Add Y diagram

2 files changed, 187 insertions, 3 deletions

diff --git a/tex/model-hardware.tex b/tex/model-hardware.tex
new file mode 100644
index 0000000..df0a220
--- /dev/null
+++ b/tex/model-hardware.tex
@@ -0,0 +1,184 @@
+\section{Development model}
+The workflow for the development is show in figure
+\ref{fig:gajski-kuhn-ychart}. In the Gajski-Kuhn Y-model has 3 axis for the
+perspectives of the product. It is typical to start from the behavioral axis,
+by treating the systems as a black-box, and then to jump back and forth between
+the other axis while gravitating towards the origin (project goal).
+\begin{figure}[h]
+  \centering
+  \resizebox{\linewidth}{!}{
+    \begin{tikzpicture}[
+        font=\ttfamily,
+      ]
+      \draw[gray] node[
+        circle,
+        fill = gray,
+        minimum size = 2mm,
+        outer sep = 0,
+        inner sep = 0,
+      ] (O) at (0,0) {};
+
+      \foreach \r/\desc in {
+        1/{Electrical},
+        2/{Logic gates},
+        3/{Register transfer},
+        4/{Architecture},
+        5/{System}
+      }{
+        \draw[gray, dashed] (O) circle (\r);
+        \draw[gray] (90:\r)
+          node[
+            above = 1mm,
+            align = center,
+            font = \small\ttfamily,
+            fill = white,
+          ] {\desc};
+      }
+
+      \draw[red, thick] (O) to ++(30:6)
+        node[
+          above = 3mm,
+          align = center,
+          text width = 2cm
+        ] {\textbf{Structural Perspective}};
+      \foreach \r/\desc in {
+        1/{Transistors, Wires},
+        2/{Gates, Latches, Flip-Flops},
+        3/{ALUs, Registers, Memories},
+        4/{Subblocks},
+        5/{Top blocks, I/O}
+      } {
+        \draw[red] (30:\r)
+          node[
+            circle, minimum size = 2mm,
+            fill = red,
+            outer sep = 0,
+            inner sep = 0
+          ] {}
+          node[
+            below right = 2mm,
+            align = left,
+            font = \small\ttfamily,
+            fill = white,
+          ] {\desc};
+      }
+
+      \draw[blue, thick] (O) to ++(150:6)
+        node[
+          above = 3mm,
+          align = center,
+          text width = 2cm
+        ] {\textbf{Behavioral Perspective}};
+      \foreach \r/\desc in {
+        1/{Transfer functions},
+        2/{Truth tables, State graphs},
+        3/{Data moves and operations},
+        4/{Subtasks},
+        5/{Algorithm}
+      } {
+        \draw[blue] (150:\r)
+          node[
+            circle, minimum size = 2mm,
+            fill = blue,
+            outer sep = 0,
+            inner sep = 0
+          ] {}
+          node[
+            below left = 2mm,
+            align = right,
+            font = \small\ttfamily,
+            fill = white,
+          ] {\desc};
+      }
+
+      \draw[green!60!black, thick] (O) to ++(270:6)
+        node[
+          below = 3mm,
+          align = center,
+          text width = 2cm
+        ] {\textbf{Physical Perspective}};
+      \foreach \r/\desc in {
+        1/{Mask polygons, Detailed layout},
+        2/{Standard cells, Macro cells},
+        3/{Placement and routing},
+        4/{Floorplan partitioning},
+        5/{Chip or board}
+      } {
+        \draw[green!60!black] (270:\r)
+          node[
+            circle, minimum size = 2mm,
+            fill = green!60!black,
+            outer sep = 0,
+            inner sep = 0
+          ] {}
+          node[
+            right = 2mm,
+            align = left,
+            font = \small\ttfamily,
+            fill = white,
+          ] {\desc};
+      }
+
+    \end{tikzpicture}
+  }
+  \caption{
+    Gajski-Kuhn Y-chart.
+    \label{fig:gajski-kuhn-ychart}
+  }
+\end{figure}
+
+%% TODO: finish picture
+\iffalse
+Figure \ref{fig:asic-design-flow} shows a typical flow diagram of how an ASIC device
+is designed.
+\begin{figure}[h]
+  \begin{tikzpicture}[
+      scale = .7,
+      font = \small\ttfamily,
+      bubble/.style = {
+        rectangle,
+        draw = black, thick,
+        fill = lightgray!10,
+        align = center,
+        text width = 2.1cm,
+        rounded corners = 5pt,
+      },
+      box/.style = {
+        rectangle,
+        draw = black, thick,
+        fill = lightgray!10,
+        align = center,
+        text width = 2.1cm,
+      },
+      lib/.style = {
+        rectangle,
+        draw = black, gray, thick, dashed,
+        fill = lightgray!10,
+        align = center,
+        text width = 2.1cm,
+      },
+      ghost/.style = {
+        outer sep = 0,
+        inner sep = 0,
+      }
+    ]
+    \matrix[row sep = 5mm, column sep = 5mm]{
+      \node[bubble] (dd) {Design Description}; & & \node[bubble] (tbd) {Testbench Description}; \\
+      \node[ghost] (A) {}; & \node[box] (fs) {Functional Simulation}; \\
+      \node[box] (so) {Synthesis \& Optimization}; & \node[lib] (se) {Standard Elements}; \\
+      \node[ghost] (lineA) {}; & & \node[ghost] (lineB) {}; \\
+      \node[box] (tm) {Technology Mapping}; \\
+      \node[box] (ts) {Test Synthesis}; \\
+      \node[bubble] (gates) {}; & \node[box] (pres) {Prelayout Simulation}; \\
+      \node[box] (l) {Layout}; & \node[box] (posts) {Postlayout Simulation}; \\
+      \node[bubble] (design) {}; & & \node[lib] {Technology Library}; \\
+    };
+  \end{tikzpicture}
+  \caption{
+    Design flow for an ASIC device.
+    \label{fig:asic-design-flow}
+  }
+\end{figure}
+\fi
+
+% \section{Hardware}
diff --git a/tex/vhdl.tex b/tex/vhdl.tex
index cb2b389..6feb80e 100644
--- a/tex/vhdl.tex
+++ b/tex/vhdl.tex
@@ -47,13 +47,13 @@ an \emph{architecture}. There can be multiple architectures for a single entity.
 \begin{figure}[h]
   \centering
   \begin{tikzpicture}[
+      font = \ttfamily,
       node distance = 1mm,
       pin/.style = {
         draw = black, fill = white, circle, thick,
         inner sep = 0pt, minimum size = 2mm,
       },
     ]
-    \ttfamily
     \node[
       rectangle, draw = black, thick, fill = gray!20!white,
       minimum width = 4.5cm, minimum height = 4cm,
@@ -227,6 +227,7 @@ for `\reqph{label or {\tt all}}`: use entity `\reqph{library}`.`\reqph{entity}`(
 \begin{figure}[h]
   \centering
   \begin{tikzpicture}[
+      font = \ttfamily,
       node distance = 1mm,
       pin/.style = {
         draw = black, fill = white, circle, thick,
@@ -238,7 +239,6 @@ for `\reqph{label or {\tt all}}`: use entity `\reqph{library}`.`\reqph{entity}`(
         align = center,
       },
     ]
-    \ttfamily
 
     \node[
       draw = black, rectangle, fill = gray!20!white, thick,
@@ -448,8 +448,8 @@ y <= y xor a;
   \end{minipage}
   \begin{minipage}{.4\linewidth}
     \centering
-    \ttfamily
     \begin{tikzpicture}[
+        font = \ttfamily,
         outer sep = 0mm, inner sep = 0mm,
         comp/.style = {
           rectangle, draw = black, thick, fill = gray!20!white,