PLC做客户端STM32+W5500做服务端，PLC通过modbusTCP和单片机通讯，单块板子通讯的时候SOCK没有问题

年糕 · 发表于 2021-9-10 10:49:41

本帖最后由年糕于 2021-9-10 10:51 编辑

PLC做客户端STM32+W5500做服务端，PLC通过modbusTCP和单片机通讯，PLC和单块板子通讯的时候SOCK没有问题，发送接收也都正常，我这里是先单块板子和PLC单独通讯，这里有四块板子，每一块都是STM32+W5500，但是PLC在和四块板子轮询通讯的时候，SOCK就连接不上了。我查了很多资料，我个人感觉是PLC在轮询的时候，假设和第一块板子连接，正常通讯后，在轮询到第二块板子，但是第一块板子的SOCK并没有完全断开，导致SOCK的通道被占用。。。第二块板子就连接不上，第三块第四块也是同样的问题。我的每块板子IP都不一样，IP地址的最后一位用作MAC地址的最后一位，这样每块板子的MAC地址也就不一样了。。。。请问各位大佬，老哥，有没有做过类似的实验或者项目。怎样让PLC在轮询的时候吧上一块板子的通讯完全断开后，然后再去连接另一块板子。主函数里面：
int main(void)
{
SystemInit();
I2C_EE_Init();
read_from_24c02();
Watmp_LED_INIT(); /*LED init*/
Waterflow_Sw_Init();
ADC_Init_Config();
DAC_Config_Init();
w5500_init();
socket_buf_init(txsize, rxsize) ;// 3õê¼»ˉ8¸öSocketμÄ·￠Ëí½óêÕ»o′æ′óD¡
DAC_SetChannel2Data(DAC_Align_12b_R,500);
DAC_SetChannel1Data(DAC_Align_12b_R,500);

while(1)
{
      ADC_Calculate();
do_tcp_top();
}
}

void do_tcp_top()
{
u8 status = 0;
u16 len = 0;
if(RestFlag==2)
{
      RestFlag = 0;
      close(0);
      close(1);
      mac[5] = local_ip[3];

      wiz_write_buf(SHAR0, mac, 6);                                        /*½«IPÅäÖÃDÅÏ￠D′èëW5500Ïàó|¼Ä′æÆ÷*/
      wiz_write_buf(SUBR0, subnet, 4);
      wiz_write_buf(GAR0,  gateway, 4);
      wiz_write_buf(SIPR0, local_ip, 4);
}

status = IINCHIP_READ(Sn_SR(0));

switch(status)
{
case SOCK_CLOSED:
         socket(0,Sn_MR_TCP,local_port,Sn_MR_ND);
         break;

case SOCK_INIT:
         listen(0);
         break;

case SOCK_ESTABLISHED:          /*socket′|óúá¬½ó½¨á￠×′ì¬*/
         if(IINCHIP_READ(Sn_IR(0)) & Sn_IR_CON)
         {
            IINCHIP_WRITE(Sn_IR(0), Sn_IR_CON);          /*Çå3y½óêÕÖD¶Ï±êÖ¾Î»*/
         }
         len=getSn_RX_RSR(0);                                           /*¶¨òålenÎaòÑ½óêÕêy¾YμÄ3¤¶è*/
         if(len>0)
         {
            recv(0,RJ45_Rx_buff,len);          /*½óêÕà′×ÔServerμÄêy¾Y*/
            recvfrom(0,RJ45_Rx_buff, len, remote_ip2,&remote_port2);       /*W5500½óêÕ¼ÆËã»ú·￠Ëíà′μÄêy¾Y*/
            Watp_remote_RJ45_reseive();
         }
         break;

case SOCK_CLOSE_WAIT:
   close(0);
      break;

}
}

IP 端口 MAC地址
uint8 mac[6]={0x00,0x08,0xdc,0x11,0x11,0x66};
uint8 mac2[6]={0x00,0x08,0xdc,0x11,0x11,0x25};
/* ¶¨òå±¾»úIP1DÅÏ￠*/
uint8 local_ip[4] ={192,168,0,102};    /*¶¨òåéè±¸½ó¿úW5500Ä¬èÏIPμØÖ·*/
uint8 subnet[4]={255,255,255,0};    /*¶¨òåW5500Ä¬èÏ×óíøÑúÂë*/
uint8 gateway[4]={192,168,0,1};       /*¶¨òåW5500Ä¬èÏíø1Ø*/
uint16 local_port=502;                            /*¶¨òå±¾μØ¶Ë¿ú*/

uint8  remote_ip[4]={255,255,255,255};          /*Ô¶¶ËIPμØÖ·*/
uint16 remote_port=502;            /*Ô¶¶Ë¶Ë¿úoÅ*/

/* ¶¨òåIP2óëéÏÎ»»úí¨DÅDÅÏ￠ */
uint8 local_ip2[4] ={192,168,0,102};       /*¶¨òåéÏÎ»»úW5500Ä¬èÏIPμØÖ·*/
uint8 subnet2[4] ={255,255,255,0}; /*¶¨òåW5500Ä¬èÏ×óíøÑúÂë*/
uint8 gateway2[4]  ={192,168,0,1}; /*¶¨òåW5500Ä¬èÏíø1Ø*/
uint16 local_port2 = 502;                            /*¶¨òå±¾μØ¶Ë¿ú*/

uint8  remote_ip2[4]={192,168,0,3};          /*éÏÎ»»úμÄIP*/
uint16 remote_port2=502;            /*Ô¶¶Ë¶Ë¿úoÅ*/

年糕 · 发表于 2021-9-10 10:50:04

int main(void) { SystemInit(); I2C_EE_Init(); read_from_24c02(); Watmp_LED_INIT(); /*LED init*/ Waterflow_Sw_Init(); ADC_Init_Config(); DAC_Config_Init(); w5500_init(); socket_buf_init(txsize, rxsize) ;// 3õê¼»ˉ8¸öSocketμÄ·￠Ëí½óêÕ»o′æ′óD¡ DAC_SetChannel2Data(DAC_Align_12b_R,500); DAC_SetChannel1Data(DAC_Align_12b_R,500); while(1) { ADC_Calculate(); do_tcp_top(); } } void do_tcp_top() { u8 status = 0; u16 len = 0; if(RestFlag==2) { RestFlag = 0; close(0); close(1); mac[5] = local_ip[3]; wiz_write_buf(SHAR0, mac, 6); /*½«IPÅäÖÃDÅÏ￠D′èëW5500Ïàó|¼Ä′æÆ÷*/ wiz_write_buf(SUBR0, subnet, 4); wiz_write_buf(GAR0, gateway, 4); wiz_write_buf(SIPR0, local_ip, 4); } status = IINCHIP_READ(Sn_SR(0)); switch(status) { case SOCK_CLOSED: socket(0,Sn_MR_TCP,local_port,Sn_MR_ND); break; case SOCK_INIT: listen(0); break; case SOCK_ESTABLISHED: /*socket′|óúá¬½ó½¨á￠×′ì¬*/ if(IINCHIP_READ(Sn_IR(0)) & Sn_IR_CON) { IINCHIP_WRITE(Sn_IR(0), Sn_IR_CON); /*Çå3y½óêÕÖD¶Ï±êÖ¾Î»*/ } len=getSn_RX_RSR(0); /*¶¨òålenÎaòÑ½óêÕêy¾YμÄ3¤¶è*/ if(len>0) { recv(0,RJ45_Rx_buff,len); /*½óêÕà′×ÔServerμÄêy¾Y*/ recvfrom(0,RJ45_Rx_buff, len, remote_ip2,&remote_port2); /*W5500½óêÕ¼ÆËã»ú·￠Ëíà′μÄêy¾Y*/ Watp_remote_RJ45_reseive(); } break; case SOCK_CLOSE_WAIT: close(0); break; } }