Simple single-color 8x8x8 LED Cube with AVRs
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audio.c 1.3KB

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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. uint8_t ret[7]; // Buffer for data
  32. // don't free returned memory! It's static mem
  33. uint8_t *getAudioData(void) {
  34. // We read 7 bytes from our Audio µC
  35. uint8_t i;
  36. if (i2c_start(TWIADDRESSAUDIO | I2C_READ) == 0) {
  37. for (i = 0; i < 6; i++) {
  38. ret[i] = i2c_readAck();
  39. }
  40. ret[6] = i2c_readNak();
  41. i2c_stop();
  42. return ret;
  43. } else {
  44. return NULL;
  45. }
  46. }