NRF 52832 UART High speed communication

RE: NRF 52832 UART High speed communication

Muqarrab — Tue, 03 Aug 2021 11:17:13 GMT

Jørgen Holmefjord I have successfully built the project. I am using nRF52840 as a peripheral + want to add UART to communicate with like Arduino and GSM. Is this project can be used for this purpose?

RE: NRF 52832 UART High speed communication

Jørgen Holmefjord — Tue, 03 Aug 2021 11:11:06 GMT

[quote user="muqarrab_rahman"]I have checked this and its already RAM1.[/quote]

Yes, it is set to RAM1 because the project is created for SDK 17.0.2. If you plan to stick with SDK 17.0.0, you need to change this back to RAM, as this is what the toolchain expects in SDK 17.0.0.

[quote user="muqarrab_rahman"]How can I check this? kindly guide. Thanks[/quote]

Same goes here, you need to change it back to RAM in the common project options:

RE: NRF 52832 UART High speed communication

Muqarrab — Tue, 03 Aug 2021 10:35:54 GMT

[quote userid="14926" url="~/f/nordic-q-a/71665/nrf-52832-uart-high-speed-communication/323048#323048"]1. In the flash_placement.xml file: MemorySegment name must be changed from "RAM" to "RAM1": <MemorySegment name="RAM1" start="$(RAM_PH_START)" size="$(RAM_PH_SIZE)">[/quote]

I have checked this and its already RAM1.

[quote userid="14926" url="~/f/nordic-q-a/71665/nrf-52832-uart-high-speed-communication/323048#323048"]2. In the .emProject file: In "linker_section_placements_segments" you must refer to "RAM1", replacing "RAM": linker_section_placements_segments="FLASH RX 0x0 0x100000;RAM1 RWX 0x20000000 0x40000"[/quote]

How can I check this? kindly guide. Thanks

RE: NRF 52832 UART High speed communication

Jørgen Holmefjord — Tue, 03 Aug 2021 10:23:28 GMT

You need to use nRF5 SDK v17.0.2 with this project, it seems you are using v17.0.0.

See this section in the SDK release notes:

Compatibility of SES projects:

Updates and fixes in the MDK used by Segger Embedded Studio break backwards compatibility
with old SES project files.
To use old projects in combination with this version of the SDK (MDK),
make the following updates:

1. In the flash_placement.xml file:
   MemorySegment name must be changed from "RAM" to "RAM1":
   <MemorySegment name="RAM1" start="$(RAM_PH_START)" size="$(RAM_PH_SIZE)">

2. In the .emProject file:
   In "linker_section_placements_segments" you must refer to "RAM1", replacing "RAM":
   linker_section_placements_segments="FLASH RX 0x0 0x100000;RAM1 RWX 0x20000000 0x40000"

RE: NRF 52832 UART High speed communication

Muqarrab — Tue, 03 Aug 2021 10:19:29 GMT

Hi Jørgen Holmefjord
I am trying to implement your provided code but getting the following error. Can you please help?

RE: NRF 52832 UART High speed communication

mbozic — Wed, 17 Feb 2021 12:37:10 GMT

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

RE: NRF 52832 UART High speed communication

mbozic — Wed, 17 Feb 2021 12:09:19 GMT

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!

RE: NRF 52832 UART High speed communication

Jørgen Holmefjord — Wed, 17 Feb 2021 09:16:10 GMT

Yes, it can be found on this page.

RE: NRF 52832 UART High speed communication

Pavan Kote — Wed, 17 Feb 2021 07:00:21 GMT

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

RE: NRF 52832 UART High speed communication

mbozic — Wed, 17 Feb 2021 06:37:39 GMT

Great! Will try it right away. Thanks!

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

RE: NRF 52832 UART High speed communication

Jørgen Holmefjord — Tue, 16 Feb 2021 16:06:15 GMT

Hi,

I created a modified version of the ble_app_uart example that replaces the app_uart library with libUARTE: devzone.nordicsemi.com/.../ble_5F00_app_5F00_libUARTE_5F00_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

RE: NRF 52832 UART High speed communication

mbozic — Tue, 16 Feb 2021 09:12:39 GMT

I would like this to!