Question) Serial Output (UART)

RE: Question) Serial Output (UART)

Jørgen Holmefjord — Wed, 11 Nov 2020 19:34:59 GMT

[quote user="LeeJooSang"]Currently, using NRF_LOG_INFO() and printf() at pca10056(nrf 52840) does not output from 'Tera term' or 'putty', so it is not possible to verify that the log is taken properly except for Debug mode.[/quote]

Sounds like only the RTT backend is enabled for the logger module, and not the UART backend. Have a look at the sdk_config.h options for how to enable UART backend.

[quote user="LeeJooSang"]

I want log only to be printed from pca10056 but it is also delivered to the connected board, and the connected board contains the wrong command, and errors continue to occur.

Currently, pca10056(nrf 52840) is connected by PC and USB, and other boards are connected by 6pin(TX) and 8pin(RX). Are UART and 6,8pin UART of PCtoUSB the same?

[/quote]

By default, the UART logger backend uses GPIO P0.06 for the UART TX pin. This is connected through the Interface MCU on the DK, which handles the virtual USB COM port. I would recommend that you connect the external board through other pins. You should also make sure that you use UARTE1 instance for the nrf_serial library if you want to continue using UART(E)0 for the logger.

Finally, note that the nrf_serial library is removed in nRF5 SDK v17.0.0 and above, instead we recommend using the libUARTE library. If you plan to migrate to later SDKs eventually, you should reconsider using nrf_serial.

RE: Question) Serial Output (UART)

LeeJooSang — Wed, 11 Nov 2020 02:38:40 GMT

Hi, Jørgen Holmefjord.
Thank you for your reply.

I'm sorry that I'm not good at English because I'm Korean.

What I want is not to use the function 'nrf_serial_write' from the serial sdk, but to print the log from 'Tera term' or 'putty'.

Currently, using NRF_LOG_INFO() and printf() at pca10056(nrf 52840) does not output from 'Tera term' or 'putty', so it is not possible to verify that the log is taken properly except for Debug mode.

However, using 'nrf_serial_write' it also passes to other connected boards and logs are printed on the 'nordic' board.

I want log only to be printed from pca10056 but it is also delivered to the connected board, and the connected board contains the wrong command, and errors continue to occur.

Currently, pca10056(nrf 52840) is connected by PC and USB, and other boards are connected by 6pin(TX) and 8pin(RX). Are UART and 6,8pin UART of PCtoUSB the same?

[quote userid="14926" url="~/f/nordic-q-a/68163/question-serial-output-uart/279299#279299"]Not sure what you mean by this. Do you want a CLI?[/quote]

I want to enter a command from the pca10056 board and send it to another board. Like zigbee_cli_agent, for example.

Best regards.

RE: Question) Serial Output (UART)

Jørgen Holmefjord — Tue, 10 Nov 2020 14:22:24 GMT

Hi,

I'm not very familiar with Tera term, but you can try turning off the "local echo" feature if that is enabled.

[quote user=""]Is there a way to write and send cammand in 'Tera term' or 'putty' instead of in debugging mode like cli-agent in zigbee?[/quote]

Not sure what you mean by this. Do you want a CLI?

Best regards,
Jørgen