【正文】 *** SSBX INTM 。中斷初始化 ANDM 00ffh,PMST STM 030h,IMR STM 0ffh,IFR RSBX INTM STM temp,AR1 ST 0,*AR1 PORTW *AR1,8000h ST 8888H,*AR1 PORTW *AR1,8000h ST 0,*AR1 PORTW *AR1,8000h RPT 50 NOP。***************************************************BBVV: NOP B BBVV 。******************************************** rxData: 。中斷程序 NOP PSHM 8h 。AL PSHM 9h 。AH PSHM 0ah 。AG PSHM 0bh 。BL PSHM 0ch 。BH PSHM 0dh 。BG PSHM 10h 。AR0 PSHM 11h 。AR1 PSHM 12h 。AR2 PSHM 13h 。AR3 PSHM 14h 。AR4 PSHM 15h 。AR5 PSHM 16h 。AR6 PSHM 17h 。AR7 PSHM 17h 。AR7 PSHM 19h 。BK PSHM 0eh 。T PSHM 6h 。ST0 PSHM 7h 。ST1 NOP PSHM 1ah 。BRC PSHM 1dh 。PMST NOP PSHM 1bh 。RSA PSHM 1ch 。REA LDM 18h,A。 。ANDM 0fffeh,*(18h)。SP NOP NOP PSHM 8h 。 STM temp,AR1 。temp存輸入左聲道樣本 STM temp+1,AR2 。temp+1存輸入右聲道樣本，這里沒用，作保留吧 LDM DRR10,A STL A,*AR1 。AR1存左聲道，AR2存右聲道,我們用左聲道 LDM DRR20,A STL A,*AR2 STM Echo,AR4 。是否FIR處理的分支 CMPM *AR4,1 BC FIR,TC B NOFIR FIR: sSBX FRCT STM temp,AR1 。temp存輸入左聲道樣本 LD *AR1,A 。 STM buffer+1,AR3 。 STL A,*AR3 。將最新樣本存入fx[1],fx[0]保留空間,存FIR后的輸出暫存 STM buffer+levelN,AR2 。將AR2指針指向最高位（最老數(shù)據(jù)）(25) RPTZ A,levelN1 。24 MACD *AR2,COEF,A STH A,*AR2 。 STM temp2,AR5 。把FIR后的數(shù)據(jù)放在temp2 LD *AR2,A STL A,*AR5 NOP RSBX FRCT NOP B L1 NOFIR: STM temp,AR1 LD *AR1,A STLM A,DXR10 。把未經(jīng)FIR處理的數(shù)據(jù)直接輸出 LD *AR1,A L1: STM temp1,AR4 。存進DATAIN的數(shù)組里，這樣好分析數(shù)據(jù) LD 2000H,A ADD *AR4,A 。A放了數(shù)組地址 STLM A,AR5 。將地址放在AR52 LDM AR5,A STM temp+3,AR5 STL A,*AR5 STLM A,AR6 STM temp,AR1 LD *AR1,A STL A,*AR6 STM temp1,AR4 。存進DATAOUT的數(shù)組里 LD OUT,A ADD *AR4,A 。A放了數(shù)組地址 STLM A,AR5 。將地址放在AR5 LDM AR5,A STM temp+3,AR5 STL A,*AR5 STLM A,AR6 STM temp2,AR1 LD *AR1,A STL A,*AR6 。 STM temp2,AR5 LD *AR5,A STLM A,DXR10 。放在這里居然沒問題，放在后邊就不行了！ STLM A,DXR20 STL A,*AR6 。STLM A,DXR10 。STLM A,DXR20 LD 1,A ADD *AR4,A STL A,*AR4 CMPM *AR4,2000h。8192 BC LTTT,NTC ST 0,*AR4 NOP NOP 。BC LTTT,AGT 。ST 0,*AR3 LTTT: POPM 18h NOP POPM 1ch POPM 1bh POPM 1dh NOP POPM 1ah POPM 7h NOP POPM 6h POPM 0eh POPM 19h POPM 17h POPM 17h POPM 16h POPM 15h POPM 14h POPM 13h POPM 12h POPM 11h POPM 10h POPM 0dh POPM 0ch POPM 0bh POPM 0ah POPM 9h POPM 8h RETEVECTORS文件 .sect .vectors .align 0x80 。 must be aligned on page boundary .ref start .ref rxData RESET: B start 。 reset vector NOP 。 branch to C entry point NOP 。 stack size of 200nmi: RETE 。 enable interrupts and return from one NOP NOP NOP 。NMI~ 。 software interruptssint17 .space 4*16sint18 .space 4*16sint19 .space 4*16sint20 .space 4*16sint21 .space 4*16sint22 .space 4*16sint23 .space 4*16sint24 .space 4*16sint25 .space 4*16sint26 .space 4*16sint27 .space 4*16sint28 .space 4*16sint29 .space 4*16sint30 .space 4*16int0: RETE NOP NOP NOPint1: RETE NOP NOP NOPint2: RETE NOP NOP NOPtint: RETE NOP NOP NOP rint0: B rxData NOP NOPxint0: RETE NOP NOP NOP rint2: RETE NOP NOP xint2: RETE NOP NOPint3: RETE NOP NOP NOPhint: RETE NOP NOP NOP rint1: RETE NOP NOP NOP xint1: RETE NOP NOP NOP dmac4: RETE NOP NOP NOP dmac5: RETE NOP NOP NOP .endMEMORY{ PAGE 0: VECS : o=0x0080 , l=0x0080 PROG : o=0x0100 , l=0x1f00 PAGE 1: DATA : o=0x2000 , l=0x9000}SECTIONS{ .vectors:VECS PAGE 0 .text :PROG PAGE 0 .data :PROG PAGE 0 .bss :DATA PAGE 1 stack :DATA PAGE 1 buffer :DATA PAGE 1 IN :DATA PAGE 1 OUT :DATA PAGE 1}