Linux/Can't Load Linux

Oleg Solovev

Expert 1985 points

Other Parts Discussed in Thread: AM5749

Hello support!!!

I use ti-processor-sdk-linux-am57xx-evm-06.03.00.106 on am5749(custom board).

My board based on AM574x IndustrialDevelopmentKit (IDK)EvaluationModule(EVM).

I no have emmc on my board, and I have only 1,5Gb RAM memory.

sysboot[3:0]:0b0110 ,sysboot[5:4]:0b00

When I install the SDK in file Rules.make i found some error:

#u-boot machine
UBOOT_MACHINE=am57xx_evm_config

This file file does not exist. In directory SDK I have only am57xx_evm_defconfig. I think it is should work, change the Rules.make and then I try to run script create-sdcard.sh.

In result i have a sd card with 2 parts one of the parts it is U-boot, another one Linux kernel e.t.c.

When i try to load the Linux I didn't see any information in console, but board indication looks like U-boot cant find or load Linux kernel.

In a table here: https://software-dl.ti.com/processor-sdk-linux/esd/docs/06_03_00_106/linux/Foundational_Components_U-Boot.html

I didn't see information about AM574x (IDK)EvaluationModule(EVM) which config to need for a make right U-boot.

over 5 years ago

0 Keerthy J over 5 years ago

TI__Guru**** 163150 points

Hi Oleg,

Please try to boot the with pre-built images that are in the SDK.

Copy $SDK_DIR/board-support/prebuilt-images/MLO-am57xx-evm to the boot partition & rename it to MLO
Copy $SDK_DIR/board-support/prebuilt-images/u-boot-am57xx-evm.img to the boot partition & rename it to u-boot.img

Regards,
Keerthy

0 Oleg Solovev over 5 years ago in reply to Keerthy J

Expert 1985 points

When I use create-sdcard.sh, I select the item (use pre-built images) this does not work. yor method the same and still does not work too

0 Oleg Solovev over 5 years ago in reply to Keerthy J

Expert 1985 points

Hi Keerthy,

Could you confirm the information about: When the U-boot started on AM574x IndustrialDevelopmentKit it use some information for recognizing board from U33 ?

I mean if I have empty CAT24C256W or no have it. Is it can be a reson for this problem on my custom board?

0 Keerthy J over 5 years ago in reply to Oleg Solovev

TI__Guru**** 163150 points

Hi Oleg,

I even checked with our development team board identification should be wrong as it might default
so some known board but boot should not be breaking without the eeprom part.

Regards,
Keerthy

0 Keerthy J over 5 years ago in reply to Keerthy J

TI__Guru**** 163150 points

Hi Oleg,

Any updates on this? Can you resolve this?

Best Regards,
Keerthy

0 Oleg Solovev over 5 years ago in reply to Keerthy J

Expert 1985 points

Hi Keerthy,

Could you tell me please:

which the minimum I need for a loading in boot directory:

1.am574x-idk.dtb

2.zImage-4.19.94-gbe5389fd85

3.vmlinux-4.19.94-gbe5389fd85

4.uImage-4.19.94-gbe5389fd85

5.zImage(link)

6. uImage(link)

Regards,

Oleg

0 Oleg Solovev over 5 years ago in reply to Oleg Solovev

Expert 1985 points

Hi Keerthy,

The qustion about U33:

Are you really shure about: I should work without U33 or empty U33???

If you have a possible try to desolder U33 from the EVM board and try to boot.

Regards,

Oleg

0 Keerthy J over 5 years ago in reply to Oleg Solovev

TI__Guru**** 163150 points

Hi Oleg,

1 & 2, 5 should be sufficient to boot.

Regards,
Keerthy

0 Keerthy J over 5 years ago in reply to Oleg Solovev

TI__Guru**** 163150 points

Hi Oleg,

No i do not have the option to desolder. So without U33 you are not getting any output from UART without
that?

- Keerthy

0 Oleg Solovev over 5 years ago in reply to Keerthy J

Expert 1985 points

Hi Keerthy,

I will give you the answer when I finish DRAM configuration.

In a datasheet: AM574x Industrial Development Kit (IDK) Evaluation Module (EVM) Hardware User's Guide

Section 4.3 and 5.3 we have information about this. I can't check it now because I haven't EVM board but if it's true....I do not understand company policy, I mean If I would like to create custom board and for example I haven't this eeprom(or my eeprom is empty)...it is mean I can't use SDK. Because some parts of this SDK (how I uderstood it is u-boot) get some information from this eeprom. In my opinion everything should working from a pack perfect(I mean SDK). It is should include minimal set for a working am5749(exactly). It is doesn't metter which board do you have custom or EVM if you have the same scheme like EVM.

Regards,
Oleg

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