From 92876e17653abd7f46126d7419433c628d303cb8 Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Wed, 24 Feb 2021 15:15:24 +0100
Subject: Add exercises for m5 dig

---
 sem6/dig/generate_test_file.py |  7 ++++++-
 sem6/dig/m5/Makefile           |  4 ++++
 sem6/dig/m5/ex2.vhdl           | 25 +++++++++++++++++++++++++
 sem6/dig/m5/ex3.vhdl           | 29 +++++++++++++++++++++++++++++
 4 files changed, 64 insertions(+), 1 deletion(-)
 create mode 100644 sem6/dig/m5/Makefile
 create mode 100644 sem6/dig/m5/ex2.vhdl
 create mode 100644 sem6/dig/m5/ex3.vhdl

diff --git a/sem6/dig/generate_test_file.py b/sem6/dig/generate_test_file.py
index 5a951f2..b97cbe6 100755
--- a/sem6/dig/generate_test_file.py
+++ b/sem6/dig/generate_test_file.py
@@ -113,7 +113,12 @@ architecture behavior of test_{name} is
     def wait():
         tof(f"wait for {td.get('teststep', 1)} fs;")
 
-    for tindex, t in enumerate(td["testin"]):
+    if "testin" in td:
+        enum = enumerate(td["testin"])
+    else:
+        enum = enumerate([1] * td["testcount"])
+
+    for tindex, t in enum:
         # Add clock
         if "clk" in td:
             tof(f"in_{td['clk']} <= '0';")
diff --git a/sem6/dig/m5/Makefile b/sem6/dig/m5/Makefile
new file mode 100644
index 0000000..379436c
--- /dev/null
+++ b/sem6/dig/m5/Makefile
@@ -0,0 +1,4 @@
+
+INPUTFILES=ex2 ex3
+
+include ../common.mk
diff --git a/sem6/dig/m5/ex2.vhdl b/sem6/dig/m5/ex2.vhdl
new file mode 100644
index 0000000..dc295c1
--- /dev/null
+++ b/sem6/dig/m5/ex2.vhdl
@@ -0,0 +1,25 @@
+-- TEST_START{"inputs": [], "outputs": ["output,23,0"], "clk": "clk", "testcount": 100}TEST_STOP
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity ex2 is
+    port (
+        clk: in std_logic;
+        output: out std_logic_vector(23 downto 0)
+    );
+end ex2;
+
+architecture impl of ex2 is
+    signal value: unsigned(23 downto 0) := "000000000000000000000000";
+begin
+    output <= std_logic_vector(value);
+
+    process (clk)
+    begin
+        if (clk'event and clk = '1') then
+            value <= value + 1;
+        end if;
+    end process;
+
+end impl;
diff --git a/sem6/dig/m5/ex3.vhdl b/sem6/dig/m5/ex3.vhdl
new file mode 100644
index 0000000..57465c4
--- /dev/null
+++ b/sem6/dig/m5/ex3.vhdl
@@ -0,0 +1,29 @@
+-- TEST_START{"inputs": [], "outputs": ["output,6,0"], "clk": "clk", "testcount": 100}TEST_STOP
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity ex3 is
+    port (
+        clk: in std_logic;
+        output: out std_logic_vector(6 downto 0)
+    );
+end ex3;
+
+architecture impl of ex3 is
+    signal value: unsigned(6 downto 0) := "0000000";
+begin
+    output <= std_logic_vector(value);
+
+    process (clk)
+    begin
+        if (clk'event and clk = '1') then
+            if (value = 59) then
+                value <= "0000000";
+            else
+                value <= value + 1;
+            end if;
+        end if;
+    end process;
+
+end impl;
-- 
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