at24c02.c

pt2313和pt2258的控制程序,里面包含了声道转换,

/*
*****************************************************************************
*					Mountain View Silicon Tech. Inc.
*	Copyright 2007, Mountain View Silicon Tech. Inc., ShangHai, China
*					All rights reserved.
*
* Filename:			at24c02.c
* Description:		at24c02 eeprom control c file
*
* Change History:
*			Jack	- 12/xx/2007 - V0.1
*					- created
******************************************************************************
*/
/*
**********************************************************
*					INCLUDE
**********************************************************
*/
#include <reg51.h>

#include "type.h"
#include "utility.h"
#include "AT24C02.h"
#include ".\addon\addon_cfg.h"
#include ".\config\syscfg.h"
#include "sysctrl.h"




/*
**********************************************************
*					LOCAL MACRO
**********************************************************
*/
#if 0
/*define pin operate macro*/
#define SET_PIN(reg, mask)		((reg) |= (mask))			//pin = 1
#define	CLR_PIN(reg, mask)		((reg) &= (~(mask)))		//pin = 0
#define GET_PIN(reg, mask)		((reg) & (mask))			//get pin status
#endif


sbit	SCL = P0^1;
sbit	SDA = P0^0;


/* declare ack type */
#define	NO_ACK		1
#define ACK			0

/*set SCL rate: 100Kbps~400Kbps*/
#define I2C_TIME	5				//EX51 -> 100 us/bit
									//I51 -> 10 us/bit



/*
**********************************************************
*					LOCAL FUNCTION
**********************************************************
*/
//
// I2C start condition: SCL = 1, SDA 1->0.
//
extern void 
I2CStart(void)
{
	SDA = 1; 
    WaitUs(I2C_TIME);	
    SCL = 1; 
    WaitUs(I2C_TIME);								//约等于48uS / 12 = 4uS
    SDA = 0; 
    WaitUs(I2C_TIME);
    SCL = 0;
	WaitUs(0);
}


//
// I2C stop condition: SCL = 1, SDA  0->1.
//
extern void 
I2CStop(void)
{
     SDA = 0; 
     //SCL = 0;
     WaitUs(I2C_TIME);
     SCL = 1;
     WaitUs(I2C_TIME);
     SDA = 1;
     //WaitUs(I2C_TIME);
}


//
// I2C ack
//
extern void 
I2CAckType(
	bit	ackType											//if == 1, then SDA = 1, means I2C send NO ACK.
														//if == 0, then SDA = 0, means I2C send ACK.
	)
{
	if (ackType)
	{
		SDA = 1;								//send NO ACK
	}
	else
	{
		SDA = 0;								//send ACK
	}
	WaitUs(I2C_TIME);
	SCL = 1;
    WaitUs(I2C_TIME);
	SCL = 0;
	WaitUs(0);
	//SDA = 1;
}


//
// I2C check ack from master
//
#if 1
extern bit												//if error return 1, else return 0
I2CChkAck(void)
{
	unsigned int	errtime = 1000;						//超时值,因故障接收方无ACK

	WaitUs(I2C_TIME);

    SCL = 1;
	SDA = 1;	
	if(SDA){};
//	while(SDA)
//	{
//		if (--errtime == 0) 
//		{
//			I2CStop();
//			return 1;
//		}
//	}
	WaitUs(I2C_TIME);
	WaitUs(I2C_TIME);
 	SCL = 0;
	WaitUs(0);
	return 0;
}
#endif

//
// I2C write 8 bits to device
//
extern bit 												//if error return 1, else return 0
I2CWrite8Bit(
	unsigned char b										//data to write into device
	)
{
	unsigned char temp;
	 
	for(temp=8; temp!=0; temp--)
	{
		if(b & 0x80)									//MSB output first
		{
		  	SDA = 1;
		}
		else
		{
			SDA = 0;
		}
		WaitUs(I2C_TIME);
		SCL = 1;
		WaitUs(I2C_TIME);
		b = b << 1;
		SCL = 0;
	 	WaitUs(0);
	}
	return I2CChkAck();
//	WaitUs(I2C_TIME);
//	SCL = 1;
//	SDA = 1;

//	WaitUs(I2C_TIME);
//	SCL = 0;
//	WaitUs(I2C_TIME);
}


//
// I2C read 8 bits from device
//
extern unsigned char 									//return data, read from device
I2CRead8Bit(void)
{
	unsigned char	temp, rbyte = 0;
	 
	for(temp=8; temp!=0; temp--) 
	{	
		WaitUs(I2C_TIME);
		SDA = 1;
	  	SCL = 1;
		rbyte <<= 1;
		if(SDA)
		{
		  	rbyte |= 0x01;
		}
		WaitUs(I2C_TIME);
		SCL = 0;
	 }
	 WaitUs(0);
     return(rbyte);
}

extern void
I2CSendByte(unsigned char dev, unsigned char thedat)
{
     I2CStart();
     I2CWrite8Bit(dev);
     I2CWrite8Bit(thedat);
     I2CStop();
//	 WaitUs(100);
}
extern void
I2cSend2Byte(unsigned char thedat1, unsigned char thedat2)	// 1,10
{
     I2CStart();
	 I2CWrite8Bit(0x88);
     I2CWrite8Bit(thedat2);
     I2CWrite8Bit(thedat1);
     I2CStop();
//	 WaitUs(100);
}
extern void
I2cSend2ByteSub(unsigned char thedat1, unsigned char thedat2)	//10,1
{
     I2CStart();
	 I2CWrite8Bit(0x88);
     I2CWrite8Bit(thedat1);
     I2CWrite8Bit(thedat2);
     I2CStop();
//	 WaitUs(100);
}

extern void PT2323Sel(char sel)//SEL 0=DVD ;1=CD;2 = USB
{
	if(sel == 0)	//dvd	5.1
	{
		I2CSendByte(0x94,0xc7);	//sel 6 input
	}
	else if(sel == 1)	//cd
	{
		I2CSendByte(0x94,0xca);	//input2
	}
	else if(sel == 2)	//usb
	{
		I2CSendByte(0x94,0xc8);	//input4
	}
}
extern void PT2323Change5(char on)	// 1=5.1;0=2.1
{
	if(on)
	{
		I2CSendByte(0x94,0xf0);	//fl
		I2CSendByte(0x94,0xf2);	//fr
		I2CSendByte(0x94,0xf4);	//ct
		I2CSendByte(0x94,0xf6);	//sub
		I2CSendByte(0x94,0xf8);	//sl
		I2CSendByte(0x94,0xfa);	//sr		
		I2CSendByte(0x94,0xfe);	//all
	}
	else
	{
		I2CSendByte(0x94,0xf0);	//fl
		I2CSendByte(0x94,0xf2);	//fr
		I2CSendByte(0x94,0xf5);	//ct
		I2CSendByte(0x94,0xf6);	//sub
		I2CSendByte(0x94,0xf9);	//sl
		I2CSendByte(0x94,0xfb);	//sr		
//		I2CSendByte(0x94,0xfe);	//all
	}

}
extern void PT2323Mute(char on)	// 1=mute
{
	if(on)I2CSendByte(0x94,0xff);	//all
	else
	{
		if(VolMain != 0)	
		I2CSendByte(0x94,0xfe);	//all
	}

}



extern void VolRearSet(BYTE dir)// 0 -10
{
	unsigned char temp1,temp2,out;
//	out = 79-(VolMain+VolRear);	//(0-60)+(0-10)-5
//	out = 50-VolRear*3;	//(0-60)+(0-10)-5	
	out = 70-(VolMain+VolRear);	//(0-60)+(0-10)-5	
	temp1 = 0x40|(out/10);
	temp2 = 0x50|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//sl
	else
		I2cSend2ByteSub(temp1,temp2);		
	temp1 = 0x00|(out/10);
	temp2 = 0x10|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//sr
	else
		I2cSend2ByteSub(temp1,temp2);		
}

extern void VolRearSub(void)
{
	unsigned char temp1,temp2,out;

	if(VolRear >0)
	{
		VolRear--;
//		out = 50-VolRear*3;	//(0-60)+(0-10)-5	
	out = 70-(VolMain+VolRear);	//(0-60)+(0-10)-5		
		temp1 = 0x40|(out/10);
		temp2 = 0x50|(out%10);
		I2cSend2ByteSub(temp1,temp2);		//sl
		temp1 = 0x00|(out/10);
		temp2 = 0x10|(out%10);
		I2cSend2ByteSub(temp1,temp2);		//sr	
	}
}
extern void VolRearAdd(void)
{
	unsigned char temp1,temp2,out;
	if(VolRear <10)
	{
		VolRear++;
//		out = 50-VolRear*3;	//(0-60)+(0-10)-5		
	out = 70-(VolMain+VolRear);	//(0-60)+(0-10)-5		
		temp1 = 0x40|(out/10);
		temp2 = 0x50|(out%10);
		I2cSend2Byte(temp1,temp2);		//sl
		temp1 = 0x00|(out/10);
		temp2 = 0x10|(out%10);
		I2cSend2Byte(temp1,temp2);		//sr			
	}
}

extern void VolCenSet(BYTE dir) // 0-10
{
	unsigned char temp1,temp2,out;
//	out = 50-VolCen*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolCen);	//(0-60)+(0-10)-5		
	temp1 = 0x20|(out/10);
	temp2 = 0x30|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//cen
		else
		I2cSend2ByteSub(temp1,temp2);	
}
extern void VolCenSub(void)
{
	unsigned char temp1,temp2,out;
	if(VolCen >0)
	{
	VolCen--;
//	out = 50-VolCen*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolCen);	//(0-60)+(0-10)-5		
	temp1 = 0x20|(out/10);
	temp2 = 0x30|(out%10);
	I2cSend2ByteSub(temp1,temp2);		//cen		
	}
}
extern void VolCenAdd(void)
{
	unsigned char temp1,temp2,out;
	if(VolCen < 10)
	{
		VolCen++;
//	out = 50-VolCen*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolCen);	//(0-60)+(0-10)-5		
	temp1 = 0x20|(out/10);
	temp2 = 0x30|(out%10);
	I2cSend2Byte(temp1,temp2);		//cen		
	}
}
extern void VolFrontSet(BYTE dir) // 0-10
{
	unsigned char temp1,temp2,out;
//	out = 50-VolFront*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolFront);	//(0-60)+(0-10)-5		
	temp1 = 0x60|(out/10);
	temp2 = 0x70|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//fl
	else
		I2cSend2ByteSub(temp1,temp2);		
	temp1 = 0xa0|(out/10);
	temp2 = 0xb0|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//fr
	else
		I2cSend2ByteSub(temp1,temp2);		
}
extern void VolFrontSub(void)
{
	unsigned char temp1,temp2,out;
	if(VolFront > 0)
	{
	VolFront--;
//	out = 50-VolFront*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolFront);	//(0-60)+(0-10)-5	
	
	temp1 = 0x60|(out/10);
	temp2 = 0x70|(out%10);
	I2cSend2ByteSub(temp1,temp2);		//fl
	temp1 = 0xa0|(out/10);
	temp2 = 0xb0|(out%10);
	I2cSend2ByteSub(temp1,temp2);		//fr		

	}
}
extern void VolFrontAdd(void)
{
	unsigned char temp1,temp2,out;
	if(VolFront < 10)
	{
		VolFront++;
//	out = 50-VolFront*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolFront);	//(0-60)+(0-10)-5	
	
	temp1 = 0x60|(out/10);
	temp2 = 0x70|(out%10);
	I2cSend2Byte(temp1,temp2);		//fl
	temp1 = 0xa0|(out/10);
	temp2 = 0xb0|(out%10);
	I2cSend2Byte(temp1,temp2);		//fr		

	}


}

extern void VolSubSet(BYTE dir) // 0-10
{
	unsigned char temp1,temp2,out;
//	out = 50-VolSub*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolSub);	//(0-60)+(0-10)-5		
	temp1 = 0x80|(out/10);
	temp2 = 0x90|(out%10);
	if(dir)
	I2cSend2Byte(temp1,temp2);		//cen
	else
		I2cSend2ByteSub(temp1,temp2);		
		
}

extern void VolSubSub(void)
{
	unsigned char temp1,temp2,out;
	if(VolSub > 0)
	{
		VolSub--;
//	out = 50-VolSub*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolSub);	//(0-60)+(0-10)-5	
	
		temp1 = 0x80|(out/10);
		temp2 = 0x90|(out%10);
		I2cSend2ByteSub(temp1,temp2);		//cen		
		
	}

}
extern void VolSubAdd(void)
{
	unsigned char temp1,temp2,out;
	if(VolSub < 10)
	{
		VolSub++;
//	out = 50-VolSub*3;	//(0-60)+(0-10)-5
	out = 70-(VolMain+VolSub);	//(0-60)+(0-10)-5	
	
		temp1 = 0x80|(out/10);
		temp2 = 0x90|(out%10);
		I2cSend2Byte(temp1,temp2);		//cen		
		
	}

}


extern void VolMainSet(void)	//0-60
{

	unsigned char temp1,temp2,out;

//	VolRearSet();
//	VolSubSet();
//	VolFrontSet();	
//	VolCenSet();

	
	out = 65-VolMain;	//(0-60)+(0-10)-5
	
	temp1 = 0xd0+(out/10);
	temp2 = 0xe0+(out%10);
	I2cSend2Byte(temp1,temp2);		//fl
}

extern void VolMainSub(void)
{
	unsigned char temp1,temp2,out;
	if(VolMain > 1)
	{
		VolMain--;
		out = 65-VolMain;	//(0-60)+(0-10)-5
	
		temp1 = 0xd0+(out/10);
		temp2 = 0xe0+(out%10);
		I2cSend2ByteSub(temp1,temp2);		//fl		
	}
	else if(VolMain == 1)
	{
		VolMain--;
		PT2323Mute(1);	//pt2323 mute off
		VolSetMute(1);	//pt2258 mute off		
	}
	if(VolFront > 5) VolFrontSet(1);
		else if(VolFront < 5) VolFrontSet(0);
	if(VolRear > 5) VolRearSet(1);
		else if(VolRear < 5) VolRearSet(0);
	if(VolCen > 5) VolCenSet(1);
		else if(VolCen < 5) VolCenSet(0);
	if(VolSub > 5) VolSubSet(1);
		else if(VolSub < 5) VolSubSet(0);		

}
extern void VolMainAdd(void)
{
	unsigned char temp1,temp2,out;
	if(VolMain == 0)
	{
		VolMain++;
		PT2323Mute(0);	//pt2323 mute off
		VolSetMute(0);	//pt2258 mute off	
	}
	else if(VolMain < 60)
	{
		VolMain++;
		out = 65-VolMain;	//(0-60)+(0-10)-5
	
		temp1 = 0xd0+(out/10);
		temp2 = 0xe0+(out%10);
		I2cSend2Byte(temp1,temp2);		//fl		
	}
	if(VolFront > 5) VolFrontSet(1);
		else if(VolFront < 5) VolFrontSet(0);
	if(VolRear > 5) VolRearSet(1);
		else if(VolRear < 5) VolRearSet(0);
	if(VolCen > 5) VolCenSet(1);
		else if(VolCen < 5) VolCenSet(0);
	if(VolSub > 5) VolSubSet(1);
		else if(VolSub < 5) VolSubSet(0);
}
extern void VolInit(void)
{
	I2CSendByte(0x88,0xc0);	//no mean
}

extern void VolSetMute(char on)
{
	if(on)I2CSendByte(0x88,0xf9);	//mute on
	else 
	{
		if(VolMain != 0)	
		I2CSendByte(0x88,0xf8);
	}

}