Questions tagged [nordic]
The nordic tag has no usage guidance.
21
questions
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Can I use VSYS output on NPM1100 as input to another regulator?
After designing a power system around an NPM1100 PMIC, we noticed that as our lipo battery decreases to around 3.55 V, the regulation out 3.0 V starts to drop (see graph below). We do have a sensitive ...
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0
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20
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Bluetooth uC SoM w/ antennae array for AoA direction finding? (or antenna array daughter card?)
I need Bluetooth AoA on custom PCB I'm designing to have manufactured & populated at a pcb shop. Using nrf53 because its well documented, Nordic's support seems good, and I've used the toolchain ...
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2
answers
59
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BL654 USB and Atmel chip on dev board
I don't understand the USB port on the BL654 Ble module. Is this something that is only required / functioning when one writes a program with the Nordic SDK? Or does it work using SmartBASIC as well? ...
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2
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237
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NRF52 - unexpected high power in idle mode
I am trying to program a low-powered Bluetooth Low-Energy sensor using an nrf52810 microcontroller. I am trying to minimize power consumption when the sensor is idle. I have created a minimum code ...
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3
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684
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Possible ESD damage on UART pins between nRF52840 and ATmega1284P
I have devices operating from 2S Li-ion battery (max 8.4V).
They consist of 2 PCBs - the first one contains a 3.3V voltage regulator and an ATmega1284P, while the second one has MDBT50Q-U1MV2(nRF52840 ...
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151
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How can I perform a DFU from an ESP32 to the nRF52840?
I have a nRF52840 and an ESP32 and I want to perform a DFU to nRF52840 from ESP32, supposing I have the signed binary file in the ESP32. I was already able to perform the DFU to nRF52840 using MCUboot,...
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1
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636
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Question about the nRF Connect SDK v2.1.0 - Zephyr adc example using nRF52840 (PCA10056)
I am trying to understand the ADC example using PCA10056.
In the DT file, there are two different ADCs in the device tree ...
- 133
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1
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532
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Zephyr nrf52840DK LED GPIO question
I have a nordic nrf52840dk board. Using the Zephyr RTOS. I can see the following device tree source
...
- 133
4
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2
answers
831
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Connecting Led to push-pull instead of open-drain
I am using the PCA10056 Nordic dev board which integrate a nRF52840.
The following LEDs are wired to some of the MCU GPIOs.
Currently, my MCU firmware configures those GPIOs as Push-pull output.
But I ...
1
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0
answers
192
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can't view the transmitted bytes over UART on the received end as expected
I wrote a simple function to transmit the data over UART on nRF52 but having trouble seeing data on the receiving end: terminal.
Every time I transmit something, it comes out as ? in a serial console, ...
- 325
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718
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How to flash a Zephyr RTOS sample project to the nrf52840 dongle using J-Link Base debugger and SWD
I'm a beginner at this, I'm a software developer so I've never worked with hardware but now I need to and I don't seem to be able to make it work.
I would need help as to how can I flash a Zephyr RTOS ...
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1
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137
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Connecting development board board to sensor [closed]
I am trying to connect a Nordic nRF52840DK board to the LSM6DSL sensor (accelerometer) on a STEVAL-MKI178V2 adapter board. The goal is to successfully connect the devices and test the sample program ...
1
vote
1
answer
332
views
Flashing nRF9160 on a custom board with FTDI UART converter or nRF5340DK?
I'm working on a custom board with nRF9160, I want to flash it with the asset tracker sample, however, I do not own a J-link device. What I have is a FTDI USB-UART converter, a nRF5340DK board, a ST-...
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189
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Interrupt handler starts behaving unexpectedly when scheduler runs
I have an IRQ handler that gets fired upon receiving a character over serial, and everything is fine until I run a FreeRTOS scheduler inside main, and now what I see is IRQ handler still getting ...
- 137
1
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372
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How to read / write data into a S25FL064L flash memory?
I try to read / write data (single byte) into an S25FL064L SPI flash memory with an nRF52 based radio SoC. The datasheet says that I have to enable a write to ...
- 422
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1/4 WL Strip Antenna Questions
I'm designing a module around the nRF52832 SOC and I need some help regarding the single-ended microstrip antenna. I have three questions, so please bear with me.
The first question is about how wide ...
- 177
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1
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469
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Trouble reading a byte from external Flash via SPI
I am using a BMD-340 module based on the nRF52840 Microcontroller.
I am interfacing with AT25SF041 flash memory.
I am writing a byte to a specific address in Flash.
But when I try to read the ...
- 79
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1
answer
276
views
Using ulink2 with nrf52840 and keil
I am trying to flash the blink example from SDK v15 into my custom nrf52840 board, I am using pc10056 example.
I connected my ulink2 to swdio, swclck, gnd and vcc of my custom board and I can see on ...
- 101
0
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1
answer
386
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nRF52382 low power RTC data lost
Posting here, since Nordic DevZone is broken for me (Made a long post that didn't upload, just kept loading).
I am currently approaching this from HW point of view (I personally not developing ...
- 137
3
votes
1
answer
100
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Best communication scheme for a battery-powered Bluetooth LE display?
I have a battery-powered design that I am working on using a Nordic NRF52832. The device is intended to connect to a smart phone and upon receiving a particular message from the phone, flash some LEDs ...
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4
votes
1
answer
2k
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What are the resource requirements (RAM, flash) of the latest Nordic Bluetooth Low Energy (BLE) stack?
I want to understand how much RAM and flash I have available for my own program memory and program space after I incorporate the overhead of Bluetooth communication when using an nRF51822.
https://...
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