Thank you Ruud for sharing and sorry for replying late.
You nail it: I was checking Zephyr 2.0.0. I will get the latest copy and give it a try.
Many thanks again,
From: users@... <users@...> on behalf of Ruud Derwig <ruud.derwig@...>
Sent: Monday, August 31, 2020 2:19 AM
To: Justin Huang <justin.y.huang@...>; users@... <users@...>
Subject: Re: [Zephyr-users] Direct ISR support on ARC
What version are you using? ARC support for direct interrupts was added in v2.1
(and note that Z_ARCH_IRQ_DIRECT_CONNECT was renamed to ARCH_IRQ_DIRECT_CONNECT).
From: users@... <users@...>
On Behalf Of Justin Huang
It appears to me that there is no support of 'direct ISR' by Zepher for the ARC processors: I do not see the definition of Z_ARCH_IRQ_DIRECT_CONNECT in the irq.h for ARC.
Could someone please share why it is not supported?