TCP Example

Question

Hello I would like get example c project for W5500io TCP Server, because I have no idea how wrote program for my W5500io. I write my Pseudocode example: Init function: Sn_Mr set on TCP Sn_Port0 set on 80 Sn_CR set OPEN Listen function: Sn_CR set Listen Established test function: if(Sn_SR == Established) OK and now, I don’t know, how I receive data?

Coccoliso · Answer

You gave a look here : [url]https://github.com/Wiznet/W5500_EVB[/url] There are two examples one for DHCP and the other for DNS that contain most of the C ++ functions that you need. Still lack a bit before your macro instructions you must… set the MAC address set an IP address for your device set the gateway addr set subnet mask …or implement DHCP Then after you’ve written in your post make a loop on ever opened socket and verify when that pass to established. So staying in the area of macro language … While true for sockreg as byte = 0 to (MAX_SOCK_NUM - 1) sockstat as byte = ReadSocketReg(sockreg, Sn_SR) Select sockstat Case SOCK_CLOSED If Socket(sockreg, Sn_MR_TCP, TCP_PORT, 0) Then // Reenter a closed socket in listen mode If Not Listen(sockreg) Then DelayForAWhile() End If End If Case SOCK_ESTABLISHED rsize as UShort = ReadSocketword(sockreg,Sn_RX_RSR0) // Get Recv Size If rsize > 0 Then rxpointer as UShort = ReadSocketword( sockreg, Sn_RX_RD0 ) // First byte RX Buffer location /* incoming stream is here at rxpointer WIZCHIP_READ_BUF and other memory access function : https://github.com/Wiznet/W5500_EVB/blob/master/ioLibrary/Ethernet/W5500/w5500.c https://github.com/Wiznet/W5500_EVB/blob/master/ioLibrary/Ethernet/W5500/w5500.h Socket related functions: https://github.com/Wiznet/W5500_EVB/blob/master/ioLibrary/Ethernet/socket.c https://github.com/Wiznet/W5500_EVB/blob/master/ioLibrary/Ethernet/socket.h */ rxpointer = rxpointer + 1 WritesocketWord(sockreg, Sn_RX_RD0, rxpointer ) // Increase readed position WriteSocketReg(sockreg, Sn_CR, Sn_CR_RECV) // W5500 move the RX pointer While(ReadSocketReg(sockreg, Sn_CR) <> 0 ) End While End If Case SOCK_FIN_WAIT, SOCK_CLOSING, SOCK_TIME_WAIT, SOCK_CLOSE_WAIT, SOCK_LAST_ACK WriteSocketReg(sockreg, Sn_CR, Sn_CR_CLOSE) // Close this socket While(ReadSocketReg(sockreg, Sn_CR) <> 0) End While End Select Next sockreg End While WIZCHIP_READ_BUF and other memory access functions…

drVrh · Answer

Thank you for your reply, When I try everything you said, I will reply again. But firstly I would like to test the connection with W5500io over SPI, how can I do that? Maybe by sending a question and recieving an answer. I tested W5500io with pinging. I connected the module on the supply and the router, I used pinging and the device responded well. Now I would like to test the SPI communication. How?

Coccoliso · Answer

Hello, I’ve seen that uses Arduino 2 and I not have present at that point this MPU is about W5500 but I’m sure there is a working library for W5100 with Arduino One and then from there you can go to drive SPI. Functions for drive a W5500 throw an SPI module is here [url]https://github.com/Wiznet/W5500_EVB/blob/master/ioLibrary/Ethernet/W5500/w5500.c[/url] and are : WIZCHIP_READ, WIZCHIP_READ_BUF, WIZCHIP_WRITE_BUF, WIZCHIP_READ_BUF In this module you can find function for transfer a buffer like wiz_send_data, wiz_recv_data , function for registers like getSn_TX_FSR and getSn_RX_RSR Get to : know better Arduino 2 SPI library starts from WIZCHIP_READ and WIZCHIP_WRITE and modify them with calls to Arduino 2 SPI library Then you are ready to read and write in W5500 registers ( IP, MAC and gateway registers). It is what I have done to adapt the library to PIC24 family.

drVrh · Answer

I want to develop the application using Atmega328p. Are the libraries the same? Thanks

Coccoliso · Answer

In this I can not help you because I do not know ATMEGA328P and even the development system for Arduino One or Arduino 2. As I told… the operating principle is described in GitHub sources for the W5500 that is the basis. You have to see if there is already a W5500 library for ATMEGA328P or use the standard SPI library of your MPU to write a library from scratch.