I am using a custom board, based on the FRDM-KL02Z but with an MKL02Z16xxx instead of an MKL02Z32xxx. For programming and debugging, I am using a J-link which is is both cases directly connected to the target CPU via Vcc, GND, SWD and SWCLK (no reset). Compiler is a Keil.
On the FRDM, everything works fine, I can program and debug the target CPU.
For the custom board, I had to change settings in the programmer but they are all now set for a see a MKL02Z32xxx.
However, I see a strange behavior: Using the IDE, I always get the message that the CPU can't be reset.
On the other hand, if I reset and erase the CPU via the J-link commander, everything seems to be ok (but still fails sometimes).
Any idea?
================================= IDE MESSAGE===================
------------
DLL: V5.12e, compiled Apr 29 2016 15:03:58
Firmware: J-Link V9 compiled Mar 29 2016 18:46:37
Hardware: V9.30
S/N : 269304598
OEM : SEGGER-EDU
Feature(s) : FlashBP, GDB
* JLink Info: Found SWD-DP with ID 0x0BC11477
* JLink Info: Found SWD-DP with ID 0x0BC11477
* JLink Info: Found Cortex-M0 r0p0, Little endian.
* JLink Info: FPUnit: 2 code (BP) slots and 0 literal slots
* JLink Info: CoreSight components:
* JLink Info: ROMTbl 0 @ F0002000
* JLink Info: ROMTbl 0 [0]: FFFFE000, CID: B105900D, PID: 000BB932 MTB-M0+
* JLink Info: ROMTbl 0 [1]: FFFFF000, CID: B105900D, PID: 0008E000 MTBDWT
* JLink Info: ROMTbl 0 [2]: F00FD000, CID: B105100D, PID: 000BB4C0 ROM Table
* JLink Info: ROMTbl 1 @ E00FF000
* JLink Info: ROMTbl 1 [0]: FFF0F000, CID: B105E00D, PID: 000BB008 SCS
* JLink Info: ROMTbl 1 [1]: FFF02000, CID: B105E00D, PID: 000BB00A DWT
* JLink Info: ROMTbl 1 [2]: FFF03000, CID: B105E00D, PID: 000BB00B FPB
ROMTableAddr = 0xF0002000
* JLink Info: SYSRESETREQ has confused core. Trying to reconnect and use VECTRESET.
* JLink Info: Found SWD-DP with ID 0x0BC11477
**JLink Warning: Failed to reset CPU. VECTRESET has confused core.
**JLink Warning: CPU did not halt after reset.
**JLink Warning: CPU could not be halted
* JLink Info: Core did not halt after reset, trying to disable WDT.
**JLink Warning: CPU did not halt after reset.
**JLink Warning: CPU could not be halted
**JLink Warning: Could not set S_RESET_ST
* JLink Info: Found SWD-DP with ID 0x0BC11477
* JLink Info: SYSRESETREQ has confused core. Trying to reconnect and use VECTRESET.
* JLink Info: Found SWD-DP with ID 0x0BC11477
**JLink Warning: Failed to reset CPU. VECTRESET has confused core.
**JLink Warning: CPU did not halt after reset.
**JLink Warning: CPU could not be halted
* JLink Info: Core did not halt after reset, trying to disable WDT.
**JLink Warning: CPU did not halt after reset.
**JLink Warning: CPU could not be halted
**JLink Warning: Could not set S_RESET_ST
***JLink Error: DAP error while reading AIRCR / CPUID register
**JLink Warning: CPU could not be halted
Target info:
------------
Device: MKL02Z16xxx4
VTarget = 3.029V
State of Pins:
TCK: 0, TDI: 0, TDO: 0, TMS: 1, TRES: 1, TRST: 0
Hardware-Breakpoints: 0
Software-Breakpoints: 8192
Watchpoints: 0
JTAG speed: 500 kHz
Full Chip Erase Failed!
Flash Erase finished 12:35:03
