C/C++-Quelltext

ant=i2c_send(0x3C,0x2,0x0);
	if(ant!=0)
	{
		print_char(ant,10,"I2C cmd1 Error");
		led_blink();
	}
	ant=i2c_send(0x3C,0x3,0x2);
	if(ant!=0)
	{
		print_char(ant,10,"I2C cmd2 Error");
		led_blink();
	}
	if(i2c_send(0x3C,0x1E,0b00001000)!=0)//0x8
	{
		lcd_print(5,10,lcd_rgb(0xFF,0,0),0xFFFF,(unsigned char *)"Error Send i2c");
		led_blink();
	}

C/C++-Quelltext

#define I2C_DELAY 1000
#define I2C_DELAY_ON 20

void i2c_gpio_install(void)
{
	volatile avr32_pio_t *pioa = &AVR32_PIOA;
	
	//I2C***************************************************************
	pioa->per = I2C_PIN_MASK;//PIO Enable Register
	pioa->sodr = I2C_PIN_MASK;//I2C Data & Clk ON
	pioa->oer = I2C_PIN_MASK;//Output enable Register ODR
	
	//******************************************************************
	
}

char i2c_send(unsigned char device_adresse,unsigned char device_reg,unsigned char data)
{
	unsigned char i=0,dd=0x40;
	volatile avr32_pio_t *pioa = &AVR32_PIOA;
	char ret=0;
	
	
	
	
	
	pioa->codr = I2C_SDA_MASK;//Data Off
	udelay(I2C_DELAY_ON);
	pioa->codr = I2C_SCL_MASK;//Clock Off
	udelay(I2C_DELAY);

	//Send addresse
	dd=0x40;
	for (i=0;i<7;i++)
	{
		if(dd & device_adresse)
			pioa->sodr = I2C_SDA_MASK;// Set Output Data Register
		else
			pioa->codr = I2C_SDA_MASK;// Set Output Data Register

		pioa->sodr = I2C_SCL_MASK;// Clock On
		udelay(I2C_DELAY);//tHIGH
		pioa->codr = I2C_SCL_MASK;// Clock Off
		udelay(I2C_DELAY);//tLOW
		dd=(dd>>1);
	}
	//Bit Read/Write Read=>1 Write=>0
	pioa->codr = I2C_SDA_MASK;//Write SDA=1
	pioa->sodr = I2C_SCL_MASK;//Clock On
	udelay(I2C_DELAY);
	pioa->codr = I2C_SCL_MASK;//Clock Off
	udelay(I2C_DELAY);

	//ACK ->
	//Acknowledge: SDA line is low while the SCL line is high at the 9 th clock cycle
	pioa->sodr = I2C_SDA_MASK;//Data on
	pioa->odr = I2C_SDA_MASK;//Output disdable Register ODR
	pioa->sodr = I2C_SCL_MASK;//Colck On
	udelay(I2C_DELAY);
	if(pioa->pdsr & I2C_SDA_MASK)
	{
		pioa->oer=I2C_SDA_MASK;//Output enable DATA
		pioa->sodr = I2C_SCL_MASK;//Colck On
		udelay(I2C_DELAY_ON);
		pioa->sodr = I2C_SDA_MASK;//Data on
		return 1;
	}
	pioa->codr = I2C_SCL_MASK;//Clock Off
	pioa->oer=I2C_SDA_MASK;//Output enable DATA
	udelay(I2C_DELAY);


	//send Register auf dem Chip
	dd=0x80;
	for (i=0;i<8;i++)
	{
		if(dd & device_reg)
			pioa->sodr = I2C_SDA_MASK;//Data On
		else
			pioa->codr = I2C_SDA_MASK;//Data Off
		pioa->sodr = I2C_SCL_MASK;//Clock On
		udelay(I2C_DELAY);
		pioa->codr = I2C_SCL_MASK;//Clock Off
		udelay(I2C_DELAY);
		dd=(dd>>1);
	}
	
	//ACK ->i2c_send
	//Acknowledge: SDA line is low while the SCL line is high at the 9 th clock cycle
	pioa->sodr = I2C_SDA_MASK;//Data on
	pioa->odr = I2C_SDA_MASK;//Output disdable Register ODR
	pioa->sodr = I2C_SCL_MASK;//Colck On
	udelay(I2C_DELAY);
	if(pioa->pdsr & I2C_SDA_MASK)
	{
		pioa->oer=I2C_SDA_MASK;//Output enable DATA
		pioa->sodr = I2C_SCL_MASK;//Colck On
		udelay(I2C_DELAY_ON);
		pioa->sodr = I2C_SDA_MASK;//Data on
		return 2;
	}
	pioa->codr = I2C_SCL_MASK;//Clock Off
	pioa->oer=I2C_SDA_MASK;//Output enable DATA
	udelay(I2C_DELAY);

	//Daten senden
	dd=0x80;
	for (i=0;i<8;i++)
	{
		if(dd & data)
			pioa->sodr = I2C_SDA_MASK;//Data On
		else
			pioa->codr = I2C_SDA_MASK;//Data Off
		pioa->sodr = I2C_SCL_MASK;//Clock On
		udelay(I2C_DELAY);
		pioa->codr = I2C_SCL_MASK;//Clock Off
		udelay(I2C_DELAY);
		dd=(dd>>1);
	}

	
	//ACK ->
	//Acknowledge: SDA line is low while the SCL line is high at the 9 th clock cycle
	pioa->sodr = I2C_SDA_MASK;//Data on
	pioa->odr = I2C_SDA_MASK;//Output disdable Register ODR
	pioa->sodr = I2C_SCL_MASK;//Colck On
	udelay(I2C_DELAY);
	if(pioa->pdsr & I2C_SDA_MASK)
	{
		pioa->oer=I2C_SDA_MASK;//Output enable DATA
		pioa->sodr = I2C_SCL_MASK;//Colck On
		udelay(I2C_DELAY_ON);
		pioa->sodr = I2C_SDA_MASK;//Data on
		return 3;
	}
	pioa->codr = I2C_SCL_MASK;//Clock Off
	pioa->oer=I2C_SDA_MASK;//Output enable DATA
	udelay(I2C_DELAY);



ENDE:
	pioa->sodr = I2C_SCL_MASK;//Colck On
	udelay(I2C_DELAY_ON);
	pioa->sodr = I2C_SDA_MASK;//Data on
	return ret;

}







void i2c_scann_devices(void)
{
	unsigned char i=0,ii=0;
	char buffer[40];

	for (i=0;i<128;i++)
	{
		if(i2c_send(i,0,0)==0)
		{
			sprintf(buffer,"Device Found: 0x%x",i);
			lcd_print(5,120-(ii*10),lcd_rgb(0,0xFF,0),0xFFFF,(unsigned char *)buffer);
			ii++;
		}
	}
}