main.lst

Demo for I2C Master and Slave

C51 COMPILER V7.20   MAIN                                                                  07/21/2004 16:31:42 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*------------------------------------------------------------------------------
   2          main.c
   3          
   4          Version:
   5          June 2004 Version 1.0 - Initial Version
   6          
   7          Dependencies:
   8          upsd_lcd.c   - LCD driver.
   9          upsd_i2c.c   - I2C driver.
  10          upsd_timer.c - Timer driver.
  11          
  12          
  13          Description:  Demo for I2C Master
  14          The main function of this code is to demonstrate the use of the I2C driver in
  15          Master mode.  As a master, the uPSD device writes data to a slave device over
  16          the I2C bus and reads it back.  It compares the received data with the sent data
  17          and confirms with a message on the LCD if there is a match.  
  18          
  19          It is intended that the I2C slave device this master communicates with is a uPSD
  20          device programmed with the I2C Slave demo code.  The SCL and SDA lines of the
  21          master and slave devices must be connected together and a pull-up is on each 
  22          signal.  The two devices must also have their GNDs tied together.  Using two 
  23          DK3200 boards, no pull-ups are required (they are included on the boards) but 
  24          the two signals (SCL, SDA) plus GND must be connected.
  25          
  26          
  27          Copyright (c) 2004 STMicroelectrons Inc.
  28          
  29          This example demo code is provided as is and has no warranty,
  30          implied or otherwise.  You are free to use/modify any of the provided
  31          code at your own risk in your applications with the expressed limitation
  32          of liability (see below) so long as your product using the code contains
  33          at least one uPSD product (device).
  34          
  35          LIMITATION OF LIABILITY:   NEITHER STMicroelectronics NOR ITS VENDORS OR 
  36          AGENTS SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
  37          INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
  38          CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
  39          OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  40          ------------------------------------------------------------------------------*/
  41          #include "upsd3200.h"
  42          #include "upsd_hardware.h"
  43          #include "upsd_i2c.h"
  44          #include "upsd_timer.h"
  45          #include "upsd_LCD.h"
  46          
  47          #define I2C_ADDR 0x88
  48          #define buf_len 0x04
  49          
  50          xdata unsigned char temp_xmit_buf[20];                          // message transmit buffer
  51          xdata unsigned char temp_rcv_buf[20];                           // message receive buffer
  52          xdata PSD_REGS PSD8xx_reg _at_ PSD_REG_ADDR; 
  53          
  54          
  55          bit match_buf(unsigned char* a, unsigned char* b, unsigned char length)
C51 COMPILER V7.20   MAIN                                                                  07/21/2004 16:31:42 PAGE 2   

  56          {
  57   1              unsigned char i;
  58   1              for(i=1;i<=length;i++)
  59   1              {
  60   2                      if(a[i-1]!=b[i-1])
  61   2                              return 0;
  62   2              }
  63   1              return 1;
  64   1      }
  65          
  66          main()
  67          {
  68   1              static unsigned char i,temp;
  69   1              static unsigned char databuf[4]={0x55, 0xAA, 0x5A, 0xA5};
  70   1      
  71   1              temp = 0x00;
  72   1              WDKEY=0x55;                                                                                     // disable watchdog timer
  73   1              PSD8xx_reg.VM |= 0x80;  
  74   1              timer0_init();                                                                          // initialize timer0 interrupt 
  75   1              lcd_init();                                                                                     // initialize LCD. 8 bits, 2 lines, 5x7 font,
  76   1              printfLCD("I2C Master");                                                        // display on LCD
  77   1              printfLCD("\nWaiting on Slave\n");                                      // display on LCD
  78   1              delay_1sec();
  79   1      
  80   1              for(i=0;i<20;i++)
  81   1                      temp_xmit_buf[i]=databuf[i];
  82   1              
  83   1              upsd_i2c_init (833,I2C_ADDR);                                           // I2C initialization
  84   1      
  85   1              while(1)
  86   1              {
  87   2                      EA=0;
  88   2                      while(temp!=I2C_MX_END)
  89   2                              temp=upsd_i2c_Master_Xmit(I2C_ADDR,temp_xmit_buf,buf_len);
  90   2      
  91   2                      printfLCD("\nTransmit OK     \n");
  92   2                      delay_1sec();
  93   2                      
  94   2                      for(i=0;i<20;i++)
  95   2                              temp_rcv_buf[i]=0;
  96   2                      
  97   2                      while(temp!=I2C_MR_END)
  98   2                              temp=upsd_i2c_Master_Recv (I2C_ADDR,temp_rcv_buf,buf_len);
  99   2      
 100   2                      printfLCD("\nReceive OK      \n");
 101   2                      delay_1sec();
 102   2                                      
 103   2                      if(match_buf(temp_xmit_buf,temp_rcv_buf,buf_len)==1)
 104   2                      {
 105   3                              printfLCD("\nMatch    OK     \n");
 106   3                              delay_1sec();
 107   3                      }
 108   2                      else 
 109   2                      {
 110   3                              printfLCD("\nNo Match        \n");
 111   3                              delay_1sec();
 112   3                      }       
 113   2              }
 114   1      }
 115          
 116          

C51 COMPILER V7.20   MAIN                                                                  07/21/2004 16:31:42 PAGE 3   


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    299    ----
   CONSTANT SIZE    =    106    ----
   XDATA SIZE       =     40    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6       8
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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