dsp課程設(shè)計(jì)報(bào)告--fft的dsp實(shí)現(xiàn)(編輯修改稿)
2025-04-19 00:26 本頁面
【文章內(nèi)容簡介】 _LOGN .set 3 PA0 .set 0 .bss d_twid_idx,1 .bss d_data_idx,1 .bss d_grps_t,1 .sect fft_prg********************位碼倒置程序************************** .asg AR2,REORDERED .asg AR3,ORIGINAL_INPUT .asg AR7,DATA_PROC_BUF start: SSBX FRCT STM STACK+10,SP STM sine,AR1 RPT K_TWID_TBL_SIZE1 MVPD sine1,*AR1+ STM cosine,AR1 RPT K_TWID_TBL_SIZE1 MVPD cosine1,*AR1+ STM d_input,ORIGINAL_INPUT STM fft_data,DATA_PROC_BUF MVMM DATA_PROC_BUF,REORDERED STM K_FFT_SIZE1,BRC RPTBD bit_rev_end1 STM K_FFT_SIZE,AR0 MVDD *ORIGINAL_INPUT+,*REORDERED+ MVDD *ORIGINAL_INPUT,*REORDERED+ MAR *ORIGINAL_INPUT+0B bit_rev_end:*********************FFT CODE********************************* .asg AR1,GROUP_COUNTER .asg AR2,PX .asg AR3,QX .asg AR4,WR .asg AR5,WI .asg AR6,BUTTERFLY_COUNTER .asg AR7,STAGE_COUNTER *******************第一級(jí)蝶形運(yùn)算stage1************************ STM 0,BK LD 1,ASM STM fft_data,PX STM fft_data+K_DATA_IDX_1,QX STM K_FFT_SIZE/21,BRC LD *PX,16,A RPTBD stage1end1 STM K_DATA_IDX_1+1,AR0 SUB *QX,16,A,B ADD *QX,16,A STH A,ASM,*PX+ ST B,*QX+ ||LD *PX,A SUB *QX,16,A,B ADD *QX,16,A STH A,ASM,*PX+0% ST B,*QX+0% 2
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