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File List  |  1994-04-02  |  3.0 KB  |  133 lines
  1. Motorola DSP56000 Assembler  Version 3.1  94-04-01  20:57:17  tst3.asm  Page 1
  2.  
  3.  
  4.  
  5. 1                        ; generate FSK modulated sinewave on the left channel
  6. 2      
  7. 214    
  8. 215    
  9. 216       000020         buflen    equ     32
  10. 217       0007D0         f         equ     2000
  11. 218       003E80         fs        equ     16000
  12. 219    
  13. 220                      ; two integrator sinewave generator
  14. 221                      sg        macro   store
  15. 222  m                             move    x:store,a
  16. 223  m                             move    x:store+1,b
  17. 224  m 
  18. 225  m                             move    b,y0
  19. 226  m                             mac     x0,y0,a
  20. 227  m                             move    a,y0
  21. 228  m                             mac     -x0,y0,b
  22. 229  m 
  23. 230  m                             move    a,x:store
  24. 231  m                             move    b,x:store+1
  25. 232  m                             endm
  26. 233    
  27. 234    
  28. 235       P:0040                   org     p:user_code
  29. 236    
  30. 237       P:0040 67F400            move              #buffer+2,r7
  31.                  000082
  32. 238       P:0042 057FA7            move              #buflen*4-1,m7
  33. 239    
  34. 240       P:0043 62F400            move              #buffer,r2
  35.                  000080
  36. 241       P:0045 3A0400            move              #4,n2
  37. 242       P:0046 057FA2            move              #buflen*4-1,m2
  38. 243    
  39. 244                                ctrlcd  1,r2,buflen,LINEI,0.0,0.0,LINEO|HEADP
  40. ,0.0,0.0
  41. 265       P:0052 205A00            move              (r2)+
  42. 266                                opencd  fs/1000
  43. 295    
  44. 296                      ; wait for one sample
  45. 297                      loop      waitblk r2,buflen,1
  46. 315    
  47. 316                      ; then generate the sinewave
  48. 317       P:0064 44F400            move              #6.2832*500.0/fs,x0
  49.                  1921FF
  50. 318                                sg      sg1
  51. 329       P:0072 44F400            move              #6.2832*f/fs,x0
  52.                  6487FD
  53. 330       P:0074 200048            add     x0,b
  54. 331       P:0075 21E400            move              b,x0
  55. 332                                sg      sg2
  56. 343    
  57. 344                      ; and output the generated sample
  58. 345       P:0082 5F4A00            move                          b,y:(r2)+n2
  59. 346    
  60. 347    
  61. 348       P:0083 0C0056            jmp     <loop
  62. 349    
  63. 350    
  64. 351       X:0018                   org     x:user_data
  65. 352    
  66. 353       X:0018         sg1       dc      0.04,0.04
  67. Motorola DSP56000 Assembler  Version 3.1  94-04-01  20:57:17  tst3.asm  Page 2
  68.  
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  71. 354       X:001A         sg2       dc      0.2,0.2
  72. 355    
  73. 356       X:0080         buffer    dsm     buflen*4
  74. 357    
  75. 358    
  76. 359       Y:0018                   org     y:user_data
  77. 360    
  78. 361       Y:0080                   dsm     buflen*4
  79. 362    
  80. 363    
  81. 364                                end
  82.  
  83. 0    Errors
  84. 0    Warnings
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