10a7ce71fSopenharmony_ci# HiSpark WiFi-IoT 套件样例开发--PWM(pwm_beer)
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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鸿蒙开发套件](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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90a7ce71fSopenharmony_ci## 一、PWM API
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110a7ce71fSopenharmony_ci| API名称                                                      | 说明              |
120a7ce71fSopenharmony_ci| ------------------------------------------------------------ | ----------------- |
130a7ce71fSopenharmony_ci| unsigned int PwmInit(WifiIotPwmPort port);                   | PWM模块初始化     |
140a7ce71fSopenharmony_ci| unsigned int PwmStart(WifiIotPwmPort port, unsigned short duty, unsigned short freq); | 开始输出PWM信号   |
150a7ce71fSopenharmony_ci| unsigned int PwmStop(WifiIotPwmPort port);                   | 停止输出PWM信号   |
160a7ce71fSopenharmony_ci| unsigned int PwmDeinit(WifiIotPwmPort port);                 | 解除PWM模块初始化 |
170a7ce71fSopenharmony_ci| unsigned int PwmSetClock(WifiIotPwmClkSource clkSource);     | 设置PWM模块时钟源 |
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190a7ce71fSopenharmony_ci## 二、交通灯板蜂鸣器按键与主控芯片(Pegasus)引脚的对应关系
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210a7ce71fSopenharmony_ci- **蜂鸣器:**GPIO9/PWM0
220a7ce71fSopenharmony_ci- **按键:**GPIO8
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240a7ce71fSopenharmony_ci## 三、如何编译
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260a7ce71fSopenharmony_ci1. 将此目录下的 `pwm_beer_demo.c` 和 `BUILD.gn` 复制到openharmony源码的`applications\sample\wifi-iot\app\iothardware`目录下,
270a7ce71fSopenharmony_ci2. 修改openharmony源码的`applications\sample\wifi-iot\app\BUILD.gn`文件,将其中的 `features` 改为:
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290a7ce71fSopenharmony_ci```
300a7ce71fSopenharmony_ci    features = [
310a7ce71fSopenharmony_ci        "iothardware:pwm_beer_demo",
320a7ce71fSopenharmony_ci    ]
330a7ce71fSopenharmony_ci```
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350a7ce71fSopenharmony_ci3. 在openharmony源码顶层目录执行:`python build.py wifiiot`
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370a7ce71fSopenharmony_ci## 四、运行结果
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390a7ce71fSopenharmony_ci烧录文件后,按下reset按键,程序开始运行,按下按键后,蜂鸣器会响,再次按下按键,蜂鸣器不再发出响声
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430a7ce71fSopenharmony_ci### 【套件支持】
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450a7ce71fSopenharmony_ci##### 1. 套件介绍  http://www.hihope.org/pro/pro1.aspx?mtt=8
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470a7ce71fSopenharmony_ci##### 2. 套件购买  https://item.taobao.com/item.htm?id=622343426064&scene=taobao_shop
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490a7ce71fSopenharmony_ci##### 3. 技术资料
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510a7ce71fSopenharmony_ci- Gitee码云网站(OpenHarmony Sample Code等) **https://gitee.com/hihopeorg**
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530a7ce71fSopenharmony_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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550a7ce71fSopenharmony_ci##### 4. 互动交流
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570a7ce71fSopenharmony_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)
580a7ce71fSopenharmony_ci- HiHope开发者社区-论坛 **https://bbs.elecfans.com/group_1429**
590a7ce71fSopenharmony_ci- 润和HiHope售后服务群(QQ:980599547)
600a7ce71fSopenharmony_ci- 售后服务电话(025-52668590)
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