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Last activity 2017-09-22 14:23:06 +0200 by supernovah

Printf on 52840 causes Hard Fault in _Balloc

Hey there,

I'm using the nRF52840 and have all sorts of problems trying to using dynamic memory allocation. I'm trying to develop on an example project from ./examples/ble_peripheral/ble_app_uart. Firstly I had to modify the project because ... (more)

49
views
1
vote
1
answer
Last activity 2017-09-21 04:21:40 +0200 by RK flag of Singapore

BLE Adv Interval

I am working on S140 on nRF25840. I am using the ble_app_beacon sample. I want to set the advertising interval smaller than 100ms while using non-connectable mode. But the BLE_GAP_ADV_NONCON_INTERVAL_MIN stops me. I wonder if there is any reason to ... (more)

56
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no
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no
answers
Last activity 2017-09-19 12:44:51 +0200 by VoidGreen

NRF52840 USB MSD without optimizations

Hello,

I am currently trying to make an MSD RAM disk with nrf52840 nRF5_SDK_14.0.0 with O0 optimization level. And had no success. For some reason in Keil example O3 is used. If I set O0 then it stops ... (more)

32
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no
votes
1
answer
Last activity 2017-09-19 09:52:54 +0200 by Jørn flag of Norway

AQFN73 layout specification

I'm trying to create a footprint for the NRF52840, and I can't find a layout specification for this package. I'm able to find a mechanical drawing here:

http://infocenter.nordicsemi.com/inde...

But this is insufficient as ... (more)

21
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no
votes
1
answer
Last activity 2017-09-18 08:31:36 +0200 by Bjørn Spockeli flag of Norway

nRF52840 BLE Cryptocell

With the nRF52840 S140 SDK 13, does BLE encryption use the Cryptocell?

42
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no
votes
1
answer
Last activity 2017-09-15 04:30:05 +0200 by RK flag of Singapore

Where/How are UART interrupt handlers set on nrf52840?

SDK Version: 13 Alpha

I've been able to track down, through app_uart.h, where UART interrupt priorities are set using NVIC_SetPriority(). Now I'd like to know where interrupts are mapped to there associated handler.

I have already fruitlessly ... (more)

168
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1
vote
2
answers
Last activity 2017-09-14 22:36:30 +0200 by newtom

nRF52840 USB hardfault

Hello,

I am evaluating the USB audio example from SDK v14 with an nRF52840-Preview-DK (PCA10056, V0.9.2, 2017.25).

SW9 is set to VDD power, SW6 is set to DEFAULT. The board is connected over both USB connectors to ... (more)

23
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no
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answers
Last activity 2017-09-14 17:02:12 +0200 by Nivetha flag of Netherlands

central stops receiving after sometime

Hi,

Central: nrf52840

peripheral: nrf52840

Connection interval (both min & max) = 10ms

ATT_MTU size: 52 bytes

Dle: 52+4 bytes

Connection event extension: enabled

Slave latency: 0

Connection supervision timeout: 4s

PHY: 1MBps

softdevice: 140

I'm transmitting 10 samples wrapped ... (more)

55
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no
votes
1
answer
Last activity 2017-09-14 13:29:05 +0200 by Jakub Rzeszutko

NRF52840 UART1 not working in SDK 14

I'm trying to run two UARTs out of my NRF52840. Do you have an example in which both SoftDevice UARTs are used? The Nordic Infocenter SDK 14.0.0 documentation lists one of the advantages of the new serial ... (more)

76
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1
vote
1
answer
Last activity 2017-09-14 12:09:45 +0200 by Martin Børs-Lind flag of Norway

Unit tests: how to mock nrf_drv_gpiote.h ? (_WIN32 prevents nrf.h to include my platform bitfield header)

Hello,

I'm using Ceedling, Unity + CMock to implement unit tests but I'm running into issues when it comes to mocking nrf_drv_gpiote.h.

I'm trying to test a file, call it foo.c, which includes nrf_drv_gpiote.h, therefore ... (more)

19
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1
vote
1
answer
Last activity 2017-09-13 17:08:09 +0200 by Sigurd flag of Norway

app_sdc_init assert when using P0.0

In the file app_sdcard.c of the SDK13.0.0, an assert is done when calling app_sdc_init() with a pin P0.0. Can i safely use P0.0 with the assert deactivated or should i use another pin ?

ASSERT(p_config- ...
(more)

25
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no
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no
answers
Last activity 2017-09-12 15:15:09 +0200 by marmio

Openthread CoAP - communication initiated by server?

Hi,

I'm developing multiprotocol applications based on examples from Thread SDK: Proximity/CoAP server and BLE UART/CoAP client. All CoAP communication in this examples is initiated from client by sending requests, but I'd like to have a ... (more)

45
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no
votes
no
answers
Last activity 2017-09-11 18:38:03 +0200 by Davide

concurrent connections parameters

Hello, I'm working on a concurrent role device (advertiser+scanner+peripheral+central) and devices are configured to connect each other in a mesh-like way (Note: I'm not using BLE MESH!). I noticed that the connection events seems to ... (more)

128
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no
votes
1
answer
Last activity 2017-09-11 10:58:36 +0200 by Jørgen Holmefjord flag of Norway

GPIO control in OpenThread

Hi,

The SoftDevice uses the GPIO pin and port abstraction to configure and control IO's. When developing in Thread, how does one access and control the nRF52840 GPIO's using the Thread SDK?

190
views
3
votes
2
answers
Last activity 2017-09-09 20:18:59 +0200 by Roger flag of South Africa

DK Li-Po battery [closed]

Dear All,

I would like to order Li-Po batteries for my nRF52840 development kits and need some information. From the battery, what type of female battery connector is needed to plug into the board?

Kind regards,

Roger

61
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no
votes
no
answers
Last activity 2017-09-09 20:06:27 +0200 by Roger flag of South Africa

External battery supply issue to DK

Hi,

I'm supplying a DK with an external battery source plugged into J6 (Li-Po) and the nRF power source switch set to VDD. When I flash the chip with one of the Openthread client examples, the DK operates normally ... (more)

115
views
no
votes
1
answer
Last activity 2017-09-08 15:46:55 +0200 by Bjørn Spockeli flag of Norway

Error "Variably modified at file scope" nrf_atfifo.c

Hello, I have an error while building the project "ble_app_hrs_rscs_relay_pca10056_s140" with sdk14.0.0 on segger embedded studio 3.26 and gcc/clang.

When compiling nrf_atfifo.c, is says "variably modified 'do_assert' at file scope", and I'm redirected to ... (more)

19
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1
vote
no
answers
Last activity 2017-09-08 07:00:12 +0200 by hg.song

BLE L2CAP Test with PTS

Hi, I have used nRF52840-PDK. And I want to test profile and protocol with PTS. I succeeded in GATT-based service test and GATT test with PTS.

But when I try to L2CAP test, PTS makes message and doesn't conduct ... (more)

60
views
no
votes
1
answer
Last activity 2017-09-08 00:04:13 +0200 by steve

nrf_fstorage_sd not receiving SOC events

Hi,

I'm developing an application for nrf52840 that's essentially based on both the USB MSC example and the BLE NUS example in SDK 14. I started with the USB MSC example, wrote a block device driver so I ... (more)

113
views
6
votes
1
answer
Last activity 2017-09-07 23:22:10 +0200 by Krzysztof Loska flag of Poland

NRF52840 Thread example power down 10 mins after USB disconnect

Hello,

I am trying the Thread Cloud COAP Client

<InstallFolder>\examples\thread\experimental\cloud_coap_client

on a NRF52840 PDK. I'm using Thread SDK v0.10.0. The example works as described.

However, when I unplug the board from USB, it ... (more)

35
views
no
votes
no
answers
Last activity 2017-09-07 16:45:33 +0200 by Nathan Morsa

Radio not working when RTT is in use

We are using a nRF52840 (QIAAAA) on a custom board which replicates exactly the schematic used by the development kit (PCA10056). When using Segger RTT for debugging purposes, the board does not emit any BLE packets (no errors are reported ... (more)

27
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no
votes
no
answers
Last activity 2017-09-06 23:25:16 +0200 by mjw

PCA10056 erase error

I'm using a PCA10056 (NRF52840 Preview DK) v0.9.1, and trying to erase the existing firmware, but running into issues.

I've tried nrfjprog -f NRF52 --eraseall with version 9.6.0 of the NRF Tools and version ... (more)

101
views
1
vote
1
answer
Last activity 2017-09-06 17:02:01 +0200 by tperson flag of France

hrs_rscs_relay sd_ble_gap_adv_data_set error code 00000010

Hello,

I'm trying to use ble_app_hrs_rscs_relay_pca10056_s140 on a nRF52840 Preview DK using example from SDK 13.0.0_04a0bfd.

When I copy the precompiled .hex file in the file explorer, everything is fine.

I have an issue when I try ... (more)

59
views
no
votes
1
answer
Last activity 2017-09-06 16:32:12 +0200 by Joakim Jakobsen flag of Norway

3 or 4 PWM in nrf52840

In the nRF52840 Objective Product Specification, there is 4 PWM in the key features but only 3 in the beginning of the PWM chapter.

44
views
no
votes
1
answer
Last activity 2017-09-04 09:59:51 +0200 by Hung Bui

nrfjprog read addresses in qspi external memory

I'd like to use nrfjprog to read contents of QSPI external memory. (I'm using an nRF52840-QIAA on a custom PCB, based on the PDK.)

Using application firmware I am able to successfully read and write to my external ... (more)

91
views
1
vote
1
answer
Last activity 2017-09-04 07:13:22 +0200 by vishal

nRF52840 TWIM Drive strength [closed]

Hi, On my single I2C Bus, I have interfaced 4 I2C slave devices.. Now my voltage level of this bus behaves randomly. sometimes It shows 3.3V, but most of the times It stays 1.6V, due to this 2 ... (more)

87
views
no
votes
no
answers
Last activity 2017-09-02 07:41:19 +0200 by Roger flag of South Africa

S140 RAM allocation running ble_app_uart example

Hi All,

I'm busy exploring the ble_peripheral_uart example and ran into a couple of issues I don't fully understand. Upon flashing the S140 SoftDevice and application program to the nRF52840, the following is observed:
1.) The advertising LED ...
(more)

27
views
no
votes
no
answers
Last activity 2017-08-31 13:35:36 +0200 by Nivetha flag of Netherlands

Trouble in interpreting the temperature service data at central

I modified the HTS service to send notifications and read property at the peripheral. It notifies the simulated temperature every 1 sec in Celsius type. I tried writing HTS service at the central to receive the notifications similar to battery ... (more)

123
views
no
votes
no
answers
Last activity 2017-08-31 00:56:31 +0200 by Austin

nRF52840, SDK 14.0.0 and tickless idle FreeRTOS - some suggestions

This post is more about some suggestions for review rather than a question.

I've been looking at implementing a project using the nRF52840, SDK 14.0.0 and FreeRTOS in a low power application. The release note for SDK ... (more)

82
views
2
votes
1
answer
Last activity 2017-08-30 14:17:48 +0200 by Petter Myhre flag of Norway

Maximum value for ATT_MTU size for 10ms connection interval

I'm transmitting data packets each of 48 bytes in the form of notifications using Bluetooth 5.0. When I observed the logs over sniffer, I see that the packets are fragmented which is shown as CRC errors and L2CAP ... (more)

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