AM2634: Example sbl_qspi doesn't work as intended

Hi Wenkai,

Let me check and get back to you on this by EoD.

Thanks and Regards,
Aakash

Hi Aakash,

I reinstalled MCU+SDK and that resolved my item #3, i.e. sbl_qspi.release.tiimage from sdk 08_03_00_23 works now.

But my item #2 still stands: After I used the tiimage built from the sbl_qspi example to replace pre-built version, flashing the device was fine but QSPI bootloading didn't work - it didn't print out correct messages but just some random numbers.

The baud rate was correct and it worked when I used pre-built version. The application I used for the test was: ipc_rpmsg_echo_system.appimage which was built from the imported example.

Also the imported example sbi_qspi still didn't work when in CCS debugger (Bootmode was set as "NO BOOT MODE")

BTW, Which SBL program you used can print out device type info, like HSFS or HSSE? Do you also have the source code? - this question is from the other thread. 

Thanks,

Wenkai

Hi Wenkai,

That's not the correct way.

The sbl_qspi may not work if you load it via CCS. You must use uart_uniflash to flash the SBL_QSPI as well as the application image. Please follow the steps mentioned at this location - AM263x MCU+ SDK: Flash a Hello World example (ti.com)

You can also flash ipc_rpmsg_echo_system.appimage on top of that as your user application.

Hope that helps.

Best Regards,
Aakash

Wenkai said:

After I used the tiimage built from the sbl_qspi example to replace pre-built version, flashing the device was fine but QSPI bootloading didn't work

What about using tiimage built from the sbl_qspi example to replace pre-built version and use uart_uniflash to flash the SBL_QSPI as well as the application image? I tried and it didn't work for me either.

The reason I did that was: to be able to use customized SBL tiimage, I just modified sbl_qspi example and used the newly generated tiimage to replace pre-built version in the configuration file "default_sbl_qspi.cfg" but it didn't work so I just built the original sbl_qspi example without any modifications, but it still didn't work.

So the question is: can I use the example code sbl_qspi as the baseline to create our own SBL code? Why it didn't work for me?

Thanks,

Wenkai

Hi Wenkai,

Wenkai said:

What about using tiimage built from the sbl_qspi example to replace pre-built version and use uart_uniflash to flash the SBL_QSPI as well as the application image? I tried and it didn't work for me either.

The reason I did that was: to be able to use customized SBL tiimage, I just modified sbl_qspi example and used the newly generated tiimage to replace pre-built version in the configuration file "default_sbl_qspi.cfg" but it didn't work so I just built the original sbl_qspi example without any modifications, but it still didn't work.

Are you using the TI-EVM like am263x-cc or am263x-lp ? If not, then can you tell me more details about your setup as in which flash are you using ? Did it pass the flash_diag before sbl_qspi ?

Wenkai said:

can I use the example code sbl_qspi as the baseline to create our own SBL code? Why it didn't work for me?

Yes, That is the primary motive to share the SBL source code with the developers. So they can modify it based on their custom boards or change its flow if required.

Best Regards,
Aakash

Hi Aakash,

Aakash Kedia said:

Are you using the TI-EVM like am263x-cc or am263x-lp ?

Yes, I used am263x-lp and tried both sdk packages: 08_03_00_23 and 08_02_01_08.

thanks,

Wenkai

Hi Wenkai,

The prebuilt binaries I have shared is for am263x-cc. Did you try with prebuilt binaries for lp ?

Best Regards,
Aakash

Yes, I didn't use the one you shared. The pre-built version works fine; the issue came up only after I replaced the pre-built one with the one freshly built from the example code.

Thanks,

Wenkai

Hi Wenkai,

The example generates the prebuilt binaries. This issue is very strange. Let me retry this on my end and then get back to you on this.

Thanks,
Aakash

I didn't make any changes, just built the imported example sbl_qspi in CCS and used generated "sbl_qspi_am263x-lp_r5fss0-0_nortos_ti-arm-clang.tiimage" to replace pre-built one in the config file "default_sbl_qspi.cfg". Did I miss anything here?

Your original tiimage works, but after I rebuilt your project it stopped working again. So I reinstalled SDK and even CSS, OpenSSL but it's still not working. Then I tried to use gmake to build the example with make file but it still failed.

Any idea what the problem could be?

This is what showed up on the terminal instead of correct messages: (seems like in UART mode but it was at QSPI mode)

000002020100000000000100414d323633580000000000000400cdab00000100010000000000000000000000000000000000000050d39632c39b4506e692c404625dcb0762b9770ae7166e7f1fb537404b7beceba254256c884d098cdb906573b92ee15169f9493be861bef6e4b1c8ffe67edb9c000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001f8c30ee93af832c3c22fb5c5a56d5dfea1e55c97f704af32155d7b3aa0aff90af8511b580312c2004876cf51e90bc238f1b59d06f6f46b1ef7e7a0429c196d0CCCCCCC

Hi Wenkai,

Seems like the X509 image (also called .tiimage) programmed in flash is somehow corrupted. Hence, ROM could not verify and boot the SBL from the QSPI and entered the UART mode as a fail-safe mechanism.

Just a suggestion -

In your default_sbl_qspi.cfg only load the sbl_uart_uniflash and sbl_qspi (without application). Does that work ?

Like this -

BR,
Aakash

I just tried only loading sbl_uart_uniflash and sbl_qspi (without application), and it still doesn't work (entering USRT mode).

Thanks,

Wenkai

Any idea what's wrong here?

Hi Wenkai,

Let's plan a debug session or we would need the project from your end to replicate the issue.

Best Regards,
Aakash

I am OK either way. How should I upload my project, just link it?

Hi Wenkai,

As a first step, I would like to check the project which you can upload it here - https://tidrive.ext.ti.com/u/gzbyrba28qmRNvKg/5470194c-dd5c-4278-93cd-bc5ebe39b5dd?l

Secondly, if the project works, then I would like to know more on your steps over the debug call.

Best Regards,
Aakash

Hi Aakash,

I uploaded the project which I tried last night but still failed after I reinstalled all the software: CCS, SDK, OpenSSL, sysConfig.

BTW, I also tried it in Linux (Ubuntu) environment and it worked.

Thanks,

Wenkai