I cannot create subfolders in FATFS

RE: I cannot create subfolders in FATFS

Jakub Rzeszutko — Wed, 28 Mar 2018 13:55:51 GMT

Hi,

As I read it is basically not recommended to use strtok function due to some drawbacks. If possible you should use strtok_r.

One of the drawbacks of strtok is that this function is modyfing its first argument. When you are trying to modify text pointed by char * str, most likely you are trying modify const variable (written in Flash).

When you will use an array you will not have this problem as string will be in RAM.

RE: I cannot create subfolders in FATFS

IlyaM — Wed, 28 Mar 2018 13:19:41 GMT

Jakub, thanks for your reply! Could you please explain why char array should work instead of pointer? Cause printf works fine and I see all my subdirs

RE: I cannot create subfolders in FATFS

Jakub Rzeszutko — Wed, 28 Mar 2018 12:58:12 GMT

Simply change:

char *str = "dirA/dirB/dirC/file.txt";

to:

char str[] = "dirA/dirB/dirC/file.txt";

and you shall be fine

RE: I cannot create subfolders in FATFS

IlyaM — Wed, 28 Mar 2018 12:26:29 GMT

Ok, have a nice holidays)

RE: I cannot create subfolders in FATFS

Hung Bui — Wed, 28 Mar 2018 12:24:45 GMT

Hi IllyaM,

We currently have limited staff due to Easter holidays. We will try to have a look at your case as soon as possible when the team coming back next week.