NAND flash design

abdalla ali

Other Parts Discussed in Thread: TMS320C6424

Hi, Everyone

I want to design NAND flash to store my firmware . I used TMS320C6424 and 1Gb NAND MT29F1G08ABBDAHCIT . I want to design the flash area as efficient as possible to extend the life time of the NAND . In my opinion NAND will divided to four sections

1- Boot Loader

2- Master firmware (FW1)

3-Slave firmware (FW2)

4- Configuration section ( CONF)

Normally we will boot from FW1 . When firmware updated image will be wrote to FW2 and boot from FW2 if boot completed successfully FW2 will be copied to FW1 and change the boot address to the default ( FW1) . If boot not completed successfully then FW1 will be copied to FW2.

Could you please add your suggestions and recommendations. and if there are any document desripe how to design the NAND flash for Embedded system product please don't hesitated to share with us

Abdo

over 10 years ago

0 Shankari G over 10 years ago

TI__Mastermind 43955 points

Hi abdalla,

For this requirement, You can refer to two projects and try to design and implement.

1. Source code of serial flash utility:

The serial flash utility already has the code sequence of erasing, reading and writing the NAND. It will flash the bootloader into the NAND memory. It has the option of "-APPFlashBlock" which changes the block to flash the image.
Have a look at this source code

2. Source code of NAND Writer :
This also has the sequence of writing the binary into NAND. It does the verfication after writitng and it will make sure that the binary written is error free. It has the ECC enable etc for assuring the data integrity.

You have to do a code walk through on these two projects and modify it according to your requirements.

Hope this helps.

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0 abdalla ali over 10 years ago in reply to Shankari G

Intellectual 750 points

Hi Shankari

Thank you Shankari Are the source code of the serial flash and the source code of the nand writer are open source ? If so please share the download links.

Abdo.

0 Shankari G over 10 years ago in reply to abdalla ali

TI__Mastermind 43955 points

Hi abdalla,

yes, it is open source. Please download it from here.

It has both NAND writer and serial flash source code.

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0 abdalla ali over 10 years ago in reply to Shankari G

Intellectual 750 points

Thanks Shankari
This is solve the flash writing ( bootloader and data ) .
what about the wear leveling implementation
Regards,
Abdo

0 Shankari G over 10 years ago in reply to abdalla ali

TI__Mastermind 43955 points

Hi abdalla,

You will not find the wear level implementation in these source codes. These source codes are bare metal code, without operating system.
Because, usually that will be implemented in the Filesystem along with Operating system.

If you just need the code for reference, you can refer to the JFFS2 filesystem.
processors.wiki.ti.com/.../Create_a_JFFS2_Target_Image

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