Mapping LGA pins (TX and RX) to any castellated pins on the nrf52840 (Fanstel BT840F module) internally in software?

RE: Mapping LGA pins (TX and RX) to any castellated pins on the nrf52840 (Fanstel BT840F module) internally in software?

fe7565 — Tue, 27 Oct 2020 20:56:12 GMT

Thank you. Will dive in deeper in the guides about the pins.

RE: Mapping LGA pins (TX and RX) to any castellated pins on the nrf52840 (Fanstel BT840F module) internally in software?

Edvin — Tue, 27 Oct 2020 09:23:59 GMT

As for the arduino part, I would check this in an Arduino forum. I think you have a better shot there.

As for the nRF52840, most of the pins are SW configurable. The SW... pins are some of the exceptions. Aim for the pins named PXYZ. I assume this refers to PX.YZ (P0.00 - P1.15). If the nRF52840 has an external LFXTAL, you should reserve pin P0.00 and P0.01 as well.

BR,

Edvin

RE: Mapping LGA pins (TX and RX) to any castellated pins on the nrf52840 (Fanstel BT840F module) internally in software?

fe7565 — Mon, 26 Oct 2020 22:33:17 GMT

Thank you for the reply. The chip I plan to use would be either the Atmel AVR 328p or the 32u4 MCUs. The 32u4 already has native USB support. The 32u4 (or 328p) would be hardwired to the NRF52840 via UART.

What I am hoping to replicate is the Adafruit Feather 32u4 Bluefruit LE module. It has a 32u4 MCU and a NRF51822 on the same board connected via SPI. I want to replace the NRF51822 with a NRF52840 and use UART. I figured that that would be the easiest by modifying the Adafruit Arduino firmware written for the NRF52840.

The NRF51822 does not have a strong enough BLE signal even at +4db, and I hope the NRF52840 at +8db would work. The Fanstel NRF52840 "BT840F" is I think amplified to +18db.

The code snippet is Nordic, but I hope to adopt it to Adafruit's Arduino firmware for the NRF52840 once I figure out the internal pin mapping of the NRF52840.

RE: Mapping LGA pins (TX and RX) to any castellated pins on the nrf52840 (Fanstel BT840F module) internally in software?

Edvin — Mon, 26 Oct 2020 15:31:34 GMT

[quote user=""]Just to emphasise, I am limited to the Arduino IDE. I have the Seger edu kit, but have not used it yet, nor do I have the NRF SDK.. I hope to stay with the relative safety of Arduino, unless no other options. [/quote]

If this is a requirement for you, you need to look into an Arduino forum. It is not something that we support. The code snippet that you found doesn't look very Arduino like. It looks like a snippet from our SDK.

To be honest, I am not sure about your HW setup. Do you have an Arduino chip which you want to communicate to the nRF52840 over UART, or is the arduino chip the nRF52840?