MQX Software Solutions中的主题 Re: Question about flash_X Driver

Question about flash_X Driver

AF_Ariel — Thu, 04 Nov 2010 20:41:54 GMT

Hello:
I'm working on a project that used the MQX flash_x driver on a MCF52259 procesor. The default configuration of the driver have 4 sector of 4kbytes of size. My application need more space than that. So, is it posible to expand the flash_x memory of the driver?. If it is, could you provide an example?

Yours sincerely

Re: Question about flash_X Driver

PetrM — Tue, 09 Nov 2010 19:59:22 GMT

Hello,

you cannot change the sector size, so you need to align the overall size according the sector size. It's controlled by BSP macro BSPCFG_FLASHX_SIZE.

Anyway, the actual size you'll get is dependant on the available free flash after your code. If your requested size doesn't fit there, you'll get runtime error during installation of flashx.

PetrM

Re: Question about flash_X Driver

AF_Ariel — Tue, 09 Nov 2010 21:52:13 GMT

hello:
Thank you for your responce PetrM. Certainly, I realy need more number of sectors, I'm not intrested in change the size of the sectors. So, there is a procedure to extend the number of sectors of the flash X driver?
Thank you in advanced

Re: Question about flash_X Driver

DavidS — Thu, 11 Nov 2010 02:55:52 GMT

Hello,

I found that you can modify the twrmcf52259.h header that define the BSPCFG_FLASHX_SIZE from 0x4000 to (FLASHX_END_ADDR - FLASHX_START_ADDR)

This macros are defined in the intflash.lcf file at the bottom.

When I made that change and recompiled the RTOS and FSLMQX/mqx/examples/flashx application my total available flash space was 0x70000.

Regards,

David

Re: Question about flash_X Driver

AF_Ariel — Thu, 11 Nov 2010 03:10:20 GMT

Thanks for the tip Davis