UART not working

[Willtjam]

The example ble_app_uart is working fine (i.e. I get NRF_LOG_INFO from gatt_evt_handler), but my code doesn't. I've checked the diff between them and tried adding all diffs in the sdk_config.h without success. There must be some small thing that I'm missing, but I can't find it.

When I connect via nRF UART app it connects instantly but doesn't show any logs. If I however connect to ble_app_uart example, it takes a second and shows a log info.

Gist for main.c

Gist for sdk_config.h

[Priyanka]

Hi William,

Could you specify which DK or board you are using (as mentioned by lm) ?

Regards,

Priyanka

[Willtjam]

Of course, my bad: It's an nRF52-DK  (nRF52832).

[Priyanka]

Hi,

I ca see that you have initialized some new functions. Could you tell me what changes you wish to have implemented in the ble_app_uart sample? Are there any errors when you build your code?

-Priyanka

[Willtjam]

Is there a particular function you're referring to? I've attached a display via TWI using u8g8 library.

I've now also checked the diff between the Makefiles but it didn't help.

[Priyanka]

Hi,

Do you mean the u8g2 library? Also, what display are you using? Maybe you could try referring to this ticket and also this.

-Priyanka

[Willtjam]

Yes, u8g2 library. I was a bit quick on the keyboard.

The display (DFR0650) is working as intended with the library and I've set it up with TWI, so that's not a problem. I want to use UART to communicate via the nRF UART app.

Have you had a chance to glance over my sdk_config or code? Is there anything that stands out?

[Priyanka]

Hi William,

There could be a problem if you are enabling the SoftDevice. When you enable the SoftDevice, some peripherals and their interrupts are reserved for the SoftDevice and then if your TWI interrupt priority is same as those reserved for the SoftDevice, the SoftDevice will preempt the TWI driver.

Kindly check the interrupt priority levels for the S112.

Regards,

Priyanka