W5500, SPI ok, Sn_SR always 0x00, TCP

Question

hello, I have completely activate the SPI communication. I can read and write data to W5500 chip. I checked from scope and from keil. I am going to use this chip for tcp communication. My master is a Freescale KL25 MCU and w5500 is my slave. I have found the tcp guide for w5500. For now I am just using socket 0. I have written the gateway, source IP and read them. They are ok.I can read them. then for tcp: 1- I adjusted the mode register for TCP usage.( 0x01) (I read this value correctly) 2-I adjusted port adress as 31000 (I read this value correctly) 3- Command register, SN_CR= 0x01 (Open the port) the problem starts here. I should read 0x13(SOCK_INIT) from the status register. However I cannot read that value. Then I will have w5500 to go listen mode. Could you please help me what should I do. Is there anything I should do write or check ? Thank you

hjjeon0608 · Answer

Did you wait command register is cleared?? Plz, check this out.

aomgemalmaz · Answer

[quote=“hjjeon0608”]Did you wait command register is cleared?? Plz, check this out.[/quote] I have seen that the Sn_CR is cleared after Open command. However still I can not see SOCK_INIT status.

aomgemalmaz · Answer

[quote=“midnightcow”]Hi, You will check the control byte of SPI frame. I think that the control byte maybe wrong and you did accesse the other device as memory, instead of W5500. As you mentioned before, If the socket registers as Sn_MR, Sn_SPORT is normally write & read, OPEN command in Sn_CR regsiter will change the Sn_CR from SOCK_CLOSED to SOCK_INIT. Plz, Verify block selected bits in the control byte. Thank you.[/quote] I have already checked these BSBs. I think there is no problem of SPI frame. Because I can read and write. For example RTR(retry time register) has default of “0x07D0” which I can read and write via SPI.

aomgemalmaz · Answer

I have solved the problem. The problem was related with my spi_send function. I arranged again and with the correct addres values. Thanks for all replies.

hjjeon0608 · Answer

I’m glad to hear you solved problem.

mrprice · Answer

Hi, I’m facing the exact same problem. Can you elaborate how did you solve it? what was the problem with the send function? thanks Price

Alka Yadav · Answer

hi, my Sn_SR register value always set 0x00, its not change its value from 0x00 to 0x22. my code: START: setMR(Sn_MR_UDP); setSn_PORT(0, 11000); setSn_CR(0, Sn_CR_OPEN); if(getSn_SR(0) !=SOCK_UDP) { setSn_CR(0, Sn_CR_CLOSE); goto START; }