Add exercises

SpinalTest/README.md

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+# Prerequisites
+
+- [sbt](https://www.scala-sbt.org/download.html)
+- [Verilator](https://verilator.org/guide/latest/install.html)
+- A Java JDK
+
+More info can be found in the SpinalHDL
+[documentation](https://spinalhdl.github.io/SpinalDoc-RTD/master/SpinalHDL/Getting%20Started/getting_started.html).
+
+On Arch Linux, everything can be installed from the package repositories:
+
+```
+sudo pacman -S sbt verilator jdk-openjdk
+```
+
+The PCs in the CS department have everything installed.
+
+# Test installation
+
+To test code generation (this should create a file called `Counter.v`):
+
+```
+sbt 'runMain spinaltest.Gen'
+```
+
+To test simulation:
+
+```
+sbt 'runMain spinaltest.Sim'
+```
+
+This should print something like the following at the end:
+
+```
+[info] [Progress] Simulation workspace in /.../SpinalTest/./simWorkspace/Counter
+[info] [Progress] Verilator compilation started
+[info] [Progress] Verilator compilation done in 2986.102 ms
+[info] [Progress] Start Counter test simulation with seed 267472656
+[info] counter: 9
+[info] [Done] Simulation done in 23.684 ms
+[success] Total time: 4 s, completed Oct 13, 2022, 11:00:52 AM
+```

SpinalTest/build.sbt

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+name := "SpinalTest"
+version := "0.1"
+
+scalaVersion := "2.11.12"
+val spinalVersion = "1.7.3"
+
+fork := true
+
+libraryDependencies ++= Seq(
+  "com.github.spinalhdl" % "spinalhdl-core_2.11" % spinalVersion,
+  "com.github.spinalhdl" % "spinalhdl-lib_2.11" % spinalVersion,
+  compilerPlugin("com.github.spinalhdl" % "spinalhdl-idsl-plugin_2.11" % spinalVersion)
+)

SpinalTest/src/main/scala/spinaltest/Test.scala

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+package spinaltest
+
+import spinal.core._
+import spinal.core.sim._
+
+class Counter extends Component {
+  val count = out(Reg(UInt(8 bits)).init(0))
+  count := count + 1
+}
+
+object Gen {
+  def main(args: Array[String]) {
+    SpinalVerilog(new Counter)
+  }
+}
+
+object Sim {
+  def main(args: Array[String]) {
+    SimConfig.withWave.compile(new Counter).doSim {dut =>
+      dut.clockDomain.forkStimulus(10)
+      var tick = 0
+
+      while (tick < 10) {
+        dut.clockDomain.waitSampling()
+        tick += 1
+      }
+
+      println(s"counter: ${dut.count.toBigInt}")
+    }
+  }
+}