/* fs_Open flags -------------- */ /* mode */ #define SL_FS_CREATE ((_u32)0x1<<(SL_NUM_OF_MAXSIZE_BIT+SL_NUM_OF_FLAGS_BIT)) #define SL_FS_WRITE ((_u32)0x2<<(SL_NUM_OF_MAXSIZE_BIT+SL_NUM_OF_FLAGS_BIT)) #define SL_FS_OVERWRITE ((_u32)0x4<<(SL_NUM_OF_MAXSIZE_BIT+SL_NUM_OF_FLAGS_BIT)) #define SL_FS_READ ((_u32)0x8<<(SL_NUM_OF_MAXSIZE_BIT+SL_NUM_OF_FLAGS_BIT)) /* creation flags */ #define SL_FS_CREATE_FAILSAFE ((_u32)0x1<<SL_NUM_OF_MAXSIZE_BIT) /* Fail safe */ #define SL_FS_CREATE_SECURE ((_u32)0x2<<SL_NUM_OF_MAXSIZE_BIT) /* SECURE */ #define SL_FS_CREATE_NOSIGNATURE ((_u32)0x4<<SL_NUM_OF_MAXSIZE_BIT) /* Relevant to secure file only */ #define SL_FS_CREATE_STATIC_TOKEN ((_u32)0x8<<SL_NUM_OF_MAXSIZE_BIT) /* Relevant to secure file only */ #define SL_FS_CREATE_VENDOR_TOKEN ((_u32)0x10<<SL_NUM_OF_MAXSIZE_BIT) /* Relevant to secure file only */ #define SL_FS_CREATE_PUBLIC_WRITE ((_u32)0x20<<SL_NUM_OF_MAXSIZE_BIT) /* Relevant to secure file only, the file can be opened for write without Token */ #define SL_FS_CREATE_PUBLIC_READ ((_u32)0x40<<SL_NUM_OF_MAXSIZE_BIT) /* Relevant to secure file only, the file can be opened for read without Token */ #define SL_FS_CREATE_MAX_SIZE( MaxFileSize ) ((((_u32)MaxFileSize + 255) / 256 ) & SL_FS_OPEN_MAXSIZE_BIT_MASK ) /* write flags */ #define SL_FS_WRITE_MUST_COMMIT ((_u32)0x80<<SL_NUM_OF_MAXSIZE_BIT) /* The file is locked for changes */ #define SL_FS_WRITE_BUNDLE_FILE ((_u32)0x100<<SL_NUM_OF_MAXSIZE_BIT) /* The file is locked for changes as part of Bundle */ #define SL_FS_WRITE_ENCRYPTED ((_u32)0x200<<SL_NUM_OF_MAXSIZE_BIT) /* This indicates the start of a secured content write session */
什么意思 为什么这段带么执行后，
DeviceFileHandle = sl_FsOpen(unsigned char *)DeviceFileName,
SL_FS_READ,
&MasterToken);
Offset = 0;
RetVal = sl_FsRead( DeviceFileHandle, Offset, (unsigned char *)InputBuffer, strlen("HelloWorld"));
RetVal = sl_FsClose(DeviceFileHandle, NULL, NULL , 0);
打不开
char* DeviceFileName = "MyFile.txt";
unsigned long MaxSize = 63 * 1024; //62.5K is max file size
long DeviceFileHandle = -1;
_i32 RetVal; //negative retval is an error
unsigned long Offset = 0;
unsigned char InputBuffer[100];
_u32 MasterToken = 0;
// Create a file and write data. The file in this example is secured, without signature and with a fail safe commit
//create a secure file if not exists and open it for write.
DeviceFileHandle = sl_FsOpen(unsigned char *)DeviceFileName,
SL_FS_CREATE|SL_FS_OVERWRITE | SL_FS_CREATE_SECURE | SL_FS_CREATE_NOSIGNATURE | SL_FS_CREATE_MAX_SIZE( MaxSize ),
&MasterToken);
Offset = 0;
//Preferred in secure file that the Offset and the length will be aligned to 16 bytes.
RetVal = sl_FsWrite( DeviceFileHandle, Offset, (unsigned char *)"HelloWorld", strlen("HelloWorld"));
RetVal = sl_FsClose(DeviceFileHandle, NULL, NULL , 0);
// open the same file for read, using the Token we got from the creation procedure above
DeviceFileHandle = sl_FsOpen(unsigned char *)DeviceFileName,
SL_FS_READ,
&MasterToken);
Offset = 0;
RetVal = sl_FsRead( DeviceFileHandle, Offset, (unsigned char *)InputBuffer, strlen("HelloWorld"));
RetVal = sl_FsClose(DeviceFileHandle, NULL, NULL , 0);
