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04-14-2017 04:44 AM
I tried to flash EFR32MG12P Starter Kit dev board with the on-board integrated SEGGER JLink. However, it seems not work now and the connection to JLink always fails.
I checked the SEGGER JLink supported device name list from here, for EFR32MG12P, it should be "EFR32MG12PxxxF1024". However, when I try to connect to the JLink, it seems not work using that setting file, the detailed info as below. But the "EFR32MG1PxxxF256" allows to connect to JLink.
$ sudo ./JLinkGDBServer -if swd -device EFR32MG12PxxxF1024
SEGGER J-Link GDB Server V5.10j Command Line Version
JLinkARM.dll V5.10j (DLL compiled Feb 2 2016 19:32:23)
-----GDB Server start settings-----
GDBInit file: none
GDB Server Listening port: 2331
SWO raw output listening port: 2332
Terminal I/O port: 2333
Accept remote connection: yes
Generate logfile: off
Verify download: off
Init regs on start: off
Silent mode: off
Single run mode: off
Target connection timeout: 0 ms
------J-Link related settings------
J-Link Host interface: USB
J-Link script: none
J-Link settings file: none
------Target related settings------
Target device: EFR32MG12PxxxF1024
Target interface: SWD
Target interface speed: 1000kHz
Target endian: little
Connecting to J-Link...
J-Link is connected.
Failed to set device (EFR32MG12PxxxF1024). Unknown device selected?ERROR : Failed to set device.
Firmware: Silicon Labs J-Link Pro OB compiled Feb 8 2017 12:16:49
Checking target voltage...
Target voltage: 3.36 V
Listening on TCP/IP port 2331
Connecting to target...ERROR: No CPU core or target device has been selected. Please make sure at least the core J-Link shall connect to, is selected.
ERROR: Could not connect to target.
Target connection failed. GDBServer will be closed...Restoring target state and closing J-Link connection...
Could not connect to target.
I also attach a screenshot about the configuration page when I connected the EFR32MG12P dev boards to Simplicity Studio.
Please help have a check and correct me if i'm using the wrong device name.
Solved! Go to Solution.
04-15-2017 04:11 AM
You are using an old version of the SEGGER JLink tools.
The current version is 6.14c. Please upgrade.
We upgrade the JLinkARM.dll included with Simplicity Studio from release to release, which is why your Studio screenshot shows proper identification of the device as EFR32MG12. It includes a more recent version of JLinkARM.dll than the one you are trying to use with the GDB Server in the SEGGER package.