# lwip_ptp_v1_master

## 概述

本示例展示PTP V1 Master的功能

- Master与Slave通过PTP协议通讯，从而实现Slave端的时钟同步

## 硬件设置

* 使用USB Type-C线缆连接PC USB端口和PWR DEBUG端口
* 使用以太网线缆连接开发板RGMII或者RMII端口和另一个块开发板的RGMII或RMII端口

## 工程配置

- 以太网端口配置：参考 [以太网通用工程设置](../../../doc/Ethernet_Common_Project_Settings_zh.md)
- 以太网DHCP配置
    - lwIP sample:  在`CMakeLists.txt`中，支持如下配置:
      - sdk_compile_definitions(-DLWIP_DHCP=0): 禁用DHCP功能
      - sdk_compile_definitions(-DLWIP_DHCP=1): 启用DHCP功能


## 运行示例

* 编译下载程序
* 串口终端显示如下信息：

  ```console
  This is an ethernet demo: PTP V1 Master
  LwIP Version: 2.1.2
  Enet phy init passed !
  Link Status: Up
  Link Speed:  1000Mbps
  Link Duplex: Full duplex
  IPv4 Address: 192.168.100.10
  IPv4 Netmask: 255.255.255.0
  IPv4 Gateway: 192.168.100.1
  (D 1651074124.010753180) event POWER UP
  (D 1651074124.014336740) initClock
  (D 1651074124.017499900) state PTP_INITIALIZING
  (D 1651074124.021785540) manufacturerIdentity: PTPd;1.0.1
  (D 1651074124.026943940) netShutdown
  (D 1651074124.030266580) netInit
  (D 1651074124.033355900) initData
  (D 1651074124.036429900) initTimer
  (D 1651074124.039572540) initClock
  (D 1651074124.042730740) sync message interval: 1000
  (D 1651074124.047452300) clock identifier: DFLT
  (D 1651074124.051735060) 256*log2(clock variance): -4000
  (D 1651074124.056798180) clock stratum: 4
  (D 1651074124.060553660) clock preferred?: no
  (D 1651074124.064655900) bound interface name:
  (D 1651074124.068934340) communication technology: 1
  (D 1651074124.073648380) uuid: cc:00:00:00:80:85
  (D 1651074124.078024060) PTP subdomain name: _DFLT
  (D 1651074124.082563780) subdomain address: 224.0.1.129
  (D 1651074124.087540660) event port address: 3f 1
  (D 1651074124.091993740) general port address: 40 1
  (D 1651074124.096623660) initClock
  (D 1651074124.099763180) state PTP_LISTENING
  (D 1651074124.103781220) initClock
  (D 1651074124.106920900) state PTP_MASTER
  ```