RE: nRF52840 dongle COM Port Writer

Theodorul — Fri, 27 Oct 2023 16:27:28 GMT

Hello, thank you for your answer, but I went with a more rudimentary solution: I included the libraries which you also included and I then simply filled the uart fifo with the data which I needed to transmit.

RE: nRF52840 dongle COM Port Writer

Hung Bui — Fri, 27 Oct 2023 11:31:07 GMT

Hi Theodor,
Have you tested with the \zephyr\samples\subsys\usb\cdc_acm sample ?
The sample use CDC ACM in UART interrupt driven mode. So if you want to send something you need to call the uart_fifo_fill() in an interrupt handler.
The attached modification will print "test" every 2 seconds after the USB CDC port is opened.

devzone.nordicsemi.com/.../4127430.main.c

Check how the timer is added and uart_fifo_fill is called inside my_expiry_function()
It's strongly suggested that you start your development with a nRF52840 Dev Kit, not the Dongle as the dongle is not for development.