Linux/AM3358: U-boot doesn't print messages

Nguyen Duong94

Part Number: AM3358

Tool/software: Linux

Hi all,

I have a problem when i try to update SDK from ti-sdk-am335x-evm-06.00.00.00-Linux to ti-processor-sdk-linux-am335x-evm-04.00.00.04-Linux for my custom board (design base on AM335x EVM board).

With ti-sdk-am335x-evm-06.00.00.00-Linux i can create sd card and run well.

But when i switch to use ti-processor-sdk-linux-am335x-evm-04.00.00.04-Linux, i create sd card and put in the board but when power on, on terminal (i use putty) dont show anything.

I think the problem from u-boot 2017 in ti-processor-sdk-linux-am335x-evm-04.00.00.04-Linux, so i try to add some function to print information on some file in U-boot like:

/board/ti/am335x/board.c

/common/spl/spl.c

/arch/arm/mach-omap2/am33xx/board.c

......

but on terminal still dont show anything, so can anyone help me fix this problem, many thanks you, :)

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

By "ti-sdk-am335x-evm-06.00.00.00" do you mean kernel v3.2?

0 Nguyen Duong94 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 560 points

yes, u-boot 2013.01 and kernel v3.2

0 Biser Gatchev-XID over 8 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

Which UART are you using for debug console?

0 Nguyen Duong94 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 560 points

thank for your help, Im using uart0 for debug console

0 Biser Gatchev-XID over 8 years ago in reply to Nguyen Duong94

TI__Guru**** 393215 points

The latest U-boot is very different from the one you used previously. Please refer to processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide The main difference is that U-boot now uses device trees. I have notified the software team, and they will continue on this thread.

0 Nguyen Duong94 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 560 points

thanks you, but in my opinion the boot process is MLO-->Uboot--->Device tree--->Kernel ---> rootfs, so i dont think so the problem belong device trees

0 Biser Gatchev-XID over 8 years ago in reply to Nguyen Duong94

TI__Guru**** 393215 points

Another thing to look at is whether you have disabled the EEPROM check in MLO/U-boot.

0 Nguyen Duong94 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 560 points

I have been disabled the EEPROM check in MLO/U-boot, when i presss reset button on my custom board the string "CCCC ....." will be output in windows terminal(ex.Putty)

0 Kemal R. Shakir over 8 years ago in reply to Nguyen Duong94

TI__Guru 55345 points

Can you check that your SD card is properly created and has a bootable flag?

0 Nguyen Duong94 over 8 years ago in reply to Kemal R. Shakir

Intellectual 560 points

Thanks Mr.Shakir and Mr.Biser, I can fix my issue, my custom board use difference RAM with AM335x EVM board, so i custom config DDRAM on U-boot source code, and i can boot MLO, u-boot.img, :)

Processors

Processors forum

Linux/AM3358: U-boot doesn't print messages