Config P1.00 and P1.01 as UART0 RX and TX

RE: Config P1.00 and P1.01 as UART0 RX and TX

Rory Morrison — Fri, 16 Sep 2022 11:24:57 GMT

Hi,

I'm trying to use P1.00 on SDK 2.1.0 (having just updated from 1.8.0) and I still don't seem to be able to use the pin after following your fix here.

I've disabled gpio_fwd in the app overlay, and added the Child Image config and overlay. Is there anything else I need to do, or maybe changes to the latest SDK that change the way to do this?

Thanks,

Rory

EDIT:

Turns out the fix above does work, I just had other problems introduced by updating to the new SDK. Once I tracked down all the changes I had P1.00 working fine.

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Tue, 09 Aug 2022 07:16:59 GMT

Hi Oivind,

Yes, it is working. Thank you so much

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Fri, 05 Aug 2022 12:12:51 GMT

Hi,

Yes, it seems to work completely fine on my board. The nrf53 sets up 3 COM ports, the first one is normally used by the app core, and the second by the network core. When I flash your application, the app core uses the second COM port, and there is no activity on the first COM port, as expected. When I comment out the pin assignments in the app core overlay, it uses the first COM port, also as expected.

I don't see any issues on the board side, so you might want to double check your TTL converter/terminal setup. For example that you are looking at the correct port?

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Fri, 05 Aug 2022 10:38:21 GMT

Hi oivind,

did you verify?

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Thu, 04 Aug 2022 13:32:01 GMT

kindly, check the below attachment.

devzone.nordicsemi.com/.../peripheral_5F00_uart_5F00_test.zip

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Thu, 04 Aug 2022 11:40:05 GMT

Could you zip and attach your project, including the build folder?

I can make this case private if that is necessary for you to attach your project.

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Thu, 04 Aug 2022 10:01:39 GMT

Hi oivind.

are you there?

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Thu, 04 Aug 2022 02:03:35 GMT

Hi oivind,

I am waiting for your response.

Thanks & regards

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Tue, 02 Aug 2022 15:04:17 GMT

Hi oivind,

I have made the changes as per your guidance. Still i am not getting output in terminal.

Regards,

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Tue, 02 Aug 2022 14:43:22 GMT

This has to be done in the SDK.

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Tue, 02 Aug 2022 13:35:58 GMT

Hi oivind,

I need to do this in my project itself or i need to do in nrf connect sdk

Regards,

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Tue, 02 Aug 2022 13:14:16 GMT

Sorry, forgot that you are on v1.9.1.

Instead of adding the gpio_fwd node, try opening zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340_cpunet_reset.c
and commenting out these lines:

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Tue, 02 Aug 2022 12:20:43 GMT

Hi Oivind,

After implementing the points which you shared. I have got the below error

Kindly, check and let me know the correction.

Thanks & Regards

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Tue, 02 Aug 2022 10:37:07 GMT

Add this to your overlay file for the app core:

&gpio_fwd {
    status = "disabled";
};

For the network core, add a folder called "child_image" to your project, at the same location as your CMakeLists.txt file.
In this folder add a file named "hci_rpmsg.overlay" and a file named "hci_rpmsg.conf". These files will be automatically applied to the network core child image.

In hci_rpmsg.overlay:

&uart0 {
	status = "disabled";
};

In hci_rpmsg.conf:

CONFIG_SERIAL=n
CONFIG_UART_CONSOLE=n

This will disable the uart0 on the network core, and stop the app core from forwarding the pins.

Uart logging from the network core will be disabled.

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Tue, 02 Aug 2022 10:29:41 GMT

HI oivind,

We are waiting for your response regarding the further move.

Thanks & Regards,

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Mr.NCK — Mon, 01 Aug 2022 12:26:17 GMT

Hi Oivind,

[quote userid="81283" url="~/f/nordic-q-a/90563/config-p1-00-and-p1-01-as-uart0-rx-and-tx/379517"]but I can help you with disabling the uart on the network core and the gpio forwarding if you need to use those pins.[/quote]

I need this help. and also I need to know "changing these pins will not affect the BLE function or other functions right "

Thanks & Regards

Navin

RE: Config P1.00 and P1.01 as UART0 RX and TX

Øivind — Mon, 01 Aug 2022 11:46:37 GMT

Hi,

P1.00 and P1.01 are by default forwarded to the network core for its uart, along with P0.10 and P0.11.

I recommend using other pins if possible, but I can help you with disabling the uart on the network core and the gpio forwarding if you need to use those pins.