lc72131.c

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#include <reg52.h>
#include <absacc.h>
#include <intrins.h>
#include "baCommon.h"
#include "resource.h"
#include "lc72131.h"

void outByte(U8 b)
{
	U8 i;
	for(i=8;i>0;i--)
	{
		PIN_lc72131_clk=0;
		PIN_lc72131_di=(b&0x80);
		b=(b<<1);
		PIN_lc72131_clk=1;
	}
}

U8 inByte()
{
	U8 i,b=0;
	U8 x=0x80;
	for(i=8;i>0;i--)
	{
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		PIN_lc72131_clk=1;
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		PIN_lc72131_clk=0;
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		_nop_();
		PIN_lc72131_clk=1;
		PIN_lc72131_do=1;
		if(PIN_lc72131_do)
			b|=x;
		x>>=1;
	}
	return b;
}

void sendMode1(U8 loByte, U8 hiByte, U8 mode)
{
	PIN_lc72131_ce=0;
	outByte(PLL_IN1);
	PIN_lc72131_ce=1;
	outByte(loByte);
	outByte(hiByte);
	//outByte(PLL_IN1_FMIN|PLL_IN1_CTERESET|PLL_IN1_XS72M|PLL_IN1_RF25K1);
	outByte(mode);
}

void sendMode2(U8 b)
{
	PIN_lc72131_ce=0;
	outByte(PLL_IN2);
	PIN_lc72131_ce=1;
	outByte(b);
	outByte(0xAC);
	outByte(0xC8);
	PIN_lc72131_ce=0;
}

#if 1
U32 PLLReadData()
{
	union{
		U32 count;
		struct{
			U8 a[4];
		}a;
	}ifcount;

	PIN_lc72131_ce=0;
	outByte(PLL_OUT);
	PIN_lc72131_ce=1;
	_nop_();
	_nop_();

	ifcount.count=0;
	ifcount.a.a[0]=0;
	ifcount.a.a[1]=inByte();
	ifcount.a.a[2]=inByte();
	ifcount.a.a[3]=inByte();

	PIN_lc72131_ce=0;

	/* again */

	PIN_lc72131_ce=0;
	outByte(PLL_OUT);
	PIN_lc72131_ce=1;
	_nop_();
	_nop_();

	ifcount.count=0;
	ifcount.a.a[0]=0;
	ifcount.a.a[1]=inByte();
	ifcount.a.a[2]=inByte();
	ifcount.a.a[3]=inByte();

	PIN_lc72131_ce=0;




	return(ifcount.count&0x000fffff);
}
#endif

void PLLSetStation(U8 band, U8 f1, U8 f2, U8 mode, bit mute)
{
	band=band;
	sendMode1(f1,f2,mode);
	if(!mute)
		sendMode2(0x51);
	else
		sendMode2(0x50);
}

#if 0
U32 PLLStepSearch(bit direction, U16 freq)
{
	UNUSED(direction);
	UNUSED(freq);
	return 0;
}
#endif

/*  */
U16 dataReverse(U16 x)
{
	U16 b;
	U8 a;
	for(a=0;a<16;a++)
	{
		b=(x&0x0001)?((b<<1)+1):(b<<1);
		x=x>>1;
	}
	return(b);
}

#if 0
void main(void)
{
	U32 ret;

	PIN_tuner_switch=0;

	while(1)
	{
		PIN_lc72131_ce=0;
		outByte(PLL_IN1);
		PIN_lc72131_ce=1;
		
		outByte(0xE1);
		outByte(0x10);
		outByte(0xD4);
		
		PIN_lc72131_ce=0;
		outByte(PLL_IN2);
		PIN_lc72131_ce=1;
		
		outByte(0x50);
		outByte(0xac);
		outByte(0xc8);
		PIN_lc72131_ce=0;

		ret=PLLReadData();



		PIN_lc72131_ce=0;
		outByte(PLL_IN1);
		PIN_lc72131_ce=1;
		outByte(0xE1);
		outByte(0x10);
		outByte(0xF4);

		PIN_lc72131_ce=0;
		outByte(PLL_IN2);
		PIN_lc72131_ce=1;
		outByte(0x50);
		outByte(0xac);
		outByte(0xc8);
		PIN_lc72131_ce=0;

		ret=PLLReadData();
	}

}
#endif