tuner.h

此代码是LG tuner（模拟电视解调器）的51MCU驱动程序

#define T_WRSel	0
#define T_RDSel	1

//SHARP TUNER
/*
#define VHF_LOW_START		0x058a
#define VHF_LOW_FINISH		0x0cf2
#define VHF_HIGH_START		0x0d72
#define VHF_HIGH_FINISH	0x1e72
#define UHF_START			0x1ef2
#define UHF_FINISH			0x3862
*/

//LG TUNER
/*
#define VHF_LOW_START	0x058a
#define VHF_LOW_FINISH	0x07c4//0x0cf2
#define VHF_HIGH_START	0x0cf2//0x0d72
#define VHF_HIGH_FINISH	0x0ff3//0x1e72
#define UHF_START		0x1fe2//0x1ef2
#define UHF_FINISH		0x3863
*/

//XU GUANG TUNER 
#define TV_BAND_VL_LLIMIT	0x0694//  84.15(0x693)-4=80.15(0x643)0x0693
#define TV_BAND_VL_HLIMIT	0x0e72//184.9MHz
#define TV_BAND_VH_LLIMIT	0x0e72
#define TV_BAND_VH_HLIMIT	0x27ae//507.9MHz
#define TV_BAND_VU_LLIMIT	0x27ae
#define TV_BAND_VU_HLIMIT	0x464e//899.9MHz

#define VLF_BAND		0x01
#define VHF_BAND		0x02
#define UHF_BAND	0x04

#define C_CTRL_BYTE		0x88	//0x86


#define TV_MAXCH			20
#define TV_CH_VALID			0x10

#define TV_CHMASK_VALID	0x80	// 1=PB valid, default 0
#define TV_CHMASK_SKIP		0x40	// 1=ch skip, default 0
#define TV_CHMASK_NP		0x04	// 1=PAL, 0=NTSC, default is 0
#define TV_CHMASK_AUDIO	0x03	// two bits audio system, 00=M, 01=B/G, 10=I/I, 11=D/K
#define TV_CHDEF_AUDIO		0x02
#define TV_CHDEF_VIDEO		0x04

#define TV_CHDEF_STATE		0x87

#define 	SlvTuner		0xC0
#define	CH_IN_EAD		2

extern BYTE	data	PLL_Band;
extern WORD	data PB;
extern BIT	data	NOSign;
extern BYTE	data	TunerADC;
extern WORD	data H_Count;
extern WORD	data V_Count;

//extern BYTE 	data horizon;

extern void Write_PLL_IF(void);
extern void GetBand(WORD PLL);
extern void Write_PLL(BYTE band,WORD PLL);
extern void ManualSearch(BYTE Key_direction);
extern void AutoSearch(void);
extern void Forward_50KHZ(BYTE n);
extern void Back_50KHZ(BYTE n);
extern void HSYNC_Range(void);
extern void HSYNC_Range2(void);
extern void Tuner_ADC(void);
extern BYTE Tuner_AFC(void);
extern BIT VIF_Level(void);
extern void Get_HSYNC();
extern void Print_PLL(BYTE H_Start,BYTE C_Start,WORD pll);
extern void Print_CH(BYTE H_Start,BYTE C_Start,BYTE CH);
extern void DelayTuner(BYTE n);
extern void ClearHVflag(void);
extern void Initial_EEPROM_PLL(void);
extern void CH_PLUS(void);
extern void CH_SUB(void);
extern void PrintTunerBar(BYTE Cstart, BYTE Rstart);
extern void Get_CH(BYTE CH);
extern void SET_AUDIO(void);