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reference:library:write

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reference:library:write [2017/04/07 10:03] (当前版本)
行 1: 行 1:
 +====== 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,​ len)
 +
 +=== 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 <​SPI.h>​
 +#include <​Ethernet.h>​
 +
 +// network configuration. ​ gateway and subnet are optional.
 +
 + // 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'​s gateway address:
 +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,​ ip, gateway, subnet);
 +
 +  // 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());​
 +  }
 +}</​code>​
reference/library/write.txt · 最后更改: 2017/04/07 10:03 (外部编辑)