reference:library:write
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| — | reference:library:write [2023/06/07 04:24] (当前版本) – 创建 - 外部编辑 127.0.0.1 | ||
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| + | ====== write() ====== | ||
| + | |||
| + | ===== 描述 ===== | ||
| + | |||
| + | |||
| + | 往所有连上服务器的客户端写入数据。数据以字节发送 | ||
| + | |||
| + | ==== 语法 ==== | ||
| + | |||
| + | |||
| + | server.write(val) | ||
| + | server.write(buf, | ||
| + | |||
| + | === 参数 === | ||
| + | |||
| + | |||
| + | val: 以字节发送的值 | ||
| + | |||
| + | buf: 以字节发送的数组 | ||
| + | |||
| + | len: 发送的长度 | ||
| + | |||
| + | == 返回 == | ||
| + | |||
| + | |||
| + | byte | ||
| + | write()返回写入的字节数 . 不是必须的. | ||
| + | |||
| + | == 例子 == | ||
| + | |||
| + | <code cpp> | ||
| + | #include < | ||
| + | #include < | ||
| + | |||
| + | // network configuration. | ||
| + | |||
| + | // the media access control (ethernet hardware) address for the shield: | ||
| + | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; | ||
| + | //the IP address for the shield: | ||
| + | byte ip[] = { 10, 0, 0, 177 }; | ||
| + | // the router' | ||
| + | byte gateway[] = { 10, 0, 0, 1 }; | ||
| + | // the subnet: | ||
| + | byte subnet[] = { 255, 255, 0, 0 }; | ||
| + | |||
| + | // telnet defaults to port 23 | ||
| + | EthernetServer server = EthernetServer(23); | ||
| + | |||
| + | void setup() | ||
| + | { | ||
| + | // initialize the ethernet device | ||
| + | Ethernet.begin(mac, | ||
| + | |||
| + | // start listening for clients | ||
| + | server.begin(); | ||
| + | } | ||
| + | |||
| + | void loop() | ||
| + | { | ||
| + | // if an incoming client connects, there will be bytes available to read: | ||
| + | EthernetClient client = server.available(); | ||
| + | if (client == true) { | ||
| + | // read bytes from the incoming client and write them back | ||
| + | // to any clients connected to the server: | ||
| + | server.write(client.read()); | ||
| + | } | ||
| + | }</ | ||
reference/library/write.txt · 最后更改: 2023/06/07 04:24 由 127.0.0.1
