# NFC<a name="EN-US_TOPIC_0000001133207781"></a>

-   [Introduction](#section13587125816351)
-   [Architecture](#section13587185873516)
-   [Directory Structure](#section161941989596)
-   [Constraints](#section119744591305)
-   [Usage](#section1312121216216)
-   [Repositories Involved](#section1371113476307)

## Introduction<a name="section13587125816351"></a>

Near-field communication \(NFC\) is a non-contact identification and interconnection technology for short-distance wireless communication between mobile devices, consumer electronic products, PCs, and smart devices.

NFC service provides NFC switch control, NFC tag discovery and dispatch, NFC tag reading and writing, NFC card emulation functions.

## Architecture<a name="section13587185873516"></a>

**Figure  1**  NFC architecture<a name="fig4460722185514"></a>


![](figures/en-us_image_0000001086731550.png)

## Directory Structure<a name="section161941989596"></a>

```
/foundation/communication/nfc
├── interfaces                        # Interface
│   └── inner_api                     # System inner interface
├── frameworks                        # Framework interface
│   └── js                            # Implementation of JS API
│       └── napi                      # Napi implementation of JS API
├── services                          # Service implementation
├── test                              # Test code
├── BUILD.gn                          # Build entry
└── bundle.json                       # Component description
```

## Constraints<a name="section119744591305"></a>

-   The device must have an NFC controller chip to use NFC services.

## Usage<a name="section1312121216216"></a>

-  NFC switch

Please reference: docs/zh-cn/application-dev/reference/apis/js-apis-nfcController.md。

-  NFC tag reading and writing

Please reference: docs/zh-cn/application-dev/reference/apis/js-apis-nfcTag.md。

-  NFC card emulation

Please reference: docs/zh-cn/application-dev/reference/apis/js-apis-cardEmulation.md。

## Repositories Involved<a name="section1371113476307"></a>

hmf/communication/nfc

# NFC组件<a name="ZH-CN_TOPIC_0000001124412109"></a>

-   [简介](#section11660541593)
-   [系统架构](#section342962219551)
-   [目录](#section161941989596)
-   [约束](#section119744591305)
-   [说明](#section1312121216216)
-   [使用说明](#section129654513264)
-   [相关仓](#section1371113476307)

## 简介<a name="section11660541593"></a>

近距离无线通信技术\(Near Field Communication，NFC\) ，是一种非接触式识别和互联技术，可以在移动设备、消费类电子产品、PC和智能设备间进行近距离无线通信。

NFC服务提供NFC开关控制、NFC标签发现和分发、NFC标签读写、NFC卡模拟等业务功能。

## 系统架构<a name="section342962219551"></a>

**图 1**  NFC服务组件架构图<a name="fig444313176464"></a>


![](figures/zh-cn_image_0000001124327253.png)

<a name="table1716174620235"></a>
<table><thead align="left"></thead>
<tbody></tbody>
</table>

## 目录<a name="section161941989596"></a>

```
/foundation/communication/nfc
├── interfaces                        # 接口
│   └── inner_api                     # 系统内部件间接口
├── frameworks                        # 框架层接口
│   └── js                            # JS API的实现
│       └── napi                      # 通过napi封装的JS接口代码实现
├── services                          # NFC服务进程的实现
├── test                              # 测试代码
├── BUILD.gn                          # 编译入口
└── bundle.json                       # 部件描述文件
```

## 约束<a name="section119744591305"></a>

设备必须具备NFC控制器芯片，才能使用NFC服务。

## 说明<a name="section1312121216216"></a>

### 使用说明<a name="section129654513264"></a>

-  NFC开关

参考开发指南: docs/zh-cn/application-dev/reference/apis-connectivity-kit/js-apis-nfcController.md。

-  NFC标签读写

参考开发指南: docs/zh-cn/application-dev/reference/apis-connectivity-kit/js-apis-nfcTag.md。

-  NFC卡模拟

参考开发指南: docs/zh-cn/application-dev/reference/apis-connectivity-kit/js-apis-cardEmulation.md。

## 相关仓<a name="section1371113476307"></a>

hmf/communication/nfc