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来自「Freescale 系列单片机常用模块与综合系统设计」· 代码 · 共 102 行

/** ###################################################################
**     Filename  : IIC_Master.C
**     Project   : IIC_Master
**     Processor : MC9S08JM60CLHE
**     Version   : Driver 01.11
**     Compiler  : CodeWarrior HCS08 C Compiler
**     Date/Time : 2010-1-15, 8:45
**     Abstract  :
**         Main module.
**         This module contains user's application code.
**     Settings  :
**     Contents  :
**         No public methods
**
** ###################################################################*/
/* MODULE IIC_Master */


/* Including needed modules to compile this module/procedure */
#include "Cpu.h"
#include "Events.h"
#include "I2C_Master.h"
/* Include shared modules, which are used for whole project */
#include "PE_Types.h"
#include "PE_Error.h"
#include "PE_Const.h"
#include "IO_Map.h"

word rec_count;
word bytes_to_trans;

char IIC_Data[9];
char IIC_Rec_Data[9];

char Alarm = 0;

/* User includes (#include below this line is not maintained by Processor Expert) */

void main(void)
{
  /* Write your local variable definition here */

  /*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/
  PE_low_level_init();
  /*** End of Processor Expert internal initialization.                    ***/
 I2C_Master_SelectSlave(0x0a);
 
 PTAPE_PTAPE2 =1;	 //Enable Pull ups on SW pins
 PTAPE_PTAPE3 =1;
  /* Write your code here */
  for(;;) {
     //select channel here
     if (PTAD_PTAD2 == 0)
     {
         while (PTAD_PTAD2 ==0);  //WAIT WHILE PIN IS LOW
          
          IIC_Data [0] = 0x01; //Set Threshold
          IIC_Data [1] = 0xff; //
          IIC_Data [2] = 0x00; //Select Channel

         while (IICC_MST == 1);			 //Wait till IIC is stopped
         	    
         I2C_Master_SendBlock(&IIC_Data, 0x03, &bytes_to_trans);     //  Transmit commands and Threshold		
       }
       
       if (PTAD_PTAD3 == 0)
       {
         while (PTAD_PTAD3 ==0); //WAIT WHILE PIN IS LOW
          
          IIC_Data [0] = 0x01; //Set Threshold
          IIC_Data [1] = 0xff; //
          IIC_Data [2] = 0x01; //Select Channel
         
         	while (IICC_MST == 1);				//Wait till IIC is stopped
         	I2C_Master_SendBlock(&IIC_Data, 0x03, &bytes_to_trans);           
       }
       while (IICC_MST == 1);				 //Wait till IIC is stopped
       I2C_Master_RecvBlock(&IIC_Rec_Data, 0x03, &rec_count);
       
       if (IICS_BUSY == 0)
       {    
         if (IIC_Rec_Data[2] == 0x01)//Examine Recieved data here 
         {
             //Turn on Alarm Indicator
             Alarm = 0x01;
         } else 
         {
            Alarm =0x00;
         }
      }  
   } 
}
/* END IIC_Master */
/*
** ###################################################################
**
**     This file was created by Processor Expert 3.07 [04.34]
**     for the Freescale HCS08 series of microcontrollers.
**
** ###################################################################
*/