RE: nRF52840 uart not available

Hieu — Mon, 12 Aug 2024 19:38:15 GMT

Hi Oetze,

[quote user=""]We were wondering why it wasn't available and how we might enable it anyway. Is it not physically connected? [/quote]

Yes, there is only 4 pins between the DK's Interface MCU and the nRF52840. You can see the details in the DK schematic.
The Interface MCU firmware uses this interface to emulate its VCOM0 port.

[quote user=""]We tried setting the RX/TX lines to P1.01 and P1.02 (arduino_serial according to the board dts file)

We've tested it with the samples/driver/uart code in the zephyr libraries, it worked for uart0 but not uart1.

How can we enable uart1? [/quote]

Seems like you have figured out how to overlay the Devicetree and change pin assignment. UART1 should be enabled by default on the DK Devicetree.

Could you please share more details of what you have done with the Devicetree, and your compiled <build dir>/zephyr/zephyr.dts file?

Hieu