OpenHarmony轻量系统开发-驱动之GPIO点灯

摘要：本文简单介绍如何操作GPIO去点灯

适合群体：适用于Hi3861开发板，L0轻量系统驱动开发

5.1点灯例程源码

先看最简单得LED灯闪烁操作

源码结构如下：

第一个BUILD.gn文件内容：

static_library("led_demo") {
    sources = [
        "led_demo.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/components/cmsis/2.0",
        "//base/iot_hardware/peripheral/interfaces/kits",
    ]
}

第二个BUILD.gn内容：

# Copyright (c) 2020 Huawei Device Co., Ltd.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import("//build/lite/config/component/lite_component.gni")

lite_component("app") {
    features = [
        "led_demo:led_demo",
    ]
}

led_demo.c内容：

#include <unistd.h>
#include "stdio.h"
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "iot_gpio.h"

#define LED_TEST_GPIO 9 // for hispark_pegasus

void *LedTask(const char *arg)
{
    //初始化GPIO
    IoTGpioInit(LED_TEST_GPIO);