Activity

Hi fpgaphreak,

I have two main goals with this test bench:

– Check that pixel values generated on the sensor input appear in the appropriate form on the AXI-Stream output, and completion interrupts and status registers are set correctly
– Check that the interface logic is well-behaved in the case of errors on the LVDS inputs, i.e., no FSM…[Read more]

Hi Jim,

thanks, I appreciate your detailed response. I have started implementing the VC with most parameters as model options. Originally I wanted to create a custom transaction type, but for now I am using the Stream MIT. I use the data parameter of Send() to pass the seed for pixel-data generation and generate a complete frame. This doesn’t…[Read more]

Was there any reaction of Siemens? I wonder who is working there at Questa anyway – i suggest these are the former Mentor programmers?

I have the same issue here, but only newer Questa. Formerly i did not recognize this. Possibly a config issue.

My question would be what the intention is in detail: Typically sensor interfaces are simulated and tested independently from the image content. Therefore I produced a test package capeable of driving various signal schemes and bahaviour into the lvds lines which can be simulated and also synthesized into an FPGA for real investigations of eye…[Read more]

I still do not like the ambigious way, vectors are treated agains signals, and that there is conversion required in between a(0 downto 0) = “1” instead of using “a(0) = ‘1’). See the bram addressing regarding their write enable. This is one signal only, however one uses 0…0 instead of a signal. So VHDL could be made more tolerant for that.

Hi Oliver,
There is an OSVVM SPI model at: https://github.com/noasic/SPI

My long term plan is to clone it. It is a candidate for inclusion in OSVVM.

Best Regards,
Jim

Hi Jim,

thank you for the detailed answers!

Actually I’m looking at the PCIe test framework from Xilinx. The AXI I’m planning to verify is already included in OSVVM, as I could see. For QSPI as another task I will probably need to write my own.

Best regards
Oliver