dsp課程設(shè)計(jì)報(bào)告--fft的dsp實(shí)現(xiàn)-在線瀏覽
2025-03-06 11:26本頁面
【正文】 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 ||LD *PX,A stage1end:******************第二級(jí)蝶形運(yùn)算stage2*************************** STM fft_data,PX STM fft_data+K_DATA_IDX_2,QX STM K_FFT_SIZE/41,BRC LD *PX,16,A RPTBD stage2end1 STM K_DATA_IDX_2+1,AR0。2nd butterfly MAR *QX+ ADD *PX,*QX,A SUB *PX,*QX,B STH A,ASM,*PX+ SUB *PX,*QX,A ST B,*QX ||LD *QX+,B
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