基于DSP芯片设计的一种波形发生器

mmregsglobal mainsectMAIN"main:stm#TAB,ARO;指向表头tm#167H,AR3:设定循环次数HI PULSE:ssbx xfstm #20H,AR5NOPL00P1:NOPBANZ LOOP1,*AR5-;delay1NOPportw *ar0+,8h al--cs 60ns,a2--r/w 60ns,a0--clr 70nsNOPNOPNOPrsbx xf 1dac(70ns)'0'transferedportw ar5,3ha0--clr'1'transfereNOPNOPNOPportw *ar5,7h a0--clr(70ns)clr'0'a2--r/w'1'clear dac latchBANZ TT,.AR3-;判断到达表尾，调转到表头stm#TAB,ARO;指向表头stm#167H,AR3;设定循环次数B HI_PULSE portw *ar5,4h a0--clr a0--clr'0'a2--r/w'1'clear dac latchTT:stm #20H,AR2NOPL00P2:delay2NOPBANZ LOOP2,*AR2-NOP:未到表尾B HI PULSETAB::该表为正弦表值，也可以改为所需任意波形表值word 0ff82H,Off4bH,0ffOaH,OfecOH,Ofe6bHword Ofe0dH,Ofda4H,0fd32H,0fcb7H,0fc31H,W0d…word Off82H,OffafH,Offd2H,OffebH,OfffaHend系统设计应注意的几个问题