Update blink example to use status_led lib

Author: peterharperuk

blink/CMakeLists.txt

@@ -2,15 +2,34 @@ add_executable(blink
     blink.c
     )
 
-# pull in common dependencies
-target_link_libraries(blink pico_stdlib)
+# You can define PICO_DEFAULT_LED_PIN yourself to add a led to a different GPIO
+#target_compile_definitions(blink PRIVATE
+#   PICO_DEFAULT_LED_PIN=15
+#)
 
-if (PICO_CYW43_SUPPORTED)
-    target_link_libraries(blink pico_cyw43_arch_none)
-endif()
+# pull in common dependencies
+target_link_libraries(blink pico_stdlib pico_status_led)
 
 # create map/bin/hex file etc.
 pico_add_extra_outputs(blink)
 
 # add url via pico_set_program_url
 example_auto_set_url(blink)
+
+add_executable(color_blink
+    color_blink.c
+    )
+
+# You can define PICO_DEFAULT_WS2812_PIN yourself to add a WS2812 led to a normal GPIO
+#target_compile_definitions(color_blink PRIVATE
+#   PICO_DEFAULT_WS2812_PIN=16
+#)
+
+# pull in common dependencies
+target_link_libraries(color_blink pico_stdlib pico_status_led)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(color_blink)
+
+# add url via pico_set_program_url
+example_auto_set_url(color_blink)

blink/blink.c

@@ -5,49 +5,22 @@
  */
 
 #include "pico/stdlib.h"
-
-// Pico W devices use a GPIO on the WIFI chip for the LED,
-// so when building for Pico W, CYW43_WL_GPIO_LED_PIN will be defined
-#ifdef CYW43_WL_GPIO_LED_PIN
-#include "pico/cyw43_arch.h"
-#endif
+#include "pico/status_led.h"
 
 #ifndef LED_DELAY_MS
 #define LED_DELAY_MS 250
 #endif
 
-// Perform initialisation
-int pico_led_init(void) {
-#if defined(PICO_DEFAULT_LED_PIN)
-    // A device like Pico that uses a GPIO for the LED will define PICO_DEFAULT_LED_PIN
-    // so we can use normal GPIO functionality to turn the led on and off
-    gpio_init(PICO_DEFAULT_LED_PIN);
-    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
-    return PICO_OK;
-#elif defined(CYW43_WL_GPIO_LED_PIN)
-    // For Pico W devices we need to initialise the driver etc
-    return cyw43_arch_init();
-#endif
-}
-
-// Turn the led on or off
-void pico_set_led(bool led_on) {
-#if defined(PICO_DEFAULT_LED_PIN)
-    // Just set the GPIO on or off
-    gpio_put(PICO_DEFAULT_LED_PIN, led_on);
-#elif defined(CYW43_WL_GPIO_LED_PIN)
-    // Ask the wifi "driver" to set the GPIO on or off
-    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, led_on);
-#endif
-}
-
 int main() {
-    int rc = pico_led_init();
-    hard_assert(rc == PICO_OK);
+    bool rc = status_led_init();
+    hard_assert(rc);
     while (true) {
-        pico_set_led(true);
+        status_led_set_state(true);
         sleep_ms(LED_DELAY_MS);
-        pico_set_led(false);
+        assert(status_led_get_state());
+        status_led_set_state(false);
         sleep_ms(LED_DELAY_MS);
+        assert(!status_led_get_state());
     }
+    status_led_deinit();
 }

blink/color_blink.c

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/stdlib.h"
+#include "pico/status_led.h"
+
+#if !PICO_COLORED_STATUS_LED_AVAILABLE
+#warning The color_blink example requires a board with a WS2812 LED
+#endif
+
+#ifndef LED_DELAY_MS
+#define LED_DELAY_MS 250
+#endif
+
+int main() {
+    bool rc = status_led_init();
+    hard_assert(rc);
+    hard_assert(colored_status_led_supported()); // This assert fails if your board does not have WS2812 support
+    uint32_t count = 0;
+    while (true) {
+        // flash red then green then blue
+        uint32_t color = PICO_COLORED_STATUS_LED_COLOR_FROM_RGB(count % 3 == 0 ? 0xaa : 0, count % 3 == 1 ? 0xaa : 0, count % 3 == 2 ? 0xaa : 0); 
+        colored_status_led_set_on_with_color(color);
+        count++;
+        sleep_ms(LED_DELAY_MS);
+        assert(colored_status_led_get_state());
+        colored_status_led_set_state(false);
+        sleep_ms(LED_DELAY_MS);
+        assert(!colored_status_led_get_state());
+    }
+    status_led_deinit();
+}