NRF 52832 UART High speed communication

[Pavan Kote]

Hi,

Please give me  a porting or integrate  guide or manual of "LIBUARTE" with ble peripheral softdevice example. Please share a source code if any.

[Jørgen Holmefjord]

Hi,

I created a modified version of the ble_app_uart example that replaces the app_uart library with libUARTE: ble_app_libUARTE_sdk1702.zip

The ZIP includes diff files to see the required changes to the original project(s). The most important thing to remember when integrating the libUARTE library with a softdevice project, is to chose resources (TIMERs/RTCs) that are not used by the softdevice.

Best regards,
Jørgen

[mbozic]

Great! Will try it right away. Thanks!

How to know which resources SD uses? I guess it should be in the SD manual?

[Pavan Kote]

Hello Jorgen,

I am struggling while integrating the libuarte with ble peripheral example. It really saves lot of effort because i am in hot position while proving using Normal ble_uart library we cannot achieve higher uart speed. Because i am getting UART Overrun Error.

Thanks & Regards

Pavan Kote 

[Jørgen Holmefjord]

Yes, it can be found on this page.

[mbozic]

Trying to implement libuarte to existing project with SDK16.

Getting a really weird errors:

static assertion failed: "Timer instance not enabled"

It fails in nrf_libuarte_async.h. line 240, this line:

NRF_LIBUARTE_DRV_DEFINE(CONCAT_2(_name, _libuarte), _uarte_idx, _timer0_idx);\

libuarte is defined in my uart.c at the beginning of file like this:

NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

Which means instance of TIMER 1 is used.

And in sdk_config.h I have

#define NRFX_TIMER_ENABLED 1

and

#define NRFX_TIMER1_ENABLED 1

which means it should work...no?

The second error:

'NRFX_TIMER1_INST_IDX' undeclared here (not in a function); did you mean 'NRFX_TIMER_INSTANCE'?

I don't understand...

Any help is appreciated!

[mbozic]

Nevermind, it was "apply_old_config.h", should have defined TIMER_ENABLED and TIMER1_ENABLED. Compiles now.