Cannot boot from NAND flash on AM335x EVM board

Gerald Heinig

Hello,

I am trying to boot from NAND flash on my AM335x EVM board, unfortunately without much success. Booting from SD card works fine.

I would ilke to flash the NAND via SD card, as described in the BSP user guide.

I compiled the required NAND-capable BIN files: XLDRNAND.BIN, EBOOTND.BIN and NK.BIN with the environment variable IMGNAND set to 1 in the platform builder project.

The SW3 position was 1 - off, the rest on. SW4 was 1 through 6 - ON, 7 OFF, 8 ON.

I transferred these files to my SD card, booted to Eboot using the SD card and flashed the files mentioned above in the order given above, following the instructions in the WinCE BSP ARM 8 user guide:

Enabled write of nk.bin on boot
Set ECC to BCH 8 bit ELM-X for XLDRNAND.BIN, BCH 8 bit ELM for the other 2 files
Set filename to the relevant file to flash: XLDRNAND.BIN, EBOOTND.BIN or NK.BIN
Set boot device to NK from SDCard file
Reboot to flash the file

The first two files, XLDRNAND.BIN and EBOOTND.BIN seemed to be flashed correctly. In order to boot from NAND I set SW3 to 1 - ON, 2 - OFF, the rest ON. However, the board did not boot: on reset, it just printed 'CCCC' on the terminal. Surely it should at least boot into Eboot at this stage?

What am I doing wrong?

over 12 years ago

0 Biser Gatchev-XID over 12 years ago

TI__Guru**** 393215 points

Hi Gerald,

Check this link for NAND boot DIP switch settings on the EVM.

0 Gerald Heinig over 12 years ago in reply to Biser Gatchev-XID

Prodigy 120 points

Hello Biser,

I think you forgot the link!

0 Gerald Heinig over 12 years ago in reply to Gerald Heinig

Prodigy 120 points

I just tried flashing XLDRNAND.BIN and EBOOTND.BIN and setting DIP switches 2 and 5 to ON on SW3. Still no luck.

I located this link for the switch settings:

http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#NAND

I'm using Eboot and Windows Embedded Compact, so I'm not sure whether that makes a difference.

0 Biser Gatchev-XID over 12 years ago in reply to Gerald Heinig

TI__Guru**** 393215 points

Sorry, I really forgot to paste the link, but it's the one you've located. Mind that the DIP switch is placed wrongly on the EVM - position marked with ON is actually OFF. The DIP switch settings are valid for all types of software - these are the SYSBOOT settings that the processor ROM code uses to determine the boot configuration.

0 Gerald Heinig over 12 years ago in reply to Biser Gatchev-XID

Prodigy 120 points

Hi Biser,

I've definitely set the right DIP switches: 2 and 5 to ON on SW3. However, I get no output, so there's nothing programmed on the NAND.

If I only program XLDRNAND.BIN and EBOOTND.BIN to the NAND flash and I try to boot it (using the switches above), will it boot to Eboot? Or does it need NK.BIN before it will boot at all?

0 Biser Gatchev-XID over 12 years ago in reply to Gerald Heinig

TI__Guru**** 393215 points

I can't say, I work on hardware issues only. You can try and ask this questions on the WinCE forum too: http://e2e.ti.com/support/embedded/wince/default.aspx

0 Frank Van Hooft1 over 12 years ago in reply to Gerald Heinig

Expert 1120 points

Gerald Heinig said:

If I only program XLDRNAND.BIN and EBOOTND.BIN to the NAND flash and I try to boot it (using the switches above), will it boot to Eboot? Or does it need NK.BIN before it will boot at all?

You don't need nk.bin to boot. nk.bin contains the OS. With x-loader and e-boot you should see their menus out the serial port.

0 Gerald Heinig over 12 years ago in reply to Biser Gatchev-XID

Prodigy 120 points

Biser,

thank you for your help. I've found the problem: my board's CPLD DIP switches had been set to profile 7, which disables the NAND and enables the second UART.

Setting the profile to 0 on the DIP switch solved the problem.

0 kumar bhimesh2 over 11 years ago in reply to Gerald Heinig

Prodigy 200 points

Hi Gerald,

Please let me know how to set the EVM board to profile 0 on the DIP switch. Mine is Rev 1.1A.

Regards,

Bhimesh

0 Gerald Heinig over 11 years ago in reply to kumar bhimesh2

Prodigy 120 points

Hello Bhimesh,

I've since moved on to another project, but I've managed to fish out the settings I used to boot from NAND. I've included a picture of my DIP switch below. Hope that helps.

Cheers,

Gerald

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Cannot boot from NAND flash on AM335x EVM board