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本文來源電子發(fā)燒友社區(qū)，作者：小水滴1016，帖子地址：https://bbs.elecfans.com/jishu_2008655_1_1.html

弄了半天，VSCode中還是識別不了串口，只好放棄，采用Ubuntu中編譯，Windows中使用HiBurn來燒寫。

拿到開發(fā)板通常第一件事兒都是寫個helloWorld的程序，點個燈
我也不例外，搞了個跑馬燈。
代碼如下：
led_demo.c

#include
#include
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#define LED_TASK_STACK_SIZE 512
#define LED_TASK_PRIO 25
enum LedState {
LED_ON = 0,
LED_OFF,
LED_SPARK,
};
static void *LedTask(const char *arg)
{
(void)arg;
while (1) {
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_10, 1);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 0);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_12, 0);
usleep(300000);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_10, 0);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 0);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_12, 1);
usleep(300000);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_10, 0);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 1);
GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_12, 0);
usleep(300000);
}
return NULL;
}
static void led_demo(void)
{
osThreadAttr_t attr;
GpioInit();
IoSetFunc(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_IO_FUNC_GPIO_10_GPIO);
IoSetFunc(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_IO_FUNC_GPIO_11_GPIO);
IoSetFunc(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_IO_FUNC_GPIO_12_GPIO);
GpioSetDir(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_GPIO_DIR_OUT);
GpioSetDir(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_DIR_OUT);
GpioSetDir(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_GPIO_DIR_OUT);
attr.name = "LedTask";
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL;
attr.stack_size = LED_TASK_STACK_SIZE;
attr.priority = LED_TASK_PRIO;
if (osThreadNew((osThreadFunc_t)LedTask, NULL, &attr) == NULL) {
printf("[LedExample] Falied to create LedTask!
");
}
}
SYS_RUN(led_demo);

復(fù)制代碼

led_demo文件夾中

BIULD.gn

# 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.
static_library("led_demo") {
sources = [
"led_demo.c"
]
include_dirs = [
"http://utils/native/lite/include",
"http://kernel/liteos_m/components/cmsis/2.0",
"http://base/iot_hardware/interfaces/kits/wifiiot_lite",
]
}

復(fù)制代碼

同時，也要將app文件夾中的編譯腳本文件BUILD.gn修改一下，在features中添加以下內(nèi)容：
"led_demo:led_demo",

# 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("http://build/lite/config/component/lite_component.gni")
lite_component("app") {
features = [
"startup",
"led_demo:led_demo",
]
}

復(fù)制代碼

添加完之后，返回CODE-1.0目錄，在終端中輸入以下命令：python build.py wifiiot
編譯即可；
然后，返回Windows，用hiburn燒錄即可。
第三篇完結(jié)，下一步，OLED，未完待續(xù)……

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