Interfacing ENC28J60 with NRF52840

[Giri]

Hi,

I am experimenting with ENC28J60 and PCA10056. Following are my connections:

=================    ===================================
NRF52840 PCA10056    ENC28J60 (pin numbers on the board)
=================    ===================================
P0_19                              SCK
P0_21                              SO
P0_20                              SI
P0_03                              CS
P0_04                              INT
VDD                                 VCC
GND                                GND
=================    ===================================

I have flashed zephyr os to PCA10056. I have made necessary configurations and running dhcp client application. I am able to see the IP address being assigned to my device. I have tried pinging the assigned IP address. But I am not getting any response from my device. Also, when I have tried to ping other local IP address from my device, it is throwing a message which says, ping TimeOut. Please help me to resolve this issue. Please reply in case of any clarifications needed.

Thanks in advance,

Giri Prasad N.

[haakonsh]

You need to isolate the issue. Is it it a HW issue, wrong configuration of the Ethernet module, or is the Ethernet driver running on the nRF not behaving as you'd expect. 

Do you have any debug logs, SPI sniffer traces, etc? 

[Giri]

I had screenshot of wireshark log. Following are the sequence of events that you can observe in wireshark:

* IP Address of my device is 10.128.8.16 and IP Address of the PC from which I am initiating ping is 10.128.8.103.

* Wireshark is running on PC with IP address 10.128.8.103.

* From the attached image we can observe that PC has sent ping request to my device.

* After that, device has sent a broadcast message seeking for the owner of IP Address 10.128.8.103(PC).

* Then, PC has responded with its MAC ID.

                 These are the sequence of events that are occurring. I hope this log helps you in understanding the situation. Please let me know if you need more information.

Thanks & Regards,

Giri Prasad N.

[haakonsh]

Do you have any logs from the modem or the nRF device? 

This ethernet sniffer trace only tells us that you got no reply to your ping. 

[Giri]

Yeah, I have enabled debug logs in Zephyr and captured logs from terminal application. Please find attached log file and let me know whether it helps or not. Also let me know in case you need more information.

Thanks & Regards,

Giri Prasad N.

.dhcpv4client_debuglog.txt

[haakonsh]

Well does the problem exist in the nRF device or the modem?

[Giri]

I assume problem exists in the configuration of Zephyr. I might be missing to enable some parts of TCP stack. But I am unable to track it down.

[haakonsh]

I'm afraid Ethernet is a bit outside our area of expertise, maybe someone else on this forum can help you, or you've got to the Zephyr project for help. I know they've got a mailing list and a Slack or Discord channel.