Hi,
Re: MDK-ARM CM3 Middleware FileSystem. FAT Drive on a NAND Flash ("N0:").
I'm looking for a method to check, wether a FAT drive is initialized or not! I must check, wether finit() had already been called or not.
I could not find a sufficient "high"-level Utility Routine. Thus I considered about using IO Control Interface Routines. Therfore I first had to get an id: fs_ioc_get_id("N0:") returns drv_id = 1 on an uninitialized(!) drive which causes further fs_ioc-functions to crash.
Do anyone have an idea, how to check wether a (nonremovable NAND Flash) FAT drive is initialized or not?
Best regards Matz
Would the following be sufficient?
uint32_t Drive_N_Initialized; //global scope void Drive_N_Init(void) { fsStatus stat; stat = finit("N0:"); if (stat == fsOK) { Drive_N_Initialized = 1; } else { Drive_N_Initialized = 0; } }
Hi Vladimir,
thanks, this will work of corse. But in my case finit is done by another (third party) modul not providing a separat status variable. I do not believe that it should be impossible to query the state (is finit?) directly from the file system middleware itself. Unfortunately it seems to be so. Or does someone else have a solution?
Best regards. Matz
I guess there is no easy way, but linker can help us a bit: www.keil.com/.../armclang_link_pge1362065967698.htm
uint32_t Drive_N_Initialized; //global scope extern fsStatus $Sub$$finit (const char *drive); extern fsStatus $Super$$finit (const char *drive); fsStatus $Sub$$finit (const char *drive) { fsStatus stat; stat = $Super$$finit(drive); if ((drive[0] == 'N') && (drive[1] == '0')) { if (stat == fsOK) { Drive_N_Initialized = 1; } else { Drive_N_Initialized = 0; } } return (stat); }
Great. I never get in touch with $Super$$ and $Sub$$ before. I admit that I did not learn the manual completely by heart... I'm happy that there is this forum. Thanks for now.
Matz.