Error while erase flash memory (NXP LPC55S69-EVK)

Start by reproducing pyocd erase on the NXP LPC55S69-EVK and read the traceback path through pyocd/flash/eraser.py, pyocd/flash/flash.py, and pyocd/target/family/target_lpc5500.py. Compare the failing reset-and-halt operation with the reported successful MCUXpresso erase; done means pyOCD can erase the board without a transfer timeout.

Hi,

I'm trying to erase the flash memory from NXP LPC55S69 board, but I'm having constantly the following output error:

Connected to LPC55S69 [Running]: 02360b000046f48b00000000000000000000000097969905
pyocd> halt
Successfully halted device
pyocd> erase
Transfer failed: 
Traceback (most recent call last):
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/cmsis_dap_probe.py", line 502, in read_ap_result_callback
    value = result()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 1060, in read_reg_cb
    res = transfer.get_result()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 154, in get_result
    self.daplink._read_packet()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/utility/concurrency.py", line 29, in _locking
    return func(self, *args, **kwargs)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 1146, in _read_packet
    decoded_data = cmd.decode_data(raw_data)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 480, in decode_data
    data = self._decode_transfer_data(data)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 386, in _decode_transfer_data
    self._check_response(data[2])
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/pydapaccess/dap_access_cmsis_dap.py", line 366, in _check_response
    raise DAPAccessIntf.TransferTimeoutError()
pyocd.probe.pydapaccess.dap_access_api.DAPAccessIntf.TransferTimeoutError

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

Traceback (most recent call last):
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/commands/repl.py", line 96, in run_one_command
    self.context.process_command_line(line)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/commands/execution_context.py", line 316, in process_command_line
    invoc.handler(invoc)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/commands/execution_context.py", line 417, in execute_command
    cmd_object.execute()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/commands/commands.py", line 915, in execute
    eraser.erase()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/flash/eraser.py", line 79, in erase
    self._chip_erase()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/flash/eraser.py", line 99, in _chip_erase
    region.flash.init(region.flash.Operation.ERASE)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/flash/flash.py", line 237, in init
    self.target.reset_and_halt()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/core/soc_target.py", line 266, in reset_and_halt
    return self.selected_core_or_raise.reset_and_halt(reset_type)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/target/family/target_lpc5500.py", line 325, in reset_and_halt
    self.read32(CortexM.DHCSR)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/core/memory_interface.py", line 116, in read32
    return self.read_memory(addr, 32, now)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/coresight/cortex_m.py", line 478, in read_memory
    result = self.ap.read_memory(addr, transfer_size, now)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/utility/concurrency.py", line 29, in _locking
    return func(self, *args, **kwargs)
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/coresight/ap.py", line 1084, in _read_memory
    result = read_mem_cb()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/coresight/ap.py", line 1062, in read_mem_cb
    res = result_cb()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/coresight/dap.py", line 889, in read_ap_cb
    result = result_cb()
  File "/home/daniel/.local/lib/python3.8/site-packages/pyocd/probe/cmsis_dap_probe.py", line 507, in read_ap_result_callback
    raise self._convert_exception(error) from error
pyocd.core.exceptions.TransferTimeoutError

The DAPLink firmware is this:

# DAPLink Firmware - see https://mbed.com/daplink
Unique ID: 02360b000046f48b00000000000000000000000097969905
HIC ID: 97969905
Auto Reset: 1
Automation allowed: 1
Overflow detection: 1
Daplink Mode: Interface
Interface Version: 0254
Bootloader Version: 0254
Git SHA: f499eb6ec4a847a2b78831fe1acc856fd8eb2f28
Local Mods: 1
USB Interfaces: MSD, CDC, HID, WebUSB
Bootloader CRC: 0x09974fb3
Interface CRC: 0x7174ab4c
Remount count: 0
URL: https://os.mbed.com/platforms/LPCXpresso55S69/

If I erase through the MCUXpresso IDE, I can after use pyocd to flash the memory. However, I would like to constantly use pyocd and not depend on the MCUXpresso to erase the memory everytime I need to reprogram the flash.