WS2812 config for status led

Define PICO_STATUS_LED_ONLY_USING_WS2812 to make pico_status_led_set
use the ws2812 color led. This will beforced  off if
PICO_DEFAULT_WS2812_PIN is not defined. It will default to true only
if neither PICO_DEFAULT_LED_PIN or CYW43_WL_GPIO_LED_PIN are defined.

PICO_STATUS_LED_WS2812_ON and PICO_STATUS_LED_WS2812_OFF can be used
to configure the on and off color led picel values.

Author: peterharperuk

src/rp2_common/pico_status_led/include/pico/status_led.h

@@ -28,11 +28,39 @@ struct async_context;
 extern "C" {
 #endif
 
-// PICO_CONFIG: PICO_STATUS_LED_WS2812_WRGB, Inidicate if the colored status led supports WRGB, type=bool, default=false group=pico_status_led
+// PICO_CONFIG: PICO_STATUS_LED_WS2812_WRGB, Indicate if the colored status led supports WRGB, type=bool, default=false group=pico_status_led
 #ifndef PICO_STATUS_LED_WS2812_WRGB
 #define PICO_STATUS_LED_WS2812_WRGB 0
 #endif
 
+// PICO_CONFIG: PICO_STATUS_LED_ONLY_USING_WS2812, Indicate if only the colored status led should be used. Only true by default if a WS2812 pin is defined and no led pin is defined, type=bool group=pico_status_led
+#ifdef PICO_DEFAULT_WS2812_PIN
+#ifndef PICO_STATUS_LED_ONLY_USING_WS2812
+#define PICO_STATUS_LED_ONLY_USING_WS2812 !(defined PICO_DEFAULT_LED_PIN || defined CYW43_WL_GPIO_LED_PIN)
+#endif
+#else
+#undef PICO_STATUS_LED_ONLY_USING_WS2812
+#define PICO_STATUS_LED_ONLY_USING_WS2812 0
+#endif
+
+// PICO_CONFIG: PICO_STATUS_LED_WS2812_ON, pixel color value of WS2812 led when status led is on. Only used when PICO_STATUS_LED_ONLY_USING_WS2812 is true , type=int group=pico_status_led
+#ifndef PICO_STATUS_LED_WS2812_ON
+#if PICO_STATUS_LED_WS2812_WRGB
+#define PICO_STATUS_LED_WS2812_ON PICO_STATUS_LED_WRGB(0xaa, 0, 0, 0)
+#else
+#define PICO_STATUS_LED_WS2812_ON PICO_STATUS_LED_RGB(0xaa, 0xaa, 0xaa)
+#endif
+#endif
+
+// PICO_CONFIG: PICO_STATUS_LED_WS2812_OFF, pixel color value of WS2812 led when status led is off. Only used when PICO_STATUS_LED_ONLY_USING_WS2812 is true , type=int group=pico_status_led
+#ifndef PICO_STATUS_LED_WS2812_OFF
+#if PICO_STATUS_LED_WS2812_WRGB
+#define PICO_STATUS_LED_WS2812_OFF PICO_STATUS_LED_WRGB(0, 0, 0, 0)
+#else
+#define PICO_STATUS_LED_WS2812_OFF PICO_STATUS_LED_RGB(0, 0, 0)
+#endif
+#endif
+
 /*! \brief Initialise the status leds
  *  \ingroup pico_status_led
  *
@@ -44,6 +72,40 @@ extern "C" {
  */
 bool pico_status_led_init(struct async_context *context);
 
+/*! \brief Set the colored status led value
+ *  \ingroup pico_status_led
+ *
+ * The colored status led defaults to off. Use this function to change its color.
+ *
+ * \note: If your hardware does not support a colored status led (\see PICO_DEFAULT_WS2812_PIN), this function does nothing and returns false.
+ *
+ * \param value The color of the colored status led in 0xWWRRGGBB format.
+ * \param True if the coloured status led could be set, otherwise false on failure
+ */
+bool pico_status_led_color_set(uint32_t value);
+
+/*! \brief Get the colored status led value
+ *  \ingroup pico_status_led
+ *
+ * \note: If your hardware does not support a colored status led (\see PICO_DEFAULT_WS2812_PIN), this function always returns 0x0.
+ *
+ * \return The color of the colored status led in 0xWWRRGGBB format.
+ */
+uint32_t pico_status_led_color_get(void);
+
+/*! \brief Generate an RGB colour value for /ref pico_status_led_color_set
+ *  \ingroup pico_status_led
+ */
+#define PICO_STATUS_LED_RGB(R, G, B) (((R) << 16) | ((G) << 8) | (B))
+
+/*! \brief Generate an WRGB colour value for \ref pico_status_led_color_set
+ *
+ *  \note: If your hardware does not support a white pixel, the white component is ignored
+ *
+ *  \ingroup pico_status_led
+ */
+#define PICO_STATUS_LED_WRGB(W, R, G, B) (((W) << 24) | ((R) << 16) | ((G) << 8) | (B))
+
 /*! \brief Set the status led on or off
  *  \ingroup pico_status_led
  *
@@ -53,7 +115,9 @@ bool pico_status_led_init(struct async_context *context);
  * \param True if the status led could be set, otherwise false
  */
 static inline bool pico_status_led_set(bool led_on) {
-#if defined PICO_DEFAULT_LED_PIN
+#if PICO_STATUS_LED_ONLY_USING_WS2812
+    return pico_status_led_color_set(led_on ? PICO_STATUS_LED_WS2812_ON : PICO_STATUS_LED_WS2812_OFF);
+#elif defined PICO_DEFAULT_LED_PIN
     gpio_put(PICO_DEFAULT_LED_PIN, led_on);
     return true;
 #elif defined CYW43_WL_GPIO_LED_PIN
@@ -72,7 +136,9 @@ static inline bool pico_status_led_set(bool led_on) {
  * \return True if the led is on, or False if the led is off
  */
 static inline bool pico_status_led_get(void) {
-#if defined PICO_DEFAULT_LED_PIN
+#if PICO_STATUS_LED_ONLY_USING_WS2812
+    return pico_status_led_color_get() != PICO_STATUS_LED_WS2812_OFF;
+#elif defined PICO_DEFAULT_LED_PIN
     return gpio_get(PICO_DEFAULT_LED_PIN);
 #elif defined CYW43_WL_GPIO_LED_PIN
     bool value = false;
@@ -83,40 +149,6 @@ static inline bool pico_status_led_get(void) {
 #endif
 }
 
-/*! \brief Set the colored status led value
- *  \ingroup pico_status_led
- *
- * The colored status led defaults to off. Use this function to change its color.
- *
- * \note: If your hardware does not support a colored status led (\see PICO_DEFAULT_WS2812_PIN), this function does nothing and returns false.
- *
- * \param value The color of the colored status led in 0xWWRRGGBB format.
- * \param True if the coloured status led could be set, otherwise false on failure
- */
-bool pico_status_led_color_set(uint32_t value);
-
-/*! \brief Get the colored status led value
- *  \ingroup pico_status_led
- *
- * \note: If your hardware does not support a colored status led (\see PICO_DEFAULT_WS2812_PIN), this function always returns 0x0.
- *
- * \return The color of the colored status led in 0xWWRRGGBB format.
- */
-uint32_t pico_status_led_color_get(void);
-
-/*! \brief Generate an RGB colour value for /ref pico_status_led_color_set
- *  \ingroup pico_status_led
- */
-#define PICO_STATUS_LED_RGB(R, G, B) (((R) << 16) | ((G) << 8) | (B))
-
-/*! \brief Generate an WRGB colour value for \ref pico_status_led_color_set
- *
- *  \note: If your hardware does not support a white pixel, the white component is ignored
- *
- *  \ingroup pico_status_led
- */
-#define PICO_STATUS_LED_WRGB(W, R, G, B) (((W) << 24) | ((R) << 16) | ((G) << 8) | (B))
-
 /*! \brief Deinitialise the status leds
  *  \ingroup pico_status_led
  *