Remove some references to Pico W (#580)

Refer to Wifi / Bluetooth support instead.

Author: peterharperuk

README.md

@@ -24,9 +24,9 @@ App| Description
 ---|----------------------------------------------------------------------------|---
 [hello_serial](hello_world/serial) | The obligatory Hello World program for Pico (Output over serial version)   |
 [hello_usb](hello_world/usb) | The obligatory Hello World program for Pico (Output over USB version)      | https://rptl.io/pico-hello-usb
-[blink](blink) | Blink an LED on and off. Works on both boards with regular LEDs and Pico W | https://rptl.io/pico-blink
-[blink_simple](blink_simple) | Blink an LED on and off. Does not work on Pico W.                          | https://rptl.io/pico-blink
-[picow_blink](pico_w/wifi/blink) | Blinks the Pico W on-board LED (which is connected via the WiFi chip).     | http://rptl.io/pico-w-blink
+[blink](blink) | Blink a LED on and off. Works on both boards with regular LEDs and boards like Pico W where the led is connected via the Wi-Fi chip | https://rptl.io/pico-blink
+[blink_simple](blink_simple) | Blink a LED on and off. Does not work on boards like Pico W where the led is connected via the Wi-Fi chip. | https://rptl.io/pico-blink
+[picow_blink](pico_w/wifi/blink) | Blinks the on-board LED on boards like Pico W where the led is connected via the Wi-Fi chip. | http://rptl.io/pico-w-blink
 
 ### ADC
 
@@ -170,9 +170,9 @@ App|Description
 [blinky](picoboard/blinky) | Blink "hello, world" in Morse code on Pico's LED
 [button](picoboard/button) | Use Pico's BOOTSEL button as a regular button input, by temporarily suspending flash access.
 
-### Pico W Networking
+### Pico Networking
 
-These examples are for the Pico W, and are only available for `PICO_BOARD=pico_w`
+These networking examples are only available if Wi-Fi is supported by the board.
 
 App|Description
 ---|---
@@ -194,7 +194,7 @@ App|Description
 
 #### FreeRTOS examples
 
-These are examples of integrating Pico W networking under FreeRTOS, and require you to set the `FREERTOS_KERNEL_PATH`
+These are examples of integrating Wi-Fi networking under FreeRTOS, and require you to set the `FREERTOS_KERNEL_PATH`
 to point to the FreeRTOS Kernel. See https://github.com/FreeRTOS/FreeRTOS-Kernel
 
 App|Description
@@ -208,9 +208,9 @@ App|Description
 [pico_freertos_httpd_sys](pico_w/wifi/freertos/httpd) | Runs a LWIP HTTP server test app under FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode.
 [picow_freertos_http_client_sys](pico_w/wifi/freertos/http_client) | Demonstrates how to make a https request in NO_SYS=0 (i.e. full FreeRTOS integration)
 
-### Pico W Bluetooth
+### Pico Bluetooth
 
-These examples are for the Pico W, and are only available for `PICO_BOARD=pico_w`.
+These Bluetooth examples are only available for boards that support Bluetooth.
 They are examples from the Blue Kitchen Bluetooth stack, see [here](https://bluekitchen-gmbh.com/btstack/#examples/examples/index.html) for a full description.
 
 By default, the Bluetooth examples are only built in one "mode" only (*background*, *poll*, or *freertos*), with the 

adc/read_vsys/power_status.h

@@ -11,7 +11,7 @@
  * \brief Get power source
  *
  * Returns whether battery powered
- * \note On Pico W must have called cyw43_arch_init
+ * \note On boards that support Wi-Fi you must have called cyw43_arch_init first
  *
  * \param battery_powered True if powered by battery, False if powered by USB or another means
  * \return Zero if the battery status can be determined, an error code otherwise \see pico_error_codes

pico_w/bt/README.md

@@ -1,4 +1,4 @@
-# Pico W Bluetooth Examples
+# Pico Bluetooth Examples
 
 The source for most of the Bluetooth examples is stored in `pico-sdk/lib/btstack/example`.
 There's a standalone example in `pico-examples/pico_w/bt/standalone`.

pico_w/wifi/access_point/picow_access_point.c

@@ -20,7 +20,7 @@
 #define POLL_TIME_S 5
 #define HTTP_GET "GET"
 #define HTTP_RESPONSE_HEADERS "HTTP/1.1 %d OK\nContent-Length: %d\nContent-Type: text/html; charset=utf-8\nConnection: close\n\n"
-#define LED_TEST_BODY "<html><body><h1>Hello from Pico W.</h1><p>Led is %s</p><p><a href=\"?led=%d\">Turn led %s</a></body></html>"
+#define LED_TEST_BODY "<html><body><h1>Hello from Pico.</h1><p>Led is %s</p><p><a href=\"?led=%d\">Turn led %s</a></body></html>"
 #define LED_PARAM "led=%d"
 #define LED_TEST "/ledtest"
 #define LED_GPIO 0