deviceio.c

Keil 8051 C example RS232 to I2c

#include <at89x52.H>              // SFR definition header file
#include <stdio.h>                 // prototype declarations for I/O functions
#include "SystemEvent.h"
 
#include "ExtVar.h"
 
#include <intrins.h>
#include "function.h" 
#include "RTOS.h" 
 
 
#define set_sda(bDat)	{ Pin_SDA1 = bDat;  Pin_SDA1 = bDat;}
#define set_sda_input	{ Pin_SDA1 = HIGH; _xHost|=0x30; *_EN_Host=_xHost; }
#define set_sda_output	{ Pin_SDA1 = HIGH; _xHost&=0xcf; *_EN_Host=_xHost;}

void SetupI2CIDCode(unsigned int _XADR){  
	_AdrxOfI2C=_XADR&0x00ff;
   _IDCodeOfI2C=(_XADR>>8)&0x00ff;  
}

void EchoToHost(void){			 
	ES=0;
	TI=0;
   SBUF=0xa5; 
	while(TI==0);  
	TI=0;	 
	ES=1;
}     

void ReadFunc(void){
	SetupI2CIDCode(_AdrX); 
   switch(_IDCodeOfI2C){
		default:	 
		i2c_read(0xa0,_AdrxOfI2C,_Length,_PtrI2c);  	
		break; 
	}					
 	_sda=1; 	_xbit=_sda;
	_sclk=1;    _xbit=_sclk; 
 
} 
 
void WriteFunc(void){ 
   SetupI2CIDCode(_AdrX);
   switch(_IDCodeOfI2C){
	default:  
		i2c_write(0xa0,_AdrxOfI2C,_Length,_WPtrI2c);
		break; 
	}	
	_sda=1; 	_xbit=_sda;
	_sclk=1;    _xbit=_sclk;  
}