写在前面：
本文章旨在总结备份、方便以后查询，由于是个人总结，如有不对，欢迎指正；另外，内容大部分来自网络、书籍、和各类手册，如若侵权请告知，马上删帖致歉。
本篇就来分析 TCP程序的实现，以及添加自己的接口
/*
* ESPRSSIF MIT License
*
* Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
*
* Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
* it is free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "esp_common.h"
#include "tcp.h"
#include "bsp_tcp.h"
LOCAL struct espconn esp_conn;
LOCAL esp_tcp esptcp;
/******************************************************************************
* FunctionName : tcp_server_sent_cb
* Description : data sent callback.
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
LOCAL void ICACHE_FLASH_ATTR tcp_sent_cb(void *arg)
{
//data sent successfully
os_printf(">>>>> tcp sent succeed !!! \r\n");
user_TCP_Send();
}
/******************************************************************************
* FunctionName : tcp_server_recv_cb
* Description : receive callback.
* Parameters : arg -- Additional argument to pass to the callback function
* pusrdata -- The received data (or NULL when the connection has been closed!)
* length -- The length of received data
* Returns : none
*******************************************************************************/
LOCAL void ICACHE_FLASH_ATTR tcp_recv_cb(void *arg, char *pusrdata, unsigned short length)
{
//received some data from tcp connection
struct espconn *pespconn = arg;
os_printf(">>>>> tcp recv : %s \r\n", pusrdata);
user_TCP_Reveive();
// espconn_send(pespconn, pusrdata, length);
}
/******************************************************************************
* FunctionName : tcp_server_discon_cb
* Description : disconnect callback.
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
LOCAL void ICACHE_FLASH_ATTR tcp_discon_cb(void *arg)
{
//tcp disconnect successfully
os_printf(">>>>> tcp disconnect succeed !!! \r\n");
}
/******************************************************************************
* FunctionName : tcp_server_recon_cb
* Description : reconnect callback, error occured in TCP connection.
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
LOCAL void ICACHE_FLASH_ATTR tcp_recon_cb(void *arg, sint8 err)
{
//error occured , tcp connection broke.
os_printf(">>>>> reconnect callback, error code %d !!! \r\n",err);
user_TCP_Abnormal();
}
/******************************************************************************
* FunctionName : tcp_server_multi_send
* Description : TCP server multi send
* Parameters : none
* Returns : none
*******************************************************************************/
LOCAL void tcp_server_multi_send(void)
{
struct espconn *pesp_conn = &esp_conn;
remot_info *premot = NULL;
uint8 count = 0;
sint8 value = ESPCONN_OK;
if (espconn_get_connection_info(pesp_conn,&premot,0) == ESPCONN_OK){
char *pbuf = "tcp_server_multi_send\n";
for (count = 0; count < pesp_conn->link_cnt; count ++){
pesp_conn->proto.tcp->remote_port = premot[count].remote_port;
pesp_conn->proto.tcp->remote_ip[0] = premot[count].remote_ip[0];
pesp_conn->proto.tcp->remote_ip[1] = premot[count].remote_ip[1];
pesp_conn->proto.tcp->remote_ip[2] = premot[count].remote_ip[2];
pesp_conn->proto.tcp->remote_ip[3] = premot[count].remote_ip[3];
espconn_sent(pesp_conn, pbuf, os_strlen(pbuf));
}
}
}
/******************************************************************************
* FunctionName : tcp_server_listen_cb
* Description : TCP server listened a connection successfully
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
LOCAL void ICACHE_FLASH_ATTR tcp_listen_cb(void *arg)
{
struct espconn *pesp_conn = arg;
os_printf(">>>>> tcp_listen !!! \r\n");
espconn_regist_recvcb(pesp_conn, tcp_recv_cb); // 设置接收回调
espconn_regist_sentcb(pesp_conn, tcp_sent_cb); // 设置发送回调
espconn_regist_disconcb(pesp_conn, tcp_discon_cb); // 设置断开连接回调
// tcp_server_multi_send();// 多服务器发送
}
/******************************************************************************
* FunctionName : tcp_init
* Description : parameter initialize as a TCP server/client
* Parameters : mode -- server/client, remote_ip -- remote ip addr, port -- server/client port
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_tcp_init(TCP_MODE_TYPE mode, struct ip_addr *remote_ip, uint32 port)
{
struct ip_info info;
esp_conn.proto.tcp = (esp_tcp *) os_zalloc(sizeof(esp_tcp)); // 分配空间
esp_conn.type = ESPCONN_TCP; // 创建TCP
esp_conn.state = ESPCONN_NONE; // 一开始的状态,空闲状态
esp_conn.proto.tcp = &esptcp; // 设置TCP的IP和回调函数存储用
esp_conn.proto.tcp->local_port = port; // 监听的端口号
/* 读取 station IP信息 */
wifi_get_ip_info(STATION_IF,&info);
esp_conn.proto.tcp->local_ip[0] = info.ip.addr;
esp_conn.proto.tcp->local_ip[1] = info.ip.addr >> 8;
esp_conn.proto.tcp->local_ip[2] = info.ip.addr >> 16;
esp_conn.proto.tcp->local_ip[3] = info.ip.addr >> 24;
os_printf("\n>>>>> TCP Local IP: %d.%d.%d.%d\n\n", esp_conn.proto.tcp->local_ip[0], \
esp_conn.proto.tcp->local_ip[1], esp_conn.proto.tcp->local_ip[2], \
esp_conn.proto.tcp->local_ip[3]);
if(ESPCONN_TCP_CLIENT == mode){
memcpy(esp_conn.proto.tcp->remote_ip, remote_ip, 4);
esp_conn.proto.tcp->remote_port = port; // 远程的端口号
esp_conn.proto.tcp->local_port += 1; // 监听的端口号
}
espconn_regist_connectcb(&esp_conn, tcp_listen_cb); // 注册 TCP 连接成功建立后的回调函数
espconn_regist_reconcb(&esp_conn, tcp_recon_cb); // 注册 TCP 连接发生异常断开时的回调函数，可以在回调函数中进行重连
if(ESPCONN_TCP_SERVER == mode){
espconn_regist_time(&esp_conn, 180, 0); // 设置超时断开时间 单位：秒，最大值：7200 秒
espconn_accept(&esp_conn); // 创建 TCP server，建立侦听
os_printf("\n>>>>> tcp server setup successful\n");
}else if(ESPCONN_TCP_CLIENT == mode){
espconn_connect(&esp_conn); // 创建 TCP client，启用连接
os_printf("\n>>>>> tcp client setup successful\n");
}
}
以上代码是基于官方社区提供的代码进行简单的分析和修改的，好了，为方便自己管理代码，我们编写自己的接口代码，上面的 user_xxxx()函数就是我们自己引出的函数
/*
* bsp_tcp.c
*
* Created on: 2019年9月4日
* Author: liziyuan
*/
#include "esp_common.h"
#include "bsp_tcp.h"
/******************************************************************************
* FunctionName : user_TCP_Abnormal
* Description : tcp异常回调用户处理
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_TCP_Abnormal(void)
{
}
/******************************************************************************
* FunctionName : user_TCP_Send
* Description : tcp发送回调用户处理
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_TCP_Send(void)
{
}
/******************************************************************************
* FunctionName : user_TCP_Reveive
* Description : tcp接收回调用户处理
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_TCP_Reveive(void)
{
}
/******************************************************************************
* FunctionName : user_TCP_Client_Init
* Description : tcp client初始化
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_TCP_Client_Init(void)
{
const uint8 remote_ip[4] = {192, 168, 1, 1};
user_tcp_init(ESPCONN_TCP_CLIENT, (struct ip_addr *)remote_ip, USER_TCP_CLIENT_PORT);
}
/******************************************************************************
* FunctionName : user_TCP_Server_Init
* Description : tcp server初始化
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR user_TCP_Server_Init(void)
{
user_tcp_init(ESPCONN_TCP_SERVER, (struct ip_addr *)NULL, USER_TCP_SERVER_PORT);
}
/******************************************************************************
* FunctionName : tcp_communication_task
* Description : tcp通讯任务
* Parameters : pvParameters
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR tcp_communication_task(void *pvParameters)
{
os_printf("\n>>>>> TCP communication is being created.....\n");
while(1)
{
if (wifi_station_get_connect_status() == STATION_GOT_IP) // 等待连接到 AP
{
break;
}
vTaskDelay(300 / portTICK_RATE_MS);
}
#if 1
user_TCP_Server_Init();
#else
user_TCP_Client_Init();
#endif
vTaskDelete(NULL);
}
/*------------------------------- END OF FILE -------------------------------*/
至此，简单的 tcp代码分析就结束了，附上社区上面的 TCP参考代码吧
