main.asm

DA实验的具体内容

.include SPCE061A.inc
.RAM
.VAR DA_Data
.CODE
.PUBLIC _main
_main:
   R1=0x00A0
   [P_DAC_Ctrl]=R1
   R1=0x0030     //24.576MHZ
   [P_TimerA_Ctrl]=R1
   R1=0xf7ff     //
   [P_TimerA_Data]=R1
   R1=0xffff
   [DA_Data]=R1
   [P_DAC1]=R1
   [P_DAC2]=R1
   FIQ ON
  ?loop:
   JMP ?loop   
   
  .TEXT
  .PUBLIC _FIQ
  _FIQ:
  FIQ OFF
  R1=[DA_Data]
  R1^=0xffff
  [DA_Data]=R1
  [P_DAC1]=R1
  [P_DAC2]=R1
  FIQ ON
  RETI