Profibus on AM3356

Hiroyasu Tazawa1

Other Parts Discussed in Thread: AM3356, PROFIBUS, SYSBIOS

Hi, Everyone

I have a question about AM3356.

My customer use ISDK ver2.1.1.2 for Profibus.
They can work ISDK on ICE2 EVM.
but They can not work on their target board of AM3356.
it means it can not response.

Then I want to make sure below:
(1)Can AM3356 work on ISDK ver2.1.1.2 ?
(2)ICE2 support 24MHz clock.
but Customer board support SYSBOOT[15:14] set 25MHz.
Is it should work on ISDK when SYSBOOT is 25MHz ?

Best Regards
Hiroyasu

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

The ISDK team have been notified. They will respond here.

0 Hiroyasu Tazawa1 over 9 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you.
I wait for your answer.

Best Regards
Hiroyasu

0 Paula Carrillo over 9 years ago

TI__Mastermind 40580 points

Hiroyasu-san, could you please elaborate a little bit more what is not working? is just the communication with Profibus? or the board is not booting?

thank you,
Paula

0 Hiroyasu Tazawa1 over 9 years ago in reply to Paula Carrillo

Guru 12350 points

Hi, Paula-san

Thank you for your reply !

I have a update.
Customer's board is booting and AM335x can execute program.
They want to have communication with Profibus only.

and It is not working on their target board.
It means Slave can not response when speed is 9600bit/s.

but It is working when speed is 9800bit/s.
I guess my customer need to setup clock because soruce clock is 25MHz.

Can you give me some advice ?
I want to know where should they change this software.

C:\ti\sysbios_ind_sdk_2.1.1.2\sdk\examples\profibus_slave

and I want to make sure this program should work on AM3356.

Best Regards
Hiroyasu

0 Hiroyasu Tazawa1 over 9 years ago in reply to Paula Carrillo

Guru 12350 points

Hi, Paula

Could you reply ?

Best Regards
Hiroyasu

0 Paula Carrillo over 9 years ago in reply to Hiroyasu Tazawa1

TI__Mastermind 40580 points

Hiroyasu-san, apologize my delay, I have been out of office in a business trip, thanks for clarifying the scenario. Let me check if there is anything that need to be updated in the Profibus stack when the clock is changed and come back to you.

Thank you,

Paula

0 Paula Carrillo over 9 years ago in reply to Paula Carrillo

TI__Mastermind 40580 points

Hirayasu-san, we typically recommend our customers to first test clock settings (PLL multipliers and dividers) by loading them over emulator via a GEL file. After testing modified PLL settings to work with your new Clock rate, then, those settings can be used on SBL code to get this working on your custom board. FYI, SDK includes a CCS bootloader project that your customer can use to modify SBL code.
Have you customer done this sanity check of clock settings?

Also, for your reference, your customer could use the clock tree tool to simulate their clocks processors.wiki.ti.com/.../AM335x_Clock_Tree_Tool

Thank you,
Paula

0 Hiroyasu Tazawa1 over 9 years ago in reply to Paula Carrillo

Guru 12350 points

Hi, Paula-san

Thank your for your answer.
I got it !

Best Regards
Hiroyasu

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Profibus on AM3356