Add sample C project

CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.13)
+
+include($ENV{PICO_SDK_PATH}/external/pico_sdk_import.cmake)
+
+project(sample C CXX ASM)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+
+pico_sdk_init()
+
+add_executable(sample main.c)
+
+pico_enable_stdio_usb(sample 1)
+pico_enable_stdio_uart(sample 1)
+pico_add_extra_outputs(sample)
+
+target_link_libraries(sample pico_stdlib)

README.md

@@ -1,4 +1,4 @@
-# Raspberry Pi Pico Docker
+# Raspberry Pi Pico Docker SDK
 
 ## Run Docker container
 
@@ -9,3 +9,17 @@ docker run -d -it --name pico-sdk --mount type=bind,source=${PWD},target=/home/d
 
 docker exec -it pico-sdk /bin/sh
 ```
+
+## Project build
+
+After attaching to SDK container run the following command to build the project:
+```
+cd /home/dev
+
+mkdir build
+
+cd build
+
+cmake .. && make -j4
+
+```

main.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+#include "pico/binary_info.h"
+
+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();
+    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);
+    }
+}
+