.title “FIR1.ASM”.mmregs.def startx .usect “x”,7PA0 .set 0PA1 .set 1 .dataCOEF: .word 1*32768/10 .word 2*32768/10 .word -4*32768/10 .word 3*32768/10 .word -4*32768/10 .word 2*32768/10 .word 1*32768/10 .textstart: SSBX FRCT 注释 ______ ______ STM #6,AR0 LD #x+1,DP PORTR PA1,@x+1 FIR1： RPTZ A,#6 ______ STH A,*AR2 PORTW *AR2+,PA0 BD FIR1 ______ PORTR PA1,*AR2+0 end STM #x+7,AR2 STM #6,AR0 LD #x+1,DP PORTR PA1,@x+1 FIR1： RPTZ A,#6 MACD *AR2-,COEF,A STH A,*AR2 PORTW *AR2+,PA0 BD FIR1 循环 PORTR PA1,*AR2+0 end