2 port ROM not working on Quartus 18.1 Lite

Question

I'm trying to add a 2 port ROM and it doesn't work. All other mem devices work fine, but the 2 port ROM opens a qip file instead of the mega function wizard.

azeli · Answer

Hi,Thanks for the response. Here are the main details:I am using Quartus Prime 18.1 Lite. My FPGA is a Cyclone 10 LP (10CL025YU256I7G).When I try to create a single port ROM it opens the Mega core as usual. When I select the 2 port ROM it asks for a file name and after I provide a file name (for example: rom2) and press Enter, it asks me if I want to add the file rom2.qip to the project. No Mega core wizard opens. an empty file named rom2.qip is added to the folder.Hope this gives enough info.Thanks,Assaf

vicky1 · Answer

Hi Assaf,"I'm trying to add a 2 port ROM and it doesn't work."please provide bit  more information like ,where you are trying to add, which(FPGA) device you are using, any error, screenshot etc..Thanks,Vikas

abe · Answer

I tried generating the 2-port ROM IP using two Windows 10 based systems, and in one of them faced the same issue as you've mentioned. The Megawizard customization window does not open and a .QIP file is only generated. In the other system, the megawizard opens up and I was able to customize/configure the ROM instance and generate it successfully without any issue.

I think this has got to do with system-specific settings, have you updated the Java Run-time files to the latest? I believe the megawizard plugin uses JRE. I suggest you install the latest JRE runtimes, .NET Runtime packages from Microsoft and then try.

If all else fails, then uninstall and re-install the software .

vicky1 · Answer

Hi Assaf,Thanks for the details.I have also realized the same behavior for Quartus 18.1(Lite &amp; Standard edition) with Cyclone 10 LP( 10CL025YU256I7G), but for Quartus 18.1 Pro with Cyclone 10 GX ROM : 2 port IP works fine.It works fine for Quartus 17.1 std &amp; 16.1 Lite with Cyclone 10 LP( 10CL025YU256I7G). Let me check about this unexpected behavior with team &amp; get back to you." In the other system, the megawizard opens up and I was able to customize/configure the ROM instance and generate it successfully without any issue."@Abe Could you please confirm that, your design consists of Quartus 18.1(Lite &amp; Standard edition) with Cyclone 10 LP( 10CL025YU256I7G)? and if that`s the case please provide screenshot of it.Regards,Vikas

abe · Answer

Well, here's the logs from Quartus 18.1 Std version. 1-port ROM works, but two port ROM fails. .

Info (14738): *** Fatal Error: Segment Violation at (nil)

Info (14738): Module: mega_ramq

Info (14738): Stack Trace:

Info (14738): 0x22ed5: CWizPage_LPM_RAM1::family_is_maxii() + 0xd (mega_ramq)

Info (14738): 0x43d89: CWizPage_ALL_DPRAM_MIF::IncludedInSequence() + 0xff (mega_ramq)

Info (14738): 0x8c8f5: CRWIZARD::is_page_included_in_sequence(int) + 0x6f (mega_mwizcq)

Info (14738): 0x5a0a0: CRNAVIGATION_PANEL_DECORATOR::setup_navigation_buttons_data_structure() + 0xe4 (mega_mwizcq)

Info (14738): 0x6bca3: CRNAVIGATION_PANEL_DECORATOR::create_navigation_buttons() + 0x1d (mega_mwizcq)

Info (14738): 0xa2251: CRNAVIGATION_PANEL_DECORATOR::initialize_controls() + 0x555 (mega_mwizcq)

Info (14738): 0xa28f3: CRNAVIGATION_PANEL_DECORATOR::CRNAVIGATION_PANEL_DECORATOR(unsigned int, CPANEL::LAYOUT_DIRECTION, CRWIZARD_BASE*) + 0x1f5 (mega_mwizcq)

Info (14738): 0xa29a9: CRNAVIGATION_PANEL_DECORATOR::build_navigation_panel_decorator(CRWIZARD_BASE*) + 0x33 (mega_mwizcq)

Info (14738): 0xa2a36: CRWIZARD_BASE::build_decorators(bool) + 0x66 (mega_mwizcq)

Info (14738): 0xa43d1: CRWIZARD::initialize_wizard() + 0x451 (mega_mwizcq)

Info (14738): 0xa49ed: CRWIZARD_APP::start_wizard(bool) + 0xbf (mega_mwizcq)

Info (14738): 0x7a2f1: CRWIZARD_WRAPPER::run_wizard(CRWIZARD_APP*) + 0x319 (mega_mwizcq)

Info (14738): 0x1ec78: main + 0x5c (mega_ramq)

Info (14738): 0x1ed1d: __libc_start_main + 0xfd (c.so.6)

Info (14738): End-trace