lg252d.c

来自「DVB软件,基于CT216软件的开发源程序.」· C语言 代码 · 共 180 行

#include <string.h>
#include "ct_sys.h"
#include "ct_iic.h"
#include "ct_nim.h"
#include "LG252D.h"

//#define IIC_UART
#define TUNER_ADD   	0xC0
//static u8 szBuffer[8];
#if 0
#ifdef IIC_UART
/*******************************************************************************************/
bool8 Tuner_Write(u8 *pu8Buffer , u8 u8Length)
{
    if ((pu8Buffer == NULL)||
        (u8Length > MAX_IIC_BURST_LENGTH)||
        (u8Length==0))
    {        
        return FALSE;
    }

    if ( IIC2UART_Write(TUNER_ADD, *pu8Buffer, (pu8Buffer+1), (u8Length-1)) == FALSE )
	{		    
	    return FALSE;
	}
    return TRUE;
}
/*******************************************************************************************/
bool8 Tuner_Read(u8 *pu8Buffer, u8 u8Length)
{
    if ((pu8Buffer == NULL)||(u8Length > MAX_IIC_BURST_LENGTH))
    {
        return FALSE;
    }    
    
	if ( IIC2UART_Read(TUNER_ADD, 0, pu8Buffer, u8Length, FALSE) == FALSE )
	{
	    return FALSE;
	}

    return TRUE;
}
#else
/*******************************************************************************************/
bool8 Tuner_Write(u8 *pu8Buffer , u8 u8Length)
{
    u32 u32Handle;	
    
	if (CT_NIM_GetBus() == EN_CT_NIM_BUS_0)
	{
		if( CT_IIC_Open(EN_CT_IIC_BUS_0, TUNER_ADD, &u32Handle)!= DRV_OK)
		{		
			printf("\nCT_IIC_Open 0 Error");
	        return FALSE;
	    }
	}
	else
	{
		if( CT_IIC_Open(EN_CT_IIC_BUS_1, TUNER_ADD, &u32Handle)!= DRV_OK)
		{		
			printf("\nCT_IIC_Open 1 Error");
	        return FALSE;
	    }		
	}
#ifdef NIM_SW_IIC
	if(CT_SW_IIC_WriteData(u32Handle, pu8Buffer, u8Length) != DRV_OK )
#else
	if(CT_IIC_WriteData(u32Handle, pu8Buffer, u8Length) != DRV_OK )
#endif
	{		
		printf("\nCT_IIC_WriteData Error");
		CT_IIC_Close(u32Handle);
		return(FALSE);
	}
	
	CT_IIC_Close(u32Handle);
	return (TRUE);     
}
/*******************************************************************************************/
bool8 Tuner_Read(u8 *pu8Buffer, u8 u8Length)
{    
    u32 u32Handle;
		
	if (CT_NIM_GetBus() == EN_CT_NIM_BUS_0)
	{
		if( CT_IIC_Open(EN_CT_IIC_BUS_0, TUNER_ADD, &u32Handle)!= DRV_OK)
		{
			printf("\nR CT_IIC_Open 0 Error");
        	return FALSE;
        }
	}
	else
	{
		if( CT_IIC_Open(EN_CT_IIC_BUS_1, TUNER_ADD, &u32Handle)!= DRV_OK)
		{
			printf("\nR CT_IIC_Open 1 Error");
        	return FALSE;		
        }
	}

#ifdef NIM_SW_IIC
	if(CT_SW_IIC_ReadData(u32Handle, pu8Buffer, u8Length) != DRV_OK )
#else
	if(CT_IIC_ReadData(u32Handle, pu8Buffer, u8Length) != DRV_OK )
#endif
	{
		printf("\nR CT_IIC_ReadData Error");
		CT_IIC_Close(u32Handle);		
		return FALSE;
	}
	
	CT_IIC_Close(u32Handle);
	return (TRUE) ;
}
#endif
#endif
/*******************************************************************************
 * Program LG252D tuner
 *******************************************************************************/
bool8 CT221_ProgramTuner_LG252D(u32 RfFreq, u8 dwBWandFreqkHz)
{
	unsigned int N;
	u8 WriteBytes[5];
	float TunerFreq;
	u8    status;
	u8    TUNER_ID      = 0xc0;
	u8 ByteMask = 0xff;
	unsigned int NMask = 0x7fff;
	unsigned int ByteShift = 8;
	 
	TunerFreq = RfFreq / 1000.0;
	
	// Calculate divider N with step size = 166.67 kHz.
	N = (unsigned int)(TunerFreq * 6 + 217 + 0.5);
	N &= NMask;

	//printf("\n\r LG252D freq %ld", (u32)(TunerFreq * 1000));		

	// Set divider byte 1 and 2.
	//   - Note: Divider byte 1 is WriteBytes[0].
	//           Divider byte 2 is WriteBytes[1].
	WriteBytes[0] = N >> ByteShift & ByteMask;
	WriteBytes[1] = N & ByteMask;

	// Set control byte and band switch byte.
	//   - Note: Control byte is WriteBytes[2].
	//           Band switch byte is WriteBytes[3].
	if (TunerFreq >= 738)
	{
		WriteBytes[2] = 0xfc;
		WriteBytes[3] = 0x0c;
	}
	else if(TunerFreq >= 474)
	{
		WriteBytes[2] = 0xbc;
		WriteBytes[3] = 0x04|0x08;
	}
	else
	{
		WriteBytes[2] = 0xb4;
		WriteBytes[3] = 0x02;
	}	

	// Set auxiliary byte.
	//   - Note: Auxiliary byte is WriteBytes[4].
	WriteBytes[4] = 0x20;

	// Enable demod I2C repeating and send 5 bytes to tuner.
	/*CT226_Repeat(DEMOD_ADDR);
      if (!RegisterWrite2wb(TUNER_Addr, WriteBytes[0], &WriteBytes[1], 4))	
      {
      printf("\n\r write tuner fail");
      return FALSE;
      }*/

	status = Tuner_Write(&WriteBytes[0], 5);

	return TRUE; 	       
}