2022-04-19T19:58:40

06_timer/.gitignore

@@ -0,0 +1 @@
+/build

06_timer/.vscode/c_cpp_properties.json

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+{
+    "configurations": [
+        {
+            "name": "Linux GCC ARM",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "${env:PICO_SDK_PATH}/src/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "linux-gcc-arm",
+            "configurationProvider": "ms-vscode.cmake-tools"
+        }
+    ],
+    "version": 4
+}

06_timer/.vscode/settings.json

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+{
+    "files.associations": {
+        "gpio.h": "c"
+    }
+}

06_timer/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+include(pico_sdk_import.cmake)
+
+project(timer C CXX ASM)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+pico_sdk_init()
+
+add_executable(timer
+    src/timer.c
+)
+
+pico_set_program_name(timer "Timer")
+pico_set_program_version(timer "0.1.0")
+
+pico_enable_stdio_usb(timer 1) # 표준 출력을 USB로
+pico_enable_stdio_uart(timer 0) # 표준 출력을 UART로, 안함.
+
+pico_add_extra_outputs(timer)
+
+target_link_libraries(timer pico_stdlib)

06_timer/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 ()
+
+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})

06_timer/run

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+#!/usr/bin/bash
+export PICO_SDK_PATH="/media/elex/UltraFit/pico-sdk"
+
+function fn_clean {
+    if [ -d ./build ]
+    then
+        rm -r ./build    
+    fi
+    mkdir build
+}
+
+function fn_cmake {
+    cd build
+    cmake ..
+    cd ..
+}
+
+function fn_make {
+    cd build
+    make
+    cd ..
+}
+
+if [ -z $1 ]
+then
+    fn_clean
+    fn_cmake
+    fn_make
+elif [ $1 == 'clean' ]
+then
+    echo 'Cleaning build dir.'
+    fn_clean
+elif [ $1 == 'cmake' ]
+then
+    echo 'Exec cmake'
+    fn_cmake
+elif [ $1 == 'make' ]
+then
+    echo 'Exec make'
+    fn_make
+else
+    echo 'What do you want???'
+fi

06_timer/src/timer.c

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+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "pico/time.h"
+#include "hardware/timer.h"
+#include "pico/binary_info.h"
+
+// 알람 고유 번호와 사용자 데이터를 매개 변수로 전달 받습니다.
+int64_t alarm_callback(alarm_id_t id, void *user_data)
+{
+    printf("Timer %d fired!\n", (int)id);
+
+    // 반환값으로 마이크로 초 단위의 값을 사용해서 경과 시간 후 다시 실행되도록 지정할 수 있습니다.
+    return 0;
+}
+
+bool repeating_timer_callback(struct repeating_timer *t)
+{
+    printf("Repeat at %lld\n", time_us_64());
+    // false를 반환하면 반복이 중단됩니다.
+    return true;
+}
+
+int main()
+{
+    bi_decl(bi_program_description("Timer"));
+
+    stdio_init_all();
+    alarm_pool_init_default();
+
+    alarm_id_t alarmId = add_alarm_in_ms(10000, alarm_callback, NULL, false);
+
+    struct repeating_timer timer;
+    add_repeating_timer_ms(1500, repeating_timer_callback, NULL, &timer);
+
+    while (true)
+    {
+        printf("Currently, %u", time_us_32());
+        sleep_ms(1000);
+    }
+}