topic Re: MFS Multiple file open in MQX Software Solutions

MFS Multiple file open

nitinkothari — Tue, 12 Aug 2014 07:03:40 GMT

Hello,

I am using MFS with MQX on MCF54418.

If I try to open second file with one file already open, the fopen returns NULL and it fails.

This is how I am opening File1.txt :

//Declare File system structure

typedef struct

{

MQX_FILE_PTR DEV_FD_PTR;

MQX_FILE_PTR PM_FD_PTR;

MQX_FILE_PTR FS_FD_PTR;

char_ptr DEV_NAME;

char_ptr PM_NAME;

char_ptr FS_NAME;

} USB_FILESYSTEM_STRUCT, _PTR_ USB_FILESYSTEM_STRUCT_PTR;

//Create an instance

USB_FILESYSTEM_STRUCT stUsbFileSystem;

//Open File1.txt

stUsbFileSystem.FS_FD_PTR = fopen("C:\\File1.txt", "r");

Now my question is, how to proceed if I have to open File2.txt without closing File1.txt ?

Any help is greatly appreciated !

Regards,

Nitro

Re: MFS Multiple file open

Luis_Garabo — Tue, 12 Aug 2014 18:57:23 GMT

Hi Nitin,

Try something like this:

void my_task(uint32_t temp)
{
FILE_PTR fp;
FILE_PTR fp_temp;

_time_delay(2000);

    printf("Before write in files\n");
    fp = fopen("a:\\test.txt","a+");
    write(fp, "Hello World", 11);

    fp_temp = fopen("a:\\test_t.txt","a+");
    write(fp_temp, "Hello World_Temp", 18);

    fclose(fp);
    fclose(fp_temp);

_task_block();

}

Regards,
Garabo

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Re: MFS Multiple file open

nitinkothari — Thu, 14 Aug 2014 09:50:50 GMT

Thanks Garabo !

It worked for me. I tried the same thing earlier but it somehow failed.

Thank you again !

Regards,

Nitin