Problem with w5100 module Drive using Spartan-6

Question

Hi, I have a FPGA (spartan-6) board with a W5100 module that connected to main FPGA board. I want to ping module through CMD. The default ping IP(192.168.1.100) works fine. But when I want to change the default IP to 192.168.1.113 it seems the command doesn’t received correctly in wiznet module. Here is my simulation. what is wrong? SET_IP_Simulation727×145 5.95 KB SET_IP_Simulation.pdf (1.6 KB) change the .pdf in the name of file to .wcfg to see the full simulation in ISIM.(this format is not authorized for uploading)

irina · Answer

Hi, First, I can’t show your pdf file. The file is corrupted and cannot be opened. If you change ip addr from 192.168.1.100 to 192.168.1.113, you write the data('d113) in the register address(0x12) though MOSI. I will be waiting to hear from you. ('d Thanks, Best regards, irina

Eugeny · Answer

javadhabibi: SET_IP_Simulation.PNG727×145 5.95 KB You send 192 to register 0x0F here. Do you change other 4 registers as @irina_kim said?

javadhabibi · Answer

the other 3 bytes are set just like the first. SET_IP_Simulation_countinus_3913×172 6.45 KB If these are important factors: 1- I had connected the module directly to my laptop. 2- Changing IP and the Pinging is my first work with module. I hadn’t change any setting, registers,etc.

javadhabibi · Answer

I am setting my FPGA’s output data on “MOSI” pin. Is it wrong?

Eugeny · Answer

javadhabibi: I am setting my FPGA’s output data on “MOSI” pin. Is it wrong? Why do you think so? I am asking for output of MISO pin of W5100. During write cycle is must output specific values to prove that your write is being accepted by the chip.

javadhabibi · Answer

The MISO is Zero during write operation. is it True?

javadhabibi · Answer

After some correction in board’s connections, the MISO feedback is not reasonable yet. Once it is True and Once Not. what is the probably cause? In the Picture, from top to down are : SCK, MOSI, MISO, SS True MISO: 1_True_a4000×2250 964 KB Power: 4.5 V *SCK Frequency: 500 Khz SCK and MOSI Voltage: 0 - 3.3V

javadhabibi · Answer

False MISO: 2_false_b4000×2250 928 KB

javadhabibi · Answer

I check the active clk number in each period and it is exactly 32. should i check the W5100 to be free (Not busy, For example because of Auto ARP, ICMP, etc)?

javadhabibi · Answer

Problem Solved. The SPI Mode 3 is deleted on Ver. 1.1.8 Mar. 4, 2009. I Used Ver. 1.1.6 and that’s caused the problem. because in Low-period of SS, I have 32 Rising Edge of SCK, but Just 31 falling edge of it. Thanks Eugeny. It is Precisely what you said about active clocks. Here the corrected wave form. True_SS873×77 1.87 KB

javadhabibi · Answer

EXCUSE ME, I am hurried up. the problem not solved! please help me with this amazing problem. I have connected my module to my board with ICSP port(MISO/SCK/RST/+5/MOSI/GND) + a wire for SS(pin 10 of board header). But the MISO feedback is precisely alternate(once true and once not). I am so confussed. Ethernet_shield_lq1412×996 314 KB

javadhabibi · Answer

SPI_Signals1280×960 196 KB

javadhabibi · Answer

Yes the clock is right. After many tries on different probable causes, i found that i should wait at least 10 ms after reset w5100. By changing it, the MISO response is true. Ping and TCP connection is ok. But i have data receive problem that i would post it in a new topic. Thanks for your good support.

Eugeny · Answer

javadhabibi: i found that i should wait at least 10 ms after reset w5100 We assume you read datasheet before making a design. Dataheet says on page 65 that reset to PLOCK is exactly 10 ms. You also must wait until bit 7 of MR will clear to 0 after power up or reset.