这段程序看不明白，请大家帮我看看是做什么用的？帮我注释一下谢谢

2020-02-09 09:26发布

//*****************************************************
// verify 40 SN  if there is a same CF=1,else CF=0
//*****************************************************
bit Verify_120(void)
{
unsigned char i,addr,tmp;
addr=0;
i=40;
do
{
      tmp=EEPROM_READ(addr++);

      if(qk_cnt!=0)             // recieve a qk signal
         {
         if((tmp&0x01)==0)
            {addr+=2;continue;};// memory is dk
         if(((tmp&0x80)==0)||((CSR0&0x80)==0))
            {
            if(((tmp^CSR0)&0xf0)!=0)
                  {addr=addr+2;continue;};
            }
         }
      else                      //recieve a dk signal
         {
         if((tmp&0x01)==1)
            {addr=addr+2;continue;};//memory is qk
         if(((tmp^CSR0)&0xf0)!=0)
         {addr=addr+2;continue;};
         }
      tmp=EEPROM_READ(addr++);
      if((tmp^CSR1)!=0)
         {addr+=1;continue;}
      tmp=EEPROM_READ(addr++);
      if((tmp^CSR2)!=0)
         {addr=addr+0;continue;}
      return(1);
}
while(--i!=0);
return(0);
}

bit read_s_port(unsigned char cnt)
{
unsigned char i;
TRISA2=1;
while(1)
{
rrr:
      i=cnt;
      if(RA2)
      {
         do
         {
            if(RA2==0)
                  goto rrr;
         }
         while(--i!=0);
         RA2=1;
         TRISA2=0;
         return 1;
      }
      else
      {
         do
         {
            if(RA2==1)
                  goto rrr;
         }
         while(--i!=0);
         RA2=1;
         TRISA2=0;
         return 0;
      }
}
}
void do_up(void)
{
            t0_cnt=3662;
            if(led_down==1)
            {
                  led_down=0;
                  delay_1s_stop();
                  if(CARRY==0)
                  {
                     work_led=w_on;
                     led_up=1;
                  }
            }
            else
            {
                  work_led=w_on;
                  led_up=1;
            }
}
void do_down(void)
{
            t0_cnt=3662;
            if(led_up==1)
            {
                  led_up=0;
                  delay_1s_stop();
                  if(CARRY==0)
                  {
                     work_led=w_on;
                     led_down=1;
                  }
            }
            else
            {
                  work_led=w_on;
                  led_down=1;
            }
}
void do_stop(void)
{
work_led=w_off;
led_up=0;
led_down=0;
}

main()
{
volatile unsigned char j;
OSCCAL=_READ_OSCCAL_DATA();
init();
led_up=0;
led_down=0;
work_led=w_off;
TRISA2=1;
recieve();
t0_cnt=3662;
while(1)
{
      if(T0IF)             //0.065536 S
      {
         T0IF=0;
         fan_reg<<=1;
         if(fan)
            bitset(fan,0);
         if(--t0_cnt==0)    // 4 minitue
         {
            work_led=w_off;
            t0_cnt=3662;
            led_up=0;
            led_down=0;
         }

      }
      key_tmp=PORTC&0x038;
      j=6;
      do
      {
         if((PORTC&0x038)!=key_tmp)
         {
            j=6;
            continue;
         }
      }
      while(--j!=0);
      recieve();
      if(CARRY==1)
      {
         Verify_120();
         if((CARRY==1)||(key_tmp&0x38)!=0x38)
         {
            if((key_stop==0)||(CSR0&0xf)==4)
            {
                  do_stop();
            }
            if((key_up==0)||(CSR0&0xf)==8)
            {
                  if(fan_reg==0)
                     do_up();
                  else
                     do_down();
            }
            if((key_down==0)||(CSR0&0xf)==1)
            {
                  if(fan_reg==0)
                     do_down();
                  else
                     do_up();
            }
         }
      }
      if(RA2==1)
      {
         work_led=w_off;
         led_up=0;
         led_down=0;
         TRISA2=0;
         RA2=1;
         TMR0=0;
         learn_cnt=153;
         while(1)
         {
            recieve();
            if(CARRY==1)
            {
                  if((CSR0&0xf)==2)
                  {
                     Write_a_sn();
                     learn_cnt=5;
                     do
                     {
                        RA2=0;
                        delay_1ms(250);
                        RA2=1;
                        delay_1ms(250);
                     }
                     while(--learn_cnt!=0);
                     TRISA2=1;
                     break;
                  }
            }
            if(!T0IF)
                  continue;
            T0IF=0;
            if(--learn_cnt==0)
            {
                  TRISA2=1;    //10 second reach
                  break;
            }
            TRISA2=1;
            if(read_s_port(10)==1)
            {
                  if(++l_cnt2==32)
                  {
                     TRISA2=0;
                     RA2=0;
                     Erase_120();
                     delay_1ms(250);
                     delay_1ms(250);
                     delay_1ms(250);
                     delay_1ms(250);
                     TRISA2=1;
                     break;
                  }
            }
            else
            {
                  if(l_cnt2!=0)
                     l_cnt2--;
            }
         }
      }
}
}

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