m52795.c

AV开关控制芯片M52795驱动源程序。用于车载LCD TV。实际系统中使用

/*******************************************************************************
**                            (c) Copyright 2004-2005, xujiajun
**                                    All Rights Reserved
**                                        V040723
**--------------文件信息--------------------------------------------------------
**创   建   人: 徐家俊
**创建日期: 2006年1月20日
**描        述:M52795驱动, call I2C function
**--------------版本修订历史----------------------------------------------------
** 修改人:徐家俊
** 版  本: V
** 日　期: 年月日
** 描　述:
**--------------当前版本修订----------------------------------------------------
** 修改人:徐家俊
** 版  本:
** 日　期:年月日
** 描　述:
**------------------------------------------------------------------------------
*******************************************************************************/
#define IN_M52795
#include"main.h"
/*-----------------------------------------------------------------------------*/
#define ADDR_M52795       0x90//0x92      //I2C写地址
/*-----------------------------------------------------------------------------*/
//define the two byte data for M52795
uchar idata M52795Data[2];

/********************************************************************************************************
 Descriptions:          SendDataTo52795
 input parameters:      None
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void SendDataTo52795(void)
{
    ISendStr(ADDR_M52795, M52795Data[0], &M52795Data[1], 1);
}
/********************************************************************************************************
 Descriptions:          SelectSW1OfM52795
 input parameters:      use defined switch orders
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void SelectSW1OfM52795(uchar VideoSelect, uchar AudioSelect, uchar VAmp)
{
    M52795Data[0] &= 0x30;
    M52795Data[0] |= VideoSelect;
    M52795Data[0] |= AudioSelect;
    M52795Data[0] |= VAmp;
    SendDataTo52795();
}
/********************************************************************************************************
 Descriptions:          SelectSW2OfM52795
 input parameters:      use defined switch orders
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void SelectSW2OfM52795(uchar VideoSelect, uchar AudioSelect, uchar VAmp)
{
    M52795Data[1] &= 0x30;
    M52795Data[1] |= VideoSelect;
    M52795Data[1] |= AudioSelect;
    M52795Data[1] |= VAmp;
    SendDataTo52795();
}
/********************************************************************************************************
 Descriptions:          Select all switches of M52795
 input parameters:      use defined switch orders
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            simon 2006.05.05
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void SelectAllSwOfM52795(uchar VideoSelect, uchar AudioSelect, uchar VAmp)
{
    M52795Data[0] &= 0x30;
    M52795Data[0] |= VideoSelect;
    M52795Data[0] |= AudioSelect;
    M52795Data[0] |= VAmp;
    M52795Data[1] &= 0x30;
    M52795Data[1] |= VideoSelect;
    M52795Data[1] |= AudioSelect;
    M52795Data[1] |= VAmp;
    SendDataTo52795();
}
/********************************************************************************************************
 Descriptions:          Set M52795 two switchs mute
 input parameters:      use defined switch orders
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void M52795Mute(void)
{
    SelectSW1OfM52795(VIDEO_1,AUDIO_MUTE,V_AMP_0DB);
    SelectSW2OfM52795(VIDEO_1,AUDIO_MUTE,V_AMP_0DB);
}
/********************************************************************************************************
 Descriptions:          Set the I/O of M52795
 input parameters:      Data: D3=D5;D2=D4;D1=DD;D0=DC; high 4 bits are ignored.
 Returned value:        None
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
void SetIOM52795(uchar Data)
{
    uchar temp;

    Data &= 0x0f;
    temp = Data;
    temp <<= 2;
    temp &= 0x30;
    M52795Data[0] |= temp;
    temp = Data;
    temp <<= 4;
    temp &= 0x30;
    M52795Data[1] |= temp;
    SendDataTo52795();
}
/********************************************************************************************************
 Descriptions:          Get the I/O of M52795
 input parameters:      None
 Returned value:        D3=D5;D2=D4;D1=DD;D0=DC; high 4 bits are ignored.
 Used global variables: None
 Calling modules:       None
 Created by:            xjj 2006/01/20
-------------------------------------------------------------------------------------------------------
 Modified by:
********************************************************************************************************/
/*
uchar GetIOM52795(void)
{
    uchar temp = 0;

    temp = M52795Data[0];
    temp >>= 2;
    temp &= 0x0c;
    temp |= ((M52795Data[1]&0x30)>>4) ;
    return temp;
}
*/