smbus_test.c

silicon 单片机C8051F320的I2C总线控制程序

#include <C8051F320.h>
#include "SMBus.h"


void Port_Init(void);


void main()
{ 
	unsigned char temp;
	unsigned char in_buff[4] = {1};              // Incoming data buffer
	unsigned char out_buff[4];

	unsigned char chaner1[4] = {0x00,0x00,0x00 , 0x03};
	unsigned char chaner2[4] = {0x00,0x00,0x00, 0x02};
	unsigned char chaner3[4] = {0x00,0x00,0x00 , 0x01};

	PCA0MD &= ~0x40;                    // WDTE = 0 (disable watchdog timer)

   	OSCICN |= 0x03;                     // Set internal oscillator to highest
                                       // setting of 12000000
	Port_Init();
	SMBus_Init ();                      // Configure and enable SMBus
	
	EEPROM_ReadArray(0x68,in_buff,0x02,4);		
  //  EEPROM_WriteArray(0xa0,0x00, out_buff,4);			
	temp=in_buff[3];
	while(temp);	

	out_buff[3]= chaner1[3];
	EEPROM_WriteArray(0x68,0x29,out_buff,4);			

	EEPROM_ReadArray(0x68,in_buff,0x02,4);		
	temp=in_buff[3];
	EEPROM_ReadArray(0x68,in_buff,0x29,4);		

	out_buff[3] = chaner2[3];
	EEPROM_WriteArray(0x68,0x29,out_buff,4);
	
	EEPROM_ReadArray(0x68,in_buff,0x02,4);		
	temp=in_buff[3];
	EEPROM_ReadArray(0x68,in_buff,0x29,4);		
				
	out_buff[3] = chaner3[3];
	EEPROM_WriteArray(0x68,0x29,out_buff,4);
				
	EEPROM_ReadArray(0x68,in_buff,0x02,4);		
	temp=in_buff[3];
	EEPROM_ReadArray(0x68,in_buff,0x29,4);		
			
	while(1)	
	{
		
	}

}


//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// Configure the Crossbar and GPIO ports.
//
// P0.0   digital   open-drain    SMBus SDA
// P0.1   digital   open-drain    SMBus SCL
//
// P2.2   digital   push-pull     LED
//
// all other port pins unused
//
// Note: If the SMBus is moved, the SCL and SDA sbit declarations must also
// be adjusted.
//
void PORT_Init (void)
{
   P0MDOUT = 0x00;                     // All P0 pins open-drain output

   P2MDOUT |= 0x04;                    // Make the LED (P2.2) a push-pull
                                       // output

   XBR0 = 0x04;                        // Enable SMBus pins
   XBR1 = 0x40;                        // Enable crossbar and weak pull-ups

   P0 = 0xFF;
}

//-----------------------------------------------------------------------------