Add SDK test and reorganize repository

test_poject/main.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+#include "pico/binary_info.h"
+
+const int LED_PIN = 25;
+
+int main ()
+{
+    bi_decl(bi_program_description("Sample binary"));
+    bi_decl(bi_1pin_with_name(LED_PIN, "on-board PIN"));
+
+    stdio_init_all();
+
+    gpio_init(LED_PIN);
+    gpio_set_dir(LED_PIN, GPIO_OUT);
+
+    while(1)
+    {
+        gpio_put(LED_PIN, 0);
+        sleep_ms(250);
+        gpio_put(LED_PIN, 1);
+        puts("Hello Word\n");
+        sleep_ms(1000);
+    }
+}
+