Mtk Android 之NvRAM customer

请尊重原创，转载请注明出处：http://blog.csdn.net/cbk861110/article/details/26851817

1.nvram lib id定义:

alps\mediatek\custom\prj\cgen\inc\Custom_NvRam_LID.h


typedef enum
{
    AP_CFG_RDCL_FILE_AUDIO_LID=AP_CFG_CUSTOM_BEGIN_LID,//AP_CFG_CUSTOM_BEGIN_LID: this lid must not be changed, it is reserved for system.

    AP_CFG_REEB_PRODUCT_INFO_LID,

    AP_CFG_CUSTOM_FILE_MAX_LID,
} CUSTOM_CFG_FILE_LID;

#define AP_CFG_REEB_PRODUCT_INFO_LID_VERNO      "000"

2.nvram lib id的数据结构和版本号声明
\alps\mediatek\custom\prj\cgen\inc\Custom_NvRam_data_item.h

LID_BIT VER_LID(AP_CFG_REEB_PRODUCT_INFO_LID)
PRODUCT_INFO *CFG_FILE_PRODUCT_INFO_TOTAL
{
};

3.4.nvram lib内容加入nvram数组中
\alps\mediatek\custom\prj\cgen\inc\CFG_file_info_custom.h
    const TCFG_FILE g_akCFG_File_Custom[]=
    {
        {
            "/data/nvram/APCFG/APRDEB/PRODUCT_INFO",       VER(AP_CFG_REEB_PRODUCT_INFO_LID),         CFG_FILE_PRODUCT_INFO_SIZE,
            CFG_FILE_PRODUCT_INFO_TOTAL,                   SIGNLE_DEFUALT_REC, (char *)&stPRODUCT_INFOConfigDefault,DataReset, NULL
        },
    };


4.nvram lib 数据结构定义
alps\mediatek\custom\prj\cgen\inc\CFG_file_info_custom.h


// the record structure define of PRODUCT_INFO nvram file
typedef struct
{
    unsigned char imei[8];
    unsigned char svn;
    unsigned char pad;
} nvram_ef_imei_imeisv_struct;


typedef struct{
unsigned char barcode[64];
nvram_ef_imei_imeisv_struct IMEI[4];
unsigned char reserved[1024-40-64];
}PRODUCT_INFO;


//the record size and number of PRODUCT_INFO nvram file
#define CFG_FILE_PRODUCT_INFO_SIZE    sizeof(PRODUCT_INFO)
#define CFG_FILE_PRODUCT_INFO_TOTAL   1


5.nvram lib 默认值定义
alps\mediatek\custom\prj\cgen\cfgdefault\CFG_PRODUCT_INFO_Default.h


PRODUCT_INFO stPRODUCT_INFOConfigDefault =
{
    /* barcode */
    {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
     0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0},
    /* IMEI*/
    {{0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0},0x0,0x0,
     {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0},0x0,0x0,
     {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0},0x0,0x0,
     {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0},0x0,0x0},
    /* reserved */


}


6.nvram lib id需要备份到BinRegion：
\alps\mediatek\custom\prj\cgen\CFG_file_info.c


FileName aBackupToBinRegion[]=
{

#ifndef MTK_PRODUCT_INFO_SUPPORT
{"PRODUCT_INFO",AP_CFG_REEB_PRODUCT_INFO_LID},
#endif

};

7.native(c)层读写:
[FAQ04545]【NvRAM】Native层读写nvram
     1，NVM_GetFileDesc(file_lid, &rec_size, &rec_num,true);//读打开
     2，read
     3，NVM_CloseFileDesc
     4，NVM_GetFileDesc(file_lid, &rec_size, &rec_num,false);//写打开
     5，write
     6，NVM_CloseFileDesc

8.java层读写：
参照[FAQ04542]【NvRAM】apk中中读写nvram

IBinder binder = ServiceManager.getService("NvRAMAgent");
NvRAMAgent agent = NvRAMAgent.Stub.asInterface(binder);

buffer = agent.readFile(AP_CFG_CUSTOM_FILE_LID_ID);
agent.writeFile(AP_CFG_CUSTOM_FILE_LID_ID,buffer);