Add gtkwave visualisation for module gpu

.gitignore

@@ -5,4 +5,7 @@ test/logs/*
 gds/**/*.gltf
 
 .DS_Store
-results.xml
+results.xml
+
+*.vcd
+*.gtkw

Makefile

@@ -19,7 +19,8 @@ compile:
 compile_%:
 	sv2v -w build/$*.v src/$*.sv
 
-# TODO: Get gtkwave visualizaiton
+.SECONDEXPANSION:
 
-show_%: %.vcd %.gtkw
+# A .gtkw file is optional
+show_%: %.vcd $$(wildcard $$*.gtkw)
 	gtkwave $^

src/gpu.sv

@@ -72,6 +72,11 @@ module gpu #(
     reg [NUM_FETCHERS-1:0] fetcher_read_ready;
     reg [PROGRAM_MEM_DATA_BITS-1:0] fetcher_read_data [NUM_FETCHERS-1:0];
 
+    initial begin
+        $dumpfile("gpu.vcd");
+        $dumpvars(0, gpu);
+    end
+
     // Device Control Register
     dcr dcr_instance (
         .clk(clk),

test/helpers/setup.py

@@ -13,7 +13,7 @@ async def setup(
     threads: int
 ):
     # Setup Clock
-    clock = Clock(dut.clk, 25, units="us")
+    clock = Clock(dut.clk, 10, units="ns")
     cocotb.start_soon(clock.start())
 
     # Reset

test/test_matmul.py

@@ -6,7 +6,7 @@
 from .helpers.logger import logger
 
 @cocotb.test()
-async def test_matadd(dut):
+async def test_matmul(dut):
     # Program Memory
     program_memory = Memory(dut=dut, addr_bits=8, data_bits=16, channels=1, name="program")
     program = [