USB-Blaster II malfunction
I’m unable to get a new Altera USB-Blaster II cable working. My setup comprises the Altera 10M08 Evaluation Kit, a Altera USB-Blaster II cable, and Quartus Prime Programmer (Version 25.1std). The USB-Blaster II cable is properly detected by the operating system (Windows 11 Enterprise, Version 25H2). The default JTAG clock frequency is set to 24 MHz. With this setting, the attached evaluation board cannot be detected using Programmer GUI → Auto Detect. After lowering the JTAG clock frequency to 6 MHz and disabling the JtagClockAutoAdjust feature using jtagconfig --debug --setparam 1 JtagClockAutoAdjust 0 jtagconfig --setparam 1 JtagClock 6000000 the MAX 10 FPGA is detected. Programming the FPGA using the Programmer GUI still fails. The programming process is interrupted at random and never completes, even after multiple retries. However, programming is successful when initiated using the following console command: quartus_pgm -c USB-BlasterII -m jtag -o "P;demo10m08.pof" How can I fix this problem? Programming works perfectly when using an Altera USB Blaster or a TERASIC Blaster.
System Console master_read_memory fails above 7688 bytes on Agilex 5 (AXE5-Eagle)
A single master_read_memory of 7689 bytes or more never completes on an Agilex 5. It returns nothing, times out after 60 seconds, and leaves the JTAG channel closed so the next command fails too. 7688 bytes on the same master and the same address returns all 7688 values in under 0.1 second. The boundary is byte exact and repeats every time. I can reproduce this entirely with an unmodified example bitstream published by Arrow, so no design of mine is involved and there is nothing for me to send you. SETUP Board: Arrow AXE5-Eagle, device A5ED065BB32AE4SR0, IDCODE 0364F0DD Bitstream: axe5_eagle_voltage_temp.sof from https://github.com/ArrowElectronics/Agilex-5, path images/promo3/, md5 b391b9cd5226fe92fd2068ddc66f8442 That bitstream was built with Quartus Prime Pro 24.3 and reports "HPS present: FALSE", so it configures straight over JTAG with no bootloader merge and no HPS involvement. It exposes a Nios V node and a JTAG PHY master. Tools: Quartus Prime Pro 26.1.1 build 130, System Console from the same installation, Windows 10 Enterprise LTSC 21H2 Cable: Arrow USB Blaster ARA39943-TEI0004, JTAG clock pinned to 6 MHz, Altera JTAG Server running as a Windows service STEPS 1. Program the board over JTAG: quartus_pgm -c "Arrow-USB-Blaster [ARA39943-TEI0004]" -m jtag -o "p;axe5_eagle_voltage_temp.sof@1" 2. In System Console, open the JTAG PHY master and read: set m [lindex [get_service_paths master] 0] open_service master $m master_read_memory $m 0x0 7688 master_read_memory $m 0x0 7689 RESULT master_read_memory 7688 bytes -> 7688 values in 0 master_read_memory 7689 bytes -> nothing, 60.0 s, then: master_read_memory: This transaction did not complete e is giving up. After the failure the channel is closed and the next command reports "Channel closed" until the service is reopened. Recovering costs 20 to 60 seconds. WHAT I HAVE ALREADY RULED OUT Not the address. Identical behaviour reading from 0x0, 0x1000, 0x10000000 and 0x20000000, and shifting the base by 1, 2, 4 or 4092 bytes at a fixed size changes nothing. Only the requested byte count Not a timeout. Reads return in 0.0 s right up to 7688, then the very next byte fails. A timeout would show times rising as the limit approached, not an instant success becoming an outright fa Not the size of the reply. master_read_32 hands back a 45055 character answer without trouble, while master_read_memory fails while producing a 39044 character one. Not the design. The same byte boundary appears on two other unrelated bitstreams on this board, one with an HPS and one without, built with different Quartus versions. The Arrow example above is simy. master_read_32 IS NOT AFFECTED, AND HAS NO COMP On the same master and the same bitstream, master_read_32 was run at increasing sizes. Every one returned the full count, correctly, with no timeout and no channel closure: master_read_32 $m 0x0 4096 -> 4096 words, 16 kB spanned, 0.5 s master_read_32 $m 0x0 8192 -> 8192 words, 32 kB master_read_32 $m 0x0 16384 -> 16384 words, 64 kB spanned, 2.2 s master_read_32 $m 0x0 32768 -> 32768 words, 128 kB master_read_32 $m 0x0 65536 -> 65536 words, 256 kB spanned, 9.8 s That last one spans 262144 bytes, which is 34 times theead_memory cannot deliver, and it scales linearly at about0.15 ms per word with no sign of a ceiling. If the JTAG link, the Avalon bridge or the reply channel were the constraint, master_read_32 would degrade somewhere across that range. It does not. master_read_32 is therefore a usable workaround, but a slow one: master_read_memory returns 7688 bytes in under 0.05 s, roughly 150 kB/s, where master_read_32 sustains about 26 kB/s. Around 6 times slowp> QUESTIONS Is 7688 bytes an intended limit for master_read_memory on Agilex 5? If so, where is it documented, and does it vary by device family? The same tool version against Arria V hardware is rock solid and sh Whatever the limit is, could an oversized request return an error immediately instead of hanging for 60 seconds and closing the channel? The silent 60 second stall is far more expensive than a reject Happy to run any additional test on this board if neede
Questa-ModelSim UI scaling problems in Linux
Hello Has anybody been able to solve the issue of UI of Questa not scaling correctly on linux with wayland? I am using Ubuntu 26.04 with wayland and UI is just tiny, icons, are so small i cannot read any text. When opening a new project, file explorer is also tiny. Fonts i could change in the config file but icons, menus and everything else is just extremely small. Problem is even worse on high resolution displays. Regards, Haris
Introducing the Altera Community AI Responder — Beta
Altera is introducing the AI Responder, an assistant built into the Altera Community to help provide faster, context-aware guidance for Altera product questions. It uses relevant public Altera documentation and Knowledge Database content, with coverage continuing to expand. The AI Responder may provide source references and can hand off complex or out-of-scope questions to an Altera subject-matter expert. As a beta feature, responses may contain errors or omissions, so please review the sources and verify technical guidance against official Altera documentation before implementation. If the response does not fully address your question, add more context and tag ai_responder to continue the discussion. We welcome your feedback as we improve the Community experience.dcfifo problem
In our project, we instantiate the parameterizable DCFIFO primitive provided by Altera. The design passes simulation verification without issues; however, mismatches occur between written and read data from the DCFIFO by signalTAP during board-level testing , which consequently causes driver loading failures. fpga device：agilex7 with quartus pro25.3 dcfifo wr_clk: 450M dcfifo rd_clk: 416M the instantiate example: is there better suggestion?DisplayPort Sink (Quartus 18.1) – horizontal pixel offset.
We are experiencing an issue with the DisplayPort Sink IP core (Quartus Prime 18.1), where the captured video stream becomes horizontally shifted after some runtime. The system works correctly after reset, but after a variable period (typically several minutes), the image suddenly shifts horizontally by a constant number of pixels (hundreds of pixels). The image remains stable but shifted. After longer time (tens of minutes), the image may spontaneously recover, and the cycle repeats. This behavior only appears when the input signal is routed through a DisplayPort optical extender (G&D). Without the extender, the system operates correctly and indefinitely stable. This system design is constrained to Quartus 18.1 (cannot migrate easily) - We are primarily looking for a workaround or confirmation of known limitation - Not asking for redesign or migration unless necessarygetting a license for Quartus standard for DE10 standard board
Hello everyone, I just bought my DE10 standard board for my graduation project. Unfortunately, my university doesn't provide a license for the Quartus standard, and I need more than 90 days to finish the project. Is there any way to get a license as a student for free? My project is about an AI accelerator, so I need the standard version; the lite one isn't enough. Thank you,
