2022-04-19T19:58:40

02_hello_serial/.vscode/c_cpp_properties.json

@@ -4,7 +4,7 @@
             "name": "Linux GCC ARM",
             "includePath": [
                 "${workspaceFolder}/**",
-                "${workspaceFolder}/../../../pico-sdk/src/**"
+                "${env:PICO_SDK_PATH}/src/**"
             ],
             "defines": [],
             "compilerPath": "/usr/bin/gcc",

02_hello_serial/src/hello.c

@@ -1,9 +1,10 @@
 #include <stdio.h>
+#include <string.h>
 #include "pico/stdlib.h"
 #include "hardware/gpio.h"
 #include "pico/binary_info.h"
 
-const uint LED_PIN = 25;
+const uint LED_PIN = PICO_DEFAULT_LED_PIN;
 
 int main()
 {
@@ -15,12 +16,14 @@ int main()
     gpio_init(LED_PIN);
     gpio_set_dir(LED_PIN, GPIO_OUT);
 
+    char *str = "Hello World!";
+
     while (true)
     {
         gpio_put(LED_PIN, false);
         sleep_ms(250);
         gpio_put(LED_PIN, true);
-        puts("Hello World~~!");
+        puts(str);
         sleep_ms(1000);
     }
-}
+}