Questions tagged [cyclone]
Cyclone is a family of FPGAs from Altera
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Cyclone III FPGA 16x2 LCD repeat one character instead of displaying complete word
So I am trying to use the LCD on the cyclone III FPGA.
I have written this verilog code that should display numbers 0 to 9 then letters A to G
Compiling the code has no errors at all
However, when ...
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1
answer
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Debuging verilog SDRAM controller
I've been working on a project that involves the creation of a SDRAM Controller in verilog for an Altera DE2 prototyping board. Despite reading the documentation for the memory chip on the board, ...
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Change clock frequency from 50MHz to 40MHz using Altera Cyclone IV and Quartus Lite 20.1
I'm using the FPGA board EasyFPGAv2.2 which have Altera Cyclone IV with chip EP4CE6E22C6 and I made a verilog program to generate VGA 640x480 60Hz signal. It works great dividing 50MHz by 2 generating ...
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Syntax Help: VHDL Syntax Error at *.vhd near text ["process", "behave"] expecting "if"
Problem
I'm developing a simple LED blinking system in Quartus Prime Lite 18.1 to be instantiated on a DE0-Nano development board that makes use of the Cyclone IV E generation of Intel FPGAs. To do so ...
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Intel FPGA input voltage between Vil and Vih : what's happening?
Considering these settings:
Cyclone 10 LP (or Cyclone II / Cyclone III / Cyclone IV)
IO configured as Input LVTTL 3.3V (Vilmax=0.8V Vihmin=1.7V)
Voltage between 0.8V and 1.7V on this input
No CLK ...
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4
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FPGA counter value unstabillity
I have been building a synchronized I2C slave receiver with Verilog.
The I2C slave receiver did not encounter any issues when I simulated it with Modelsim. However, it does not function properly ...
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FPGA starts working after irrelevant changes, why?
I have written a UART module in Verilog. By using that module I get data from PC via UART and then send that data back again via this UART module. I uploaded it to FPGA for testing. It works flawless ...
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Why are registers being turned on to 1 before reset/on button is hit on FPGA?
I am writing a really simple program on Verilog for my FPGA to have an LED blink once a button is pushed. Here is the code I have written:
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3
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Why is my seconds counter in verilog jumping values behaviour?
I am implementing a seconds counter on the Altera DE-1 Educational Board powered by the old Cyclone 2 FPGA. My plan is to make a 'down-clocker' that takes the on-board 50 MHz clock and produces a 1 Hz ...
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My JTAG connection with Cyclone IV is not working
My FPGA board is not programming. I think I have followed all the guide lines for JTAG connection. Can you see any problems with this connection?
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What's wrong with this schematic for powering up Cyclone IV FPGA?
I have followed all the guide lines for powering up the Cyclone IV. However, the 3.3v Regulator is heating too much and also the Cyclone IV FPGA. What's wrong with my schematic? Is there a problem in ...
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Identify valid FPGA configuration image in serial flash device?
How can I know if there's valid FPGA configuration image in the specific location of the serial configuration device before I perform reconfiguration and experience successful or faulty attempt?
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Altera Cyclone II Quartus II JTAG Programming Error
I'm trying to program a Cyclone II I bought here using Quartus II 13.0sp1 on Arch Linux. I'm trying to program it with a very simple Verilog program with three inputs and two outputs and a few simple ...
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How to implement an ADPLL in Verilog that locks onto an arbitrary sine wave? [duplicate]
I'm unable to figure out how to implement an ADPLL on an FPGA that can take in an arbitrary periodic input and lock onto its frequency (some finite range is okay) and phase. A square wave output will ...
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How to open up serial terminal for my USB device converter (or, how to enable VCP in linux)?
I am using a new Cyclone V SoC board by Enclustra (Mercury+ SA2) mounted on their PE-1 BaseBoard.
To connect to the board serially on Windows platform, I have to connect the board which is detected ...
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What is the minimal schematic (needed capactiors/resistors) to use FPGA Altera Cyclone 4 EP4CE6E22C8N? [closed]
I can't find any information about how wire the Cyclone 4 FPGA.
I do not want to use development boards.
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Change memory content of FPGA SoC (DE1-SoC) using software while .sof (EPCQ) is running on FPGA
I am new to FPGA and FPGA-SoC world. I have a DE1-SoC board. I am doing a project. Hardware design of the project contains a memory block which is initialized using .mif file. I know that we can use ...
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How can I transfer data to cyclone 4?
I have the fpga below, I managed to implement a couple of simple designs. According to the manual it should be possible to foward data from my laptop to the fpga using the usb-blaster cable, I cannot ...
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Altera Cyclone V - Linux & FPGA interrupt handling
I need to propagate an interrupt from my custom FPGA IP core to the HPS system of a DE0_nano_SoC (Cyclone V HPS-FPGA architecture) and handle in Linux. I have googled quite a lot to confidently say ...
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Error (209015): Can't configure device. Expected JTAG ID code 0x020B10DD for device 1, but found JTAG ID code 0x000210DD
I bought from ebay Altera Cyclone II EP2C5T144 development board. It came with USB Blaster. I'm using Quartus II 13.0sp1.
FPGA is programmed with default settings as it should be (flashing onboard ...
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FDCE flip-flop primitive in Altera Quartus?
I would like to know the Altera Quartus primitive equivalent to the FDCE flip-flop on Xilinx ISE.
I think that the DFFE primitive might work, however, I am not sure about the CE and CLR pins ...
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On Cyclone II FPGAs can I apply voltage directly on input pins?
On Cyclone II FPGAs can I apply voltage directly on input pins, maybe taking it from a Vcc pin? Or should I use a resistor? The Altera DE2 board's schematics below looks like some input switches don'...
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VHDL error: multiple constant drivers for net
I can't find how to deal with the error: "multiple constant drives" which occures when I try to read and set the same net in a single process.
I need to set the "output" for some clock cycles on the ...
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Why would IO pins be tied to VCC or GND with 0 Ohm resistor on FPGA Dev Board?
I have a cheap Altera Cyclone II EP2C5T144C8 Dev Board and a few (4) of the IO/LVDS pins are shorted to VCC or GND as shown in the schematic segment below. The pins are also brought out to headers on ...
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FPGA Memory vs Registers
I'm having an issue on an FPGA project I'm working on. I'm unable to write to defined memories within the FPGA, but writing to registers works fine. I was thinking about working around this problem by ...
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Failing to program Cyclone IV GX device via JTAG
I just got the aforementioned device and, upon writing a simple program (it compiles) and going into Programmer, when I try to program the device with the .sof file, I see is ...
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Cyclone V external memory group pins DQ/DQS
I'm trying to understand the functions of external memory pins in Cyclone V (5csema5af31c6n)
I do understand that colums HMC Pin Assignment for DDR3/DDR2/LPDDR2 shows pin functions for external ...
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Output CLOCK signal to GPIO pin of CYCLONE IV E
I am new to FPGA and I am trying to send a CLOCK signal as an output of a GPIO pin of an Altera Cyclone IV E. I first made a program:
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Adaptative Logic Module : Logic Element equivalence
I have implemented some circuitry with Quartus on a Cyclone 5 FPGA. This has be done for my master thesis. I have to justify wether the number of logic element used by my implementation is "expected" ...
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Error (209015): Can't configure device. Expected JTAG ID code 0x02D010DD for device 2, but found JTAG ID code 0x00000000
I'm having a weird problem where i cant upload my design to the DE0-NANO board, gives me the weird error message which is the title of this question.
Any other design uploads fine and I have done ...
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Implementation of NIOS Softcore alongwith HDL modules on Aletra Cyclone IVGX
My question is not on 'how can' but 'if can'. So I believe people with sufficient experience on any FPGA family might be able to help me out here.
Problem Statement: I need to model a very basic ...
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Verilog outputting specific bit from register to output; getting constant 1's
I am trying to create an program that bit bangs a value from an FPGA to an arduino. In the module I created, every other clock cycle, the FPGAdata output should be set to the next bit of t. The ...
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Synthesizeable D Flip flop for FPGA
Having played around with Verilog for some time now, I decided to graduate to implementing designs on Alltera CycloneIV FPGA using the Quartus suite.
Starting with a simple D flip flop, I face the ...
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FPGA non-volatile progamming
I recently bought a Cyclone II FPGA here. I have been able to program it with a USB Blaster cable and the Altera Quartus Software. The problem is that when I disconnect power, I lose the program. ...
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Cyclone V LVTTL GPIO Termination
On the DE1-SoC (from Terasic) schematic, I found 47 Ohm series resistors connected to GPIOs, they are using 3.3V VCCIO.
The cyclone V datasheet show that no external termination is required as shown ...
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Possible causes of dead cyclone IV on custom board
i designed and soldered my first fpga board using cyclone IV in the 144 eqfp package. First of all, i made following mistakes:
I am using 3.3V VCCIO for all IO banks. I misread the handbook and
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CycloneIV PCIe hard IP fixedclk_serdes generation
I'm trying to build a minimal design with PCIe on CycloneIV, and have trouble getting the core_clk_out to actually run.
In the PCIe user guide, page 13-9, it says ...
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For a PLL Clock multiplier, where does the new clock come from?
If I understand it correctly, you use a PLL in an FPGA to get a higher clock from, say, a 50 MHz oscillator by synchronizing the faster clock to the slower reference one. Like if I had a 50MHz crystal ...
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Write an I2C code for Cyclone 2 architecture
I really need to I2C interface my FPGA with some slave device. I figured I could use the audio codec in my FPGA as a slave.I have gone through some codes from the internet for I2C. But I do not get ...
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Keypad Scanner Verilog code problem with state machine and column input
I am developing a Keypad both in hardware and Verilog using a DE2 Cyclone II board. I made a keypad using buttons (switches) that follows this schematic:
The scanner works by setting the Column ...
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reuse Cyclone IV fpga Pasive serial configuration pin for SPI
Can i reuse pins DATA0 & DCLK in my application as FPGA SPI interface after configuration (PS) has been completed ?
This are the dual purpose pin options:
if i set "use as Regular I/O" , i will ...
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How to constrain fitter to assign signals to specific LE input in Quartus II?
I have noticed that the time delay through a combinatorial cell in an LE can depend significantly (up to .1 ns on my DE-0 Nano Cyclone IV board) on which input, A thru D, the input is assigned to. To ...
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FPGA outputs are always high with basic and/or program
So I am just getting started developing with an Altera Cyclone II EP265 mini board, and I am having some trouble getting a program that outputs the "and" and "or" of three inputs working.
The full ...
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A simple VHDL circuit won't display initial value
Here is my code and it's pretty simple. I'm to cycle through the first 8 letters of the alphabet on a Altera Cyclone II board.
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Shematics of the BeMicro CV eval board from Arrow
Where can I find the complete schematics of the board?
Arrow sells an ultra low cost FPGA platform with a Cyclone V device on it for around 30$.
Ok, for that price it has the bear minimum: 2 buttons, ...
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Cyclone V FPGA SocKit - trying to use LCD from FPGA
I'm trying to use the LCD screen on a SocKit board with a Cyclone V FPGA.
However, in the documentation I see that the chip is divided into an HPS and the FPGA and the LCD seems to be connected only ...
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Generate sine wave in VHDL, with the use of 10-bits DAC [closed]
I want to generate a sine wave with 20Mhz frequency, using a FPGA (Cyclone 3 EP3C10E) and an external 10bit DAC converter (http://www.analog.com/static/imported-files/data_sheets/AD7533.pdf).
I have ...
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PCIe fails on "polling compliance" state
I am using the PCIe block of Altera Cyclone IV FPGA, and I have an issue whereby about half the PCIe slots I have tried (on three different computers) do not work.
Debugging with SignalTap shows that ...
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JTAG Design for altera cyclone 3
I am designing the JTAG for a Altera Cyclone 3 (EP3C5E144C8N). I was only aiming at normal JTAG, and do not need Active Serial. I have attached the schematic and board in the *.zip file (http://www....
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symbols for ep3c5e144 and ep3c25e144 in Eagle
I am using ep3c5e144 to design a PCB board. Sadly, in Eagle I cant find the exact library and symbol for this device, but only its near relative ep3c25e144.
I have some questions:
How different is ...
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