Am3352 boot

Hui Li1

Other Parts Discussed in Thread: AM3352, AM3359

Hi all,

I am using the Am3352 in my system. When powers up, I will receive 'C' on uart0 CONTINUOUSLY, even any kind of boot sequences are configured. This is not as technical reference manual says. What 's the problem happened to my system?Thanks

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

If UART0 is included in the boot sequence this is quite normal.

0 Asif Ismail over 11 years ago in reply to Biser Gatchev-XID

Prodigy 25 points

Hi,

How can it be normal as in u-boot file UART0 is set as debug port and if it shows no response to the boot file.

What does 'C' mean during boot up of AM335x

Thank you

0 Biser Gatchev-XID over 11 years ago in reply to Asif Ismail

TI__Guru**** 393215 points

It means that the ROM code is going through the boot devices set by your SYSBOOT[15:0] pins (UART0 should be one of them if you see the CCCCCCCC string) and doesn't find a valid boot file. Can you share your SYSBOOT[15:0] values and what device are you trying to boot from?

0 Hui Li1 over 11 years ago in reply to Biser Gatchev-XID

Prodigy 70 points

Yes, this is normal. Now I can boot the system via uart0. I just wondered that C string is printed out continuously in my AM3352 system, while eight C chars printed out, followed by 5 seconds pause, and so on, in the EVM AM3359 board. Is this the difference of the version of the ROM code between am3352 and am3359? Any way , this does't matter for me.

Thank you very much

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