tn_ctrl.c

电视高频头的程序,I2C控制,可以搜有线电视台,直接输出CVBS

/****************************************************************************
 *	Copyright (c) 2006 Yongqiang He    <[e-mail]> or <[e-mail]>
 *
 * Sponsored by DESAY A&V Science
 *
 * Filename:
 * ---------
 *    tn_ctrl.c
 *
 * Project:
 * --------
 *
 *
 * Description:
 * ------------
 *    Tuner basic control function
 *
 * Author:
 * -------
 *    YongQiang He
 *
 * Last changed: 		
 * -------------
 *
 * $Modtime: 2006-6-8 11:57
 *
 * $LastTime 
 *
 * $Revision: 1.0 $
 ****************************************************************************/

// *********************************************************************
// Constant table
// ********************************************************************* 
typedef struct structTunerType 
{
  /* DWRD 0 */
  BYTE fgNtscSupport; /* NTSC support */
  /* DWRD 1 */
  BYTE fgPalSupport;  /* PAL support */
  /* DWRD 2 */
  BYTE fgSecamSupport;  /* SECAM support */
  /* DWRD 3 */
  BYTE fgUseAB;       /* AB Byte programable */
  /* DWRD 4 */
  BYTE dwLockTime;    /* Tuner PLL lock timeout, in ms */
  /* DWRD 5 */
  BYTE bCB;           /* Control Byte */
  BYTE bBB;           /* Bandswitch Byte */
  BYTE bAB;           /* Auxiliary Byte */
  BYTE bBB_Low;       /* Bandswitch Byte for VHF_Low  */
  /* DWRD 6 */
  BYTE bBB_Mid;       /* Bandswitch Byte for VHF_High */
  BYTE bBB_High;      /* Bandswitch Byte for UHF      */
  WORD wLoBand_Min;   /* Low Band (Low) Freq unit MHz */
  /* DWRD 6 */
  WORD wLoBand_Max;   /* Low Band (High) Freq unit MHz */
  WORD wMiBand_Min;   /* Mid Band (MHigh) unit MHz */
  /* DWRD 7 */
  WORD wMiBand_Max;   /* Mid Band unit MHz */
  WORD wHiBand;       /* High Band unit MHz */
} strucTunerType; 

static const strucTunerType _prTuner =
{	
     FALSE,           /* NTSC support */
     TRUE,            /* PAL support */
     TRUE,           /* SECAM support */
     TRUE,            /* Use A Byte */
     80,              /* Tuner PLL lock timeout */
     0x8E,            /* C Byte */
     0x01,            /* B Byte (Band Low Defaulted) */
     0x50,            /* A Byte */
     0x01, 0x02, 0x04,/* Options for B Byte */
     0x0572,          /* Low Band (Min)  48.25*/
     0x0C4E,          /* Low Band (Max) 158.00*/
     0x0C4E,          /* Mid Band (Min) 158.00*/
     0x1F4E,          /* Mid Band (Max) 462.00*/
     0x3862          /* High Band      863.25*/  
};
     

typedef struct structCtrlCode 
{
  BYTE bCode0; /* B Data */
  BYTE bCode1; /* C Data */
  BYTE bCode2; /* E Data */
  BYTE Pad0;
} strcCtrlCode;
static const strcCtrlCode _prIfCtrlCode[TUNER_MODE_MAX] = {
  { 0x00, 0x00, 0x00, 0x00 }, /* 0: Not Use */
  { 0x16, 0x10, 0x44, 0x00 }, /* 1: TN_NTSC_M */
  { 0x16, 0x10, 0x44, 0x00 }, /* 2: TN_NTSC_N */
  { 0xd4, 0x70, 0x8d, 0x00 }, /* 3: TN_PAL_B_G */       
  { 0xd4, 0x70, 0x8e, 0x00 }, /* 4: TN_PAL_I */  
  { 0xd4, 0x70, 0x8f, 0x00 }, /* 5: TN_PAL_D_K */ 
  { 0xc4, 0x50, 0x8f, 0x00 }, /* 6: TN_SECAM_L */               
  { 0x86, 0x50, 0x53, 0x00 }, /* 7: TN_SECAM_L2 */
  { 0x00, 0x00, 0x00, 0x00 }, /* 8: TN_NTSC_J */
  { 0x20, 0x00, 0x00, 0x00 }, /* 9: TN_TV_AND_FM */
  { 0x0A, 0x90, 0x20, 0x00 }, /* A: TN_FM_STEREO */           
  { 0x0A, 0x30, 0x20, 0x00 }, /* B: TN_FM_MONO */             
  { 0x4A, 0x30, 0x20, 0x00 }, /* C: TN_FM_HIGH_SENSIBILITY */ 
  { 0x0A, 0x30, 0x20, 0x00 }  /* D: TN_FM_NORM_SENSIBILITY */
};