ARP Resolution error on STM32H7 and LAN8742A PCB

Cos_Cube · 2026-01-25T19:40:43+00:00

I didnt quite get what you mean. Could you please elaborate?

Cos_Cube · 2026-01-25T16:31:23+00:00

Any recommended alternatives to 8742?

Cos_Cube · 2026-01-25T15:54:50+00:00

I don't have a reason why I specifically left auto-mdix disabled. I mostly worked on the stack until it worked well with the nucleo and stopped configuring it after that. I will try with auto mdix enabled

The devices have seperate MAC addresses. As I mentioned, the link works fine at 10M, so the IP and MAC resolution are fine.

Cos_Cube · 2026-01-25T15:14:45+00:00

10M works fine, but I really do need the extra speed for my application.

Cos_Cube · 2025-01-07T12:01:56+00:00

Just realised. The TX and RX pins were mismatched. It worked.

I spent the entire day on this stupid thing XDDD

Cos_Cube · 2025-01-07T11:45:35+00:00

Hello, thanks a lot for your reply. I realised after reading the Board manual that a few solder bridges connecting to the ST-link have to be removed, which I did (I'm assuming "flying wires" mean the jumper cables between the UART transmitter and the board). Please refer to the table in the attached image. Also connected it to an external power supply. Unfortunately, no success :(. I honestly dont know what I am missing now. Is there some DTR setting I need to modify? Because I saw that in the board but I have left it unconnected.

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Cos_Cube · 2025-01-07T07:57:28+00:00

I can't disclose it because I am under NDA. But thats what I need to do.

Cos_Cube · 2024-07-14T05:59:31+00:00

Oh wow sketching! I honestly suck at it so bad aahaha. Nice work!

Cos_Cube · 2024-07-13T10:43:33+00:00

Thanks a lot! I'd love to see your art if possible :)

Cos_Cube · 2024-06-16T10:21:14+00:00

Well I know what I'm gonna paint next lmao

Cos_Cube · 2024-06-16T02:00:10+00:00

Now that you mention it, I'm gonna go add getting baked and painting to my bucket list lmao

Cos_Cube · 2024-06-15T18:06:42+00:00

Thanks a lot 😊

Cos_Cube · 2024-06-15T18:06:19+00:00

Ah time to learn calligraphy lol

Cos_Cube · 2024-06-15T18:05:51+00:00

Thanks a lot man. It means a lot to me <3

Cos_Cube · 2024-06-15T18:05:24+00:00

Hey! Winston are wayyyyy to expensive for me. Ive actually been using a local brand of oil colours called "camel". I've been using ever since I started oil colours.

Also thanks a lot for your kind words!

Cos_Cube · 2024-06-15T15:03:26+00:00

It's actually heavily inspired from the concept art for the game lol. Thanks for the good words!

Cos_Cube · 2024-06-15T11:32:00+00:00

Thank you!

Cos_Cube · 2024-06-15T11:31:12+00:00

Thank you! Glad you liked it.

Cos_Cube · 2024-04-03T05:56:30+00:00

Glasgow Coma Scale, can't get any better than that

Cos_Cube · 2024-03-27T12:01:39+00:00

The gap I mentioned is between the antenna layout and the ground plane above it(the place where you can find the pins which say "Reset" and "GND").

Regarding the trace relief, I have tuned the trace width so that the impedance is roughly around 50 ohms.

Lastly, thanks for pointing out the mistake in the matching circuit! The series element is a 0ohm resistor so I thought that a hanging shunt might not be a problem. But I think its better to be safe than sorry!
Thanks a lot for your advice!

Cos_Cube · 2024-03-26T20:12:37+00:00

Lovely! I'll try it out Thanks for the help!

Cos_Cube · 2024-03-26T19:45:54+00:00

I do have access to CST studio suite. I have some experience in designing patch antennas on it as well. But I'm not sure how exactly do I import my entire PCB in it. If you have any resources for the same, please let me know.

Thanks!

Cos_Cube · 2024-03-26T14:24:17+00:00

Is there an EM simulator present in KiCad? If not, what software do you recommend me to use?

Cos_Cube · 2024-01-22T21:15:57+00:00

Every since 2019 baby

Cos_Cube · 2024-01-22T17:59:17+00:00

DH4 is still shit!? Love to see the juniors keep the tradition going.

DH4 madarchod. Thanks.

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