I have a new Freescale FRDM-K22F board. I'm unable to load any programs onto it.
When I attempt to load the program I get the following error message from JLinkGDBServer: ERROR: Failed to prepare for programming
Here's my working environment:
Host OS: Mac OS X 10.11.5 El Capitan
Toolchain: GNU ARM (gcc-arm-none-eabi-4_8-2014q3)
Firmware: SEGGER OpenSDA 2.1 generic firmware from https://www.segger.com/downloads/jlink/OpenSDA_V2_1.bin
JLink: V5.12i Command Line Version from https://www.segger.com/downloads/jlink/JLink_MacOSX_V512i.pkg
Here's what happens when I attempt to load the hello_world example:
1. Start JLinkGDBServer from Terminal
./JLinkGDBServer -select USB -device MK22FN512xxx12 -if SWD -speed 1000
SEGGER J-Link GDB Server V5.12i Command Line Version
JLinkARM.dll V5.12i (DLL compiled Jul 5 2016 19:02:37)
-----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: MK22FN512xxx12
Target interface: SWD
Target interface speed: 1000kHz
Target endian: little
Connecting to J-Link...
J-Link is connected.
Firmware: J-Link OpenSDA 2 compiled Jul 12 2016 12:33:05
Checking target voltage...
Target voltage: 3.30 V
Listening on TCP/IP port 2331
Connecting to target...Connected to target
Waiting for GDB connection...
2. Run GDB and load hello_world
(gdb) target remote localhost:2331
Reading all registers
WARNING: Failed to read memory @ address 0xFFFFFFFE
Downloading 1024 bytes @ address 0x00000000
Downloading 16 bytes @ address 0x00000400
Downloading 16096 bytes @ address 0x00000410
Downloading 4080 bytes @ address 0x000042F0
Downloading 8 bytes @ address 0x000052E0
Downloading 4 bytes @ address 0x000052E8
Downloading 4 bytes @ address 0x000052EC
Downloading 164 bytes @ address 0x000052F0
ERROR: Failed to prepare for programming.
Failed to execute RAMCode for RAM check!
Writing register (PC = 0x000004d8)
I have tried various other firmwares and the beta version of JLink, as well as various combinations of `monitor halt` and `monitor reset` but I am still unable to load any programs onto the K22F board. Can anyone help?