Motivation Somewhere at the bottom of ISE’s xst synthesizer’s report, it says what the maximal frequency is, along with an outline the slowest path. This is a rather nice feature, in particular when attempting to optimize a specific module. There is no such figure given after a regular Vivado synthesis, possibly because the guys at [...]
It’s quite well-known, that in order to call a function in C, which has been compiled in a C++ source file, there’s need for an extern “C” statement. So if this appears on a C++ source file: void my_puts(const char *str) { … } and there’s an attempt to call my_puts() in a plain C [...]
These are a few jots I wrote down as I wrote some code that generates component.xml files automatically. The XML convention of this file IP-XACT format, a specification by the SPIRIT Consortium which can be downloaded free from IEEE. The “spirit:” prefixes all over the XML file indicates that the keywords are defined in the [...]
Introduction My motivation for looking inside Vivado runs was that I wanted to implement a Vivado project from within XEmacs, using the Compile button, and all that within a rather tangled Makefile-based build system. But I also wanted to leave the possibility to open the project using Vivado’s GUI, if something went wrong or needed [...]
I discovered this problem in a project that instantiated a 512-bit wide FIFO consisting many (>16) times in different modules. For some unknown reason (it’s called a bug, I suppose) Vivado treated the instantiation as if it wasn’t there, and optimized all surrounding logic as if the black box’ output ports were all zero. For [...]
Introduction After installing Vivado 2014.1 on my laptop running Ubuntu 14.04 (64 bits), I went for license activation. All I wanted was a plain node-locked license. Not a server, and not a floating one. Baseline. Xilinx abandoned the good old certificate licensing in favor of activation licensing. That is causing some headaches lately… Going through [...]
These are a few jots about constraining in Vivado. With no particular common topic, and in no particular order. Note that I have another post on similar topics. Setting the default IOSTANDARD for all ports In a design where all ports have the same IOSTANDARD, it’s daunting to set them for all. So if there’s [...]
So I installed Vivado on my Centos 6.5 64-bit Linux machine, and even though it promised to install icons on my desktop, it didn’t. This is how I installed them manually. There is surely a simpler way, as the special launch bash scripts I created must be somewhere. But I didn’t bother looking. So it [...]
Background This is yet another war story about making the FSBL boot on a Zynq processor. I had prepared an FSBL for a certain target using SDK 14.6, and then someone needed it in a Vivado package, using the SDK attached to Vivado 2014.1. In a perfect world, I would have exported the system’s configuration [...]
Just a few things I wrote down for myself, as I got acquainted with Vivado 2014.1 (having worked with ISE until now). Kicking off in Linux $ cd trashcan-directory $ . /path/to/Vivado_2014.1/Vivado/2014.1/settings64.sh $ vivado & or running Vivado with a certain Tcl script $ vivado -mode batch -source /path/to/project.tcl or implementing a project without GUI: [...]
