Tool/software: TI-RTOS
Hey team ,
I am using simplelink cc3200 launchpad , and i want to store a variable value in a .txt file in the flash using file operation i am able to create a file but when i am reading the value its not getting updated .if i am writing and reading it back its working properly but without writing if i try to read the previous written content its showing no value . Kindly help me with a block of code to store a integer variable value in a txt file and retain it on reset.
char* DeviceFileName = "MyFile.txt";
unsigned long MaxSize = 63 * 1024; //62.5K is max file size
long DeviceFileHandle = -1;
long RetVal; //negative retval is an error
unsigned long Offset = 0;
unsigned char InputBuffer[100];
// Create a file and write data. The file in this example is secured, without signature and with a fail safe commit
RetVal = sl_FsOpen((unsigned char *)DeviceFileName,
FS_MODE_OPEN_CREATE(MaxSize , _FS_FILE_OPEN_FLAG_NO_SIGNATURE_TEST | _FS_FILE_OPEN_FLAG_COMMIT ),
NULL, &DeviceFileHandle);
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
RetVal = sl_FsOpen((unsigned char *)DeviceFileName,
FS_MODE_OPEN_READ,
NULL, &DeviceFileHandle);
Offset = 0;
RetVal = sl_FsRead( DeviceFileHandle, Offset, (unsigned char *)InputBuffer, strlen("HelloWorld"));
RetVal = sl_FsClose(DeviceFileHandle, NULL, NULL , 0);
=========the above is working ==============
RetVal = sl_FsOpen((unsigned char *)DeviceFileName,
FS_MODE_OPEN_READ,
NULL, &DeviceFileHandle);
Offset = 0;
RetVal = sl_FsRead( DeviceFileHandle, Offset, (unsigned char *)InputBuffer, strlen("HelloWorld"));
RetVal = sl_FsClose(DeviceFileHandle, NULL, NULL , 0);
System_printf("\r\buffer content is value %s \r\n",InputBuffer);System_flush();
====simply opening the file and reading the content is not giving any output on console.
with regards
pranav
