Hello,
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 CDC ACM Sample Application from the NCS V2.1.0 samples.
- I modified the code to switch from using
UART_INTERRUPT_DRIVEN
toUART_ASYNC_API.
Problem:
After making the changes and using the uart_tx()
function, I encountered a fatal error. Below are the details:
Here are the screenshots showing the code differences and the specific error messages encountered:
PS: i defined uart_cb() above, and i just put a switch case and some comments, and for the tx_buf[] i initialized it with some text.
And here are the prj.conf changes
Error Message:
I would appreciate any insights or guidance on why switching to UART_ASYNC_API
is causing this issue and how to resolve it. Specifically, I am looking for:
- Correct procedure to transition from
UART_INTERRUPT_DRIVEN
toUART_ASYNC_API
for the USB CDC ACM application. - Any known issues or considerations when using
UART_ASYNC_API
in this context.
Thank you for your assistance!