Simple single-color 8x8x8 LED Cube with AVRs
選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。

audio.c 1.4KB

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  1. /*
  2. * audio.c
  3. *
  4. * Copyright 2011 Thomas Buck <xythobuz@me.com>
  5. * Copyright 2011 Max Nuding <max.nuding@gmail.com>
  6. * Copyright 2011 Felix Bäder <baeder.felix@gmail.com>
  7. *
  8. * This file is part of LED-Cube.
  9. *
  10. * LED-Cube is free software: you can redistribute it and/or modify
  11. * it under the terms of the GNU General Public License as published by
  12. * the Free Software Foundation, either version 3 of the License, or
  13. * (at your option) any later version.
  14. *
  15. * LED-Cube is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with LED-Cube. If not, see <http://www.gnu.org/licenses/>.
  22. */
  23. #include <avr/io.h>
  24. #include <stdint.h>
  25. #include <stdlib.h>
  26. #include "twi.h"
  27. #include "audio.h"
  28. #ifdef DEBUG
  29. #include "serial.h"
  30. #endif
  31. // free returned memory!
  32. uint8_t *getAudioData(void) {
  33. // We read 7 bytes from our Audio µC
  34. uint8_t i;
  35. uint8_t *ret = (uint8_t *)malloc(7);
  36. if (ret == NULL) {
  37. // Ran out of memory...
  38. #ifdef DEBUG
  39. serialWriteString("getAudioData: No memory!\n");
  40. #endif
  41. return NULL;
  42. }
  43. if (i2c_start(TWIADDRESSAUDIO | I2C_READ) == 0) {
  44. for (i = 0; i < 6; i++) {
  45. ret[i] = i2c_readAck();
  46. }
  47. ret[6] = i2c_readNak();
  48. i2c_stop();
  49. return ret;
  50. } else {
  51. free(ret);
  52. return NULL;
  53. }
  54. }