i2c.lst

80c51F020的开发程序 包括ADC DDS DAC

C51 COMPILER V7.10   I2C                                                                   09/03/2007 16:49:16 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE I2C
OBJECT MODULE PLACED IN i2c.OBJ
COMPILER INVOKED BY: D:\silabs\IDEfiles\C51\BIN\C51.exe i2c.c DB OE

line level    source

   1          /*------------------------------------------------------------
   2                  File Name:              i2c.c
   3                  Auther:                 Samuel
   4                  Revision:               R1
   5                  History:                R1                      Jul.05, 2007            Creation
   6          ------------------------------------------------------------*/
   7          
   8          
   9          #include "i2c.h"
  10          
  11          // SMBus byte write function-----------------------------------------------------
  12          // Writes a single byte at the specified memory location.
  13          //
  14          // out_byte = data byte to be written
  15          // byte_address = memory location to be written into (2 bytes)
  16          // chip_select = device address of EEPROM chip to be written to
  17          void EEPROM_Send (char chip_select, unsigned int byte_address, char out_byte)
  18          {
  19   1         
  20   1         I2C_Device=EEPROM; // To tell the interrupt service routine what the I2C device is!
  21   1      
  22   1         while (SM_BUSY);                          // Wait for SMBus to be free.
  23   1         SM_BUSY = 1;                              // Occupy SMBus (set to busy)
  24   1         SMB0CN = 0x44;                            // SMBus enabled,
  25   1                                                   // ACK on acknowledge cycle
  26   1      
  27   1         BYTE_NUMBER = 2;                          // 2 address bytes.
  28   1         COMMAND = (chip_select | WRITE);          // Chip select + WRITE
  29   1      
  30   1         HIGH_ADD = ((byte_address >> 8) & 0x00FF);// Upper 8 address bits
  31   1         LOW_ADD = (byte_address & 0x00FF);        // Lower 8 address bits
  32   1      
  33   1         WORD = out_byte;                          // Data to be writen
  34   1         
  35   1         STO = 0;
  36   1         STA = 1;                                  // Start transfer
  37   1      
  38   1      }
  39          
  40          // SMBus random read function------------------------------------------------------
  41          // Reads 1 byte from the specified memory location.
  42          //
  43          // byte_address = memory address of byte to read
  44          // chip_select = device address of EEPROM to be read from
  45          char EEPROM_Receive (char chip_select, unsigned int byte_address)
  46          {
  47   1         
  48   1         I2C_Device=EEPROM;   // To tell the interrupt service routine what the I2C device is!           
  49   1      
  50   1         while (SM_BUSY);                          // Wait for bus to be free.
  51   1         SM_BUSY = 1;                              // Occupy SMBus (set to busy)
  52   1         SMB0CN = 0x44;                            // SMBus enabled, ACK on acknowledge cycle
  53   1      
  54   1         BYTE_NUMBER = 2;                          // 2 address bytes
  55   1         COMMAND = (chip_select | READ);           // Chip select + READ
C51 COMPILER V7.10   I2C                                                                   09/03/2007 16:49:16 PAGE 2   

  56   1      
  57   1         HIGH_ADD = ((byte_address >> 8) & 0x00FF);// Upper 8 address bits
  58   1         LOW_ADD = (byte_address & 0x00FF);        // Lower 8 address bits
  59   1         
  60   1         STO = 0;
  61   1         STA = 1;                                  // Start transfer
  62   1         while (SM_BUSY);                          // Wait for transfer to finish
  63   1         return WORD;
  64   1      }
  65          
  66          
  67          ///////////////////////////////////////////////
  68          void TEA5777_Send (void)
  69          {
  70   1              I2C_Device=TEA5777;     // To tell the interrupt service routine what the I2C device is!           
  71   1              while (SM_BUSY);                          // Wait for bus to be free.
  72   1              SM_BUSY = 1;                              // Occupy SMBus (set to busy)
  73   1              SMB0CN = 0x44;                            // SMBus enabled, ACK on acknowledge cycle
  74   1      
  75   1              COMMAND = 0xC0;           // TEA5777 address + WRITE
  76   1          BYTE_NUMBER=6;
  77   1              STO = 0;
  78   1              STA = 1; 
  79   1              while (SM_BUSY);                                         // 发起始条件
  80   1                      
  81   1      }
  82          
  83          ///////////////////////////////////////////////
  84          void TEA5777_Receive (void)
  85          {
  86   1              I2C_Device=TEA5777;     // To tell the interrupt service routine what the I2C device is!           
  87   1              while (SM_BUSY);                          // Wait for bus to be free.
  88   1              SM_BUSY = 1;                              // Occupy SMBus (set to busy)
  89   1              SMB0CN = 0x44;                            // SMBus enabled, ACK on acknowledge cycle
  90   1      
  91   1              COMMAND = 0xC1;           // TEA5777 address + READ
  92   1      
  93   1              STO = 0;
  94   1              STA = 1;                                  // 发起始条件
  95   1              
  96   1              while (SM_BUSY);                          // Wait for transfer to finish
  97   1              TEA5777_receive_buffer[0]= WORD;
  98   1              SM_BUSY = 1;
  99   1      
 100   1              while (SM_BUSY);                          // Wait for transfer to finish
 101   1              TEA5777_receive_buffer[1]= WORD;
 102   1              SM_BUSY = 1;
 103   1      
 104   1              AA=0;
 105   1              while (SM_BUSY);                          // Wait for transfer to finish
 106   1              TEA5777_receive_buffer[2]= WORD;
 107   1      
 108   1          //STO=1;
 109   1      }
 110          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    132    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
C51 COMPILER V7.10   I2C                                                                   09/03/2007 16:49:16 PAGE 3   

   DATA SIZE        =     22    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      2    ----
END OF MODULE INFORMATION.


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