From 95ffb6cecb0b25a5ef27f75586a2f82b51c67838 Mon Sep 17 00:00:00 2001 From: irrlicht Date: Thu, 7 May 2026 21:36:41 +0200 Subject: [PATCH] blinky: erstes Pico-2W-Projekt + README mit Setup-Stolperern Co-Authored-By: Claude Opus 4.7 --- .gitignore | 1 + README.md | 28 ++++++++++++++ blinky/CMakeLists.txt | 18 +++++++++ blinky/blinky.c | 17 +++++++++ blinky/pico_sdk_import.cmake | 73 ++++++++++++++++++++++++++++++++++++ 5 files changed, 137 insertions(+) create mode 100644 README.md create mode 100644 blinky/CMakeLists.txt create mode 100644 blinky/blinky.c create mode 100644 blinky/pico_sdk_import.cmake diff --git a/.gitignore b/.gitignore index 7632c10..1a5f925 100644 --- a/.gitignore +++ b/.gitignore @@ -1 +1,2 @@ reference/* +build/ diff --git a/README.md b/README.md new file mode 100644 index 0000000..39399d9 --- /dev/null +++ b/README.md @@ -0,0 +1,28 @@ +# Zum Bauen benötigt: + +## Toolchain +- cmake +- ninja +- arm-none-eabi-gcc + - Cross-Platform Compiler + - auf Void Linux sind das: cross-arm-none-eabi-gcc cross-arm-none-eabi-newlib cross-arm-none-eabi-libstdc++ + - libstdc++ wird gebraucht, weil das SDK intern einen C++-Stub (`new_delete.cpp`) mitkompiliert +- picotool + - wird zur Build-Zeit gebraucht (UF2-Erzeugung); fehlt es, fetcht das SDK es selbst → Internet beim ersten Build nötig + +## SDK-Submodules +- nach `git clone` der pico-sdk einmalig initialisieren: +- `git submodule update --init --recursive` +- ohne `lib/cyw43-driver` schaltet das SDK `pico_cyw43_arch` ab → `pico/cyw43_arch.h not found` + +## 3 Dateien im Projektordner +- pico_sdk_import.cmake +- CMakeLists.txt +- project.c + +## Board-Variante definieren und bauen +- PICO_BOARD=pico2_w +- PICO_SDK_PATH=/pfad/zur/sdk/pico-sdk +- cmake -S . -B build -G Ninja -DPICO_BOARD=pico2_w +- cmake --build build +- bei Wechsel von `PICO_BOARD` (oder kaputtem Cache): `rm -rf build` vor dem nächsten cmake-Aufruf diff --git a/blinky/CMakeLists.txt b/blinky/CMakeLists.txt new file mode 100644 index 0000000..836ead7 --- /dev/null +++ b/blinky/CMakeLists.txt @@ -0,0 +1,18 @@ +cmake_minimum_required(VERSION 3.13) + +include(pico_sdk_import.cmake) + +project(blinky C CXX ASM) + +pico_sdk_init() + +add_executable(blinky + blinky.c +) + +target_link_libraries(blinky + pico_stdlib + pico_cyw43_arch_none +) + +pico_add_extra_outputs(blinky) diff --git a/blinky/blinky.c b/blinky/blinky.c new file mode 100644 index 0000000..2d22f67 --- /dev/null +++ b/blinky/blinky.c @@ -0,0 +1,17 @@ +#include "pico/stdlib.h" +#include "pico/cyw43_arch.h" + +#define LED_DELAY_MS 250 + +int main(void) { + if (cyw43_arch_init() != 0) { + return -1; + } + + while (true) { + cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, true); + sleep_ms(LED_DELAY_MS); + cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, false); + sleep_ms(LED_DELAY_MS); + } +} diff --git a/blinky/pico_sdk_import.cmake b/blinky/pico_sdk_import.cmake new file mode 100644 index 0000000..65f8a6f --- /dev/null +++ b/blinky/pico_sdk_import.cmake @@ -0,0 +1,73 @@ +# This is a copy of /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 "${CMAKE_SOURCE_DIR}") + endif () + # GIT_SUBMODULES_RECURSE was added in 3.17 + if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0") + FetchContent_Declare( + pico_sdk + GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk + GIT_TAG master + GIT_SUBMODULES_RECURSE FALSE + ) + else () + FetchContent_Declare( + pico_sdk + GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk + GIT_TAG master + ) + endif () + + 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})