Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/f/nordic-q-a/113614/switching-from-uart_interrupt_driven-to-uart_async_api-in-usb-cdc-acm-sample-leads-to-fatal-errorHello, I am working with the USB CDC ACM Sample Application from NCS V2.1.0 on nRF52840DK and have encountered an issue when attempting to replace the UART_INTERRUPT_DRIVEN API with the UART_ASYNC_API . Steps Taken: I took the standard USB CDCen-USTelligent Community 13Wed, 07 Aug 2024 11:01:16 GMTRE: Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/thread/497309?ContentTypeID=1Wed, 07 Aug 2024 11:01:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3fb54051-c75f-4ea8-8d66-4af7078811d6Hieu<p>No problem. Sorry we couldn&#39;t achieve what you wanted to do. Please feel free to close this case at your convenience.</p><div style="clear:both;"></div>RE: Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/thread/497306?ContentTypeID=1Wed, 07 Aug 2024 10:30:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6dfce092-c3cb-4e3e-9341-a7b1e49b2c09Omar<p>Okay thank you</p><div style="clear:both;"></div>RE: Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/thread/497153?ContentTypeID=1Tue, 06 Aug 2024 12:29:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c0411339-5dec-420c-a835-8e3aad9e0293Hieu<p>I don&#39;t think anything is different in NCS v2.1.0. In that DevZone discussion, at least one of the NCS versions used was v2.4.2, stated in the opening post.</p><div style="clear:both;"></div>RE: Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/thread/497059?ContentTypeID=1Tue, 06 Aug 2024 00:08:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:abf4f242-4359-4e56-a604-d50289e1f53fOmar<p>So the conclusion &quot;<span>CDC ACM does not support the Async API in zephyr</span>&quot;<br /><span>However, I&rsquo;m wonderingif this issue has been addressed in newer versions. As I mentioned, I&#39;m currently using NCS V2.1.0 == Zephyr V3.1.99<br /><br /></span>Thank you</p><div style="clear:both;"></div>RE: Switching from UART_INTERRUPT_DRIVEN to UART_ASYNC_API in USB CDC ACM Sample Leads to Fatal Errorhttps://devzone.nordicsemi.com/thread/497044?ContentTypeID=1Mon, 05 Aug 2024 18:36:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:be49f8c2-4a9b-450b-a275-77a5dc60547eHieu<p>Hi Omar,</p> <p>Please refer to the discussion here and let me know if it helps.</p> <p>&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/106129/cannot-get-async-uart0-to-work-with-usb-cdc">Cannot get Async UART0 to work with USB CDC</a>&nbsp;</p> <p>Hieu</p><div style="clear:both;"></div>