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Regarding format of external SRAM of 2MB using MQX MFS

Question asked by Ashok G on Mar 20, 2014
Latest reply on Mar 31, 2014 by Carlos_Musich

Hi All,

 

I working on Freescale MQX 4.0 with MFS and USB host stack plugins added to our project.

 

I need to format external SRAM  with FAT 12  which is connected to K20Dx128VLH7 MCU  via Flex Bus Engine. To format SRAM we are using MFS on SRAM ( SRAM size is 2MB) .

 

K20Dx128VLH7 MCU can support only 18 address lines (256 k) to interact with SRAM. I want to extended the Flebus address by using extra I/O lines of controller so that i can format 2MB of SRAM.

 

Now , my question is MFS is handling up to 18 address lines of Flexbus in the Stack. I want to add my own SRAM driver in order to support whole 2MB of SRAM with extended I/O lines.

 

Can anyone  please suggest any example code or how can i write my own driver and integrated to MFS stack.?

 

Regards,

Ashok

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