OPB monitor error

Mar 28, 2006 7 Replies

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dumak23 20 years ago

Hi all,

I'm currently verifying an OPB master i/f using IBM's OPB monitor. I'm currently getting an error 1.11.3, which says I didn't increment the ABus correctly during seqAddr bus access. The particular case I'm looking at is this: ABus = 32'h00000E69, and BE = 4'b0111, using sequential address, byte-enable transfer, and xfer_size is "byte." The slave I wrote into is a full-word device that supports byte-enable. So, there shouldn't be any need for conversion cycles, and so my next ABus is 0x00000E6C. But apparently the OPB monitor flags this as an error. I think it expects the ABus to be incremented only by 1, since the previous xfer_size is byte. I think this is correct _if_ I'm using the basic dynamic sizing and _not_ the byte-enable architecture.

Digging into the OPB monitor code, it seems that the process that checks for this particular scenario only checks for the xfer_sizes and xfer_acks - there's no references to byte-enable signals. The OPB monitor version I have is 2.0.1, and it seems to be the latest version that you can get from Xilinx.

Any help / input is greatly appreciated.

Thanks,

dumak23

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Aurelian Lazarut 20 years ago

Hi dumak23 this looks wrong to me "ABus = 32'h00000E69, and BE = 4'b0111"

is this a typo? you have 3 byte lanes enabled, I'm not an OPB expert but I think it should be 4'b1000

Aurash

snipped-for-privacy@yahoo.com wrote:

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Guru 20 years ago

Hi dumak,

Sorry I cannot help you, but I have some questions since you are doing the thing that I want to do by myself. I have about the same problems. I am exploring OPB Master capabilities designed with EDK's Create - Import peripheral wizard. I inserted Chipscope IBA/OPB core to my desing to monitor OPB bus. The problem are the signal names in ChipScope Analyzer - there are 80 of them with NO names attached. How to correctly assign signal names (or should I make a custom core with ChipScope Core Generator)?

Cheers, Guru

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Zara 20 years ago

Look at a directory with a name of the sort "implementation\chipscope_opb_iba_0_wrapper", you will sess a .cdc file, this is the file to load from Chipscope analyzer with the signal name assignment.

Best luck,

Zara

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dumak23 20 years ago

Hi Aurash,

I believe this is a valid combination, according to Table 14 of the OPB specs.

- dumak23

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dumak23 20 years ago

Hi Guru,

I think you have to use the FPGA editor and extract the names of the signals.

- dumak23

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Guru 20 years ago

Hi Dumak,

Zara was right (thank you :)). I found .cdc file at the "implementation\chipscope_opb_iba_0_wrapper". It helps a lot.

Thnx,

Guru

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Guru 20 years ago

Hi Dumak,

Zara was right (thank you :)). I found .cdc file at the "implementation\chipscope_opb_iba_0_wrapper". It helps a lot.

Thnx,

Guru

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