PICO_BOARD can be overriden with "pico2_w"

docs/plat_picow.md

@@ -18,6 +18,8 @@ You need to install Pico SDK. The instructions are different for Linux/macOS and
 
 === "Pico SDK for Linux / macOS"
 
+Recommended: Use Pico SDK v2.1.0 or newer.
+
     Clone Pico SDK from Github: <https://github.com/raspberrypi/pico-sdk>
 
     ```sh

examples/pico_w/CMakeLists.txt

@@ -1,9 +1,10 @@
 cmake_minimum_required(VERSION 3.13)
 
-# PICO_BOARD should be set to 'pico_w', or not set at all.
-if(DEFINED PICO_BOARD AND NOT ${PICO_BOARD} STREQUAL "pico_w")
-    message(FATAL_ERROR "PICO_BOARD must be set to 'pico_w' or not set at all")
+# PICO_BOARD should be set to 'pico_w', 'pico2_w' or not set at all.
+if(DEFINED PICO_BOARD)
+    message(DEBUG, "Using PICO_BOARD ${PICO_BOARD}")
 else()
+    message(VERBOSE, "PICO_BOARD not defined. Using 'pico_w'")
     set(PICO_BOARD "pico_w")
 endif()
 

examples/pico_w/README.md

@@ -4,6 +4,8 @@
 
 You need to install Pico SDK. The instructions are different for Linux/macOS and Windows.
 
+Recommended: Use Pico SDK 2.1 or newer.
+
 ### Pico SDK for Linux / macOS
 
 Install Pico SDK: https://github.com/raspberrypi/pico-sdk
@@ -32,6 +34,14 @@ cmake ..
 make -j
 ```
 
+If `PICO_BOARD` is not specified,  it will use `pico_w`. To compile it for Pico 2 W, do:
+
+```sh
+# From the recently crated "build" folder
+cmake -DPICO_BOARD=pico2_w ..
+make -j
+```
+
 Copy `build/bluepad32_picow_example_app.uf2` to Pico W.
 
 Use this guide if you are not sure how to do it:
@@ -43,5 +53,5 @@ Use this guide if you are not sure how to do it:
 - Example code: licensed under Public Domain.
 - Bluepad32: licensed under Apache 2.
 - BTstack:
-  - Commercial license is already paid by the Raspberry Pi foundation, but only when used in a Pico W.
+  - Commercial license is already paid by the Raspberry Pi foundation, but only when used in a Pico W or Pico 2 W.
   - <https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/pico_btstack/LICENSE.RP>