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buf.cpp
Package: se06.rar　[view]
Upload User: kepeng103
Upload Date: 2022-07-27
Package Size: 2653k
Code Size: 1k
Category:

DSP program

Development Platform:

C/C++

buf.cpp：Code Content
  1. #include "..commonhal.h"
  2. #include "buf.h"
  3. #include <stdio.h>
  6. int16 in[2][FRAME_LENGTH];
  7. int16 out[2][FRAME_LENGTH];
  8. volatile int i,j;
  9. volatile int m,n;
  10. int last_read = 0;
  11. int last_write = 0;
  13. void buf_init(void)
  14. {
  15. i = 0;
  16. j = 0;
  17. m = 0;
  18. n = 0;
  19. last_read = 0;
  20. last_write = 0;
  21. }
  23. void data_in(int16 data)
  24. {
  25. static int k = 0;
  26. in[i][j] = data;
  28. if(++j == FRAME_LENGTH) {
  29. j = 0;
  30. i ^= 0x1;
  31. if(++k == 4) {
  32. k = 0;
  33. REG32(MCASP1_PDOUT) ^= 0x10;
  34. }
  35. }
  36. }
  38. int16 data_out(void)
  39. {
  40. static int k = 0;
  41. int16 data = out[m][n];
  43. if(++n == FRAME_LENGTH) {
  44. n = 0;
  45. m ^= 0x1;
  46. if(++k == 4) {
  47. k = 0;
  48. REG32(MCASP1_PDOUT) ^= 0x8;
  49. }
  50. }
  52. return data;
  53. }
  55. int16 *read_data(void)
  56. {
  57. int16 *data;
  59. while(last_read == i)
  60. data = in[last_read];
  61. last_read = i;
  62. return data;
  63. }
  65. void write_data(int16 *data)
  66. {
  67. while(last_write == m);
  68. for(int k=0; k<FRAME_LENGTH; k++)
  69. {out[last_write][k] = data[k];}
  70. last_write = m;
  71. }