Connecting UART1 to a periph on nRF9160 DK

RE: Connecting UART1 to a periph on nRF9160 DK

Siyou — Fri, 10 Jan 2020 07:35:30 GMT

Update:

I can access UART1 to send AT cmd after changing the CONFIG_BSD_LIBRARY_TRACE_ENABLED=y to n.

what is meaning of the CONFIG_BSD_LIBRARY_TRACE_ENABLED=y?

RE: Connecting UART1 to a periph on nRF9160 DK

Siyou — Fri, 10 Jan 2020 05:55:01 GMT

Hi,

How to map the nrf9160 UART0 to VCOM0 and UART1 to VCOM2 at the same time?

According to the DK user gudie, it stated pin 28&29 was connected to VCOM0 and pin 0&1 was connected to VCOM2 in default, but I cannot access UART1 via VCOM2 for CONFIG_SLM_CONNECT_UART in serial_lte_modem sample.

RE: Connecting UART1 to a periph on nRF9160 DK

Nico_ID — Fri, 29 Mar 2019 09:15:51 GMT

You're welcome !

At least I'm not crazy, I almost smashed my head on the wall while understanding what I was doing wrong.

RE: Connecting UART1 to a periph on nRF9160 DK

Martin Lesund — Fri, 29 Mar 2019 08:57:01 GMT

Hi Nico,
Sorry, I forgot to address that question in your original post.

You are totally correct in your findings, it should be opposite.

It has been reported internally so it will be fixed in the next revision.
Thank you again for the feedback!

Best Regards,

Martin L.

RE: Connecting UART1 to a periph on nRF9160 DK

Nico_ID — Thu, 28 Mar 2019 15:47:15 GMT

Thanks for that very detailled answer.
Let me check that...

In the meantime, can you comment on nRF9160 spec, chapter "5.7.1 nRF9160 DK board control" which states that default config should be PIN header, while it appears to be the opposite ?

RE: Connecting UART1 to a periph on nRF9160 DK

Martin Lesund — Thu, 28 Mar 2019 14:47:07 GMT

Hi Nico,

The different options that you can change in the board controller can be seen in the Kconfig file to the nrf52840_pca10090.

So we need to build and flash a new application on the nrf52840 to route the pins.

If you want to route the UART0 from VCOM0 (default) to the external pins (P0.26 - P0.29) we need to reflash the Board Controller (nrf52840) so it routes the pins differently.

This can be done by just adding the following:

CONFIG_BOARD_PCA10090_UART0_ARDUINO=y

in the prj.conf file in for example the hello_world sample and build it for the nrf52840_pca10090 board.

The same goes for when you want to route UART1 to the external pins (P0.01, P0.00, P0.15 and P0.14)

Add the following:

CONFIG_BOARD_PCA10090_UART1_ARDUINO=y

in the prj.conf file.

Adding a precompiled board controller application for routing out UART1 to the external pins:

devzone.nordicsemi.com/.../board_5F00_controller_5F00_uart1.hex
Flash with command line: nrfjprog --program boardcontroller_uart1.hex -f nrf52 --sectorerase -r --verify

When flashing the nrf52840 remember to have the SW5 to nrf52.

Example with interfacing with UART0:

Here you can see how I connected the TTL-232RG-VIP-WE with the nrf91DK with UART0:

So here I am running at_client sample on the nrf91 and use the UART from the TTL to send/receive AT-Commands:

Best Regards,

Martin L.