i2c.lst

此程序用于恒温箱控制

C51 COMPILER V7.07   I2C                                                                   06/10/2005 08:13:56 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE I2C
OBJECT MODULE PLACED IN i2c.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE i2c.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1           
   2          #include "main.h"
   3          #include "i2c.h"
   4          void i2c_writ2(uchar bat );
   5          uchar i2c_rea2(bit ack) ;
   6          void i2c_start(void);
   7          void delay_5us();
   8          //#define ADDR  0x50
   9          
  10          
  11          void i2c_start()
  12          { 
  13   1              SCL=1;delay_5us();
  14   1              SDA=1;delay_5us();
  15   1              SDA=0;delay_5us();
  16   1              SCL=0;delay_5us();
  17   1      }
  18          void i2c_stop()
  19          {
  20   1              SCL=0;//wu
  21   1              SDA=0;delay_5us();
  22   1              SCL=1;delay_5us();
  23   1              SDA=1;delay_5us();
  24   1      
  25   1        
  26   1      }
  27          /**--------------------------------------------------------------------------------
  28           调用方式：bit I2CAck(void) ﹫200 /07/0 4
  29           函数说明：私有函数，I2C用，等待从器件接收方的应答
  30           ---------------------------------------------------------------------------------*/
  31           
  32           /**--------------------------------------------------------------------------------
  33           调用方式：void SendAck(void) ﹫200 /07/0 4
  34           函数说明：私有函数，I2C用，主器件为接收方，从器件为发送方时，非应答信号。
  35           --------------------------------------------------------------------------------*/
  36            
  37          
  38          //------------------------------------------------
  39           
  40           
  41           /*
  42           要求温度的数据为*100/25的整数；或为*4的整数 例如10度，输入的数据为40
  43          */
  44          /*void write_7416T (uchar adr1,uchar adr2,uint dat)//adr1 is 0x02 or 0x00; 
  45            {     
  46                  dat=dat<<6;                                     // when adr2 is 0x02  express TL ,0x03 express TO (over
             - temp)
  47                  i2c_start();
  48                  i2c_writ2(0x90|adr1);
  49                  i2c_writ2(adr2);
  50                  i2c_writ2((uchar)(dat>>8) );
  51                  i2c_writ2((uchar)dat);
  52                  i2c_stop();
  53                  delay(5);//20
  54            } */
C51 COMPILER V7.07   I2C                                                                   06/10/2005 08:13:56 PAGE 2   

  55          void write_7416C(uchar adr1)  //adr1 is 0x02 or 0x00; 
  56            {                              
  57   1              i2c_start();           
  58   1              i2c_writ2(0x90|adr1);
  59   1              i2c_writ2(0x01); 
  60   1              i2c_writ2(0x10);      //2 fault  OTI level is low  ,比较模式在高出高位值后发生低跳变，低于低设定值后恢