Thanks @maxgerhardt you the champ. I can build the arduino examples that include bluefruit library now and I can flash onto the nRF52840 dk via the j-link usb.
However, the application is not running and I can’t detect it on BLE tools, either the nRF connect app or the Bluefruit connect app. I’m running this “custom_HRM” example.
This is the successful log from building and flashing.
> Executing task in folder nrf_adafruit_feather_dev: C:\Users\Tranks\.platformio\penv\Scripts\platformio.exe run --target upload --environment nrf52840_dk_adafruit <
Processing nrf52840_dk_adafruit (platform: nordicnrf52; board: nrf52840_dk_adafruit; framework: arduino)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/nordicnrf52/nrf52840_dk_adafruit.html
PLATFORM: Nordic nRF52 (9.2.0) > Nordic nRF52840-DK (Adafruit BSP)
HARDWARE: NRF52840 64MHz, 243KB RAM, 796KB Flash
DEBUG: Current (jlink) On-board (jlink) External (blackmagic, cmsis-dap, stlink)
PACKAGES:
- framework-arduinoadafruitnrf52 1.10200.0 (1.2.0)
- framework-cmsis 2.50700.210515 (5.7.0)
- tool-adafruit-nrfutil 1.503.0 (5.3)
- tool-bossac-nordicnrf52 1.10901.201022 (1.9.1)
- tool-jlink 1.75001.0 (7.50.1)
- tool-openocd 2.1100.211028 (11.0)
- tool-sreccat 1.164.0 (1.64)
- toolchain-gccarmnoneeabi 1.70201.0 (7.2.1)
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 13 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <Adafruit Bluefruit nRF52 Libraries>
| |-- <Adafruit nRFCrypto>
| | |-- <Adafruit TinyUSB Library>
| |-- <Adafruit TinyUSB Library>
| |-- <Adafruit Little File System Libraries> 0.11.0
| | |-- <Adafruit TinyUSB Library>
| |-- <Adafruit Internal File System on Bluefruit nRF52> 0.11.0
| | |-- <Adafruit Little File System Libraries> 0.11.0
| | | |-- <Adafruit TinyUSB Library>
Building in release mode
Checking size .pio\build\nrf52840_dk_adafruit\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [= ] 5.7% (used 14156 bytes from 248832 bytes)
Flash: [= ] 14.5% (used 117904 bytes from 815104 bytes)
Configuring upload protocol...
AVAILABLE: blackmagic, cmsis-dap, jlink, nrfjprog, stlink
CURRENT: upload_protocol = jlink
Uploading .pio\build\nrf52840_dk_adafruit\firmware_signature.bin
SEGGER J-Link Commander V7.50a (Compiled Jul 8 2021 18:18:11)
DLL version V7.50a, compiled Jul 8 2021 18:16:52
J-Link Command File read successfully.
Processing script file...
J-Link connection not established yet but required for command.
Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-nRF5340-NordicSemi compiled Jul 2 2021 10:55:25
Hardware version: V1.00
S/N: 1050239339
VTref=3.300V
Target connection not established yet but required for command.
Device "NRF52840_XXAA" selected.
Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
Cortex-M4 identified.
PC = FFFFFFFE, CycleCnt = 00000008
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000
SP(R13)= FFFFFFD8, MSP= FFFFFFD8, PSP= 00000000, R14(LR) = FFFFFFF9
XPSR = 01000003: APSR = nzcvq, EPSR = 01000000, IPSR = 003 (HardFault)
CFBP = 00000000, CONTROL = 00, FAULTMASK = 00, BASEPRI = 00, PRIMASK = 00
FPS0 = 00000000, FPS1 = 00000000, FPS2 = 00000000, FPS3 = 00000000
FPS4 = 00000000, FPS5 = 00000000, FPS6 = 00000000, FPS7 = 00000000
FPS8 = 00000000, FPS9 = 00000000, FPS10= 00000000, FPS11= 00000000
FPS12= 00000000, FPS13= 00000000, FPS14= 00000000, FPS15= 00000000
FPS16= 00000000, FPS17= 00000000, FPS18= 00000000, FPS19= 00000000
FPS20= 00000000, FPS21= 00000000, FPS22= 00000000, FPS23= 00000000
FPS24= 00000000, FPS25= 00000000, FPS26= 00000000, FPS27= 00000000
FPS28= 00000000, FPS29= 00000000, FPS30= 00000000, FPS31= 00000000
FPSCR= 00000000
Downloading file [.pio\build\nrf52840_dk_adafruit\firmware.bin]...
Comparing flash [100%] Done.
Erasing flash [100%] Done.
Programming flash [100%] Done.
J-Link: Flash download: Bank 0 @ 0x00000000: 1 range affected (118784 bytes)
J-Link: Flash download: Total: 3.725s (Prepare: 0.071s, Compare: 0.012s, Erase: 2.322s, Program & Verify: 1.276s, Restore: 0.042s)
J-Link: Flash download: Program & Verify speed: 91 KiB/s
O.K.
Downloading file [.pio\build\nrf52840_dk_adafruit\firmware_signature.bin]...
Comparing flash [100%] Done.
Erasing flash [100%] Done.
Programming flash [100%] Done.
J-Link: Flash download: Bank 0 @ 0x00000000: 1 range affected (4096 bytes)
J-Link: Flash download: Total: 0.165s (Prepare: 0.046s, Compare: 0.002s, Erase: 0.083s, Program & Verify: 0.010s, Restore: 0.022s)
J-Link: Flash download: Program & Verify speed: 399 KiB/s
O.K.
Reset delay: 0 ms
Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Script processing completed.
========================================================================= [SUCCESS] Took 8.20 seconds =========================================================================
Terminal will be reused by tasks, press any key to close it.