下面程序大家有没有懂的，帮忙每一句注释一下，谢谢了
LCD12864_PutNumber(4);
     break;
    case 50:
    Openloop_Step = 1;
   // Digit_Set(STEP_POS, 1);
 
  LCD12864_SetXY(0,2);
  LCD12864_PutNumber(1);
 break;   }
  break;
  case 1:
  case 2:
  case 3:
 // Digit_NormalMode(SETTING_POS0);
  // Digit_NormalMode(SETTING_POS1);
 LCD12864_SetXY(1,2);
 LCD12864_SetXY(1,3);  
  SettingAngle = TempAngle;
   Function_is_done = 0;
   break;  case 4:   break;
  case 5:
  if(ktype == eKTYPE_LPRESS)
    MMA7455_Calibrate();
   break;  }
 Function_is_begin = 1;  }
  
void Key3_Press(unsigned char ktype) {
 switch(System_Function){
  case 0:
  if(Openloop_PWM < 1023 - Openloop_Step)
    Openloop_PWM += Openloop_Step;  
  PWM_OutPut(Openloop_PWM);
  //Digit_Number(1, Openloop_PWM);
LCD12864_SetXY(1,2);
  LCD12864_PutNumber(TempAngle/10);
LCD12864_SetXY(1,3);
                               LCD12864_PutNumber(TempAngle/10);
 // Digit_Set(SETTING_POS1, TempAngle%10);
    break;
  case 4:
   break;
  case 5:
   break;  }
 }

void Function_ParseKeyMsg(struct MSG *pmsg) {
 switch(pmsg->parma.data[0])
  {
 case 1:
  Key1_Press(pmsg->parma.data[1]);   break;
  case 2:
  Key2_Press(pmsg->parma.data[1]);   break;
  case 3:
  Key3_Press(pmsg->parma.data[1]);   break;
  case 4:
  Key4_Press(pmsg->parma.data[1]);   break;  
 } }  
void Function_Init(void) {
 System_Function = 6;
  Function_is_begin = 0;
  SettingAngle = 0;
  Openloop_Step = 5;
  Openloop_PWM = 100;

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