UART stops working when interrupts are enabled

Hi

I have managed to run the example design on a DE0-Nano board and managed to run the UART in interrupt mode with the example design int he link below:

The HAL API was used in the example design.

Tried using the method you shared of using the C Library method of (fOpen and fWrite), I have see the same behavior like you mentioned.

The UART could not write when I enable the interrupt when I am using the C library when interfacing the UART.

After looking around, it seems like the C library method of fWrite and fRead do not support interrupt mode of reading and writing . So I would say it is an expected behavior when we enable the interrupt when using the C library method.

If you are looking at using the UART with interrupt mode, I woud suggest you to use the HAL API to interface with the UART.

Regards

Jingyang, Teh