Hi all,
I recently received two XIAO MG24 Sense boards and have been trying to get started with them using the Arduino IDE on macOS (M1, version 15.3.2). I followed the getting started guide from the XIAO MG24 wiki:
Sketch uses 846140 bytes (53%) of program storage space. Maximum is 1572864 bytes.
Global variables use 176504 bytes (67%) of dynamic memory, leaving 85640 bytes for local variables. Maximum is 262144 bytes.
Open On-Chip Debugger 0.12.0+dev-01514-g21fa2de70 (2024-02-07-19:03)
Licensed under GNU GPL v2
debug_level: 0
efm32s2_dci_read_se_status
[efm32s2.cpu] halted due to debug-request, current mode: Thread
xPSR: 0xf9000000 pc: 0xfffffffe msp: 0xfffffffc
** Programming Started **
** Programming Finished **
Error: [efm32s2.cpu] clearing lockup after double fault
Based on some forum and wiki reading, it appears that the board may be in a “bricked” state. I attempted to follow the unbricking procedure as outlined on the wiki (xiao_mg24_erase.sh), but it did not seem to succeed either. Here’s the output:
./xiao_mg24_erase.sh
Open On-Chip Debugger 0.12.0+dev-01514-g21fa2de70 (2024-02-07-19:03)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 2
Info : auto-selecting first available session transport "swd". To override use 'transport select <transport>'.
efm32s2_dci_read_se_status
Info : Using CMSIS-DAPv2 interface with VID:PID=0x2886:0x0062, serial=C23A05B2
Info : CMSIS-DAP: SWD supported
Info : CMSIS-DAP: FW Version = 2.0.0
Info : CMSIS-DAP: Serial# = C23A05B2
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 0 TDO = 0 nTRST = 0 nRESET = 0
Info : CMSIS-DAP: Interface ready
Info : clock speed 1000 kHz
Info : SWD DPIDR 0x6ba02477
Info : [efm32s2.cpu] Cortex-M33 r0p4 processor detected
Info : [efm32s2.cpu] target has 8 breakpoints, 4 watchpoints
Info : [efm32s2.cpu] Examination succeed
Info : starting gdb server for efm32s2.cpu on 3333
Info : Listening on port 3333 for gdb connections
[efm32s2.cpu] halted due to debug-request, current mode: Thread
xPSR: 0xf9000000 pc: 0xfffffffe msp: 0xfffffffc
Info : detected part: MG24B220, rev 16
Info : flash size = 1536 KiB
Info : flash page size = 8192 B
Info : detected part: MG24B220, rev 16
Info : flash size = 1536 KiB
Info : flash page size = 8192 B
Error: No flash at address 0x08180000
It appears to connect and detect the chip correctly, but then fails to erase or reset the flash.
Has anyone encountered something similar? Is there a workaround or alternative method to recover the board? Or is this a hardware issue?
Thanks in advance for any help or ideas!
Cheers,
Matt