W5500 tcp connection problem

Question

hello, I have been working with W5500 for a while for my project . I have succeeded in initializing the chip after a while. Now I am stuck at the TCP connection problem. I am trying to make the W5500 chip as server and make connection . The issue is that i am stuck at the socket_listen State, I did all the things as per data sheet and related forum discussion.i will post my code bellow

Zack1 · Answer

main { spi_data[0] = 0x00; //# spi_data[1] = 0x39; //# spi_data[2] = 0x00; //# spi_data[3] = 0x00; //# GpioDataRegs.GPBCLEAR.bit.GPIO57 = 1; //cs low //# for (i=0;i<4;i++) //# { //# reading version register value (0x04) SpiaRegs.SPITXBUF = (spi_data[i]<<8); //send frame //# } //# //# //rdata =(SpiaRegs.SPIRXBUF>>8); //recieve data //# //# DELAY_US(29); //# GpioDataRegs.GPBSET.bit.GPIO57 = 1; //# version_data = SpiaRegs.SPIDAT; //# DELAY_US(10); // Reading PHYCFGR reg spi_data[0] = 0x00; //# spi_data[1] = 0x2E; //# spi_data[2] = 0x00; //# spi_data[3] = 0x00; //# GpioDataRegs.GPBCLEAR.bit.GPIO57 = 1; //cs low //# for (i=0;i<4;i++) //# { //# Reading PHYCFGR reg SpiaRegs.SPITXBUF = (spi_data[i]<<8); //send frame //# } //# //# //rdata =(SpiaRegs.SPIRXBUF>>8); //recieve data //# //# DELAY_US(29); //# GpioDataRegs.GPBSET.bit.GPIO57 = 1; //# phy_data = SpiaRegs.SPIDAT; //# DELAY_US(10); //# // Writing MR register for internal register initialization spi_data[0] = 0x00; //# spi_data[1] = 0x00; //# spi_data[2] = 0x04; //# spi_data[3] = 0x80; //# GpioDataRegs.GPBCLEAR.bit.GPIO57 = 1; //cs low //# for (i=0;i<4;i++) //# Writing MR register for internal register initialization { //# SpiaRegs.SPITXBUF = (spi_data[i]<<8); //send frame //# } //# //# //rdata =(SpiaRegs.SPIRXBUF>>8); //recieve data //# //# DELAY_US(29); //# GpioDataRegs.GPBSET.bit.GPIO57 = 1; //# DELAY_US(80); // Reading MR register for internal register initialization spi_data[0] = 0x00; //# spi_data[1] = 0x00; //# spi_data[2] = 0x00; //# spi_data[3] = 0x00; //# GpioDataRegs.GPBCLEAR.bit.GPIO57 = 1; //cs low //# for (i=0;i<4;i++) //# Reading MR register for internal register initialization { //# SpiaRegs.SPITXBUF = (spi_data[i]<<8); //send frame //# } //# //# //rdata =(SpiaRegs.SPIRXBUF>>8); //recieve data //# //# DELAY_US(29); //# GpioDataRegs.GPBSET.bit.GPIO57 = 1; //# Mr_status = SpiaRegs.SPIDAT; //# DELAY_US(10); //# //Writing GAR Gar_data[0] = 0x00; //# Gar_data[1] = 0x01; //# Gar_data[2] = 0x04; //#…

Zack1 · Answer

Zack1: } //# //# // rdata =(SpiaRegs.SPIRXBUF>>8); //recieve data //# //# DELAY_US(29); //# GpioDataRegs.GPBSET.bit.GPIO57 = 1; //# int_stat = SpiaRegs.SPIDAT; //# DELAY_US(10); //if () // loop ends } //main ends somebody do help as soon as possible

Zack1 · Answer

@becky Hello. I see you have edited the code in the notification. What change did you make?

Zack1 · Answer

@becky Thanks for the help sir. And sorry for the inconvenience caused , i was able to solve the issue for now, i was able to establish the connection.(Mistake was with an array name) But through herculese only. My code gets stuck at the Listen state, and only after using herculese the conection gets established. I dont know why its doesnot work with the code. Another doubt is regarding the Sn_TXBUF_SIZE , Sn_TX_FSR, Sn_TX_RD ,do these registers belongs to the Socket 0 Register or the Socket 0 TX Buffer. Doubt arised as i was tring to send some 8 byte data am getting so many junk values along with the data

Zack1 · Answer

@becky Sir , It would be a great help if you could help me clear these things for me. For sending data , i believe the steps are like this right, Configure the Size of TX_Buffer Read the Starting Offset address from TX_RD, for writing Tx_data to TX buff Check the data to be written is less than or equal to the free size. Write data to Tx_Buffer Write the Number of bytes of transmitting data to TX_WR.(if i am sending a 8 byte data for the test purpose do i write value 0x0008 to the TX_WR?) Issue Send Command.

Zack1 · Answer

@becky By doing so am able transmit data but am getting so many junk values along with data. and Large number of packets are being send.

Zack1 · Answer

11024×600 226 KB 21024×600 216 KB 31024×600 217 KB 41024×600 208 KB this is the data captured. as you can see i have send " AA AA AA AA AA AA AA" as data for a single time. But am getting data of length 1460 3 times and 1 packet of 629. 4 images are of 4 packets. I wrote the value for TX_WR as 0x07 as am sending 7 bytes. and data writing offset address which i got from TX_RD reg

becky · Answer

Zack1: Thanks for the help sir. And sorry for the inconvenience caused , i was able to solve the issue for now, i was able to establish the connection.(Mistake was with an array name) But through herculese only. My code gets stuck at the Listen state, and only after using herculese the conection gets established. I dont know why its doesnot work with the code. TCP Server waits for Client connection in listen state. After that, when the Client connects, it changes to Establish state. This is normal operation. Zack1: For sending data , i believe the steps are like this right, Configure the Size of TX_Buffer Read the Starting Offset address from TX_RD, for writing Tx_data to TX buff Check the data to be written is less than or equal to the free size. Write data to Tx_Buffer Write the Number of bytes of transmitting data to TX_WR.(if i am sending a 8 byte data for the test purpose do i write value 0x0008 to the TX_WR?) Issue Send Command. 2 → Read the offset address from TX_RD → Sn_TX_WR. 4 → You should calculate Write Offset Address and write data to this address(=addrsel). #define WIZCHIP_TXBUF_BLOCK(N) (2+4*N) //< Socket N Tx buffer address block ptr = getSn_TX_WR(sn); addrsel = ((uint32_t)ptr << 8) + (WIZCHIP_TXBUF_BLOCK(sn) << 3); 5 → Write the value increased by the amount of data to be transmitted of the existing Sn_TX_WR value. If Sn_TW WR value is 0x0070, you should write the 0x0078 to send 8byte data.

Zack1 · Answer

becky: 2 → Read the offset address from TX_RD → Sn_TX_WR. 4 → You should calculate Write Offset Address and write data to this address(=addrsel). Sorry I didn’t get that well. Can you explain it a bit more,? For you information am not using the IO library. Did u mean to Read the Offset address from the TX_RD and write the address as the starting address to the TX_BUFFER register? And I am getting same values from TX_RD and TX_WR, is this normal?

Zack1 · Answer

W5500 data sheet is so incomplete that i have to depend on the forum for simple doubts and that too takes days to get replay

becky · Answer

Sorry. Please refer to ioLibrary Driver. github.com Wiznet/ioLibrary_Driver/blob/master/Ethernet/W5500/w5500.c //***************************************************************************** // //! \file w5500.c //! \brief W5500 HAL Interface. //! \version 1.0.2 //! \date 2013/10/21 //! \par Revision history //! <2015/02/05> Notice //! The version history is not updated after this point. //! Download the latest version directly from GitHub. Please visit the our GitHub repository for ioLibrary. //! >> https://github.com/Wiznet/ioLibrary_Driver //! <2014/05/01> V1.0.2 //! 1. Implicit type casting -> Explicit type casting. Refer to M20140501 //! Fixed the problem on porting into under 32bit MCU //! Issued by Mathias ClauBen, wizwiki forum ID Think01 and bobh //! Thank for your interesting and serious advices. //! <2013/12/20> V1.0.1 //! 1. Remove warning //! 2. WIZCHIP_READ_BUF WIZCHIP_WRITE_BUF in case _WIZCHIP_IO_MODE_SPI_FDM_ //! for loop optimized(removed). refer to M20131220 This file has been truncated. show original

becky · Answer

Zack1: Did u mean to Read the Offset address from the TX_RD and write the address as the starting address to the TX_BUFFER register? You should read the Sn_TX_WR to get offset address. Sn_TX_RD is not. Zack1: And I am getting same values from TX_RD and TX_WR, is this normal? If you increase the value to send data to Sn_TX_WR and set a send command and complete to sending data, Sn_TX_RD is automatically incremented and equal to Sn_TX_WR.

Zack1 · Answer

becky: gSn_TX_BASE What is Sn_TX_BASE, I don’t see there is such a register. i did Read the TX_WR ( i believe this is the offset address ) And to calculate the write start address , i believe this must be added with the TX_BASE you said, right?! And I didnt understand what TX_Base.

Zack1 · Answer

After socket connection got established. I did like this. Read TX_WR register , assume the value be (0x43E8) Write data to the TX_Buffer with adress as (0x43E8) and Control Phase as 0x14, am Writing a 3 byte data Increment the value as 0x43E8 + 0x03 Write the incremented value to TX_WR register. Issue the SEND command. Wait for the command to be executed. Am able to send data , but monitoring through wire shark is give me data along with junk value, insted of 8 byte data am getting like 4 packets of 1460 bytes. Where in the first packet required data is at the staring of data byte , and going to inner on other packets

becky · Answer

Zack1: What is Sn_TX_BASE, I don’t see there is such a register. Sorry this is about w5100s and I’m confused. Zack1: After socket connection got established. I did like this. Read TX_WR register , assume the value be (0x43E8) Write data to the TX_Buffer with adress as (0x43E8) and Control Phase as 0x14, am Writing a 3 byte data Increment the value as 0x43E8 + 0x03 Write the incremented value to TX_WR register. Issue the SEND command. Wait for the command to be executed. This is correct. Thank you.

becky · Answer

I think it’s because you wrote 0x0008 in Sn_TX_WR. The length of data is calculated by the difference between Sn_TX_WR and Sn_TX_RD. So if the Sn_TX_WR(=Sn_TX_RD) value is 0xe937 and you write 0x0008 to Sn_TX_WR, the 0x16d0 bytes of data (1460x4), which is the difference between 0x0008 and 0xe937, be sent.

Zack1 · Answer

ok @becky, i understood you clearly. but as of now am not writing 0x0008, The value being passed to the TX_WR now is actually TX_WR + 0x03 , which is the data length am sending now! And am getting same values for TX_WR and TX_RD

becky · Answer

The process you mentioned above is correct. If you still have symptoms, I do not know why. So please attach your code. I want to check it.

Eugeny · Answer

Zack1: And am getting same values for TX_WR and TX_RD As I know it is normal (I use W5100 though). You read TX_WR, then you increment it by number of bytes you want to send (0x03 in your case), and write the resulting value back to TX_WR. Until SEND command completes, you read original value of TX_WR from the register. Only after SEND command completes, it changes to TX_WR+0x03. I caught this “problem” when trying to accumulate data in the TX buffer by placing chars into TX buffer and increasing value of TX_WR without issuing SEND command. Unfortunately, this does not work as next TX_WR always reads original value if SEND command was not issued.

Zack1 · Answer

@Eugeny @becky Thanks for the help . The issue is solved for now, and am getting the data as required. The problem was with chip select duration. For one of the frame chip select was turning high before the completion of data transmission. i will post my entire code here, as it could help someone in the future. Am not using the IO lib , am communicating with SPI frame as mentioned for W5500. codefinal1.zip (132.6 KB)

susan56 · Answer

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cellkey · Answer

Hi, this calculation is not understood…