Gtkwave tutorial
* We collect each bit of PORTB (inputs and outputs) separately. Running GTKWave All you have to do is run this command: gtkwave wave.vd This will run GTKWave and open the waveform file. You can see an example of this in sim/simavr.c in the Pipower project: #include GTKWave is a fully featured GTK+ based wave viewer for Unix and Win32 which reads LXT, LXT2, VZT, FST, and GHW files as well as standard Verilog VCD/EVCD files and allows their viewing. mmcu section of the resulting ELF binary.
Gtkwave tutorial code#
We do this by adding some special code that will get embedded in the. We need to embed some metadata in our code that provides simavr with information about what data we want to collect. In this post, we’ll combine that with the tracing facilities offered by simavr in order to generate traces for pin values and state transitions while the code is running. In the previous post we looked at we can automate gdb using scripts.
You’ll also want to be familiar with the attiny85 or a similar AVR microcontroller, since I’ll be referring to register names (like PORTB) without additional explanation. If you want to follow along, start by cloning that repository: git clone In these posts, I will be referencing the code from my pipower project that I discussed in. compressor gtkwave vlsi testbench iverilog dadda-tree-multiplier. Using simavr to collect information about the state of microcontroller pins while our code is running. 16-bit DADDA Multiplier design using using 5:2 compressor as the major reduction compressor and 4:2 compressor and FullAdder and HalfAdder to simulate 3:2 and 2:2 compressors respectively. GHDL/GTKWave Tutorial Part 3 - VHDL Part 1. The complete series is:Ī walkthrough of using GDB to manually inspect the behavior of our code.Ĭreating GDB scripts to automatically test the behavior of our code. Waveform dumps are written by the Icarus Verilog runtime program vvp. This is the third of three posts about using gdb and simavr to debug AVR code.