w5500创建不了SOCKET

发布于 2023-03-20 16:46:44 浏览：690 订阅该版

3 个回答

宇宙码蚁 2023-03-20

接口与实现分离

XIAO ER 2023-03-21

这家伙很懒，什么也没写！

宇宙码蚁 2023-03-21

接口与实现分离

XIAO ER 2023-03-21

这家伙很懒，什么也没写！

XIAO ER 2023-03-21

这家伙很懒，什么也没写！

宇宙码蚁 2023-03-21

接口与实现分离

XIAO ER 2023-03-21

这家伙很懒，什么也没写！

XIAO ER 2023-03-21

这家伙很懒，什么也没写！

宇宙码蚁 2023-03-21

接口与实现分离

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追加回复

Tamap 2023-03-21

这家伙不懒，签名都写了

端口未关闭，需要检查SR寄存器的状态，然后再根据当前状态执行相应操作，不知道你是客户端还是服务器，但是原理是一样的。这里贴一下官方例程：

```c

int32_t loopback_tcps(uint8_t sn, uint8_t* buf, uint16_t port)
{
   int32_t ret;
   uint16_t size = 0, sentsize=0;

#ifdef _LOOPBACK_DEBUG_
   uint8_t destip[4];
   uint16_t destport;
#endif

switch(getSn_SR(sn))
   {
      case SOCK_ESTABLISHED :
         if(getSn_IR(sn) & Sn_IR_CON)
         {
#ifdef _LOOPBACK_DEBUG_
			getSn_DIPR(sn, destip);
			destport = getSn_DPORT(sn);

printf("%d:Connected - %d.%d.%d.%d : %d\r\n",sn, destip[0], destip[1], destip[2], destip[3], destport);
#endif
			setSn_IR(sn,Sn_IR_CON);
         }
		 if((size = getSn_RX_RSR(sn)) > 0) // Don't need to check SOCKERR_BUSY because it doesn't not occur.
         {
			if(size > DATA_BUF_SIZE) size = DATA_BUF_SIZE;
			ret = recv(sn, buf, size);

if(ret <= 0) return ret;      // check SOCKERR_BUSY & SOCKERR_XXX. For showing the occurrence of SOCKERR_BUSY.
			size = (uint16_t) ret;
			sentsize = 0;

while(size != sentsize)
			{
				ret = send(sn, buf+sentsize, size-sentsize);
				if(ret < 0)
				{
					close(sn);
					return ret;
				}
				sentsize += ret; // Don't care SOCKERR_BUSY, because it is zero.
			}
         }
         break;
      case SOCK_CLOSE_WAIT :
#ifdef _LOOPBACK_DEBUG_
         //printf("%d:CloseWait\r\n",sn);
#endif
         if((ret = disconnect(sn)) != SOCK_OK) return ret;
#ifdef _LOOPBACK_DEBUG_
         printf("%d:Socket Closed\r\n", sn);
#endif
         break;
      case SOCK_INIT :
#ifdef _LOOPBACK_DEBUG_
    	 printf("%d:Listen, TCP server loopback, port [%d]\r\n", sn, port);
#endif
         if( (ret = listen(sn)) != SOCK_OK) return ret;
         break;
      case SOCK_CLOSED:
#ifdef _LOOPBACK_DEBUG_
         //printf("%d:TCP server loopback start\r\n",sn);
#endif
         if((ret = socket(sn, Sn_MR_TCP, port, 0x00)) != sn) return ret;
#ifdef _LOOPBACK_DEBUG_
         //printf("%d:Socket opened\r\n",sn);
#endif
         break;
      default:
         break;
   }
   return 1;
}

```