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pyocd / pyOCD

Open source Python library for programming and debugging Arm Cortex-M microcontrollers
https://pyocd.io
Apache License 2.0
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Transfer Fault programming LPC55S69 flash #760

Open Quincy-Zh opened 4 years ago

Quincy-Zh commented 4 years ago

Probe: LPC-LINK2 CMSIS-DAP PyOCD Version: 0.22.0 Target: LPC55s69

When start gdb-server, pyocd reported error. I killed process and start again, it would be OK. I can reproduce the problem by steps: start -> Error occurred -> Restart -> OK -> Restart -> Error occurred -> Restart -> OK ...

I use other CMSIS-DAP probe, the problem occurred too.

Log:

C:\Python27\Scripts\pyocd gdb -t lpc55s69 -f 40000000 --persist
0000437:WARNING:common:STLink and CMSIS-DAPv2 probes are not supported because no libusb library was found.
0004373:INFO:board:Target type is lpc55s69
0004404:INFO:dap:DP IDR = 0x6ba02477 (v2 rev6)
0004419:INFO:ap:AP#0 IDR = 0x84770001 (AHB-AP var0 rev8)
0004451:INFO:ap:AP#1 IDR = 0x84770001 (AHB-AP var0 rev8)
0004467:INFO:ap:AP#2 IDR = 0x002a0000 (proprietary)
0004467:INFO:rom_table:AP#0 ROM table #0 @ 0xe00fe000 (designer=015 part=000)
0004483:INFO:rom_table:[0]<e00ff000:ROM class=1 designer=43b part=4c9>
0004483:INFO:rom_table:  AP#0 ROM table #1 @ 0xe00ff000 (designer=43b part=4c9)
0004483:INFO:rom_table:  [0]<e000e000:SCS-M33 class=9 designer=43b part=d21 devtype=00 archid=2a04 devid=0:0:0>
0004483:INFO:rom_table:  [1]<e0001000:DWT class=9 designer=43b part=d21 devtype=00 archid=1a02 devid=0:0:0>
0004483:INFO:rom_table:  [2]<e0002000:BPU class=9 designer=43b part=d21 devtype=00 archid=1a03 devid=0:0:0>
0004513:INFO:rom_table:  [3]<e0000000:ITM class=9 designer=43b part=d21 devtype=43 archid=1a01 devid=0:0:0>
0004529:INFO:rom_table:[1]<e0040000:TPIU-M33 class=9 designer=43b part=d21 devtype=11 archid=0000 devid=0:0:ca0>
0004529:INFO:rom_table:AP#1 ROM table #0 @ 0xe00fe000 (designer=015 part=000)
0004544:INFO:rom_table:[0]<e00ff000:ROM class=1 designer=43b part=4c9>
0004544:INFO:rom_table:  AP#1 ROM table #1 @ 0xe00ff000 (designer=43b part=4c9)
0004544:INFO:rom_table:  [0]<e000e000:SCS-M33 class=9 designer=43b part=d21 devtype=00 archid=2a04 devid=0:0:0>
0004544:INFO:rom_table:  [1]<e0001000:DWT class=9 designer=43b part=d21 devtype=00 archid=1a02 devid=0:0:0>
0004560:INFO:rom_table:  [2]<e0002000:BPU class=9 designer=43b part=d21 devtype=00 archid=1a03 devid=0:0:0>
0004560:INFO:rom_table:  [3]<e0000000:ITM class=9 designer=43b part=d21 devtype=43 archid=1a01 devid=0:0:0>
0004560:INFO:rom_table:[1]<e0040000:TPIU-M33 class=9 designer=43b part=d21 devtype=11 archid=0000 devid=0:0:ca0>
0004576:INFO:cortex_m_v8m:CPU core #0 is Cortex-M33 r0p3 (security ext present)
0004576:INFO:cortex_m:FPU present: FPv5-SP
0004608:INFO:cortex_m_v8m:CPU core #1 is Cortex-M33 r0p3
0004622:INFO:dwt:4 hardware watchpoints
0004638:INFO:fpb:8 hardware breakpoints, 1 literal comparators
0004654:INFO:dwt:4 hardware watchpoints
0004654:INFO:fpb:8 hardware breakpoints, 1 literal comparators
0004701:INFO:server:Semihost server started on port 4444
0004701:INFO:gdbserver:GDB server started on port 3333
0004717:INFO:server:Semihost server started on port 4445
0004717:INFO:gdbserver:GDB server started on port 3334
0013952:INFO:gdbserver:One client connected!
[                    ]   0%0014220:ERROR:gdbserver:Unhandled exception in handle_message: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Traceback (most recent call last):
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 549, in handle_message
    reply = handler(msg[msgStart:])
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 768, in v_command
    return self.flash_op(data)
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 884, in flash_op
    self.flash_loader.commit()
  File "c:\python27\lib\site-packages\pyocd\flash\loader.py", line 508, in commit
    keep_unwritten=self._keep_unwritten)
  File "c:\python27\lib\site-packages\pyocd\flash\flash_builder.py", line 466, in program
    flash_operation = self._sector_erase_program_double_buffer(progress_cb)
  File "c:\python27\lib\site-packages\pyocd\flash\flash_builder.py", line 859, in _sector_erase_program_double_buffer
    self.flash.init(self.flash.Operation.ERASE)
  File "c:\python27\lib\site-packages\pyocd\flash\flash.py", line 235, in init
    self.target.reset_and_halt(Target.ResetType.SW)
  File "c:\python27\lib\site-packages\pyocd\core\coresight_target.py", line 333, in reset_and_halt
    return self.selected_core.reset_and_halt(reset_type)
  File "c:\python27\lib\site-packages\pyocd\target\builtin\target_LPC55S69JBD100.py", line 257, in reset_and_halt
    if (self.read32(base + FLASH_INT_STATUS) & 0x00000004) != 0:
  File "c:\python27\lib\site-packages\pyocd\core\memory_interface.py", line 56, in read32
    return self.read_memory(addr, 32, now)
  File "c:\python27\lib\site-packages\pyocd\coresight\cortex_m.py", line 614, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "c:\python27\lib\site-packages\pyocd\coresight\ap.py", line 564, in _read_memory
    result = read_mem_cb()
  File "c:\python27\lib\site-packages\pyocd\coresight\ap.py", line 546, in read_mem_cb
    res = result_cb()
  File "c:\python27\lib\site-packages\pyocd\coresight\dap.py", line 276, in read_ap_cb
    result = result_cb()
  File "c:\python27\lib\site-packages\pyocd\probe\cmsis_dap_probe.py", line 288, in read_ap_result_callback
    six.raise_from(self._convert_exception(error), error)
  File "c:\python27\lib\site-packages\six.py", line 737, in raise_from
    raise value
TransferFaultError: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
0014246:INFO:gdbserver:Client detached
0014247:INFO:gdbserver:Client disconnected!
flit commented 4 years ago

Thanks for the bug report! There are some known issues with programming LPC55S69 flash, see #693 and #715. Your log adds some valuable information that should help fix the bugs.

thegecko commented 4 years ago

I've just come across this issue when simply flashing the LPC55S69 using PyOCD

PyOCD: 0.23.0 Host: Mac OS 10.14.5 Target: LPC55S69 Pack: https://mcuxpresso.nxp.com/cmsis_pack/repo/NXP.LPC55S69_DFP.12.0.1.pack

It seems to flip-flop between a successful flash and then one which fails. It looks like the failed flash puts the board in a halted state which then allows the board to be flashed properly. It then resets and the cycle starts again.

Tested with native PyOCD support and by specifying the latest cmsis-pack and see the same problem:

Robs-iMac:bin thegecko$ ./pyocd flash --uid 023600001985bd0100000000000000000000000097969905 --target lpc55s69 --erase=chip --pack ~/Desktop/NXP.LPC55S69_DFP.12.0.1.pack /Users/User/mbed-os-example-blinky/BUILD/LPC55S69_NS/ARMC6/mbed-os-example-blinky.hex
[                    ]   0%0002378:CRITICAL:__main__:SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Traceback (most recent call last):
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/__main__.py", line 343, in run
    self._COMMANDS[self._args.cmd](self)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/__main__.py", line 480, in do_flash
    file_format=self._args.format)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/loader.py", line 160, in program
    self._loader.commit()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/loader.py", line 508, in commit
    keep_unwritten=self._keep_unwritten)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash_builder.py", line 460, in program
    flash_operation = self._chip_erase_program_double_buffer(progress_cb)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash_builder.py", line 701, in _chip_erase_program_double_buffer
    self.flash.init(self.flash.Operation.ERASE)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash.py", line 235, in init
    self.target.reset_and_halt(Target.ResetType.SW)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/core/coresight_target.py", line 389, in reset_and_halt
    return self.selected_core.reset_and_halt(reset_type)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/target/builtin/target_LPC55S69JBD100.py", line 257, in reset_and_halt
    if (self.read32(base + FLASH_INT_STATUS) & 0x00000004) != 0:
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/core/memory_interface.py", line 56, in read32
    return self.read_memory(addr, 32, now)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/cortex_m.py", line 617, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/ap.py", line 564, in _read_memory
    result = read_mem_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/ap.py", line 546, in read_mem_cb
    res = result_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/dap.py", line 276, in read_ap_cb
    result = result_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/probe/cmsis_dap_probe.py", line 288, in read_ap_result_callback
    six.raise_from(self._convert_exception(error), error)
  File "/Users/User/python/lib/python2.7/site-packages/six.py", line 737, in raise_from
    raise value
TransferFaultError: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Robs-iMac:bin thegecko$ ./pyocd flash --uid 023600001985bd0100000000000000000000000097969905 --target lpc55s69 --erase=chip --pack ~/Desktop/NXP.LPC55S69_DFP.12.0.1.pack /Users/User/mbed-os-example-blinky/BUILD/LPC55S69_NS/ARMC6/mbed-os-example-blinky.hex
[====================] 100%
0015417:INFO:loader:Erased chip, programmed 173056 bytes (338 pages), skipped 32256 bytes (63 pages) at 15.21 kB/s
Robs-iMac:bin thegecko$ ./pyocd flash --uid 023600001985bd0100000000000000000000000097969905 --target lpc55s69 --erase=chip --pack ~/Desktop/NXP.LPC55S69_DFP.12.0.1.pack /Users/User/mbed-os-example-blinky/BUILD/LPC55S69_NS/ARMC6/mbed-os-example-blinky.hex
[                    ]   0%0002331:CRITICAL:__main__:SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Traceback (most recent call last):
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/__main__.py", line 343, in run
    self._COMMANDS[self._args.cmd](self)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/__main__.py", line 480, in do_flash
    file_format=self._args.format)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/loader.py", line 160, in program
    self._loader.commit()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/loader.py", line 508, in commit
    keep_unwritten=self._keep_unwritten)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash_builder.py", line 460, in program
    flash_operation = self._chip_erase_program_double_buffer(progress_cb)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash_builder.py", line 701, in _chip_erase_program_double_buffer
    self.flash.init(self.flash.Operation.ERASE)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/flash/flash.py", line 235, in init
    self.target.reset_and_halt(Target.ResetType.SW)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/core/coresight_target.py", line 389, in reset_and_halt
    return self.selected_core.reset_and_halt(reset_type)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/target/builtin/target_LPC55S69JBD100.py", line 257, in reset_and_halt
    if (self.read32(base + FLASH_INT_STATUS) & 0x00000004) != 0:
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/core/memory_interface.py", line 56, in read32
    return self.read_memory(addr, 32, now)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/cortex_m.py", line 617, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/ap.py", line 564, in _read_memory
    result = read_mem_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/ap.py", line 546, in read_mem_cb
    res = result_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/coresight/dap.py", line 276, in read_ap_cb
    result = result_cb()
  File "/Users/User/python/lib/python2.7/site-packages/pyocd/probe/cmsis_dap_probe.py", line 288, in read_ap_result_callback
    six.raise_from(self._convert_exception(error), error)
  File "/Users/User/python/lib/python2.7/site-packages/six.py", line 737, in raise_from
    raise value
TransferFaultError: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
korjaa commented 4 years ago

I'm having similar issues. Sometimes it succeeds, sometimes it fails. If it fails, it fails nearly immediately and never gets to the "download" phase.

$ mbed_flash_pyocd_auto -t lpc55s69
[                    ]   0%0000841:CRITICAL:__main__:SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Traceback (most recent call last):
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/cmsis_dap_probe.py", line 294, in read_ap_result_callback
    return result()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 810, in read_reg_cb
    res = transfer.get_result()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 141, in get_result
    self.daplink.flush()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 665, in flush
    self._read_packet()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 894, in _read_packet
    decoded_data = cmd.decode_data(raw_data)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 449, in decode_data
    data = self._decode_transfer_data(data)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 356, in _decode_transfer_data
    self._check_response(data[2])
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 335, in _check_response
    raise DAPAccessIntf.TransferFaultError()
pyocd.probe.pydapaccess.dap_access_api.DAPAccessIntf.TransferFaultError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/__main__.py", line 344, in run
    self._COMMANDS[self._args.cmd](self)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/__main__.py", line 481, in do_flash
    file_format=self._args.format)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/flash/file_programmer.py", line 157, in program
    self._loader.commit()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/flash/loader.py", line 168, in commit
    keep_unwritten=self._keep_unwritten)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/flash/builder.py", line 466, in program
    flash_operation = self._sector_erase_program_double_buffer(progress_cb)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/flash/builder.py", line 859, in _sector_erase_program_double_buffer
    self.flash.init(self.flash.Operation.ERASE)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/flash/flash.py", line 235, in init
    self.target.reset_and_halt(Target.ResetType.SW)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/core/coresight_target.py", line 387, in reset_and_halt
    return self.selected_core.reset_and_halt(reset_type)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/target/builtin/target_LPC55S69JBD100.py", line 257, in reset_and_halt
    if (self.read32(base + FLASH_INT_STATUS) & 0x00000004) != 0:
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/core/memory_interface.py", line 56, in read32
    return self.read_memory(addr, 32, now)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/cortex_m.py", line 638, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 142, in _locking
    return func(self, *args, **kwargs)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 583, in _read_memory
    result = read_mem_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 565, in read_mem_cb
    res = result_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/dap.py", line 412, in read_ap_cb
    result = result_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/cmsis_dap_probe.py", line 297, in read_ap_result_callback
    six.raise_from(self._convert_exception(error), error)
  File "<string>", line 3, in raise_from
pyocd.core.exceptions.TransferFaultError: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
korjaa commented 4 years ago

I just encountered similar error message when I ran gdbserver with pyOCD and then issued monitor reset halt from gdb.

$ pyocd gdbserver -t lpc55s69
0000226:INFO:board:Target type is lpc55s69
0000288:INFO:dap:DP IDR = 0x6ba02477 (v2 rev6)
0000308:INFO:ap:AP#0 IDR = 0x84770001 (AHB-AP var0 rev8)
0000329:INFO:ap:AP#1 IDR = 0x84770001 (AHB-AP var0 rev8)
0000342:INFO:ap:AP#2 IDR = 0x002a0000 (proprietary)
0000375:INFO:rom_table:AP#0 ROM table #0 @ 0xe00fe000 (designer=015 part=000)
0000381:INFO:rom_table:[0]<e00ff000:ROM class=1 designer=43b part=4c9>
0000381:INFO:rom_table:  AP#0 ROM table #1 @ 0xe00ff000 (designer=43b part=4c9)
0000388:INFO:rom_table:  [0]<e000e000:SCS-M33 class=9 designer=43b part=d21 devtype=00 archid=2a04 devid=0:0:0>
0000407:INFO:rom_table:  [1]<e0001000:DWT class=9 designer=43b part=d21 devtype=00 archid=1a02 devid=0:0:0>
0000439:INFO:rom_table:  [2]<e0002000:BPU class=9 designer=43b part=d21 devtype=00 archid=1a03 devid=0:0:0>
0000451:INFO:rom_table:  [3]<e0000000:ITM class=9 designer=43b part=d21 devtype=43 archid=1a01 devid=0:0:0>
0000463:INFO:rom_table:[1]<e0040000:TPIU-M33 class=9 designer=43b part=d21 devtype=11 archid=0000 devid=0:0:ca0>
0000514:INFO:rom_table:AP#1 ROM table #0 @ 0xe00fe000 (designer=015 part=000)
0000527:INFO:rom_table:[0]<e00ff000:ROM class=1 designer=43b part=4c9>
0000527:INFO:rom_table:  AP#1 ROM table #1 @ 0xe00ff000 (designer=43b part=4c9)
0000531:INFO:rom_table:  [0]<e000e000:SCS-M33 class=9 designer=43b part=d21 devtype=00 archid=2a04 devid=0:0:0>
0000533:INFO:rom_table:  [1]<e0001000:DWT class=9 designer=43b part=d21 devtype=00 archid=1a02 devid=0:0:0>
0000535:INFO:rom_table:  [2]<e0002000:BPU class=9 designer=43b part=d21 devtype=00 archid=1a03 devid=0:0:0>
0000537:INFO:rom_table:  [3]<e0000000:ITM class=9 designer=43b part=d21 devtype=43 archid=1a01 devid=0:0:0>
0000539:INFO:rom_table:[1]<e0040000:TPIU-M33 class=9 designer=43b part=d21 devtype=11 archid=0000 devid=0:0:ca0>
0000544:INFO:cortex_m_v8m:CPU core #0 is Cortex-M33 r0p3 (security ext present)
0000552:INFO:cortex_m:FPU present: FPv5-SP
0000557:INFO:cortex_m_v8m:CPU core #1 is Cortex-M33 r0p3
0000569:INFO:dwt:4 hardware watchpoints
0000571:INFO:fpb:8 hardware breakpoints, 1 literal comparators
0000581:INFO:dwt:4 hardware watchpoints
0000583:INFO:fpb:8 hardware breakpoints, 1 literal comparators
0000598:INFO:server:Semihost server started on port 4444
0000598:INFO:gdbserver:GDB server started on port 3333
0000605:INFO:server:Semihost server started on port 4445
0000605:INFO:gdbserver:GDB server started on port 3334
0009359:INFO:gdbserver:One client connected!
0009510:INFO:gdbserver:Attempting to load Argon
0009511:INFO:gdbserver:Attempting to load FreeRTOS
0009512:INFO:gdbserver:Attempting to load Zephyr
0009513:INFO:gdbserver:Attempting to load RTX5
0009514:INFO:gdbserver:RTX5 loaded successfully
0012243:ERROR:gdbserver:Unhandled exception in handle_message: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3
Traceback (most recent call last):
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/cmsis_dap_probe.py", line 294, in read_ap_result_callback
    return result()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 810, in read_reg_cb
    res = transfer.get_result()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 141, in get_result
    self.daplink.flush()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 665, in flush
    self._read_packet()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 894, in _read_packet
    decoded_data = cmd.decode_data(raw_data)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 449, in decode_data
    data = self._decode_transfer_data(data)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 356, in _decode_transfer_data
    self._check_response(data[2])
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 335, in _check_response
    raise DAPAccessIntf.TransferFaultError()
pyocd.probe.pydapaccess.dap_access_api.DAPAccessIntf.TransferFaultError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/gdbserver/gdbserver.py", line 379, in handle_message
    reply = handler(msg[msgStart:])
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/gdbserver/gdbserver.py", line 887, in handle_query
    return self.handle_remote_command(cmd)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/gdbserver/gdbserver.py", line 1006, in handle_remote_command
    self.target.reset_and_halt()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/target/builtin/target_LPC55S69JBD100.py", line 257, in reset_and_halt
    if (self.read32(base + FLASH_INT_STATUS) & 0x00000004) != 0:
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/core/memory_interface.py", line 56, in read32
    return self.read_memory(addr, 32, now)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/cortex_m.py", line 638, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 142, in _locking
    return func(self, *args, **kwargs)
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 583, in _read_memory
    result = read_mem_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/ap.py", line 565, in read_mem_cb
    res = result_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/coresight/dap.py", line 412, in read_ap_cb
    result = result_cb()
  File "/home/jaakor01/workspace/pyOCD/venv3/lib/python3.6/site-packages/pyocd/probe/cmsis_dap_probe.py", line 297, in read_ap_result_callback
    six.raise_from(self._convert_exception(error), error)
  File "<string>", line 3, in raise_from
pyocd.core.exceptions.TransferFaultError: SWD/JTAG Transfer Fault @ 0x40034fe0-0x40034fe3

In GDB it shows like below

$ mbed_gdb_auto
GNU gdb (GNU Tools for Arm Embedded Processors 9-2019-q4-major) 8.3.0.20190709-git
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "--host=x86_64-linux-gnu --target=arm-none-eabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from BUILD/LPC55S69_NS/GCC_ARM-RELEASE/mbed-cloud-client-example_application.elf...
0x0007ac20 in hal_sleep () at ./mbed-os/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/sleep.c:24
24      __WFI();
(gdb) monitor reset halt
Protocol error with Rcmd
(gdb)

Regardless of the error I can issue continue and the gdb seems to work as expected and program execution continues.

JanneKiiskila commented 4 years ago

@mmahadevan108 @maclobdell - this one, too. They all might be interlinked.