UART connection of nRF 52840-DK and LTC 5800-WHM

RE: UART connection of nRF 52840-DK and LTC 5800-WHM

katokatsu6412 — Wed, 10 Oct 2018 01:35:26 GMT

I made a UART connection with the following connection and confirmed the operation.
LTC 5800 - WHM ------------- nRF 52840
   HART_UART_TX ---------- UART_RX (Input)
   HART_UART_RX ---------- UART_TX (Output)
   HART_UART_TX_CTSn --- UART_RTS (Output)
   HART_UART_TX_RTSn --- UART_CTS (Input)

· Although a start notification is being sent from LTC 5800-WHM to nRF 52840, it was confirmed in nRF 52840 that a reception interrupt will not be entered unless transmission processing is performed once.
- A response message was sent to the activation notification from the LTC 5800-WHM, but it was confirmed that the LTC 5800-WHM has not received it.
· We are currently checking where processing stops.

RE: UART connection of nRF 52840-DK and LTC 5800-WHM

awneil — Tue, 09 Oct 2018 11:23:14 GMT

[quote userid="73001" url="~/f/nordic-q-a/39279/uart-connection-of-nrf-52840-dk-and-ltc-5800-whm/152192"]I confirmed by UART sample code.[/quote]

and have you confirmed that it's still working with your actual code?

What debugging have you done to see what's going wrong now?

In particular, are you sure that the flow control is working?

RE: UART connection of nRF 52840-DK and LTC 5800-WHM

katokatsu6412 — Tue, 09 Oct 2018 11:14:27 GMT

>> Have you confirmed your basic serial connections & configurations?
>> 1. Can you communicate between just the nRF 52840-DK and a PC terminal?
Yes, communication is done.
I confirmed by UART sample code.

>> 2. Can you communicate between just the LTC 5800-WHM and a PC terminal?
Yes, I can communicate.

RE: UART connection of nRF 52840-DK and LTC 5800-WHM

awneil — Tue, 09 Oct 2018 07:30:03 GMT

Have you confirmed your basic serial connections & configurations?

Can you communicate between just the nRF 52840-DK and a PC terminal?
Can you communicate between just the LTC 5800-WHM and a PC terminal?

More tips on serial comms debug: https://www.avrfreaks.net/comment/2336161#comment-2336161

and follow the link to https://www.avrfreaks.net/comment/2306116#comment-2306116