linux内核中，对读取文件的使用

来源：互联网发布：手机淘宝客户端官网编辑：程序博客网时间：2024/06/10 17:14

由于内核中没有对应用编程中对文件的打开读写操作的函数，下面介绍一种方式来使得内核中可以对某个文件进行读写：

定义一个静态常量数组，如下：

static const UInt8 gVps_tvp5158Patch[] = {
#include "vpsdrv_tvp5158Patch_v2_03_02.h"
};

再对整个数组中变量进行操作：

Int32 Vps_tvp5158PatchDownload ( Vps_Tvp5158Obj * pObj, UInt32 devId )
{
Int32 status = FVID2_SOK;
static UInt8 regAddr[256];
UInt8 vbusStatus;
UInt32 wrSize;
UInt8 *patchAddr;
UInt32 patchSize;
Vps_VideoDecoderCreateParams *pCreateArgs;

pCreateArgs = &pObj->createArgs;

patchAddr = ( UInt8 * ) gVps_tvp5158Patch;
patchSize = sizeof ( gVps_tvp5158Patch );

.............

wrSize = sizeof ( regAddr );

while ( patchSize)
{

.......................
status = Vps_deviceWrite8 ( pCreateArgs->deviceI2cInstId,
pCreateArgs->deviceI2cAddr[devId],
regAddr, patchAddr, wrSize );

}

..........................

}