HLS compiler failed

[lingxi10]

Hi there,

The compiler failed with error message "Unrecognized interface class conduit_end" in debug.log. I am wondering if the streaming input has maximum number of bits? When I am inputting 2056 bits it was working but doubling the input size caused this problem

[BoonBengT_Altera]

Hi @lingxi10,

Thank you for posting in Intel community forum and hope all is well.

I would say you are having the correct assumption, however to confirm further, would you be able to share more details on the sample project you are compiling on? What type of interface steam you are using? And which stage the failure occur with what compilation command?

Hope to hear from you soon.

Best Wishes

BB

[BoonBengT_Altera]

Hi @lingxi10,

Greetings, just following up on the previous clarification.

By any chances did you managed to look into the it?

Best Wishes

BB

[lingxi10]

Hi there,

Thanks for replying. The input type is ihc::stream_in<samples, ihc::usesReady<false>, ihc::usesValid<false>> where samples is an input with 4096 bits. I ran HLS compiler using i++ command and according to the debug.log I attached in my previous post, the process seems to failed at generating qsys interface for the component

Here is what I did and the info printed in the terminal if that help:

Command: i++ -march=Stratix10 -ghdl SumAndSquare.cpp -o SumAndSquare

Result: HLS Generate testbench QSYS system FAILED.
See **/debug.log for details.
make: *** [<builtin>: SumAndSquare] Error 1

[BoonBengT_Altera]

Hi @lingxi10,

Apologies for the delayed in response, noted on the interfaces used.

After some investigation the size of the data bus can be defined with the sizeof.

More details can be found in the link below for the stream interface:

- https://www.intel.com/content/www/us/en/docs/programmable/683349/22-4/pro-edition-streaming-input-interfaces.html

Hope that clarifty.

Best Wishes

BB

[lingxi10]

Hi,

Sorry for the late reply. My email is not giving me proper notifications for the update. 

Sorry can you elabrate more on how to use sizeof? I didn't find much information from the link you provided. This is the struct I used for the streaming interface: 

struct samples {
hls_register ac_int<DATAWIDTH, true> data[NCHAN];
hls_register float currSum;
};

using namespace ihc;

typedef ihc::stream_in<samples, ihc::usesReady<false>, ihc::usesValid<false>> sampleStream_t;

I think I already defined the size of the streaming input in the struct?

[BoonBengT_Altera]

Hi @lingxi10,

Greetings, just checking in to see if there is any further doubts in regards to this matter.

Hope your doubts have been clarified.

Best Wishes

BB

[BoonBengT_Altera]

Hi @lingxi10,

Greetings, as we do not receive any further clarification/updates on the matter, hence would assume challenge are overcome. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. For new queries, please feel free to open a new thread and we will be right with you. Pleasure having you here.

Best Wishes

BB

[ost]

I just noticed, you may want to try a space between the ">>" like this.
typedef ihc::stream_in<samples, ihc::usesReady<false>, ihc::usesValid<false> > sampleStream_t;