cfft256.asm

计算256点FFT的源码

;Filename cfft256.asm
;Designed by [e-mail]
             .title "zxy_fft5k_program"
             .mmregs
             .global _c_int00
    
             .include "vc54xnt.inc"
             .include "cfft256coff.inc"
             .include "cfft256fn.inc"
      
STACK        .usect "stack",stack_size
SYSTEM_STACK .set STACK+stack_size
           
             .sect "vectors"
reset:   
              BD     _c_int00
              STM   #SYSTEM_STACK,SP
             .space 31*4*16

             .text
_c_int00:
        NOP
        CALL   c54x_init    		; Initialize CPU and clear A and B
        CALL	bit_rev 	;Here AR7 --> fft_data , others is free
		NOP
		CALL	fft_task
		NOP
		CALL	fft_test
		NOP
main_start:
		B      main_start

        .end