RAM designs that are targeted towards architectures that contain these dedicated The TriMatrix memory blocks in the newest devices from Altera are synchronous, So I post my findings here.Īltera recommends using synchronous memory blocks for Altera designs. I wanted to reply, but had some problems with my Altera account and could not do it. PS: I found that someone had reported the same problem at the Altera forum, but nobody replied.
So, next I have to modify the source code so that it works with FFT megacore v9.1. And it seems that FFT megacore v9.1 is not compatible with the version 2.1.3.
In my Quartus installation, I can only find FFT MegaCore v9.1 IP. I also checked the source code, and found that indeed FFT megacore v2.1.3 was used. According to the README file of the example design, this design expects that we use FFT MegaCore v2.1.3. At my PC, the path is something like "C:/Altera/91/.".Įven after correcting the path, the compilation still failed. "C:/software/altera/MegaCore/fft-v2.1.3/lib/fft_pack.vhd"Of course, this path is different from the path at my PC. If we check the project QSF file, we will find that the FFT megacore function is to be found at This post is concerning this Altera example design Verilog: FFT With 32K-Point Transform LengthĪfter I downloaded the code, I compiled the design using Quartus II v9.1, and got the following messages:Įrror: Node instance "asj_fft_dualstream_inst" instantiates undefined entity "asj_fft_dualstream"I found that this is due to the FFT MegaCore Function user library. The current size limit can be shown by typing the following command: $ ulimit -cĬore files can be loaded into the GNU Debugger gdb with the following command: $ gdb EXECUTABLE-FILE CORE-FILE If the size limit is set to zero, no core files are produced. In the GNU Bash shell the command ulimit -c controls the maximum size of core files. Some systems are configured not to write core files by default, since the files can be large and rapidly fill up the available disk space on a system. Why I did not see core files in my Linux? When a program exits abnormally the operating system can write out a core file, usually named 'core', which contains the in-memory state of the program at the time it crashed.What is the use of core file?Ĭombined with information from the symbol table produced by -g (GCC option), the core file can be used to find the line where the program stopped, and the values of its variables at that point.
Source: How to examine core files - a tutorial bin/csh Source: see here How to set environment variables in Bash?ĭepending on your needs, you can make a temporary or a lasting change. bin/bash And on another workstation I am using, the command gives the following: $ echo $SHELL For example, on my desktop PC, the command gives the following: $ echo $SHELL The command echo $SHELL will tell you which shell you are using now. (From Advanced Bash-Scripting Guide, see here)What shell am I using now? Among other things, such a shell reads startup files on activation, displays a prompt, and enables job control by default. bashrc?Īn interactive shell reads commands from user input on a tty. (From Advanced Bash-Scripting Guide, see here) The ~/.bashrc file determines the behavior of interactive shells.
(From Wikipedia, see here) On my desktop PC running Redhat Linux 9, the tty command get the following output: $ tty The name of the program comes from teletypewriter, abbreviated "TTY". Tty is a Unix command that prints to standard output the name of the file connected to standard input.