Hello, I encounter an issue when playing with OpenOCD and an Atmel ICE probe. Any hint to resolve this ?
Description OpenOCD fails to launch with an Atmel ICE probe and custom board equipped with a SAMD51G18. Flash, erase and debug session can be launched when using MPLABX or ATMEL STUDIO with the Atmel probe. I am able to launch debug session with gdb and OpenOCD when using an STM32F4-Disco (STM32F407 and Stlink). I have tried to reduce speed of the adapter from its initial 2000 kHz to 500kHz/50kHz/20kHz and even 2kHz. Steps to Reproduce openocd -d3 -f myboard_samd51.cfg Content of "myboard_samd51.cfg": source [find interface/cmsis-dap.cfg] transport select swd cmsis_dap_vid_pid 0x03eb 0x2141 set CHIPNAME samd51g18a source [find target/atsame5x.cfg] reset_config srst_only Expected behaviour: I expect to be able to launch a command line gdb (arm-none-eabi) session using "target extended-remote localhost:3333" Actual behaviour: I end up with following extracted message from OpenOCD when using debug level 3: Debug: 214 506 cmsis_dap_usb.c:730 cmsis_dap_swd_read_process(): SWD ack not OK @ 0 JUNK Debug: 215 511 command.c:626 run_command(): Command 'dap init' failed with error code -4 User : 216 513 command.c:692 command_run_line(): Debug: 217 515 command.c:626 run_command(): Command 'init' failed with error code -4 User : 218 517 command.c:692 command_run_line(): Debug: 219 519 target.c:1978 target_free_all_working_areas_restore(): freeing all working areas Debug: 220 523 cmsis_dap_usb.c:932 cmsis_dap_swd_switch_seq(): SWD-to-JTAG Versions - OpenOCD version: 0.10.0-14 - operating system: Windows 10
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