NetXDuo Ethernet on nucleo-h753zi only works with delay

[mo_krauti]

I managed to create a working example ethernet NetXDuo project for the nucleo-h753zi board based of this guide:

https://community.st.com/t5/stm32-mcus/creating-a-dual-ipv6-amp-ipv4-netxduo-udp-application-for/ta-p/570521

See my repository here:

https://github.com/mo-krauti/nucleo-h753zi-ethernet-netxduo

This only works by adding a delay before starting NetXDuo. Why could that be? I also could not find any link mentioning this online? Generally I think setting up the Ethernet Controller on H7 is quite hard compared to the F7 series.

[Andrew Neil]

See: https://community.st.com/t5/stm32-mcus-embedded-software/basic-udp-echo-server-works-in-debug-but-not-run-mode-nucleo/m-p/787083/highlight/true#M61552 ?

Do you also find that it starts OK when running under the debugger?

https://community.st.com/t5/stm32-mcus-embedded-software/processor-stuck-if-i-run-code-without-debugger/m-p/802107#M63384

[Andrew Neil]

Specifically, take a look at the two posts by @Guillaume K in this thread:

https://community.st.com/t5/stm32-mcus-embedded-software/stm32f767-lwip-tcp-client/m-p/778561

@mo_krauti - do they address your issue?

[mo_krauti]

I mean it works now, but this does not explain why the delay is needed and is not documented anywhere.

[Andrew Neil]

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@mo_krauti wrote:

but this does not explain why the delay is needed 

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The posts I mentioned suggest some possible reasons - so worth checking out ...