C++ (Cpp) CLK_ONの例

コード例 #1

ファイル: beam_gpio_i2c.c プロジェクト: dflow81/android_kernel_samsung_goyawifi

unsigned char beam_gpio_i2c_write( unsigned char ucAddress, unsigned char *pucData , int nLength )
{
	int i;
	unsigned int data_count=0;
	unsigned char bNack;
	unsigned char bRet=false;

	unsigned char ucBit;
	unsigned char ucData;

	ucAddress <<= 1;

		
	BEAM_SCL_OUTPUT(1);
	BEAM_SDA_OUTPUT(1);
		
	//---------------
	//	Start
	//---------------

	BEAM_SDA_LOW();
	BEAM_SCL_LOW();
	
	//---------------
	//	Slave Address
	//---------------

	for( ucBit=0x80;ucBit>0x01;ucBit>>=1 )
	{
		if( ucAddress & ucBit ) { BEAM_SDA_HIGH(); }
		else				    { BEAM_SDA_LOW();  }

		CLK_ON();

	}
	data_count++;

	//---------------
	//	Write bit
	//---------------

	BEAM_SDA_LOW();
	CLK_ON();

	
	//---------------
	//	ACK
	//---------------
	BEAM_SCL_HIGH();
	BEAM_SDA_INPUT();		
	bNack = BEAM_SDA_IS_HIGH();		
	BEAM_SCL_LOW();	//CLK_ON();

	
	if( bNack )
		goto BEAM_I2C_WRITE_FINISH;

	//----------------------------
	//	Writing DATA
	//----------------------------
		
	for( i=0; i<nLength; i++)
	{
		ucData = pucData[i];

		//----------------------------
		//	First bit & Check SCL hold
		//----------------------------

		if( ucData & 0x80 ) { BEAM_SDA_SET_OUTPUT(1); }
		else				{ BEAM_SDA_SET_OUTPUT(0);  }

#ifdef SCL_LOW_CHECK
		if( !BEAM_gpio_i2c_check_scl_hold() )
			goto BEAM_I2C_WRITE_FINISH;
#else
		BEAM_SCL_HIGH();
#endif
		BEAM_SCL_LOW();

		//----------------------------
		//	Last 7 bits
		//----------------------------

		for(ucBit=0x40;ucBit>0x00;ucBit>>=1)
		{
			if( ucData & ucBit) { BEAM_SDA_HIGH(); }
			else				{ BEAM_SDA_LOW();  }
			
			CLK_ON();

		}
		data_count++;

		//---------------
		//	ACK
		//---------------
		BEAM_SCL_HIGH();
		BEAM_SDA_INPUT();		
		bNack = BEAM_SDA_IS_HIGH();
		BEAM_SCL_LOW();	//	CLK_ON();

#ifdef FORCE_DELAY
		if((data_count%4==0) && need_check){
			if(data_count == 4)	mdelay(110);
			else 				udelay(120);
		}
#endif			
		if( bNack && i != (nLength-1) )
			goto BEAM_I2C_WRITE_FINISH;
	}

	//---------------
	//	STOP
	//---------------

	BEAM_SDA_SET_OUTPUT(0);
	
#ifdef SCL_LOW_CHECK
	if( ! beam_gpio_i2c_check_scl_hold() )
		goto BEAM_I2C_WRITE_FINISH;
#else
	BEAM_SCL_HIGH();
#endif
	BEAM_SDA_HIGH();

	bRet = true;

BEAM_I2C_WRITE_FINISH :

	if(!bRet)
	{
		BEAM_SCL_LOW();
		BEAM_SDA_LOW();

		BEAM_SCL_HIGH();
		BEAM_SDA_HIGH();
	}
	mdelay(1);	
	return bRet;
}

コード例 #2

ファイル: card_ll.c プロジェクト: roma-jam/scard

static void activation(ISO7816_SC* scard) {
    RST_LO();
    PWR_ON();
    CLK_ON();
}

コード例 #3

ファイル: beam_gpio_i2c.c プロジェクト: dflow81/android_kernel_samsung_goyawifi

unsigned char beam_gpio_i2c_read( unsigned char ucAddress, unsigned char *pucData, int nLength )
{
	int i;

	unsigned char  bNack;
	unsigned char  bRet=false;

	unsigned char  ucBit;
	unsigned char  ucData;

	ucAddress <<= 1;

	BEAM_SDA_OUTPUT(1);
	BEAM_SCL_OUTPUT(1);	

	//---------------
	//	Start
	//---------------

	BEAM_SDA_LOW();
	BEAM_SCL_LOW();
	
	//---------------
	//	Slave Address
	//---------------

	for( ucBit=0x80;ucBit>0x01;ucBit>>=1 )
	{
		if( ucAddress & ucBit ) { BEAM_SDA_HIGH(); }
		else				    { BEAM_SDA_LOW();  }

		CLK_ON();
	}

	//---------------
	//	Read bit
	//---------------

	BEAM_SDA_HIGH();
	CLK_ON();
	
	//---------------
	//	ACK
	//---------------

	BEAM_SCL_HIGH();
	BEAM_SDA_INPUT();		
	bNack = BEAM_SDA_IS_HIGH();
	BEAM_SCL_LOW();  //	CLK_ON();


	udelay(20);
	
	if( bNack )
		goto BEAM_I2C_READ_FINISH;

	//----------------------------
	//	Writing DATA
	//----------------------------
			
	for( i=0; i<nLength; i++)
	{
		ucData = 0;
		if(i>0) BEAM_SDA_INPUT();			

		//----------------------------
		//	First bit & Check SCL hold
		//----------------------------
		
#ifdef SCL_LOW_CHECK
		if( !beam_gpio_i2c_check_scl_hold() )
			goto BEAM_I2C_READ_FINISH;
#else
		BEAM_SCL_HIGH(); 
#endif
		if( BEAM_SDA_IS_HIGH() ) ucData = 0x80;
		BEAM_SCL_LOW();

		//----------------------------
		//	Last 7 bits
		//----------------------------

		for(ucBit=0x40;ucBit>0x00;ucBit>>=1)
		{

			BEAM_SCL_HIGH(); 
			if(BEAM_SDA_IS_HIGH()) ucData |= ucBit;
			BEAM_SCL_LOW();
		}

		//---------------
		//	ACK
		//---------------

		if( i == nLength-1 ) { BEAM_SDA_OUTPUT(1); }
		else				 { BEAM_SDA_OUTPUT(0);  } 
	
		CLK_ON();
		BEAM_SDA_HIGH();

		pucData[i] = ucData;
	}

	//---------------
	//	STOP
	//---------------

	BEAM_SDA_LOW();

#ifdef SCL_LOW_CHECK
	if( !beam_gpio_i2c_check_scl_hold() )
		goto BEAM_I2C_READ_FINISH;
#else
	BEAM_SCL_HIGH();
#endif
	BEAM_SDA_HIGH();
	

	bRet = true;

BEAM_I2C_READ_FINISH :

	if( !bRet)
	{
		BEAM_SCL_LOW();
		BEAM_SDA_LOW();

		BEAM_SCL_HIGH();
		BEAM_SDA_HIGH();
	}
	
	mdelay(1);	
	return bRet;
}