📄 ffts.asm
字号:
**************************************
*基2，时域抽取法，实时实信号的FFT程序*
**************************************
.mmregs
.global reset,start,sav_sin,sav_idx,sav_grp
.def start,_c_int00
N .set 128
LOGN .set 7
DLEVEL .set 100H
AK_SPCR11 .set 0000000000100001b
AK_SPCR21 .set 0000001011000001b
AK_RCR11 .set 0000000001000000b
AK_RCR21 .set 0000000001000000b
AK_XCR11 .set 0000000001000000b
AK_XCR21 .set 0000000001000000b
AK_SRGR11 .set 0000000000010011b
AK_SRGR21 .set 0011000000011111b
; ;
AK_PCR1 .set 0000101000000000b
SPSA1 .set 48h
McBSP1 .set 49h
DXR11 .set 43h
DXR21 .set 42h
DRR11 .set 41h
DRR21 .set 40h
TMP .set 6Ah
DXNEW .set 65h ;暂存输入信号的位置
SPCR11 .set 00h
SPCR21 .set 01h
RCR11 .set 02h
RCR21 .set 03h
XCR11 .set 04h
XCR21 .set 05h
PCR1 .set 0Eh
SRGR11 .set 06h
SRGR21 .set 07h
DATA .usect "DATA",1024 ;存放输入信号频谱的数据存储器块
sav_grp .usect "tempv",3
sav_sin .set sav_grp+1
sav_idx .set sav_grp+2
TEMP .usect "TEMP", 3
flag .usect "vars",1
BOS .usect "stack",0Fh
TOS .usect "stack",1
INPUT .usect "INPUT" ,256
TWI1: .sect "twiddle1" ;正弦表
.int 0,201,402,603
.int 804,1005,1206,1407
.int 1607,1808,2009,2210
.int 2410,2611,2811,3011
.int 3211,3411,3611,3811
.int 4011,4210,4409,4609
.int 4808,5006,5205,5403
.int 5602,5800,5997,6195
.int 6392,6589,6786,6983
.int 7179,7375,7571,7766
.int 7961,8156,8351,8545
.int 8739,8933,9126,9319
.int 9512,9704,9896,10087
.int 10278,10469,10659,10849
.int 11039,11228,11416,11605
.int 11793,11980,12167,12353
.int 12539,12725,12910,13094
.int 13278,13462,13645,13828
.int 14010,14191,14372,14552
.int 14732,14912,15090,15269
.int 15446,15623,15800,15976
.int 16151,16325,16499,16673
.int 16846,17018,17189,17360
.int 17530,17700,17869,18037
.int 18204,18371,18537,18703
.int 18868,19032,19195,19358
.int 19519,19681,19841,20001
.int 20159,20318,20475,20631
.int 20787,20942,21097,21250
.int 21403,21555,21706,21856
.int 22005,22154,22301,22448
.int 22594,22740,22884,23027
.int 23170,23312,23453,23593
.int 23732,23870,24007,24144
.int 24279,24414,24547,24680
.int 24812,24943,25073,25201
.int 25330,25457,25583,25708
.int 25832,25955,26077,26199
.int 26319,26438,26557,26674
.int 26790,26905,27020,27133
.int 27245,27356,27466,27576
.int 27684,27791,27897,28002
.int 28106,28208,28310,28411
.int 28511,28609,28707,28803
.int 28898,28993,29086,29178
.int 29269,29359,29447,29535
.int 29621,29707,29791,29874
.int 29956,30037,30117,30196
.int 30273,30350,30425,30499
.int 30572,30644,30714,30784
.int 30852,30919,30985,31050
.int 31114,31176,31237,31298
.int 31357,31414,31471,31526
.int 31581,31634,31685,31736
.int 31785,31834,31881,31927
.int 31971,32015,32057,32098
.int 32138,32176,32214,32250
.int 32285,32319,32351,32383
.int 32413,32442,32469,32496
.int 32521,32545,32568,32589
.int 32610,32629,32647,32663
.int 32679,32693,32706,32718
.int 32728,32737,32745,32752
.int 32758,32762,32765,32767
.int 32767,32767,32765,32762
.int 32758,32752,32745,32737
.int 32728,32718,32706,32693
.int 32679,32663,32647,32629
.int 32610,32589,32568,32545
.int 32521,32496,32469,32442
.int 32413,32383,32351,32319
.int 32285,32250,32214,32176
.int 32138,32098,32057,32015
.int 31971,31927,31881,31834
.int 31785,31736,31685,31634
.int 31581,31526,31471,31414
.int 31357,31298,31237,31176
.int 31114,31050,30985,30919
.int 30852,30784,30714,30644
.int 30572,30499,30425,30350
.int 30273,30196,30117,30037
.int 29956,29874,29791,29707
.int 29621,29535,29447,29359
.int 29269,29178,29086,28993
.int 28898,28803,28707,28609
.int 28511,28411,28310,28208
.int 28106,28002,27897,27791
.int 27684,27576,27466,27356
.int 27245,27133,27020,26905
.int 26790,26674,26557,26438
.int 26319,26199,26077,25955
.int 25832,25708,25583,25457
.int 25330,25201,25073,24943
.int 24812,24680,24547,24414
.int 24279,24144,24007,23870
.int 23732,23593,23453,23312
.int 23170,23027,22884,22740
.int 22594,22448,22301,22154
.int 22005,21856,21706,21555
.int 21403,21250,21097,20942
.int 20787,20631,20475,20318
.int 20159,20001,19841,19681
.int 19519,19358,19195,19032
.int 18868,18703,18537,18371
.int 18204,18037,17869,17700
.int 17530,17360,17189,17018
.int 16846,16673,16499,16325
.int 16151,15976,15800,15623
.int 15446,15269,15090,14912
.int 14732,14552,14372,14191
.int 14010,13828,13645,13462
.int 13278,13094,12910,12725
.int 12539,12353,12167,11980
.int 11793,11605,11416,11228
.int 11039,10849,10659,10469
.int 10278,10087,9896,9704
.int 9512,9319,9126,8933
.int 8739,8545,8351,8156
.int 7961,7766,7571,7375
.int 7179,6983,6786,6589
.int 6392,6195,5997,5800
.int 5602,5403,5205,5006
.int 4808,4609,4409,4210
.int 4011,3811,3611,3411
.int 3211,3011,2811,2611
.int 2410,2210,2009,1808
.int 1607,1407,1206,1005
.int 804,603,402,201
TWI2: .sect "twiddle2" ;余弦表
.int 32767,32767,32765,32762
.int 32758,32752,32745,32737
.int 32728,32718,32706,32693
.int 32679,32663,32647,32629
.int 32610,32589,32568,32545
.int 32521,32496,32469,32442
.int 32413,32383,32351,32319
.int 32285,32250,32214,32176
.int 32138,32098,32057,32015
.int 31971,31927,31881,31834
.int 31785,31736,31685,31634
.int 31581,31526,31471,31414
.int 31357,31298,31237,31176
.int 31114,31050,30985,30919
.int 30852,30784,30714,30644
.int 30572,30499,30425,30350
.int 30273,30196,30117,30037
.int 29956,29874,29791,29707
.int 29621,29535,29447,29359
.int 29269,29178,29086,28993
.int 28898,28803,28707,28609
.int 28511,28411,28310,28208
.int 28106,28002,27897,27791
.int 27684,27576,27466,27356
.int 27245,27133,27020,26905
.int 26790,26674,26557,26438
.int 26319,26199,26077,25955
.int 25832,25708,25583,25457
.int 25330,25201,25073,24943
.int 24812,24680,24547,24414
.int 24279,24144,24007,23870
.int 23732,23593,23453,23312
.int 23170,23027,22884,22740
.int 22594,22448,22301,22154
.int 22005,21856,21706,21555
.int 21403,21250,21097,20942
.int 20787,20631,20475,20318
.int 20159,20001,19841,19681
.int 19519,19358,19195,19032
.int 18868,18703,18537,18371
.int 18204,18037,17869,17700
.int 17530,17360,17189,17018
.int 16846,16673,16499,16325
.int 16151,15976,15800,15623
.int 15446,15269,15090,14912
.int 14732,14552,14372,14191
.int 14010,13828,13645,13462
.int 13278,13094,12910,12725
.int 12539,12353,12167,11980
.int 11793,11605,11416,11228
.int 11039,10849,10659,10469
.int 10278,10087,9896,9704
.int 9512,9319,9126,8933
.int 8739,8545,8351,8156
.int 7961,7766,7571,7375
.int 7179,6983,6786,6589
.int 6392,6195,5997,5800
.int 5602,5403,5205,5006
.int 4808,4609,4409,4210
.int 4011,3811,3611,3411
.int 3211,3011,2811,2611
.int 2410,2210,2009,1808
.int 1607,1407,1206,1005
.int 804,603,402,201
.int 0,201,-402,-603
.int -804,-1005,-1206,-1407
.int -1607,-1808,-2009,-2210
.int -2410,-2611,-2811,-3011
.int -3211,-3411,-3611,-3811
.int -4011,-4210,-4409,-4609
.int -4808,-5006,-5205,-5403
.int -5602,-5800,-5997,-6195
.int -6392,-6589,-6786,-6983
.int -7179,-7375,-7571,-7766
.int -7961,-8156,-8351,-8545
.int -8739,-8933,-9126,-9319
.int -9512,-9704,-9896,-10087
.int -10278,-10469,-10659,-10849
.int -11039,-11228,-11416,-11605
.int -11793,-11980,-12167,-12353
.int -12539,-12725,-12910,-13094
.int -13278,-13462,-13645,-13828
.int -14010,-14191,-14372,-14552
.int -14732,-14912,-15090,-15269
.int -15446,-15623,-15800,-15976
.int -16151,-16325,-16499,-16673
.int -16846,-17018,-17189,-17360
.int -17530,-17700,-17869,-18037
.int -18204,-18371,-18537,-18703
.int -18868,-19032,-19195,-19358
.int -19519,-19681,-19841,-20001
.int -20159,-20318,-20475,-20631
.int -20787,-20942,-21097,-21250
.int -21403,-21555,-21706,-21856
.int -22005,-22154,-22301,-22448
.int -22594,-22740,-22884,-23027
.int -23170,-23312,-23453,-23593
.int -23732,-23870,-24007,-24144
.int -24279,-24414,-24547,-24680
.int -24812,-24943,-25073,-25201
.int -25330,-25457,-25583,-25708
.int -25832,-25955,-26077,-26199
.int -26319,-26438,-26557,-26674
.int -26790,-26905,-27020,-27133
.int -27245,-27356,-27466,-27576
.int -27684,-27791,-27897,-28002
.int -28106,-28208,-28310,-28411
.int -28511,-28609,-28707,-28803
.int -28898,-28993,-29086,-29178
.int -29269,-29359,-29447,-29535
.int -29621,-29707,-29791,-29874
.int -29956,-30037,-30117,-30196
.int -30273,-30350,-30425,-30499
.int -30572,-30644,-30714,-30784
.int -30852,-30919,-30985,-31050
.int -31114,-31176,-31237,-31298
.int -31357,-31414,-31471,-31526
.int -31581,-31634,-31685,-31736
.int -31785,-31834,-31881,-31927
.int -31971,-32015,-32057,-32098
.int -32138,-32176,-32214,-32250
.int -32285,-32319,-32351,-32383
.int -32413,-32442,-32469,-32496
.int -32521,-32545,-32568,-32589
.int -32610,-32629,-32647,-32663
.int -32679,-32693,-32706,-32718
.int -32728,-32737,-32745,-32752
.int -32758,-32762,-32765,-32767
.text
_c_int00
b start
nop
nop
NMI rete
nop
nop
nop
SINT17 .space 4*16
SINT18 .space 4*16
SINT19 .space 4*16
SINT20 .space 4*16
SINT21 .space 4*16
SINT22 .space 4*16
SINT23 .space 4*16
SINT24 .space 4*16
SINT25 .space 4*16
SINT26 .space 4*16
SINT27 .space 4*16
SINT28 .space 4*16
SINT29 .space 4*16
SINT30 .space 4*16
INT0 rsbx intm
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