microwatt_tutorial: Added extra links, updated info on vcd.

diff --git a/HDL_workflow/microwatt_tutorial.mdwn b/HDL_workflow/microwatt_tutorial.mdwn
index 7393986bb11405c411c05d66616fd1008be1eef9..0ce23ee2f1759fb39649c7b6d5a4de9044c91c26 100644 (file)
--- a/HDL_workflow/microwatt_tutorial.mdwn
+++ b/HDL_workflow/microwatt_tutorial.mdwn
@@ -11,6 +11,7 @@ useful links:
 * [Verilator runtime command documentation](https://verilator.org/guide/latest/exe_sim.html)
 * First steps for working with PowerISA instructions Libre-SOC page:
 [[/docs/firststeps]]
+* Tutorials for how to work with verilator: [part1](https://www.itsembedded.com/dhd/verilator_1/), [part2](https://www.itsembedded.com/dhd/verilator_2/)
 
 ## Development environment scripts
 
@@ -171,9 +172,16 @@ You'll get a message like this:
 
 These snapshots are generated at intervals of every 2,000,000 ticks.
 
-- `microwatt-verilator.vcd` - (TODO: Need to check) - GTKWave waveform file,
-allowing you to look at processor signals and transitions during simulation.
-*Needs to be converted to fst file first*:
+- `microwatt-verilator.vcd` - GTKWave waveform file, allowing you to look at
+processor signals and transitions during simulation.
+Pass `-d` flag to `microwatt-verilator` binary:
+
+    (microwatt):$ ./microwatt-verilator hello_world/hello_world.bin -d
+
+**NOTE**: Trace dumping will generate a large VCD file (about 6GB for the hello
+world example)!
+
+If you want GTKWave to load it faster, convert to fst first:
  
     (microwatt):$ vcd2fst --vcdname=microwatt-verilator.vcd --fstname=microwatt-verilator.fst
     (microwatt):$ gtkwave microwatt-verilator.fst