Discrepancy/differences in UART baudrate configs in sdk_config.h?

[Harry]

I used SDK v15.2.0 (for older project) and SDK v17.0.0 (newer ones), for 52832 and 52840 (and perhaps in other platforms) I noticed there is discrepancy in UART baudrate config values.

For 115200 bps:

• NRFX_UARTE and NRF_LOG_BACKEND_UART: the value is 30801920
• NRFX_UART and UART_DEFAULT: the value is 30924800

My questions are:

1. Why they're different?
2. Is it possible to use UARTE for DFU serial?

[Jared]

Hi,

1. It's different because the UARTE and UART are two different peripherals that require two different values to set the baudrate to 115200, see the baudrate register for UART and UARTE.
2. The example in the SDK already use the UARTE peripheral. 

regards

Jared