Does the UART driver in nRF Connect SDK use DMA

[fgeldenh]

In the nRF5 SDK there are two uart drivers, UART and UARTE. The UARTE driver makes use of the DMA whilts the UART driver uses interupts. This is what I understood when I used the driver in the nRF5 SDK.

In the Zephyr implementation, does the driver use DMA?

I see in the Central Uart sample the configuration specifies 

CONFIG_NRFX_UARTE0=y

From this can I assume that the driver is using the DMA UartE peripheral?

Would CONFIG_NRFX_UART0=y then mean that the interrupt version would be used?

Thank You

[Kenneth]

Hello,

You can make an BOARDNAME.overlay file in your project folder where you have either of these options:

&uart0 {
compatible = "nordic,nrf-uart";
};

OR

&uart0 {
compatible = "nordic,nrf-uarte"; //This is typically default, as seen in the .dts file for your board.
};

Best regards,
Kenneth