10a7ce71fSopenharmony_ci# HiSpark WiFi-IoT 套件样例开发--traffic_light_demo
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30a7ce71fSopenharmony_ci![hihope_illustration](https://gitee.com/hihopeorg/hispark-hm-pegasus/raw/master/docs/figures/hihope_illustration.png)
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50a7ce71fSopenharmony_ci[HiSpark WiFi-IoT开发套件](https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w5003-23341819265.1.bf644a82Da9PZK&id=622343426064&scene=taobao_shop) 首发于HDC 2020,是首批支持OpenHarmony 2.0的开发套件,亦是官方推荐套件,由润和软件HiHope量身打造,已在OpenHarmony社区和广大OpenHarmony开发者中得到广泛应用。
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70a7ce71fSopenharmony_ci![wifi_iot](https://gitee.com/hihopeorg/hispark-hm-pegasus/raw/master/docs/figures/2.png)
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110a7ce71fSopenharmony_ci## 一、交通灯板上外设与主控芯片(Pegasus)引脚的对应关系
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130a7ce71fSopenharmony_ci* 交通灯板
140a7ce71fSopenharmony_ci  * GPIO_9 连接蜂鸣器,输出PWM波控制蜂鸣器发出声音
150a7ce71fSopenharmony_ci  * GPIO_8 连接按键,按键中断切换亮的LED灯,同时切换蜂鸣器响或者不响
160a7ce71fSopenharmony_ci  * GPIO_10 连接红色LED,输出高电平点亮红色LED灯
170a7ce71fSopenharmony_ci  * GPIO_11 连接绿色LED,输出高电平点亮绿色LED灯
180a7ce71fSopenharmony_ci  * GPIO_12 连接黄色LED,输出高电平点亮黄色LED灯
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220a7ce71fSopenharmony_ci## 二、如何编译
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240a7ce71fSopenharmony_ci1. 将此目录下的 `traffic_light_demo.c` 和 `BUILD.gn` 复制到openharmony源码的`applications\sample\wifi-iot\app\iothardware`目录下,
250a7ce71fSopenharmony_ci2. 修改openharmony源码的`applications\sample\wifi-iot\app\BUILD.gn`文件,将其中的 `features` 改为:
260a7ce71fSopenharmony_ci```python
270a7ce71fSopenharmony_ci    features = [
280a7ce71fSopenharmony_ci        "iothardware:traffic_light_demo",
290a7ce71fSopenharmony_ci    ]
300a7ce71fSopenharmony_ci```
310a7ce71fSopenharmony_ci3. 在openharmony源码顶层目录执行:`python build.py wifiiot`
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330a7ce71fSopenharmony_ci### 报错解决
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350a7ce71fSopenharmony_ci1. 编译过程中报错:undefined reference to `hi_pwm_init` 等几个 `hi_pwm_`开头的函数,
360a7ce71fSopenharmony_ci	* **原因:** 因为默认情况下,hi3861_sdk中,PWM的CONFIG选项没有打开
370a7ce71fSopenharmony_ci	* **解决:** 修改`vendor\hisi\hi3861\hi3861\build\config\usr_config.mk`文件中的`CONFIG_PWM_SUPPORT`行:
380a7ce71fSopenharmony_ci	  * `# CONFIG_PWM_SUPPORT is not set`修改为`CONFIG_PWM_SUPPORT=y`
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400a7ce71fSopenharmony_ci## 三、运行结果
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420a7ce71fSopenharmony_ci烧录文件后,按下reset按键,程序开始运行:
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440a7ce71fSopenharmony_ci* 交通灯板红黄绿三个灯循环闪烁四次
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460a7ce71fSopenharmony_ci* 按下按键会控制三个灯的亮暗状态以及蜂鸣器的是否会发出声音
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500a7ce71fSopenharmony_ci### 【套件支持】
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520a7ce71fSopenharmony_ci##### 1. 套件介绍  http://www.hihope.org/pro/pro1.aspx?mtt=8
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540a7ce71fSopenharmony_ci##### 2. 套件购买  https://item.taobao.com/item.htm?id=622343426064&scene=taobao_shop
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560a7ce71fSopenharmony_ci##### 3. 技术资料
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580a7ce71fSopenharmony_ci- Gitee码云网站(OpenHarmony Sample Code等) **https://gitee.com/hihopeorg**
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600a7ce71fSopenharmony_ci- HiHope官网-资源中心(SDK包、技术文档下载)[**www.hihope.org**](http://www.hihope.org/)
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620a7ce71fSopenharmony_ci##### 4. 互动交流
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640a7ce71fSopenharmony_ci- 润和HiHope技术交流-微信群(加群管理员微信13605188699,发送文字#申请加入润和官方群#,予以邀请入群)
650a7ce71fSopenharmony_ci- HiHope开发者社区-论坛 **https://bbs.elecfans.com/group_1429**
660a7ce71fSopenharmony_ci- 润和HiHope售后服务群(QQ:980599547)
670a7ce71fSopenharmony_ci- 售后服务电话(025-52668590)