Initial commit

.gitignore

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+
+/build
+

.gitmodules

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+[submodule "libs/pico-sdk"]
+	path = libs/pico-sdk
+	url = https://github.com/raspberrypi/pico-sdk.git

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+# initialize the SDK based on PICO_SDK_PATH
+# note: this must happen before project()
+include(libs/pico-sdk/pico_sdk_init.cmake)
+
+project(my_project)
+
+# initialize the Raspberry Pi Pico SDK
+pico_sdk_init()
+
+add_executable(my_project
+    src/main.c
+)
+
+# Add pico_stdlib library which aggregates commonly used features
+target_link_libraries(my_project pico_stdlib)
+
+# create map/bin/hex/uf2 file in addition to ELF.
+pico_add_extra_outputs(my_project)

init.sh

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+#!/bin/bash
+
+modules=$(git config -f .gitmodules --list | grep -E '^submodule\.')
+
+for moduleUrl in $(echo "$modules" | grep '\.url=')
+do
+   moduleName=$(echo "$moduleUrl" | sed -e 's/^submodule\.\(.*\).url=\(.*\)$/\1/')
+   moduleUrl=$(echo "$moduleUrl" | sed -e 's/^submodule\.\(.*\).url=\(.*\)$/\2/')
+   modulePath=$(echo "$modules" | grep ".*$moduleName\.path=" | sed -e 's/^.*path=\(.*\)$/\1/')
+
+   echo "$moduleUrl -> $modulePath"
+   git submodule add "$moduleUrl" "$modulePath"
+done
+
+git submodule init
+git submodule update

src/main.c

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+#include <stdio.h>
+#include "pico/stdlib.h"
+
+// pin rgb led on Seeed XIAO RP2040
+#define PIN_RGB_R 17
+#define PIN_RGB_G 16
+#define PIN_RGB_B 25
+
+int main() {
+  setup_default_uart();
+  printf("Hello, world!\n");
+
+  gpio_init(PIN_RGB_R);
+  gpio_set_dir(PIN_RGB_R, GPIO_OUT);
+  gpio_init(PIN_RGB_G);
+  gpio_set_dir(PIN_RGB_G, GPIO_OUT);
+  gpio_init(PIN_RGB_B);
+  gpio_set_dir(PIN_RGB_B, GPIO_OUT);
+  while (true)
+  {
+    gpio_put(PIN_RGB_G, 1);
+    sleep_ms(250);
+    gpio_put(PIN_RGB_R, 0);
+    sleep_ms(250);
+    gpio_put(PIN_RGB_B, 1);
+    sleep_ms(250);
+    gpio_put(PIN_RGB_G, 0);
+    sleep_ms(250);
+    gpio_put(PIN_RGB_R, 1);
+    sleep_ms(250);
+    gpio_put(PIN_RGB_B, 0);
+    sleep_ms(250);
+  }
+  return 0;
+}
+