Dear using GPD, I got this : Reply contains invalid hex digit 116 0x4015f925 in dir_read (dp=0x3fff8350, vol=0) at /home/abcd/Desktop/ble_backup_standard_30-11-17/esp-idf/components/fatfs/src/ff.c:2105 the problem is inside IDF ff.c file printf register, I got: Guru Meditation Error: Core 0 panic'ed...

I got this error Guru Meditation Error: Core 0 panic'ed (LoadStoreError)

I strongly suspect that it relates to ROM (flash memory) because my app is 0.97 MB while the factory size in partition is 1MB
Any one who is well known about this, could give me advice?
thanks

Hi all,

It has been a long time, I wonder that is there anyone found out a way to speed up wifi of ESP?

or at least, can anyone give me the highest speed ?

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Sorry, I don't quite understand the question — do you want to know how to adjust the maximum number of open files? Or how to set FS_LOCK option?

I mean that this error doesnt involve in FS_LOCK because FS_LOCK belongs to error 18

Hi ESP_igrr , I read ff.h again and recognize that besides the error 16 (FR_LOCKED) that I am facing, there is the error 18: FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > _FS_LOCK */ I guess the problem we discussed that should belong to this error, instead of error 16 if it is correct, i s...

ESP_igrr

could you give me an example which use f_open to open a file and then do any handling (read or write) to that file which you are sure that it works on IDF3.0?

the sd_card example uses fopen (stdio.h) not f_open.

I really need a reference now

thanks

You can figure out whether you have concurrent operations on the same file by reviewing your code, or logging your file operations, or writing wrappers for f_open and f_close functions. thanks, I will in IDF 2.0 _FS_LOCK was set to 0, which is why you didn't get any errors reported. in IDF 2.0, I t...

does the application actually open the same file twice, or tries to do something with a file (rename, copy, etc) while it is open

is there any way to check that I am opening the same file twice?

my code now is bulky so i am not sure. However, it works in IDF 2.0 therefore I guess it should be OK

Hi ESP_igrr This error indicates that your program is performing two operations on the same file in parallel. my _FS_LOCK is 10 (and even I changed it into 100), does it still mean "two operations on the same file" causes that error (or it should be 10)? Hi Kolban, f_write belongs to fatfs library, ...

when I use f_open to open a file in sd card, it returns error (16) (if _FS_LOCK is a positive number (10)) FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */ if I down _FS_LOCK to 0, i can open file well, but there are several other problems. Can anyone tell me how ...