Initial commit

.clangd

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+CompileFlags:
+  CompilationDatabase: build

.gitignore

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+build/
+.cache/

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# initialize the SDK based on PICO_SDK_PATH
+# note: this must happen before project()
+include(pico_sdk_import.cmake)
+
+project(police_colors)
+
+# initialize the Raspberry Pi Pico SDK
+pico_sdk_init()
+
+# rest of your project
+#
+
+add_executable(police_colors
+        police_colors.c
+        )
+
+# pull in common dependencies
+target_link_libraries(police_colors pico_stdlib)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(police_colors)

README.md

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+> [!NOTE]
+> If we want to use clangd, we need to modify the cmake command like so:
+> `cmake -DCMAKE_BUILD_TYPE=Debug -DPICO_BOARD=pico ..`
+> clangd needs the option `--query-driver=/usr/bin/arm-none-eabi-g*` to process includes properly, which cannot be set in the .clangd file due to security issues. This needs to be added to the lsp config.
+
+> [!NOTE]
+> Enable debug symbols with `make -j4`
+
+> [!NOTE]
+> Run `echo "adapter speed 10000" | nc localhost 4444` once (after starting the openocd server with `openocd -f interface/cmsis-dap.cfg -f target/rp2040.cfg`) to get faster upload speeds
+
+`tio /dev/ttyACM#` to monitor UART

debug.fish

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+#!/bin/fish
+cd build
+#cmake -DCMAKE_BUILD_TYPE=Debug -DPICO_BOARD=pico ..
+make -j4
+#echo "adapter speed 10000" | nc localhost 4444
+echo "program build/police_colors.elf verify reset" | nc -N localhost 4444 &>/dev/null

pico_sdk_import.cmake

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+# 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 ()
+
+if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_TAG} AND (NOT PICO_SDK_FETCH_FROM_GIT_TAG))
+    set(PICO_SDK_FETCH_FROM_GIT_TAG $ENV{PICO_SDK_FETCH_FROM_GIT_TAG})
+    message("Using PICO_SDK_FETCH_FROM_GIT_TAG from environment ('${PICO_SDK_FETCH_FROM_GIT_TAG}')")
+endif ()
+
+if (PICO_SDK_FETCH_FROM_GIT AND NOT PICO_SDK_FETCH_FROM_GIT_TAG)
+  set(PICO_SDK_FETCH_FROM_GIT_TAG "master")
+  message("Using master as default value for PICO_SDK_FETCH_FROM_GIT_TAG")
+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 "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
+set(PICO_SDK_FETCH_FROM_GIT_TAG "${PICO_SDK_FETCH_FROM_GIT_TAG}" CACHE FILEPATH "release tag for 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 ${PICO_SDK_FETCH_FROM_GIT_TAG}
+                    GIT_SUBMODULES_RECURSE FALSE
+            )
+        else ()
+            FetchContent_Declare(
+                    pico_sdk
+                    GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
+                    GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
+            )
+        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})

police_colors.c

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+#include "pico/stdlib.h"
+#include <pico/stdio_uart.h>
+#include <stdio.h>
+
+#define LED_DELAY_MS 80
+#define LED_WHITE 2
+#define LED_BLUE 3
+#define LED_GREEN 4
+#define LED_RED 5
+
+int pico_led_init(void) {
+  gpio_init(PICO_DEFAULT_LED_PIN);
+  gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+  gpio_init(LED_WHITE);
+  gpio_set_dir(LED_WHITE, GPIO_OUT);
+  gpio_init(LED_BLUE);
+  gpio_set_dir(LED_BLUE, GPIO_OUT);
+  gpio_init(LED_GREEN);
+  gpio_set_dir(LED_GREEN, GPIO_OUT);
+  gpio_init(LED_RED);
+  gpio_set_dir(LED_RED, GPIO_OUT);
+  return PICO_OK;
+}
+
+void pico_set_led(bool led_on) {}
+
+int main() {
+  int rc = pico_led_init();
+  hard_assert(rc == PICO_OK);
+
+  // Set up our UART with the required speed.
+  stdio_uart_init();
+
+  // Normally, a call to sleep_ms would freeze the device
+  // while connected to a debugger. We could use busy_wait_ms
+  // as a work-around, but we'll disable this feature instead.
+  timer_get_instance(0)->dbgpause = 0;
+
+  gpio_put(PICO_DEFAULT_LED_PIN, true);
+
+  for (int i = 0; i < 1000000; i++) {
+    // Send out a string, with CR/LF conversions
+    printf("BEEP BOOP POLICE!!! %d \n\r", i);
+    gpio_put(LED_RED, true);
+    sleep_ms(2);
+    gpio_put(LED_RED, false);
+    sleep_ms(LED_DELAY_MS);
+    gpio_put(LED_RED, true);
+    sleep_ms(2);
+    gpio_put(LED_RED, false);
+    sleep_ms(LED_DELAY_MS);
+    gpio_put(LED_BLUE, true);
+    sleep_ms(2);
+    gpio_put(LED_BLUE, false);
+    sleep_ms(LED_DELAY_MS);
+    gpio_put(LED_BLUE, true);
+    sleep_ms(2);
+    gpio_put(LED_BLUE, false);
+    sleep_ms(LED_DELAY_MS);
+  }
+  return 0;
+}

test.fish

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+#!/bin/fish
+cd build
+make
+#echo "adapter speed 10000" | nc localhost 4444
+echo "program build/police_colors.elf verify reset" | nc -N localhost 4444 &>/dev/null