Difference between revisions of "Devzone posts"

Latest revision as of 16:05, 20 March 2024

Keywords: Nordic Segger python script :: create_nordic_project.py :: create Nordic project dot py :: index.asp

--- Overview ---

This page a starting point for references (links) to Nordic Devzone posts and additional notes on their respective issues. This page also contains posts from Jared Wolff Community forum, an excellent technical resource for design matters IoT related, and also Zephyr RTOS related.

2021 Overview notes to review

On this page indentation of URLs highlights when one post refers or links to another.

Worth noting, Nordic Semi web site is organized into three domains:

Searching for articles, tutorials and other materials in one domain does not in general appear to find or capture search results in the other two Nordic Semi site domains. An on-line power profiling tool can be found indirectly at Nordic Devzone by entering search pattern "online power profiler". The link to the profiler for nRF91xx family parts is:

• https://devzone.nordicsemi.com/power/w/opp/3/online-power-profiler-for-lte Nordic Semi Online Power Profiler for nRF9160

Some related links to Nordic on-line power profiler:

• https://devzone.nordicsemi.com/power/w/opp Nordic power profilers for nRF91xx and nRF52 and 53 family SoCs and SiPs
• https://devzone.nordicsemi.com/power/w/opp/4/user-guide-lte Online power profiler user guide

A local wiki page is in progress as well relating to LTE modem commands, both universal ones and some of Nordic Semi's custom AT commands:

• LTE modem AT command notes

A helpful summary of all firmware development tools offered by Nordic Semi:

• https://infocenter.nordicsemi.com/topic/ug_gsg_ses/UG/gsg/nrf_tools.html

Nordic link to Segger and Segger Embedded Studio downloads:

• https://infocenter.nordicsemi.com/topic/ug_gsg_ses/UG/gsg/install_segger_tools.html

^ Nordic Semi Guides

• https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/hardware-design/posts/getting-started-with-current-measurements-on-the-nrf9160?CommentId=b6127988-c126-4d90-a566-86596e84a0f0

^ ncs Changes in Newer than 1.6.1 Release

• https://devzone.nordicsemi.com/f/nordic-q-a/87493/at-command-interface-library-removed-in-ncs-1-9-1

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^ Low Current Related

2022

0615
• https://devzone.nordicsemi.com/f/nordic-q-a/89013/nrf52840dk-high-current-consumption-when-using-lipo-as-power-source
0607
• https://devzone.nordicsemi.com/f/nordic-q-a/88693/power-optimisation-help nRF52840 and Zephyr power optimization
0415
Edge triggered interrupts require GPIO IN feature enabled, draws ~30uA:
• https://devzone.nordicsemi.com/f/nordic-q-a/70130/nrf9160-low-power-edge-interrupt
Developer request for hex file which puts nRF9160 "module" into ~7uA current use:
• https://devzone.nordicsemi.com/f/nordic-q-a/49661/nrf9160-low-power
Original linked low power guide:
• https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/hardware-design/posts/measuring-psm-idle-current-on-the-nrf91-dk
Newer guide:
• https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/hardware-design/posts/getting-started-with-current-measurements-on-the-nrf9160

Developer working to achieve microamp current draw on custom nRF9160 based board:

• https://devzone.nordicsemi.com/f/nordic-q-a/86989/nrf9160-low-power

Developer Parveen Palaparthi and Cortex-M33 task registers, TASKS_CONSTLAT and TASKS_LOWPWR registers. Also Devzone engineer mentions to use 3v3 rail for VDD_GPIO over 1v8 to avoid unintended current leak in nRF9160:

• https://devzone.nordicsemi.com/f/nordic-q-a/59812/m33-core-in-nrf9160-low-power-mode---constant-latency-mode

Post made prior to Devzone engineers recommending to create `[project_dir]/child_image/spm.conf` containing CONFIG_SERIAL=n to disable UARTs in Secure Partition Manager binary element of given Zephyr app:

• https://devzone.nordicsemi.com/f/nordic-q-a/57413/nrf9160-achieving-low-power-consumption


0414 Thursday . . .

 1011  # https://infocenter.nordicsemi.com/topic/ug_ppk2/UG/ppk/measure_current_source_meter.html
 1012  # https://devzone.nordicsemi.com/power/w/opp/3/online-power-profiler-for-lte
 1013  #
 1015  # https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/hardware-design/posts/measuring-psm-idle-current-on-the-nrf91-dk


0408

At Nordic Devzone issuing search string "nRF9160 configure PSM and eDRX" . . .
• https://devzone.nordicsemi.com/f/nordic-q-a/63075/nrf9160-psm-and-edrx-modes
Developers Shital, Hoang, Erik posting about modem PSM and eDRX modes, mention of asset_tracker nRF9160 sample app:
• https://devzone.nordicsemi.com/f/nordic-q-a/52282/how-to-programing-in-nrf9160-dk-for-psm-mode-and-edrx-mode/210357#210357
Need to asure Secure Partition Manager not using UART for any logging or other purpose:
• https://devzone.nordicsemi.com/f/nordic-q-a/64417/nrf9160-psm-and-edrx-mode-power-consumption-test/263413#263413
AT modem commands to set power saving mode parameters and eDRX params:
• https://devzone.nordicsemi.com/f/nordic-q-a/52441/how-to-use-psm-and-edrx-mode-in-custom-code/211688#211688
Cerca 2019 Q2, as of ncs v1.3.1 the enabling of PSM and eDRX does not leave a way for application firmware to be notified when modem wakes from power savings mode:
• https://devzone.nordicsemi.com/f/nordic-q-a/57053/abiding-by-the-negotiated-psm-edrx-timing-intervals
Cerca 2021 Q2, GPS use where PSM and eDRX are not available. Plus AT commands to return whether eDRX can be used, whether PSM can be used:
• https://devzone.nordicsemi.com/f/nordic-q-a/73431/latest-gps-lte-with-no-psm-or-edrx/303438#303438
Mention in third or fourth reply about SIM card minimum interval needed to deactivate, with respect to eDRX setting:
• https://devzone.nordicsemi.com/f/nordic-q-a/59610/psm-floor-value-double-8ua-instead-of-4ua-and-edrx-values-bigger-24ua-instead-of-19ua-compared-to-product-specifications-using-fw-1-1-1
To set the CONFIG_MQTT_KEEPALIVE equal to your polling interval . . .
• https://devzone.nordicsemi.com/f/nordic-q-a/68307/enabling-edrx-or-psm-mode-with-iot-1nce-net-sim
nRF9160 maximum device sleep period and maximum device reachable period:
• https://devzone.nordicsemi.com/f/nordic-q-a/48027/edrx-mode-psm-mode-sleep-mode-standby-mode-active-mode-power-consumption
Only necessary to set PSM and eDRX values once, LTE modem retains them, honors what values it can given mobile network provider:
• https://devzone.nordicsemi.com/f/nordic-q-a/42433/edrx-psm-mode-always-on/165548#165548


0407

• https://devzone.nordicsemi.com/f/nordic-q-a/73794/gpio-in-high-impedance---low-power/303981#303981

0405

• https://docs.jaredwolff.com/nrf9160-low-power-operation.html . . . "disconnect-sdo-sa0-pull-up;"
• https://devzone.nordicsemi.com/f/nordic-q-a/79303/zephyr-power-management-issues/329571#329571
• https://devzone.nordicsemi.com/f/nordic-q-a/86634/nrf52840dk-ppk-and-battery-life-estimation
An interesting code excerpt stumbled upon during exam of Jared Wolff's nfed v1.7.1 `active_sleep` sample app:

 770 int lte_lc_normal(void)
 771 {
 772         return lte_lc_func_mode_set(LTE_LC_FUNC_MODE_NORMAL);
 773 }
 774 
 775 int lte_lc_offline(void)
 776 {
 777         return lte_lc_func_mode_set(LTE_LC_FUNC_MODE_OFFLINE);
 778 }
 779 
 780 int lte_lc_power_off(void)
 781 {
 782         return lte_lc_func_mode_set(LTE_LC_FUNC_MODE_POWER_OFF);
 783 }
 784 
 785 int lte_lc_psm_param_set(const char *rptau, const char *rat)
 786 {
 787         if ((rptau != NULL && strlen(rptau) != 8) ||
 788             (rat != NULL && strlen(rat) != 8)) {
 789                 return -EINVAL;
 790         }
 791 
 792         if (rptau != NULL) {
 793                 strcpy(psm_param_rptau, rptau);
 794                 LOG_DBG("RPTAU set to %s", log_strdup(psm_param_rptau));
 795         } else {
 796                 *psm_param_rptau = '\0';
 797                 LOG_DBG("RPTAU use default");
 798         }
 799 
 800         if (rat != NULL) {


0404 - To reduce GPIO current draw (~270uA) on nRF5340:

• https://devzone.nordicsemi.com/f/nordic-q-a/86598/reduce-gpio-current-draw


0315

• https://devzone.nordicsemi.com/f/nordic-q-a/69557/periodic-current-spikes-on-sleep

^ DTS

2022

1027
• https://github.com/zephyrproject-rtos/zephyr/discussions/51733 - Zephyr discussions post on iis2dh driver and I2C instance ok discovery process
0503
• https://devzone.nordicsemi.com/f/nordic-q-a/87540/creation-of-custom-dts-file-for-describing-custom-device-connections

0623 Example call to device_get_binding(), part of several lines of supporting code:

• https://devzone.nordicsemi.com/f/nordic-q-a/76226/device_get_binding-keep-returning-null
• https://devzone.nordicsemi.com/f/nordic-q-a/74315/how-to-use-device_get_binding

^ To Configure Pins

2022

0628
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89425/how-exactly-do-you-enable-i2c0-i2c1-or-i2c3-on-the-nrf9160-dk

0503 ( <- note these dates reflect time of finding here at nn, not original post date of Devzone ticket )

Does nRF9160 have internal pull up resistors for i2c twim?
• https://devzone.nordicsemi.com/f/nordic-q-a/52455/does-nrf9160-have-internal-pull-up-resistors-for-i2c-twim
Post greater than four years old, discusses internal clocking diffs between nRF51 and nRF52 family parts:
• https://devzone.nordicsemi.com/f/nordic-q-a/36881/best-practice---delay-between-setting-pin-as-input-with-pull-up-pull-down-and-reading-the-pin

xx-xx

• https://devzone.nordicsemi.com/f/nordic-q-a/14272/using-gpio-10-nfc-pin-to-drive-spi-sclk




^ Display Devices

GPIO and display related posts:

• https://devzone.nordicsemi.com/f/nordic-q-a/89208/zephyr-ws2812-driver-undefined-reference-to-__device_dts_ord_68




^ SPI and I2C

2022

1024
• [unsolved] https://devzone.nordicsemi.com/f/nordic-q-a/79080/including-specific-sensor-header-files . . . post related to DT_ANY_INST_ON_BUS_STATUS_OKAY issue

0628

• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89429/zephyr-sdmmc_spi-c-driver-is-very-disappointing-is-there-an-alternative-choice
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89434/nrfx-spim-and-zephyr-spi




^ To Configure Pins as Analog Inputs

0331

• https://devzone.nordicsemi.com/f/nordic-q-a/73594/nrf9160-analog-input-pins/303576#303576




^ Debugging

2022

1027
• [] https://github.com/zephyrproject-rtos/zephyr/issues/41677#issuecomment-1011605859 . . . undefined reference to `__device_dts_ord_xx' #41677
1025
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/93239/debugging-out-of-tree-device-driver-in-nrf-connect
0620
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89101/debug-uart How to send Zephyr log messages to custom UART?
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/87240/nrf9160-using-uart-with-printf-without-all-the-debugging-outputs-from-zephyr




^ RTT Real Time Terminal Related

2022

0322
• https://devzone.nordicsemi.com/f/nordic-q-a/86100/not-able-to-use-nordic-proprietary-at-commands-on-nrf9160
• https://devzone.nordicsemi.com/f/nordic-q-a/76957/zephyr-read-in-keys-from-the-rtt-terminal




^ UARTs and Multiple UARTs

Question with dev board nRF5340DK regarding use of multiple UARTs and Bluetooth together:

• https://devzone.nordicsemi.com/f/nordic-q-a/103034/using-uart0-and-uart1-in-the-app-cpu-with-bt-enabled-on-the-nrf5340dk

2024-03-20 WED

Devzone member Mataer asks about run time baud rate changes:

• https://devzone.nordicsemi.com/f/nordic-q-a/109489/dynamically-change-devicetree-configuration-for-uart-in-firmware




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^ External Services

Zephyr Timing With Epoch

• https://devzone.nordicsemi.com/f/nordic-q-a/103032/zephyr-timing-with-epoch




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^ nRF LTE Modem and PSM Modes

Posts to Nordic Devzone relating to LTE modem Power Savings Mode:

0516 About three years ago Norway developers discover iBasis SIM cards force Active Time period to zero, effectively disabling PSM:

• https://devzone.nordicsemi.com/f/nordic-q-a/48641/psm-tau-and-at


How to interpret bit wise encodings of PSM parameters periodic-TAU, active time, periodic-TAU extended:

• https://devzone.nordicsemi.com/f/nordic-q-a/87451/role-of-active-time-in-psm-requests-granted-values

Others' posts:

2022

0426
• https://devzone.nordicsemi.com/f/nordic-q-a/87330/nrf9160-not-setting-requested-active-time
0418
• https://devzone.nordicsemi.com/f/nordic-q-a/86952/different-definitions-of-parameter-periodic-tau-in-at-instruction-cpsms-and-xmonitor
0412 TUE
• https://devzone.nordicsemi.com/f/nordic-q-a/86893/weirdest-thing-i-ve-ever-experienced-in-my-life

2021

1217 FRI
• https://devzone.nordicsemi.com/f/nordic-q-a/63439/nrf-cloud---two-client-certs-mqtt_evt_connack-result--111
2021-12-05 SUN
• https://devzone.nordicsemi.com/f/nordic-q-a/82416/thread-secure-dfu
2021-11-09 TUE Jared Wolff Community post: MQTT, MVNOs and minimal data use strategies and options for edge devices:
• https://community.jaredwolff.com/d/187-getting-started-nrf9160-a-bunch-of-questions/4
2021-10-23 SAT (SOLVED)
• https://devzone.nordicsemi.com/f/nordic-q-a/80988/thingy-91-agps-sample-tracks-satellites-but-does-not-get-fix Thingy91 sample tracks but does not fix on satellites




^ nRF9160 Modem Libraries

2022

0707
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89775/can-the-modem-library-back-end-be-directed-to-an-external-modem







^ AT commands

0408

• https://devzone.nordicsemi.com/f/nordic-q-a/86787/nrf9160-slm-documentation-seems-to-be-inconsistent
• https://devzone.nordicsemi.com/f/nordic-q-a/63267/getting-cereg-5-fffe-ffffffff-while-disconnected-from-the-network




^ MQTT Related

2022

0509

• https://devzone.nordicsemi.com/f/nordic-q-a/87728/mqtt-subscribe-and-unsolicited-messages ticket 87728 - MQTT subscribe and unsolicited messages
• https://devzone.nordicsemi.com/f/nordic-q-a/76415/merging-application-mqtt_simple-and-gps/315628#315628 ticket 76415 - merging application mqtt_simple and gps
2021-12-31 FRI
• https://devzone.nordicsemi.com/f/nordic-q-a/81617/cjson-mqtt_publish-on-nrf9160
2021-12-22 WED
• https://devzone.nordicsemi.com/f/nordic-q-a/83058/mqtt-client---calling-nrf_getaddrinfo-couse-reset

2021-12-17 FRI

• https://devzone.nordicsemi.com/f/nordic-q-a/56991/aws-fota-sample-and-psm

https://devzone.nordicsemi.com/f/nordic-q-a/69077/nrf9160-aws_iot-sample-mqtt-topic-add-does-not-work/288602#288602

zephyr-based/nrf$ grep -nr CONFIG_MQTT_CLEAN_SESSION ./*
./applications/asset_tracker_v2/prj.conf:106:CONFIG_MQTT_CLEAN_SESSION=y
./applications/asset_tracker/prj.conf:54:CONFIG_MQTT_CLEAN_SESSION=n
./applications/asset_tracker/src/main.c:1638:#if !IS_ENABLED(CONFIG_MQTT_CLEAN_SESSION)
./applications/asset_tracker/prj_qemu_x86.conf:28:CONFIG_MQTT_CLEAN_SESSION=n
./applications/asset_tracker/prj_thingy91_nrf9160ns.conf:58:CONFIG_MQTT_CLEAN_SESSION=n
./doc/nrf/releases/release-notes-1.4.0.rst:181:    * Replaced ``CONFIG_CLOUD_PERSISTENT_SESSIONS`` usage with Zephyr's :option:`CONFIG_MQTT_CLEAN_SESSION`.
./samples/nrf9160/mqtt_simple/prj.conf:28:CONFIG_MQTT_CLEAN_SESSION=y
./subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c:577:#if !defined(CONFIG_MQTT_CLEAN_SESSION)
./subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c:591:#if !defined(CONFIG_MQTT_CLEAN_SESSION)
./subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c:604:#if !defined(CONFIG_MQTT_CLEAN_SESSION) || defined(CONFIG_NRF_CLOUD_FOTA)
./subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c:610:#if !defined(CONFIG_MQTT_CLEAN_SESSION)
./subsys/net/lib/aws_iot/src/aws_iot.c:684:                                !IS_ENABLED(CONFIG_MQTT_CLEAN_SESSION) &&
./subsys/net/lib/aws_iot/src/aws_iot.c:690:                 IS_ENABLED(CONFIG_MQTT_CLEAN_SESSION)) {




^ FOTA Firmware Over The Air Updates

• https://devzone.nordicsemi.com/f/nordic-q-a/101606/device-becomes-un-updatable-forever-if-wrong-s0-s1-update-image-is-transferred-in-a-two-stage-bootloader-setup




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^ Zephyr starting function

• https://devzone.nordicsemi.com/f/nordic-q-a/59838/why-there-is-no-main-in-zephyr-thread-sample-codes

^ Zephyr and External Flash

• https://community.jaredwolff.com/d/262-external-flash-not-playing-nice-with-networking/5




^ Zephyr kernel issues

• https://devzone.nordicsemi.com/f/nordic-q-a/87830/k_work_submit-schedules-in-atomic-context




^ Battery Related Questions

2022

0601
To monitor a coin cell battery CR2032 and example schematic:
• https://devzone.nordicsemi.com/f/nordic-q-a/65417/nrf52840-coin-cell-battery-percentage-monitor


UICR and related issues:

2022

0621
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89195/uicr-write-example-with-nrf9160-and-zephyr




^ Zephyr DMA and EasyDMA

Zephyr DMA and EasyDMA . . .

• https://devzone.nordicsemi.com/f/nordic-q-a/90219/using-qspi-with-dma-on-nrf5340dk




^ DPPI Distributed Programmable Peripheral Interrupts

• https://devzone.nordicsemi.com/f/nordic-q-a/79179/simple-blinky-example-with-dppi-for-nrf9160

A reference to DPPI driver code:

• https://github.com/nrfconnect/sdk-nrf/blob/v1.6.1/subsys/esb/esb.c#L563




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^ Code Test Coverage and Coverage Reports

• https://devzone.nordicsemi.com/f/nordic-q-a/90166/enabling-coverage-reports-for-device-testing-with-nrf-connect-sdk




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^ Zephyr Project Configuration

Section started 2023-08-16.

• (open) https://devzone.nordicsemi.com/f/nordic-q-a/102918/nrf5340-zephyr-child-image-image-build-issue

Forum post on configuring CLion first time of use:

• https://stackoverflow.com/questions/33267305/how-do-i-set-up-clion-to-compile-and-run




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^ Toolchain Related

^ To Set cmake Options In SES

As of 2021-09-24, using Segger version xxx Nordic's version, this Segger IDE offers an extra menu item to open, build, flash and debug nRF SDK sample apps. The initial dialog box which appears for this option is titled "nRF Connect Options". Just left of the title there is a Nordic colored icon showing two links of chain, white on blue.

There are five input boxes, a mix of text inputs and drop down menus, and two sets of radio buttons. The free form text input box titled "Extra CMake Build Options" is a key place to express custom configuration settings to `cmake`. To use, for example, Zephyr's latest stable arm cross compiling toolchain in place of Nordic's close but not quite as recent chosen release of GNU ARM cross compiler toolchain, the following `cmake` option needs be entered here:

-DZEPHYR_TOOLCHAIN_VARIANT=zephyr

The default value for 'ZEPHYR_TOOLCHAIN_VARIANT' with Nordic's SDK v1.6.1 is 'gnuarmemb'. It is not sufficient to set a variable by this name in the shell environment of Linux systems, nor is it sufficient to set a Segger global or project macro by this name equal to the string "zephyr". This change in toolchain name or branding must be passed to `cmake` on its command line. In Segger, we build with a button press, so the command line option is only accessible to us from certain limited place or places. This text input box is our place to express needed custom command line options to `cmake` when working within SES.




^ create_nordic_project.py

ted@localhost:~/projects/zephyr-based/z4-sandbox-kionix-work/nrf/samples/nrf9160/at_client$ python3 /opt/ses-nordic/arm_segger_embedded_studio_v560_linux_x64_nordic/html/create_nordic_project.py
Usage: create_nordic_project.py [-h] [--cmake-executable cmakeExecutable] [--cmake-option cmakeOption]
                                [--python-executable pythonExecutable] [--ninja-executable ninjaExecutable]
                                [--dtc-executable dtcExecutable]
                                zephyrBaseDir toolchainDir studioDir buildDir boardDir boardName sourceDir

Arguments:
  zephyrBaseDir      Zephyr base directory
  toolchainDir       GCC toolchain directory
  studioDir          Embedded Studio directory
  buildDir           Build directory
  boardDir           Board directory
  boardName          Board name
  sourceDir          Source directory

Optional arguments:
  --help                                  Show this help message and exit
  --ncs-toolchain-version versionNCS Toolchain version to use
  --cmake-executable cmakeExecutable      CMake executable to use
  --cmake-option cmakeOption              Add additional CMake option
  --python-executable pythonExecutable    Python executable to use
  --ninja-executable ninjaExecutable      Ninja executable to use
  --dtc-executable dtcExecutable          DTC executable to use
  --cmake-rerunRerun CMake in build folder
ted@localhost:~/projects/zephyr-based/z4-sandbox-kionix-work/nrf/samples/nrf9160/at_client$




^ How to flash how to program

• [some answers] https://devzone.nordicsemi.com/f/nordic-q-a/51740/how-can-we-flash-the-original-factory-out-of-the-box-fw-for-the-nrf9160




^ Zephyr and Docker

2022

0629
• [open] https://devzone.nordicsemi.com/f/nordic-q-a/89477/project-cannot-be-built-in-a-docker-container




^ - - - - -   - - - - -   - - - - -   - - - - -   - - - - -   - - - - -   - - - - -   - - - - -   - - - - -   - - - - -  

^ Posts To Follow - not yet sorted

As a note here which will also be mentioned near the beginning of this NN wiki page, it is as of 2022-05-09 Monday possible to access any Nordic Devzone post by its number, by entering a URL of the form https://devzone.nordicsemi.com/f/nordic-q-a/nnnnn/index.asp. This works for posts all the way down to Nordic Devzone's first post, post number 1, which was posted cerca 2013.

The following posts cover interesting and in many cases likely useful topics relating to low power, edge sensing devices. These posts however are not yet sorted by NN wiki users. They are here for further review, possibly on a rainy day, but in either case to fulfill future technical needs:

2023

0418
• https://devzone.nordicsemi.com/f/nordic-q-a/98868/ncs-mcuboot-and-nvs
• https://devzone.nordicsemi.com/f/nordic-q-a/98871/arduino_header-usage
0412
• https://devzone.nordicsemi.com/f/nordic-q-a/98672/twim-drivers-don-t-work-with-power-management-runtime-enabled
0322
• https://devzone.nordicsemi.com/f/nordic-q-a/98006/how-to-create-a-custom-yaml-file
0221
• https://devzone.nordicsemi.com/f/nordic-q-a/96915/force-network-re-registration

2022

1002 Monday
• https://devzone.nordicsemi.com/f/nordic-q-a/92559/zephyr-custom-driver-out-of-tree-i2c
0927 Tuesday
• https://devzone.nordicsemi.com/f/nordic-q-a/92383/spi-interface-for-microsd-card
0715 Friday post to Nordic Devzone regarding micro ecc . . .
• [open]  https://devzone.nordicsemi.com/f/nordic-q-a/90050/prebuilt-micro-ecc-library
0706
• [open]  https://devzone.nordicsemi.com/f/nordic-q-a/89725/watchdog-timer-issues-and-pullup-on-nreset . . . nRF9160 watchdog timer issue and 10k pull up on reset line.
0630
• [reply]  https://devzone.nordicsemi.com/f/nordic-q-a/89523/does-mdk-8-15-0-include-workaround-for-errata-136
0614
• [replies]  https://devzone.nordicsemi.com/f/nordic-q-a/88970/nrf9160-help-needed-to-find-reset-reboot-cause . . . Thingy91, ncs 1.6.1 adds Memfault module for RAM based logging facility
0607
• [open]  https://devzone.nordicsemi.com/f/nordic-q-a/88696/high-drive High current drive question for infra-red LEDs
0520
• [open]  https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/nw_service/cpsms_set.html


0509

• https://devzone.nordicsemi.com/f/nordic-q-a/100/how-to-determine-nrf51822-laser-mark ". . . mark answer as accepted to make clearer for other users . . ."
• https://devzone.nordicsemi.com/f/nordic-q-a/20181/nrf52-throughput-demo-blog-post nRF52xx data throughput

0329

• https://devzone.nordicsemi.com/f/nordic-q-a/86381/communication-between-nrf52-and-nrf91-on-the-nrf91dk

0315

• https://devzone.nordicsemi.com/f/nordic-q-a/85861/twis-stops-working-during-long-k_msleep


2021-12-13 Monday ( OPEN )


• https://devzone.nordicsemi.com/f/nordic-q-a/82734/softdevice-on-custom-board


2021-11-30 ( OPEN )


• https://devzone.nordicsemi.com/f/nordic-q-a/82254/data-queues-crashing-zephyr-code

2021-11-22

• https://devzone.nordicsemi.com/f/nordic-q-a/81986/littlefs-on-large-qspi-nor
• https://github.com/zephyrproject-rtos/zephyr/issues/40453

2021-11-19

• https://devzone.nordicsemi.com/f/nordic-q-a/79660/kconfig-and-prj-conf-question

2021-11-18

• https://devzone.nordicsemi.com/f/nordic-q-a/81872/flash-memory-error-fds_err_no_pages

2021-11-11

• https://devzone.nordicsemi.com/f/nordic-q-a/81646/can-i-use-ring-buffer-from-zephyr-in-uart-event-handler

Something of an answer to the first and newer post, explanation of nRF ring buffer and queue libraries:

• https://devzone.nordicsemi.com/f/nordic-q-a/50834/how-to-use-the-ring-buffer-library
• https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.3.0%2Flib_queue.html
• https://devzone.nordicsemi.com/f/nordic-q-a/81642/custom-802-15-4-implementation-using-ncs

2021-11-09

• https://devzone.nordicsemi.com/f/nordic-q-a/81562/linkmargin-availibility


2021-11-04

• https://devzone.nordicsemi.com/f/nordic-q-a/51656/how-to-include-math-cmsis-dsp-library-in-nrf9160

Excerpt `./modules/hal/cmsis/CMSIS/DSP/Include/arm_math.h:3330:arm_status arm_rfft_fast_init_f32 (`


2021-11-03

• https://devzone.nordicsemi.com/f/nordic-q-a/81349/fota-issue-when-moving-from-different-ncs-versions


How to import non-Segger projects into Segger:

• https://devzone.nordicsemi.com/f/nordic-q-a/42215/how-to-import-gcc-arm-project-to-segger-studio/164352#164352
• https://devzone.nordicsemi.com/f/nordic-q-a/42082/nordic-nrf5-sdk-15-2-0-example-include-files-in-eclipse/163538#163538

TO DO : follow steps outlined in this post:

Post by Erez, bringing in existing nRF SDK project to Segger:

• https://devzone.nordicsemi.com/f/nordic-q-a/77344/import-ncs-existing-zephyr-project-not-sample-to-ses
• https://devzone.nordicsemi.com/f/nordic-q-a/28196/graduating-from-example-to-production-project-file-structure


Two I2C, SPI and ADC APIs available in nRF9160 based projects:

• https://devzone.nordicsemi.com/f/nordic-q-a/59272/nrf9160-adc-spi-and-i2c-example-codes-spi-and-i2c-api


Recent post regarding how to add driver to a minimal Zephyr project (not yet answered as of 2021-09-26):

• https://devzone.nordicsemi.com/f/nordic-q-a/80032/how-to-add-a-driver-to-the-minimal-zephyr-sample-project-for-the-nrf52-dk


Posts which mentions 'offsets.c.obj does not exist' error:

• https://devzone.nordicsemi.com/f/nordic-q-a/44158/receiving-error-no-such-file-for-offsets-c-obj-when-building-solution
• https://devzone.nordicsemi.com/f/nordic-q-a/52180/segger-embedded-studio-error-offsets-c-obj

Board overlay file base names must match board called out in `west build ...` invocation:

• https://devzone.nordicsemi.com/f/nordic-q-a/66731/devicetree-macro-define-dt_nodelabel-label-dt_cat-dt_n_nodelabel_-label

Electrical and hardware related:

• https://devzone.nordicsemi.com/f/nordic-q-a/80329/nrf9160-vdd1-vdd2-difference-between-revision-b0-and-b1


Sprintf C formatting:

• https://devzone.nordicsemi.com/f/nordic-q-a/79829/sprintf-format-issue/331167


How to integrate Zephyr drivers into custom Zephyr app:

• https://devzone.nordicsemi.com/f/nordic-q-a/80747/adding-in-drivers-into-zephyr




^ Posts to Follow - Offered help

2022 . . .

0601
• https://devzone.nordicsemi.com/f/nordic-q-a/88510/system-off-power-consumption-is-high
Not able to find 'NARODIC' in searches, but here are some nRF5 SDK references at Nordic Semi site: (1) https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.3.0%2Findex.html (2) https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/pwr_mgmt_example.html (3) https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_pwr_mgmt.html

0512

• https://devzone.nordicsemi.com/f/nordic-q-a/87883/first-i2c-code-on-nrf-connect-i-think-i-m-close
• ...

0510

• https://devzone.nordicsemi.com/f/nordic-q-a/87784/adding-to-the-device-tree-with-overlays---zephyr Developer SmallerPond "adding to the device tree with overlays" question

0415

• https://devzone.nordicsemi.com/f/nordic-q-a/86996/on-setting-up-linux-vs-code-showing-error-in-running-command-make-gcc-gcc-multilib-g--multilib-libsdl2-dev

0311

• https://devzone.nordicsemi.com/f/nordic-q-a/85636/can-i-run-python-scripts-on-the-nrf52840-dk




^ Posts Underway

2022-03-02 Wed

Hello CircuitDojo Community,

In a [recent post](https://community.jaredwolff.com/d/222-nrf9160-sleep-and-low-power-control-areas/2) I inquired about low power configurations for the nRF9160 and boards based on this SiP. Jared Wolff shared code which dynamically turns off a given UART of the SiP's application processor. In his code there's a call to a routine named `uart_rx_disable().` I'd initially overlooked this. Today as I try to build my application I'm blocked on a link time error "undefined reference to `'".

Per Jared's code excerpt I have added `CONFIG_PM_DEVICE=y` to my prj.conf. My project is based on Nordic's aws_iot sample app. I am using the ncs SDK version 1.6.1. Nordic's fork of Zephyr in this SDK is Zephyr release 2.6.0.

Where should `uart_rx_disable()` be defined? Am I using a too old version of ncs or Zephyr RTOS?




^ Posts To Close

Must request Nordic Devzone engineers to close following tickets, issues answered:

• [ ] https://devzone.nordicsemi.com/f/nordic-q-a/83753/custom-board-i2c-device_is_ready-failing-with-init_res-5