DTM UART error

[pungent1188]

Hello,

We are preparing nrf52832xxAA for certification,

Im trying to compile DTM from nRF5_SDK_17.1.0 (same issue on v16.0)

Default UART pins run fine without error
  #define RX_PIN_NUMBER  8
  #define TX_PIN_NUMBER  6
 
but we need to remap them to
  #define RX_PIN_NUMBER  10
  #define TX_PIN_NUMBER  12

Then I always get UART ERROR EVENT, eventhough I pulled up both pins to 3.3V. Voltages are correct. Also tried to enable internal pullup on RXD, same outcome.
Looks like UART is not happy on those port.

datasheet says UART can be remapped to anything. I don't see anything using those pins in DTM.

No matter if we use our board or pca10040 with pull ups.

[Kazi Afroza Sultana]

Hello,

In nRF52832, P0.09 and pin P0.10 are configured P1NFC antenna pins. That's why you have seen this error. You can try to use another available pin or can follow the instruction described here (+) Unable to configure pins 8 & 9 as SCL and SDA on BMD300 (nrf52832) - Nordic Q&A - Nordic DevZone - Nordic DevZone.

Thanks,

BR
Kazi

[pungent1188]

Thank you that worked, I had to define CONFIG_NFCT_PINS_AS_GPIOS 

Not sure why it was decided to have NFC enabled by default, most people are not even using NFC.

datasheet is still misleading:

[Kazi Afroza Sultana]

Hello,

I am glad that it helped. Yes, I understand that specific part is misleading. 

It is also written here NFC antenna interface how to use NFC pins as GPIO pin on nRF5 SDK.