hello
I used samd21g18a board.
fter downloading the bootloader with the debugger, I want to download it to USB without a debugger.
tool-> board -> Arduino Zero(Native USB port)
programmer -> Atmel SAM-ICE
burn to bootloader
as below message.
Open On-Chip Debugger 0.10.0+dev-gf0767a31 (2018-06-11-13:36)
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 '.
none separate
adapter speed: 400 kHz
cortex_m reset_config sysresetreq
Info : CMSIS-DAP: SWD Supported
Info : CMSIS-DAP: JTAG Supported
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : CMSIS-DAP: FW Version = 1.0
Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 1 TDO = 1 nTRST = 0 nRESET = 1
Info : CMSIS-DAP: Interface ready
Info : clock speed 400 kHz
Info : SWD DPIDR 0x0bc11477
Info : at91samd21g18.cpu: hardware has 4 breakpoints, 2 watchpoints
Error: at91samd21g18.cpu -- clearing lockup after double fault
Polling target at91samd21g18.cpu failed, trying to reexamine
Info : at91samd21g18.cpu: hardware has 4 breakpoints, 2 watchpoints
Info : Listening on port 3333 for gdb connections
target halted due to debug-request, current mode: Thread
xPSR: 0x21000000 pc: 0x0000064c msp: 0x20007ffc
** Programming Started **
auto erase enabled
Info : SAMD MCU: SAMD21G18A (256KB Flash, 32KB RAM)
wrote 7424 bytes from file C:\Users\HAHA\AppData\Local\Arduino15\packages\arduino\hardware\samd\1.8.6/bootloaders/zero/samd21_sam_ba.bin in 0.654268s (11.081 KiB/s)
** Programming Finished **
** Verify Started **
Disconnected the debugger and connected the USB connector.
USB recognition failed.
Please advice.