Update documentation

Sming/Arch/Rp2040/Components/uf2/component.mk

@@ -9,7 +9,7 @@ DEBUG_VARS += UF2CONV_PY
 UF2CONV_PY := $(COMPONENT_PATH)/uf2conv.py
 
 
-# Invoke uf2conf utility
+# Invoke uf2conv utility
 # $1 -> Parameters
 ifdef WSL_ROOT
 Uf2Conv = powershell.exe -Command "$(PYTHON) $(UF2CONV_PY) $(if $V,--verbose) $1"

Sming/Components/terminal/README.rst

@@ -33,6 +33,7 @@ Options
 .. envvar:: TERMINAL
 
    Command line to use when running ``make terminal``.
+   This is normally empty (undefined) which causes the default python terminal application to run.
    Redefine if you want to use a different terminal application.
 
 .. envvar:: KILL_TERM

docs/source/getting-started/windows/wsl.rst

@@ -91,14 +91,25 @@ This will ensure that the build system can run python scripts either in WSL2 or
 Flashing devices
 ----------------
 
-WSL2 does not currently support access to USB serial devices, so the Sming build system runs
+WSL2 does not natively support access to USB serial devices, so the Sming build system runs
 the appropriate application directly under Windows using ``powershell.exe``.
 
 Therefore, use the normal Windows COM port name rather than the linux ones (such as /dev/ttyUSB0)::
 
    make flash COM_PORT=COM4
 
 
+Some USB serial adapters are supported by the `usbipd <https://github.com/dorssel/usbipd-win>`__ project.
+If so, then devices such as ``/dev/ttyUSB0``, etc. will be present as usual.
+If Sming sees that ``COM_PORT`` actually exists when running in WSL2 then the above powershell workaround
+will not be used.
+
+.. note::
+
+   The :envvar:`TERMINAL` environment variable is cached by Sming so if the terminal isn't running as expected
+   try ``make config-clean`` to clear the cached value.
+
+
 Serial debugging
 ----------------