About PROFIBUS Stack

Hiroyasu Tazawa1

Guru 12350 points

Other Parts Discussed in Thread: PROFIBUS

Hi, Everyone

I have a question about ISDK Profibus of AM335x.

This document(16 page) says ARM run PROFIBUS Stack in Profibus DP of ISDK.

processors.wiki.ti.com/.../Examples_Industrial_2_1_SDK_TrainingGuide.pdf

Why ARM run PROFIBUS Stack ?
Does ARM need to run PROFIBUS Stack? when We consider PROFIBUS Application.

Best Regards
Hiroyasu

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

I don't understand your question. Where do you expect the stack to be run?

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

Guru 12350 points

Hi, Biser

Thank you for your reply.

I want to make sure both ARM Core and PRU Core can execute Profibus stack.
I understand user can choise cores to be run.
This understanding is correct ?

Best Regards
Hiroyasu

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

TI__Guru**** 393215 points

There is a picture on p.17 of the document you referred in your initial post. From it you can see how the stack is layered:

There are three software components in the PROFIBUS solution on TI devices.
•ICSS-PRU micro code that implements Fieldbus Data Link (FDL) functionality in the PRU
•The PROFIBUS-DP protocol that runs on the ARM MPU
•End equipment Industrial application that runs on the ARM MPU

•The ICSS-PRU subsystem implements the real-time PROFIBUS (Layer 2) message transmission, frame validation and communication with
the ARM processor.
•Interrupts are used to communicate with the ARM where the PROFIBUS stack (Layer 7, DP-Protocol) and the industrial application are run.
•Communication between the ARM and PRU are handled through the internal memory.

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

Guru 12350 points

Hi, Biser

I understand. Thank you.

Best Regards
Hiroyasu

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