radio: inital commit

CMakeLists.txt

@@ -23,3 +23,6 @@ add_compile_options(-Wall
         -Wno-unused-function # we have some for the docs that aren't called
         -Wno-maybe-uninitialized
         )
+
+# add all project dirs
+add_subdirectory(radio)

radio/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_executable(radio
+        main.c
+        )
+
+# pull in common dependencies
+target_link_libraries(radio pico_stdlib)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(radio)

radio/main.c

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/stdlib.h"
+
+int main() {
+#ifndef PICO_DEFAULT_LED_PIN
+#warning blink example requires a board with a regular LED
+#else
+    const uint LED_PIN = PICO_DEFAULT_LED_PIN;
+    gpio_init(LED_PIN);
+    gpio_set_dir(LED_PIN, GPIO_OUT);
+    while (true) {
+        gpio_put(LED_PIN, 1);
+        sleep_ms(250);
+        gpio_put(LED_PIN, 0);
+        sleep_ms(250);
+    }
+#endif
+}