i2c.#3

silabs USB c8051f321 ,DAB USB dongle的资料,已经可以量产的东西

#include <c8051f320.h>  
#include "usb_api.h"

sbit 	  SDA	=  P2^2 ;
sbit 	  SCL	=  P2^3 ;

#define   HIGH       1
#define   LOW        0

//int rda5800_reg_tab[45]={
code const rda5800_reg_tab[]={
0x0000,
0x0000,	
0xd881,	//0x02
//0x6300,
0x8e00, //101.7M
0x4400,	//0x04
0x06ff, //0x13ff, lilin, 06/22, 0x10f8, //0x05
0x0000,
0x00cd,
0x0096,
0x0020,
0x4163,
0x0806,
0x5800,
0x5800,
0x5800,
0x5800,
0x4c17,	//lilin, 08/13, seek_single step, 0x4817,
0x20a2,
0x0000,
0x000f,
0x06de,
0xecc0,
0x0200,
0x5383,
0x95a4,
0xe848,
0x0500,	//0x0500, lilin, 06/22, 0x0500,
0x00a4, //0x00a4, lilin, 06/22, 0x00a4,
0x889b,
0x0d84,
0x4f04,
0x8832,
0x7f71,
0x0660,
0x4010,
0x6002,
0x1808,
0x6458,
0x787f,
0x0100,
0xc040,
0xc020,
0x0024,
0x0400,
0x0020,//
};


void nop(unsigned int cnt)
{
	unsigned int i;
	for(i=0;i<cnt;i++);
}


void I2C_Start(void)
{
	SDA=HIGH;
	nop(1);
	SCL = HIGH;
	nop(4);
	SDA = LOW;
	nop(4);
	SCL = LOW;
	nop(1);
}



void I2C_Stop(void)
{
	SDA = LOW;
	nop(1);
	SCL = HIGH;
	nop(4);
	SDA = HIGH;
	nop(4);
}


void I2C_Write_Byte(unsigned char i2c_data)
{
   	unsigned char BitCnt;
	bit status;

   	for(BitCnt = 0; BitCnt < 8; BitCnt++)
   	{

		if(i2c_data &0x80)
			    SDA=1;
		else
		  		SDA=0;
   		i2c_data = i2c_data << 1;
		nop(4);
		SCL=HIGH;
		nop(4);
		SCL=LOW;
   	}
	SDA=LOW;
	nop(1);
	SCL = HIGH;
	nop(1);
	nop(1);
	status=SDA;
	SCL = LOW;
	nop(4);

}





unsigned char I2C_Read_Byte_ACK(void)		
{

	unsigned char BitCnt,i2c_data=0;

	for(BitCnt= 0; BitCnt < 8; BitCnt++)
	{

		i2c_data = i2c_data << 1;

		SDA=HIGH;
		nop(1);
		SCL=HIGH;	
		if(SDA==1)i2c_data++;
		nop(4);
		SCL=LOW;


	}

	SDA=LOW;//ack

	nop(1);
	SCL = HIGH;
	nop(4);
	SCL = LOW;
	nop(1);	
	
	return i2c_data;	

}

unsigned char I2C_Read_Byte_NAK(void)		
{
	unsigned char BitCnt,i2c_data=0;

	for(BitCnt= 0; BitCnt < 8; BitCnt++)
	{

		i2c_data = i2c_data << 1;
		SDA=HIGH;
		nop(1);
		SCL=HIGH;	
		if(SDA==1)i2c_data++;
		nop(4);
		SCL=LOW;


	}

	SDA=HIGH;//nak

	nop(1);
	SCL = HIGH;
	nop(4);
	SCL = LOW;
	nop(1);	
	
	return i2c_data;	

}



void Dab_Write_Register(int reg_addr,int reg_data)
{

	unsigned char ValueH,ValueL,dev_addr;

	I2C_Start();
	//device address
	dev_addr = 0xD6;       
	I2C_Write_Byte(dev_addr);


//write register address

	ValueL = (reg_addr & 0xFF);
	ValueH = ((reg_addr >> 8) & 0xFF);
	I2C_Write_Byte(ValueH);
	I2C_Write_Byte(ValueL);

//write register value
	ValueL = (reg_data & 0xFF);
	ValueH = ((reg_data >> 8) & 0xFF);
	I2C_Write_Byte(ValueH);
	I2C_Write_Byte(ValueL);

	I2C_Stop();



}



void Dab_Read_Register(int reg_addr,int *ptrdata)
{

	unsigned char ValueH,ValueL,dev_addr;
	//unsigned char i;
	

	I2C_Start();
	//device address
	dev_addr = 0xD6;  //write     
	I2C_Write_Byte(dev_addr);


//write register address

	ValueL = (reg_addr & 0xFF);
	ValueH = ((reg_addr >> 8) & 0xFF);
	I2C_Write_Byte(ValueH);
	I2C_Write_Byte(ValueL);

	I2C_Start();

	//device address
	dev_addr = 0xD7;  //read     
	I2C_Write_Byte(dev_addr);




	ValueH = I2C_Read_Byte_ACK();
	ValueL = I2C_Read_Byte_NAK();


	I2C_Stop();

	*ptrdata = (((int)ValueH) << 8) | ValueL;

}


//add FM part;

void DabFM_Write_Register( unsigned char reg_addr, int reg_data)
{

	unsigned char ValueH,ValueL,dev_addr;
	unsigned char i;
	
	if(reg_addr<2)  return;

	I2C_Start();
	//device address
	dev_addr = 0x20;       
	I2C_Write_Byte(dev_addr);

	for(i=2;i<reg_addr;i++)
	{
		ValueL = ((rda5800_reg_tab[i]) & 0xFF);
		ValueH = (((rda5800_reg_tab[i]) >> 8) & 0xFF);
		I2C_Write_Byte(ValueH);//high byte first
		I2C_Write_Byte(ValueL);
	}

	ValueL = (reg_data & 0xFF);
	ValueH = ((reg_data >> 8) & 0xFF);
	I2C_Write_Byte(ValueH);//high byte first
	I2C_Write_Byte(ValueL);

	I2C_Stop();

}



void DabFM_Read_Register( unsigned char reg_addr, int *ptrdata)
{

	unsigned char ValueH,ValueL,dev_addr;
	unsigned char i;
	unsigned int temp;

	I2C_Start();
	//device address
	dev_addr = 0x21;        
	I2C_Write_Byte(dev_addr);

	if(reg_addr<0x0a)	
	{
		for(i=0x0a;i<=0x3a;i++)
		{

			ValueH = I2C_Read_Byte_ACK();
			ValueL = I2C_Read_Byte_ACK();
			
		}

		for(i=0x00;i<reg_addr;i++)
		{

			ValueH = I2C_Read_Byte_ACK();
			ValueL = I2C_Read_Byte_ACK();

		}
	

	}

	if(reg_addr>0x0a)
	{
		for(i=0x0a;i<reg_addr;i++)
		{

			ValueH = I2C_Read_Byte_ACK();
			ValueL = I2C_Read_Byte_ACK();
			
		}

	}

	ValueH = I2C_Read_Byte_ACK();
	ValueL = I2C_Read_Byte_NAK();

	I2C_Stop();	
	*ptrdata = (((int)ValueH) << 8) | ValueL;


}


void DabFM_Init(void)
{
	int register_data; 

    DabFM_Write_Register(45,0x0020);

	Dab_Write_Register(0x2000,0x1234);

	Dab_Read_Register(0x2000,&register_data);



	DabFM_Read_Register(0x0a,&register_data);

	DabFM_Read_Register(0x0a,&register_data);

}