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、交通灯板蜂鸣器与主控芯片（Pegasus）引脚的对应关系
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210a7ce71fSopenharmony_ci- **蜂鸣器：**GPIO9/PWM0/输出PWM波控制蜂鸣器发出声音
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230a7ce71fSopenharmony_ci## 三、如何编译
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250a7ce71fSopenharmony_ci1. 将此目录下的 `beeper_music_demo.c` 和 `BUILD.gn` 复制到openharmony源码的`applications\sample\wifi-iot\app\iothardware`目录下，
260a7ce71fSopenharmony_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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280a7ce71fSopenharmony_ci```
290a7ce71fSopenharmony_ci    features = [
300a7ce71fSopenharmony_ci        "iothardware:beeper_music_demo",
310a7ce71fSopenharmony_ci    ]
320a7ce71fSopenharmony_ci```
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340a7ce71fSopenharmony_ci3. 在openharmony源码顶层目录执行：`python build.py wifiiot`
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360a7ce71fSopenharmony_ci## 四、运行结果
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380a7ce71fSopenharmony_ci烧录文件后，按下reset按键，程序开始运行，蜂鸣器会播放《两只老虎》
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420a7ce71fSopenharmony_ci### 【套件支持】
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440a7ce71fSopenharmony_ci##### 1. 套件介绍  http://www.hihope.org/pro/pro1.aspx?mtt=8
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460a7ce71fSopenharmony_ci##### 2. 套件购买  https://item.taobao.com/item.htm?id=622343426064&scene=taobao_shop
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480a7ce71fSopenharmony_ci##### 3. 技术资料
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500a7ce71fSopenharmony_ci- Gitee码云网站（OpenHarmony Sample Code等) **https://gitee.com/hihopeorg**
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520a7ce71fSopenharmony_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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540a7ce71fSopenharmony_ci##### 4. 互动交流
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560a7ce71fSopenharmony_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）
570a7ce71fSopenharmony_ci- HiHope开发者社区-论坛 **https://bbs.elecfans.com/group_1429**
580a7ce71fSopenharmony_ci- 润和HiHope售后服务群（QQ：980599547）
590a7ce71fSopenharmony_ci- 售后服务电话（025-52668590）
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