[OpenOCD-user] Issues with Atmel/Microchip Xplained Boards

[Perry N. <mai...@pe...>]

Hello!

I am having issues reliably communicating with the mEDBG interface on my SAMD10 Xplained Mini board.

I was using it fine for a while with some simple programs (flashing and GDB), but after adding a lot more components to my program, I find that I must erase the board in Microchip/Atmel Studio before OpenOCD with communicate with it again. Studio seems to have no problem talking to it. The components I added were a second UART, EIC, and CRC but it seems more likely that the larger program size in general caused the issue. I double checked that the onboard debugger has the latest firmware.

Here is my openocd.conf:

    #
    # Atmel SAMD10 Xplained mini evaluation kit.
    # http://www.atmel.com/tools/atsamd10-xmini.aspx

    telnet_port 4444
    gdb_port 3333

    source [find interface/cmsis-dap.cfg]

    # chip name
    set CHIPNAME at91samd10d14

    source [find target/at91samdXX.cfg]

And here is the debug output from attempting to connect:

    Info : 211 75 cmsis_dap_usb.c:760 cmsis_dap_get_caps_info(): CMSIS-DAP: SWD  Supported
    Info : 212 75 cmsis_dap_usb.c:762 cmsis_dap_get_caps_info(): CMSIS-DAP: JTAG Supported
    Info : 213 83 cmsis_dap_usb.c:853 cmsis_dap_swd_open(): CMSIS-DAP: Interface Initialised (SWD)
    Info : 214 91 cmsis_dap_usb.c:740 cmsis_dap_get_version_info(): CMSIS-DAP: FW Version =
    Debug: 215 99 cmsis_dap_usb.c:925 cmsis_dap_init(): CMSIS-DAP: Packet Size = 64
    Debug: 216 107 cmsis_dap_usb.c:936 cmsis_dap_init(): CMSIS-DAP: Packet Count = 1
    Info : 217 115 cmsis_dap_usb.c:781 cmsis_dap_get_status(): SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 0 TDO = 0 nTRST = 0 nRESET = 1
    Info : 218 155 cmsis_dap_usb.c:979 cmsis_dap_init(): CMSIS-DAP: Interface ready
    Debug: 219 155 core.c:1598 adapter_khz_to_speed(): convert khz to interface specific speed value
    Debug: 220 155 core.c:1601 adapter_khz_to_speed(): have interface set up
    Debug: 221 163 core.c:1598 adapter_khz_to_speed(): convert khz to interface specific speed value
    Debug: 222 163 core.c:1601 adapter_khz_to_speed(): have interface set up
    Info : 223 163 core.c:1386 adapter_init(): clock speed 400 kHz
    Debug: 224 163 openocd.c:140 handle_init_command(): Debug Adapter init complete
    Debug: 225 163 command.c:143 script_debug(): command - ocd_command ocd_command type ocd_transport init
    Debug: 226 163 command.c:143 script_debug(): command - ocd_transport ocd_transport init
    Debug: 228 163 transport.c:239 handle_transport_init(): handle_transport_init
    Debug: 229 179 cmsis_dap_usb.c:810 cmsis_dap_swd_switch_seq(): JTAG-to-SWD
    Debug: 230 193 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing 2 queued transactions
    Debug: 231 193 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP read reg 0 0
    Debug: 232 193 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP write reg 0 1e
    Debug: 233 205 cmsis_dap_usb.c:660 cmsis_dap_swd_run_queue(): SWD ack not OK: 0 JUNK
    Debug: 234 205 command.c:626 run_command(): Command failed with error code -4
    User : 235 205 command.c:687 command_run_line(): in procedure 'init'
    in procedure 'ocd_bouncer'
    Debug: 236 205 command.c:626 run_command(): Command failed with error code -4
    User : 237 205 command.c:687 command_run_line():

A previous user here had the same problem with the SAM4E Xplained Pro: https://sourceforge.net/p/openocd/mailman/openocd-user/thread/CALzF3cbm8zgKUnZyhPrT5qakC3qAFgvfUMYMWSKQdmZEkpEJvQ%40mail.gmail.com/#msg35716779

Any ideas?

Thanks!
Perry