgcolor(gfx, py - 1)); 395 | } 396 | else 397 | { 398 | py = y - 1; 399 | } 400 | if (peak_y[bx] != py) 401 | { 402 | peak_y[bx] = py; 403 | gfx->writeFastHLine(x, py, bw - 1, TFT_WHITE); 404 | } 405 | 406 | 407 | if (wave_enabled) 408 | { 409 | for (size_t bi = 0; bi < bw; ++bi) 410 | { 411 | size_t i = x + bi; 412 | if (i >= gfx->width() || i >= WAVE_SIZE) { break; } 413 | y = wave_y[i]; 414 | int32_t h = wave_h[i]; 415 | bool use_bg = (bi+1 == bw); 416 | if (h>0) 417 | { /// erase previous wave. 418 | gfx->setAddrWindow(i, y, 1, h); 419 | h += y; 420 | do 421 | { 422 | uint32_t bg = (use_bg || y < peak_y[bx]) ? bgcolor(gfx, y) 423 | : (y == peak_y[bx]) ? 0xFFFFFFu 424 | : bar_color[(y >= prev_y[bx])]; 425 | gfx->writeColor(bg, 1); 426 | } while (++y < h); 427 | } 428 | size_t i2 = i << 1; 429 | int32_t y1 = wave_next; 430 | wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[i2] + raw_data[i2 + 1])) * fft_height) >> 17); 431 | int32_t y2 = wave_next; 432 | if (y1 > y2) 433 | { 434 | int32_t tmp = y1; 435 | y1 = y2; 436 | y2 = tmp; 437 | } 438 | y = y1; 439 | h = y2 + 1 - y; 440 | wave_y[i] = y; 441 | wave_h[i] = h; 442 | if (h>0) 443 | { /// draw new wave. 444 | gfx->setAddrWindow(i, y, 1, h); 445 | h += y; 446 | do 447 | { 448 | uint32_t bg = (y < prev_y[bx]) ? 0xFFCC33u : 0xFFFFFFu; 449 | gfx->writeColor(bg, 1); 450 | } while (++y < h); 451 | } 452 | } 453 | } 454 | } 455 | gfx->display(); 456 | gfx->endWrite(); 457 | } 458 | } 459 | } 460 | 461 | void setup(void) 462 | { 463 | auto cfg = M5.config(); 464 | 465 | // If you want to play sound from ModuleDisplay, write this 466 | // cfg.external_speaker.module_display = true; 467 | 468 | // If you want to play sound from ModuleRCA, write this 469 | // cfg.external_speaker.module_rca = true; 470 | 471 | // If you want to play sound from HAT Speaker, write this 472 | cfg.external_speaker.hat_spk = true; 473 | 474 | // If you want to play sound from HAT Speaker2, write this 475 | // cfg.external_speaker.hat_spk2 = true; 476 | 477 | // If you want to play sound from ATOMIC Speaker, write this 478 | // cfg.external_speaker.atomic_spk = true; 479 | 480 | M5Cardputer.begin(cfg); 481 | 482 | 483 | { /// custom setting 484 | auto spk_cfg = M5Cardputer.Speaker.config(); 485 | /// Increasing the sample_rate will improve the sound quality instead of increasing the CPU load. 486 | spk_cfg.sample_rate = 128000; // default:64000 (64kHz) e.g. 48000 , 50000 , 80000 , 96000 , 100000 , 128000 , 144000 , 192000 , 200000 487 | spk_cfg.task_pinned_core = APP_CPU_NUM; 488 | M5Cardputer.Speaker.config(spk_cfg); 489 | } 490 | gfxSetup(&M5Cardputer.Display); 491 | 492 | SPI.begin(SD_SPI_SCK_PIN, SD_SPI_MISO_PIN, SD_SPI_MOSI_PIN, SD_SPI_CS_PIN); 493 | 494 | if (!SD.begin(SD_SPI_CS_PIN, SPI, 25000000)) { 495 | // Print a message if the SD card initialization 496 | // fails orif the SD card does not exist. 497 | M5Cardputer.Display.drawString("SD Not Found", 498 | M5Cardputer.Display.width() / 2, 499 | M5Cardputer.Display.height() / 2); 500 | while (1); 501 | } 502 | listDir(SD, "/", 2); 503 | fileindex = 0; 504 | } 505 | bool enableGraphic = false; 506 | void loop(void) 507 | { if(enableGraphic) 508 | gfxLoop(&M5Cardputer.Display); 509 | 510 | if (mp3.isRunning()) 511 | { 512 | if (!mp3.loop()) { mp3.stop(); } 513 | } 514 | else 515 | { 516 | delay(1); 517 | } 518 | 519 | M5Cardputer.update(); 520 | if (M5Cardputer.BtnA.wasClicked()) 521 | { 522 | M5Cardputer.Speaker.tone(1000, 100); 523 | stop(); 524 | if (++fileindex >= no_of_files) { fileindex = 0; } 525 | 526 | filetoplay = files[fileindex]; 527 | filetoplay.toCharArray(f,256); 528 | play(f); 529 | } 530 | 531 | if (M5Cardputer.Keyboard.isChange()) 532 | { 533 | 534 | size_t v = M5Cardputer.Speaker.getVolume(); 535 | if (M5Cardputer.Keyboard.isKeyPressed( 'p')){ 536 | if(isPaused){ 537 | 538 | filetoplay = files[fileindex]; 539 | filetoplay.toCharArray(f,256); 540 | stop(); 541 | resume(f); 542 | } 543 | else{ 544 | pauseme(); 545 | } 546 | } 547 | if (M5Cardputer.Keyboard.isKeyPressed( 'n')){ 548 | if (++fileindex >= no_of_files) { fileindex = 0; } 549 | filetoplay = files[fileindex]; 550 | filetoplay.toCharArray(f,256); 551 | play(f); 552 | } 553 | if (M5Cardputer.Keyboard.isKeyPressed( 'b')){ 554 | if (--fileindex < 0) { fileindex = no_of_files; } 555 | filetoplay = files[fileindex]; 556 | filetoplay.toCharArray(f,256); 557 | play(f); 558 | } 559 | if (M5Cardputer.Keyboard.isKeyPressed( 'g')){ 560 | enableGraphic = !(enableGraphic); 561 | } 562 | if (M5Cardputer.Keyboard.isKeyPressed( ';')) 563 | { v+=10; 564 | } else if ( M5Cardputer.Keyboard.isKeyPressed( '.')) { v-=10; } 565 | if (v <= 255 ) 566 | { 567 | 568 | M5Cardputer.Speaker.setVolume(v); 569 | } 570 | } 571 | 572 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------