pcf8591.lst

CT107D测试程序(含超声测距)

C51 COMPILER V9.02   PCF8591                                                               01/01/2006 06:24:16 PAGE 1   


C51 COMPILER V9.02, COMPILATION OF MODULE PCF8591
OBJECT MODULE PLACED IN .\output\pcf8591.obj
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE pcf8591.c BROWSE DEBUG OBJECTEXTEND PRINT(.\list\pcf8591.lst) OBJECT(.\outp
                    -ut\pcf8591.obj)

line level    source

   1          #include "pcf8591.h"
   2          
   3          void iic_start(void)
   4          {
   5   1        SDA = 1;
   6   1        _nop_();
   7   1        SCL = 1;
   8   1        somenop;
   9   1        SDA = 0;
  10   1        somenop;
  11   1        SCL = 0;
  12   1      }
  13          
  14          void iic_stop(void)
  15          {
  16   1        SDA = 0;
  17   1        _nop_();
  18   1        SCL = 1;
  19   1        somenop;
  20   1        SDA = 1;
  21   1      }
  22          
  23          void iic_ack(bit ackbit)
  24          {
  25   1        if(ackbit) 
  26   1              SDA = 0;
  27   1        else 
  28   1              SDA = 1; 
  29   1        somenop;
  30   1        SCL = 1;
  31   1        somenop;
  32   1        SCL = 0;
  33   1        SDA = 1; 
  34   1        somenop;
  35   1      }
  36          
  37          bit iic_waitack(void)
  38          {
  39   1        SDA = 1;
  40   1        somenop;
  41   1        SCL = 1;
  42   1        somenop;
  43   1        if(SDA)    
  44   1        {   
  45   2              SCL = 0;
  46   2              iic_stop();
  47   2              return 0;
  48   2        }
  49   1        else  
  50   1        { 
  51   2              SCL = 0;
  52   2              return 1;
  53   2        }
  54   1      }
C51 COMPILER V9.02   PCF8591                                                               01/01/2006 06:24:16 PAGE 2   

  55          
  56          void iic_sendbyte(unsigned char byt)
  57          {
  58   1        unsigned char i;
  59   1        for(i=0;i<8;i++)
  60   1        {   
  61   2              if(byt&0x80) 
  62   2            SDA = 1;
  63   2              else 
  64   2                SDA = 0;
  65   2              somenop;
  66   2              SCL = 1;
  67   2              byt <<= 1;
  68   2              somenop;
  69   2          SCL = 0;
  70   2        }
  71   1      }
  72          
  73          unsigned char iic_recbyte(void)
  74          {
  75   1        unsigned char da;
  76   1        unsigned char i;
  77   1        for(i=0;i<8;i++)
  78   1        {   
  79   2              SCL = 1;
  80   2              somenop;
  81   2              da <<= 1;
  82   2              if(SDA) 
  83   2                da |= 0x01;
  84   2              SCL = 0;
  85   2              somenop;
  86   2        }
  87   1        return da;
  88   1      }
  89          
  90          void delay(unsigned char t)
  91          {
  92   1        unsigned char i;
  93   1        while(t--)
  94   1        {
  95   2          for(i=0;i<112;i++);
  96   2        }
  97   1      }
  98          
  99          unsigned char adc_pcf8591(void)
 100          {
 101   1              unsigned char temp;
 102   1      
 103   1              iic_start();
 104   1              iic_sendbyte(0x91);
 105   1              iic_waitack();
 106   1              temp = iic_recbyte();
 107   1              iic_ack(0);
 108   1              iic_stop();
 109   1              
 110   1              return temp;
 111   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    199    ----
   CONSTANT SIZE    =   ----    ----
C51 COMPILER V9.02   PCF8591                                                               01/01/2006 06:24:16 PAGE 3   

   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)