main.c

st7 单片机模拟I2C软件包 对没有I2C总线的单片机需要I2C功能非常有用

/**************** (c) 2003  STMicroelectronics ********************************

PROJECT  : EVALUATION BOARD - ST7 I2C 
COMPILERS : COSMIC AND METROWERKS 
MODULE  :  main.c
REVISION DATE :  12/06/03
AUTHOR :  Micro Controller Division Application Team 

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    THE SOFTWARE INCLUDED IN THIS FILE IS FOR GUIDANCE ONLY. STMicroelectronics 
    SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL 
    DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM USE OF THIS SOFTWARE.
    
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DESCRIPTION :   ST7 I2C main test software.

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MODIFICATIONS :

  27/08/98  - V1.0  - First version (error management:AF).
  12/06/03  - V1.1  - 1) Compatibility With Cosmic And Metroworks.
                      2) Generation Of Non - Ack.
                      3) Update for st72324                            


******************************************************************************/

/* EXTERNAL DECLARATIONS *****************************************************/
/* List of all the variables defined in another module and used in this one. */
/* MODEL => #include {file_name}.h                                           */
#include "map72324.h"                 /* Declaration of the I2C HW registers.*/
#include "i2cm_drv.h"                            /* I2C single master driver.*/
#include "variable.h"
#include "lib_bits.h"
                    

/* MACRO FUNCTION DECLARATIONS ***********************************************/
/* MODEL => #define macro_name macro                                         */

#ifdef __HIWARE__
#define WAIT_1ms()  for (i=0xFF; i>0; i--)  asm NOP         /* Wait for ~1ms.*/
#else
#ifdef __CSMC__
#define WAIT_1ms()  for (i=0xFF; i>0; i--)  { _asm( "NOP" ); }  
                                                            /* Wait for ~1ms.*/
#endif
#endif
/* STATIC DECLARATIONS *******************************************************/
/* List of all the variables/constant defined in another module and used in  */
/* this one.                                                                 */
/* MODEL => static type_name var_name;  or #define                           */

void main (void)
{                       
     I2Cm_Init();                   /* I2C peripheral initialization routine.*/
                                    
     while (1)
     {
                               
          #ifdef __HIWARE__           
          asm
          {
               trans:
          }   
          #else
          #ifdef __CSMC__
          {
               _asm ( "trans:");
          }  
  
          #endif 
          #endif
     
          ClrBit(I2C_SR1,RCPT);
          I2Cm_Start();
          I2Cm_Tx(send_tab,n);           /* Transmit data byte to the slave. */
          if (ValBit(I2C_SR2,AF))
          {
               ClrBit(I2C_SR2,AF);
               t_count_err++;
        
               #ifdef  __HIWARE__ 
          
               asm  JRA     trans  
          
               #else
               #ifdef __CSMC__
               {
                    _asm( "JRA   trans");
               }
               #endif    
               #endif 
          
          }
          I2Cm_Stop();
          WAIT_1ms();   
         
          #ifdef __HIWARE__
          asm
          {
               recept:
          }       

          #else 
          #ifdef __CSMC__
          {
               _asm ("recept:");
          }
          #endif
          #endif

          I2Cm_Start();          
          I2Cm_Rx(rec_tab,n);           /* Receive data byte from the slave. */
          if (ValBit(I2C_SR2,AF))
          {
               ClrBit(I2C_SR2,AF);
               r_count_err++;   

               #ifdef __HIWARE__      
        
               asm  JRA     recept
               #else
               #ifdef __CSMC__

               _asm("JRA     recept");

               #endif
               #endif 
                
          }
          I2Cm_Stop();
          WAIT_1ms();
          
     }                                                                              
}
              
/***************** (c) 2003  STMicroelectronics ************** END OF FILE ***/