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FreeRTOS+FAT implementation without malloc

Posted by kammce on January 31, 2019

Is there a version or method of using FreeRTOS+FAT without requiring malloc? Is there a static version of this library?

FreeRTOS+FAT implementation without malloc

Posted by heinbali01 on February 1, 2019

I'm afraid that FreeRTOS+FAT depends on dynamic allocation.

It does not call pvPortMalloc() directly, in stead it lets you define ffconfigMALLOC():


define ffconfigMALLOC( uxSize ) pvPortMalloc( ( uxSize ) )


The cache memory though can be declared statically. See :

~~~ typedef struct xFFCREATIONPARAMETERS { uint8t pucCacheMemory; / User provided memory, or use NULL to malloc the cache memory. */ uint32t ulMemorySize; /* Size of the cache memory, must be a multiple of 'ulSectorSize'. */ ... } FFCreationParameterst; ~~~

The creation parameters will be passed to : ~~~ FFIOManagert *FFCreateIOManger( FFCreationParameterst *pxParameters, FFError_t *pError ) ~~~

The cache memory is used as data buffers between driver and disk. Each block of cache is 512 bytes long.

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