Wiznet W5100 with STNRG388A

Question

Hi, I’m trying to integrate W5100 with STNRG388A (stm8s core) using SC18IS602B bridge module as STNRG388A has no SPI interface. So far i have tested the W5100 (Arduino Ethernet Shield) with Arduino Uno, it’s working fine and getting the IP address. Secondly i have tested the SC18IS602B functioning correctly by sending/receiving data to Arduino(SPI Slave). Now I’m trying to integrate the ioLibrary of Wiznet for W5100. I’m unable to get the W5100 getting IP or creating any TCP socket. I want to check, if W5100 is receiving my SPI commands properly or not, how can i get the minimal response by sending commands on SPI using SC18IS602B? Any help in this regard would be appreciated. Thanks in Advance. Sohaib

becky · Answer

I recommend reading and writing RCR and RTR registers. The initial values of the registers are 0x07d0 and 0x08 respectively, and are registers that can be written.

sohaib86 · Answer

WhatsApp Image 2020-04-09 at 2.09.09 PM1280×720 88.3 KB

irina · Answer

This figure is SIPR3 register read operation, is it right? Yon must be set up yourself the Source IP address . Wiznet Chips don’ t save the network information. Network information mean subnet mask, ip address, gateway … also, If CSn is keep low state, the delay doesn’t matter.

sohaib86 · Answer

Thanks for the reply, i have changed the SPI instructions sequence. Now the four bytes are going at once with CS low for four bytes of time. Actually the problem was SC18IS602B’s MOSI pin, it was not driving the Wiznet MOSI pin due to low current capability. Now i have added 1K Pull-up resistor on MOSI line and i can see the response from Wiznet 5100 and got the IP using DHCP. Thanks for the responses.

irina · Answer

Hi~~ I’m glad you solved it well. I’ll definitely remember about Pull-up. Thanks~