关于应广单片机读取数字传感器（PIR）

//本次试验用到的是（PMS150G）光敏检测（高电平触发）
#include    "extern.h"

#define pir      pa.7 
#define cds_io   pa.6
#define LED3    pa.5
#define LED2    pa.4
#define LED1    pa.3
#define key_io     pa.0
void UserFunction1(void);
void main0(void);
void main1(void);
void main2(void);
void pir_fun(void);
void cds_fun(void);
void delay_1s(void);
//**************************************************
//**************************************************
//  Define General Register

.RAMADR 0
word    fpp0_point;  //延时
word    tm16c;
.RAMADR SYSTEM
//用户变量添加
//位变量
//bit        bitTest;
word    tim_num,tim_xs_num,tim_set_num,rember2,rember1;
word    delay_1s_num;
byte    mode_flag;
//字节变量
//byte    bTest;
bit cds_flag,pir_flag,pir_off_flag,tim_lock,repeat_lock;
//**********************************************************************************************************
//===================================== IO口，定时器、中断配置    
//**********************************************************************************************************
void    system_initial (void)
{
//************************ 定时器设置 ******************************
    $  T16M   ILRC /1  , BIT8;        //时钟源IHRC,16分频，10位定时器
    tm16c = 253;                    //1ms中断初值  此数值为计数器重装值，溢出值1024
     stt16 tm16c;
    tm2ct=0x00;
    tm2b=0x00;
    tm2s=0b1_00_00001;
    tm2c=0b0100_10_0_0;
//************************** IO_设置 ******************************
    misc    =         00000000b;
    pa      =       00000000b;
    pac     =       00111000b;
    paph    =       00000001b;
    pa      =       00000000b;
    PADIER  =       0xC1;
//************************** 中断 设置 ******************************
    integs      =   00000010b;
       intrq       =   00000000b;
    inten   =         01000100b;        //开启中断 :T16,ADC    
    LED2= 0;
    tim_set_num=20;                    //
    tim_xs_num=10;
    mode_flag=0;
}
void    FPPA0 (void)
{
//--------------------------------------//power on delay 70ms
    //    WatchDog Disable, RAM 0 ~ 0xF temporary be used
    //    You can add the follow code :
    //        CLKMD.En_WatchDog    =    1;        // WatchDog Enable
    .ADJUST_IC    SYSCLK=ILRC , IHRC=16MHz, VDD=5V;

    fpp0_point = 10000;
    while(fpp0_point)
    {
        fpp0_point--;
    }                
//--------------------------------------//clear all of general register
    fpp0_point = _SYS(RAM_SIZE) - 1;        
    do
    {
        *fpp0_point = 0;
    }while(-- fpp0_point$0);
//--------------------------------------//if has more FPPAs than 2
    #if     _SYS(FPPA) != 1
        pmode   Program_Mode;                  
    #endif
    fpp0_point = 10000;
    while(fpp0_point)
    {
        fpp0_point--;
    }
    system_initial();
    engint;                              //开启总中断
                                         //.disgint;//关闭总中断
//==========================================================================================================//
    while (1)
    {
        NOP;
        UserFunction1();
    }
}

void    Interrupt (void)
{
    pushaf;
    if (Intrq.T16)
    {    
        tim_num++;
        if(tim_num==72)     //1s定时
        {        
            tim_num=0;
            if(tim_lock==0)
                tim_xs_num++;
        }
        Intrq.T16    =    0;
    }
    popaf;
}
//==========================================================================================================//
//=++++++++++++++++++++++++++++++++++++++++++++++use fun+++++++++++++++++++++++++++++++++++++++++++++++++++//
//==========================================================================================================//
void UserFunction1(void)
{    
    main1();
}
//==========================================================================================================//
//=++++++++++++++++++++++++++++++++++++++++++++++光敏 fun+++++++++++++++++++++++++++++++++++++++++++++++++++//
//==========================================================================================================//
void cds_fun()
{
    if(cds_io==1)
        cds_flag=1;
    else
    {    cds_flag=0;    
        pir_flag=0;    
        LED2=0;
        tm2c.3=0;
        tm2b=0xab;
        tim_xs_num=0;
    }
}
void pir_fun()
{     
    cds_fun();
    if(pir_off_flag==0)
    {
        if((cds_flag==1)&&(pir==1))
        {
            pir_flag=1;    
            tim_xs_num=0;
        }
        else
            pir_flag=0;

    }
}
void repeat_fun()
{
        if(pir==1)
        {
          tim_xs_num=0;
        }
}
//=++++++++++++++++++++++++++++++++++++++++++++++1 fun+++++++++++++++++++++++++++++++++++++++++++++++++++//
void main1()
{
    pir_fun();
    if(pir_flag==1)
    {
        if(tim_xs_num<tim_set_num)
        {
            pir_off_flag=1;
            tim_lock=0;
            repeat_fun();
            LED2=1;
            tm2c.3=1;
            tm2b=0x40;
        }
        elseif(tim_lock==0)
        {
            pir_off_flag=0;
            pir_flag=0;
            tim_xs_num=0;
            tim_lock=1;
            LED2=0;
            tm2c.3=0;
            tm2b=0x00;
            delay_1s();
        }
    }
    else
    {
        LED2=0;
        tm2c.3=0;
        tm2b=0x00;
        LED1=0;
        pir_off_flag=0;
        pir_flag=0;
        tim_xs_num=0;
    }
}
//=++++++++++++++++++++++++++++++++++++++++++++++delay_1s fun+++++++++++++++++++++++++++++++++++++++++++++++++++//
void delay_1s()
{
    delay_1s_num=250;
    while(delay_1s_num--){NOP;}
}