SDK • stdin blocks USB IRQ5 ?

Hello all,

I've written an interrupt-driven USB stack for CDC/Serial connections.

Everything is predicated on USB buffer completion interrupts on IRQ5.

It's working well for printf and getchar_timeout_us functions.

However, any attempt to use scanf or getc appears to result in a deadlock with no IRQ5 activity to trigger them.

There's a reference in the new SDK which I thought would help, but no luck with that.

Anyone have any ideas where I can look next please as I simply can't determine where or how my IRQ5s are being blocked.

regards,

SC.

Statistics: Posted by serialcomms — Mon Aug 19, 2024 7:10 pm — Replies 0 — Views 24

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