PROCESSOR-SDK-AM335X: Nand Boot Loader

Hi Gaurav,

I'm looking into your questions today. I'll have an initial response shortly.

Regards,
Frank

Frank,

I run the NAND Flash BootLoader code in debug mode, now it is copying the application file to DDR3. 

I have flashed the NAND Bootloader code to NAND. I will check in real scenario, if everthing works fine then I will close this thread.

Thanks for your support.

Regards,

Gaurav

Hi!

Processor is not booting from NAND in normal mode. I added all the information related to sysboot pins and other things in following thread link.

https://e2e.ti.com/support/processors/f/791/t/933315

Regards,

Gaurav

Hi Gaurav,

Gaurav Aggarwal1 said:

I configured Nand Flash Writer code available in Starterware\Tools and flashed my application_ti.bin with image header 0x80000000

I assume you're referring to the application entry point mentioned here: https://software-dl.ti.com/processor-sdk-rtos/esd/docs/06_03_00_106/AM335X/rtos/index_Foundational_Components.html#tools-and-binary-formats

Gaurav Aggarwal1 said:

I gave command in command prompt "C:\ti\pdk_am335x_1_0_16\packages\ti\starterware\tools\ti_image\tiimage.exe 0x80000000 NONE application.bin application_ti.bin", is it right? 

Yes, this is correct.

Gaurav Aggarwal1 said:

It will give file size header to binary files itself, right?

Yes, it will add the TI Boot image header to the .bin file. The header is described in https://software-dl.ti.com/processor-sdk-rtos/esd/docs/06_03_00_106/AM335X/rtos/index_Foundational_Components.html#tools-and-binary-formats

Gaurav Aggarwal1 said:

How can I confirm whether tiimage is giving header correctly or not

You can open the _ti.bin file in a hex editor and check the first two 32-bit entries.

Gaurav Aggarwal1 said:

I read offset 0x00000000 and 0x00000004 from block 2 of NAND but it is not reading correctly. I am not sure. As per "http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_Foundational_Components.html#booting-via-nand", it should give size at offset 0x00000000 and loading address(0x80000000) at offset 0x00000004, am I right?

Gaurav Aggarwal1 said:

whether Nand Flash Writer code is writing binary file to NAND correctly or not

Your understanding of size & entry address is correct.

The NAND flash writer verifies all data which is written to the NAND flash. Please see nandwriter.c:LOCAL_writeHeaderAndData(), AM335X_NAND_verifyPage().

It might be worthwhile to step into AM335X_NAND_verifyPage() (debug build) for the first page written to see whether the verification is proper.

Regards,
Frank

Frank,

Thanks for your help.

I read 2nd byte of NAND block 0 and page 0. It read  0x0040f204 instead of 0x402f0400, same thing happened with 2nd byte of block 2 page 0, it read 0x00000008 instead of 0x80000000. I didn't understand.

But, if I run NAND Bootloader in debug mode then it is copying application from NAND to DDR3 correctly. Is this a issue or normal behaviour.

My major issue is NAND booting as you saw in other thread.

Regards,

Gaurav