W5500 TCP Server is refusing to connect

Question

Hi, I have made the socket 0 to listen. But while reading the register Sn_SR , value is toggling sometimes and at client i am getting the error “Connection Refused”. Here is part of my code: socket_write(0x04, 0x13); socket_write(0x05, 0x88); socket_write(0x00, 0x01); socket_write(0x01, 0x01); socket_write(0x01, 0x02); while(1){ Delay_ms(1000); val = socket_read(0x03); UART1_Write(val); }

Eugeny · Answer

Insufficient information. What your socket_write calls are expected to do? Which values socket_read gives?

irina · Answer

Hi dhanunjay, dhanunjay: I have made the socket 0 to listen. But while reading the register Sn_SR , value is toggling sometimes and at client i am getting the error “Connection Refused”. When implementing a TCP server device based on the W5500 chip, please refer to the loopback_tcps() function of the next github link as a skeleton. github.com Wiznet/ioLibrary_Driver/blob/master/Application/loopback/loopback.c #include <stdio.h> #include "loopback.h" #include "socket.h" #include "wizchip_conf.h" #if LOOPBACK_MODE == LOOPBACK_MAIN_NOBLCOK 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 : This file has been truncated. show original There is a caution. Please do not use delay() function when implementing networking applications. Network application devices (especially for a TCP server) must be able to receive client connection requests at any time. These delay routines in while loop can cause client connection failure and timeout.

dhanunjay · Answer

1366×768 91.4 KB Here is the packet capture from the wireshark 192.168.0.150 is my w5500 TCP Server ip and other my pc. Here my total code #include "Wizchip_Conf.h" #include "W5500.h" #include "Socket.h" #define SOCK_ID_TCP 0 #define SOCK_ID_UDP 1 #define SOCK_WEBSERVER 0 #define PORT_TCP 5000 #define PORT_UDP 10001 #define PORT_WEBSERVER 80 #define DATA_BUF_SIZE 100 #define _W5500_SPI_VDM_OP_ 0x00 #define _W5500_SPI_FDM_OP_LEN1_ 0x01 #define _W5500_SPI_FDM_OP_LEN2_ 0x02 #define _W5500_SPI_FDM_OP_LEN4_ 0x03 uint8_t gDATABUF[DATA_BUF_SIZE]; sbit Wizchip_Rst at LATE1_bit; sbit Wizchip_CS at LATE0_bit; sbit Wizchip_Rst_Direction at TRISE1_bit; sbit Wizchip_CS_Direction at TRISE0_bit; int32_t ret; uint16_t size = 100, sentsize=0, i=10000; volatile wiz_NetInfo gWIZNETINFO = { {0x00, 0x14, 0xA3, 0x72, 0x17, 0x3f}, // Source Mac Address {192, 168, 0, 150 }, // Source IP Address {255, 255, 255, 0}, // Subnet Mask {192, 168, 0, 1}, // Gateway IP Address {8, 8, 8, 8}, // DNS server IP Address NETINFO_STATIC }; volatile wiz_PhyConf phyConf = { PHY_CONFBY_HW, // PHY_CONFBY_SW PHY_MODE_MANUAL, // PHY_MODE_AUTONEGO PHY_SPEED_10, // PHY_SPEED_100 PHY_DUPLEX_FULL, // PHY_DUPLEX_HALF }; volatile wiz_NetInfo pnetinfo; void CB_ChipSelect(void) { Wizchip_CS = 0; } // brief Call back function for WIZCHIP deselect. void CB_ChipDeselect(void) { Wizchip_CS = 1; } // brief Callback function to read byte usig SPI. uint8_t CB_SpiRead(void) { return SPI1_Read(0); } // brief Callback function to write byte usig SPI. void CB_SpiWrite(uint8_t wb) { SPI1_Write(wb); } uint8_t val; uint8_t mac[] = {0x00, 0x08, 0xDC, 0xAB, 0xCD, 0xEF}; uint8_t gw[] = {0xC0, 0xA8, 0x00, 0x01}; uint8_t sn[] = {0xFF, 0xFF, 0xFF, 0x00}; uint8_t sip[] = {0xC0, 0xA8, 0x00, 0x96}; uint8_t buffsize[8] = { 2, 2, 2, 2, 2, 2, 2, 2 } ; void socket_write(uint8_t reg_off, uint8_t val){ CB_ChipSelect(); SPI1_Write(0x00); SPI1_Write(reg_off); SPI1_Write(0x0E); SPI1_Write(val); CB_ChipDeselect(); } uint8_t socket_read(uint8_t…