MQX的flashx改写

[小勇邹]

我需要使用MQX的flashx来读写flash的数据。

我的芯片是mk64fn1m。

例程C:\Freescale\Freescale_MQX_4_1_TWRK64F120M\mqx\examples\flashx中将flash切割成两个name："flashx:bank0"
和"flashx:bank1"，然后对这两个flash块进行读写操作。

我是否可以对flash重新切割，切割成好几个块，然后命名不同的文件名。

比如切割成以下几个文件，真正操作的时候单独打开读写：

File name	Flash 空间
flashx:file1	4KB($00000000-$00000FFF)
flashx:file2	48KB($00001000-$0000CFFF)
flashx:file3	972KB($0000D000-$000FFFFF)

是否可以这样切割flash？如果可以，是否可以提供改写flashx的方法？

[RadekS · Accepted solution]

About your question)

I am not sure if I understood correctly, but you probably ask if/how to create three “files” where you will write by flashX. Correct?

Yes, you can do that.

Physical description of chip flash is in _flashx_kinetisN_block_map[] in flash_frfe.c file.

Note from MQX_IO_User_Guide: The blocks do not have to follow each other, so a space between blocks is acceptable. It is required that the blocks do not intersect and that they are listed in ascending order in the array by their starting address.

In your case you should edit _bsp_flashx_file_blocks[] in init_flashx.c file and specify there your “banks”/ “files” are.

This level is pure software solution and translation to hardware level is made by flashX driver. Also name of “bank” or “file” is free…

So, you can create file structure your way.

For example:

const FLASHX_FILE_BLOCK _bsp_flashx_file_blocks[] = {

    { "file1", BSP_INTERNAL_FLASH_BASE, BSP_INTERNAL_FLASH_BASE + 0x00000FFF},

    { "file2", BSP_INTERNAL_FLASH_BASE + 0x00001000, BSP_INTERNAL_FLASH_BASE + 0x0000CFFF },

    { "file3", BSP_INTERNAL_FLASH_BASE + 0x0000D000, BSP_INTERNAL_FLASH_BASE + 0x000FFFFF},

    { NULL,        0, 0 }

};

For open this bank/file you can use command like:

flash_file = fopen(FLASH_NAME, NULL);

where FLASH_NAME could be defined for example as "flashx:file1"                

Note: frdmk64f.h file contains definition __FLASHX_START_ADDR as ((void *)Image$USEDFLASH_END$Base).

This special definition causes, that __FLASHX_START_ADDR will points to place in flash where your code ends and when you will write data from this location, you don’t need care about size of your code. It is recalculated every when you build your application.

Have a great day,
RadekS

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[小勇邹]

Hello RadekS.

Thank you very much.This is the answer that I want.I will write the question in english next time.

[RadekS]

thank you

[RadekS]

Thank you very much for contacting Freescale.   

Our support engineers are located worldwide, therefore to better support you could you please rewrite your question in English only?

I apologize for the inconvenience this may cause to you.