first commit, configure cmake

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Pico Debug",
+            "type":"cortex-debug",
+            "cwd": "${workspaceRoot}",
+            "executable": "${command:cmake.launchTargetPath}",
+            "request": "launch",
+            "servertype": "external",
+            // Connect to an already running OpenOCD instance
+            "gdbTarget": "10.0.2.129:3333",
+            "svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
+            "runToMain": true,
+            // Work around for stopping at main on restart
+            "postRestartCommands": [
+                "break main",
+                "continue"
+            ]
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,23 @@
+{
+    // These settings tweaks to the cmake plugin will ensure
+    // that you debug using cortex-debug instead of trying to launch
+    // a Pico binary on the host
+    "cmake.statusbar.advanced": {
+        "debug": {
+            "visibility": "hidden"
+        },
+        "launch": {
+            "visibility": "hidden"
+        },
+        "build": {
+            "visibility": "hidden"
+        },
+        "buildTarget": {
+            "visibility": "hidden"
+        }
+    },
+    "cmake.buildBeforeRun": true,
+    "C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools",
+    "cmake.configureOnOpen": true,
+    "cortex-debug.gdbPath": "gdb-multiarch"
+}

CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.12)
+
+# Pull in SDK (must be before project)
+include(pico_sdk_import.cmake)
+
+project(pico_examples C CXX ASM)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+
+# Initialize the SDK
+pico_sdk_init()
+
+add_subdirectory(src)

include/defines.h

@@ -0,0 +1,2 @@
+#define DEBUG
+

pico_sdk_import.cmake

@@ -0,0 +1,62 @@
+# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
+
+# This can be dropped into an external project to help locate this SDK
+# It should be include()ed prior to project()
+
+if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
+    set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
+    message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
+endif ()
+
+if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
+    set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
+    message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
+endif ()
+
+if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
+    set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
+    message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
+endif ()
+
+set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
+set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
+set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
+
+if (NOT PICO_SDK_PATH)
+    if (PICO_SDK_FETCH_FROM_GIT)
+        include(FetchContent)
+        set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
+        if (PICO_SDK_FETCH_FROM_GIT_PATH)
+            get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
+        endif ()
+        FetchContent_Declare(
+                pico_sdk
+                GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
+                GIT_TAG master
+        )
+        if (NOT pico_sdk)
+            message("Downloading Raspberry Pi Pico SDK")
+            FetchContent_Populate(pico_sdk)
+            set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
+        endif ()
+        set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
+    else ()
+        message(FATAL_ERROR
+                "SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
+                )
+    endif ()
+endif ()
+
+get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
+if (NOT EXISTS ${PICO_SDK_PATH})
+    message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
+endif ()
+
+set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
+if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
+    message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
+endif ()
+
+set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
+
+include(${PICO_SDK_INIT_CMAKE_FILE})

src/CMakeLists.txt

@@ -0,0 +1,11 @@
+#add executable for main
+add_executable(emon main.cpp)
+
+# Pull in our pico_stdlib which aggregates commonly used features
+target_link_libraries(emon pico_stdlib)
+
+# create map/bin/hex/uf2 file etc.
+pico_add_extra_outputs(emon)
+
+# add url via pico_set_program_url
+example_auto_set_url(emon)

src/main.cpp

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+#include<pico/stdlib.h>
+
+int main(){
+    tdio_init_all();
+    const uint LED_PIN = PICO_DEFAULT_LED_PIN;
+    gpio_init(LED_PIN);
+    gpio_set_dir(LED_PIN, GPIO_OUT);
+    bool s=false;
+    uint32_t i=0;
+    while (true) {
+        printf("[%u] Hello, world!\n",i++);
+        gpio_put(LED_PIN,s);
+        s = s ? false : true;
+        sleep_ms(1000);
+    }
+    return 0;
+}