Hi all,
I'm starting a project with a nRF52840, and start protoyping with pca10056 board.
I started with compiling ble_app_blinky example app, with armgcc.
I can compile it, and flash it using make flash directive, without issue.
App is running fine, I can connect to device with nrfconnect on an Android phone.
But I can manage to get RTT LOG work.
On Linux computer, I connect to target with:
$ JLinkExe -device NRF52 -if SWD -speed 4000 -autoconnect 1
SEGGER J-Link Commander V6.80c (Compiled Jun 19 2020 17:23:41)
DLL version V6.80c, compiled Jun 19 2020 17:23:30
Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00
Hardware version: V1.00
S/N: 683008226
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
VTref=3.300V
Device "NRF52" 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.
J-Link>
Everything seems ok.
At this moment, app is runinng and LED5 is ON.
On another terminal, I launch:
$ JLinkRTTClient
###RTT Client: ************************************************************
###RTT Client: * SEGGER Microcontroller GmbH *
###RTT Client: * Solutions for real time microcontroller applications *
###RTT Client: ************************************************************
###RTT Client: * *
###RTT Client: * (c) 2012 - 2016 SEGGER Microcontroller GmbH *
###RTT Client: * *
###RTT Client: * www.segger.com Support: [email protected] *
###RTT Client: * *
###RTT Client: ************************************************************
###RTT Client: * *
###RTT Client: * SEGGER J-Link RTT Client Compiled Jun 19 2020 17:23:54 *
###RTT Client: * *
###RTT Client: ************************************************************
###RTT Client: -----------------------------------------------
###RTT Client: Connecting to J-Link RTT Server via localhost:19021 ...
###RTT Client: Connected.
SEGGER J-Link V6.80c - Real time terminal output
J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00 V1.0, SN=683008226
Process: JLinkExe
At this moment, LED5 blinks very fast, and app is still running (LED1 and LED2 change state when I am connected or not).
But there is no NRF_LOG_INFO message on rttclient, and LED5 is blinking fast. Is it normal?
I tried to change usb cable without any effect.
Thanks for your help.
Vincent
