Regression erasing and programming NXP Kinetis targets

Start by reproducing the reported pyocd list and pyocd flash commands with the Dip Dap and FRDM-K22F setup. Read the traceback entry points in cmsis_dap_probe.py, dap_access_cmsis_dap.py, and dap.py, focusing on the No ACK received path. Done means identifying and documenting a reproducible cause or actionable fix for connecting to the Kinetis target.

I have a Dip Dap and I'm trying to use it to program the bootloader of a FRDM-K22F as described here.

I have connected the SWD IO, CLK and 3.3V/GND to the board, and install libusb-1.0. However some weird things happen. When I run pyocd list it says:

> pyocd list
  #   Probe                    Unique ID
---------------------------------------------------------------------------------
  0   Seeed Tiny BLE [nrf51]   9012000004a22ae300000000000000000000000097969902

That is definitely wrong, but maybe it doesn't matter.

Then when I try to flash it:

>pyocd flash "Downloads\0244_k20dx_bl_0x8000.bin" -t k20d50m
0001876:CRITICAL:__main__:No ACK received
Traceback (most recent call last):
  File "c:\python38\lib\site-packages\pyocd\probe\cmsis_dap_probe.py", line 312, in read_dp
    result = self._link.read_reg(reg_id, now=now)
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 899, in read_reg
    return read_reg_cb()
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 893, in read_reg_cb
    res = transfer.get_result()
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 147, in get_result
    self.daplink.flush()
  File "c:\python38\lib\site-packages\pyocd\utility\concurrency.py", line 28, in _locking
    return func(self, *args, **kwargs)
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 713, in flush
    self._read_packet()
  File "c:\python38\lib\site-packages\pyocd\utility\concurrency.py", line 28, in _locking
    return func(self, *args, **kwargs)
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 978, in _read_packet
    decoded_data = cmd.decode_data(raw_data)
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 453, in decode_data
    data = self._decode_transfer_block_data(data)
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 422, in _decode_transfer_block_data
    self._check_response(data[3])
  File "c:\python38\lib\site-packages\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 345, in _check_response
    raise DAPAccessIntf.TransferError("No ACK received")
pyocd.probe.pydapaccess.dap_access_api.DAPAccessIntf.TransferError: No ACK received

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

Traceback (most recent call last):
  File "c:\python38\lib\site-packages\pyocd\__main__.py", line 402, in run
    self._COMMANDS[self._args.cmd](self)
  File "c:\python38\lib\site-packages\pyocd\__main__.py", line 572, in do_flash
    with session:
  File "c:\python38\lib\site-packages\pyocd\core\session.py", line 339, in __enter__
    self.open()
  File "c:\python38\lib\site-packages\pyocd\core\session.py", line 457, in open
    self._board.init()
  File "c:\python38\lib\site-packages\pyocd\board\board.py", line 85, in init
    self.target.init()
  File "c:\python38\lib\site-packages\pyocd\core\soc_target.py", line 117, in init
    seq.invoke()
  File "c:\python38\lib\site-packages\pyocd\utility\sequencer.py", line 213, in invoke
    resultSequence.invoke()
  File "c:\python38\lib\site-packages\pyocd\utility\sequencer.py", line 208, in invoke
    resultSequence = call()
  File "c:\python38\lib\site-packages\pyocd\coresight\dap.py", line 376, in _connect
    connector.connect(self._protocol)
  File "c:\python38\lib\site-packages\pyocd\coresight\dap.py", line 166, in connect
    self._connect_dp(protocol)
  File "c:\python38\lib\site-packages\pyocd\coresight\dap.py", line 206, in _connect_dp
    self._idr = self.read_idr()
  File "c:\python38\lib\site-packages\pyocd\coresight\dap.py", line 233, in read_idr
    dpidr = self._probe.read_dp(DP_IDR, now=True)
  File "c:\python38\lib\site-packages\pyocd\probe\cmsis_dap_probe.py", line 315, in read_dp
    six.raise_from(self._convert_exception(error), error)
  File "<string>", line 3, in raise_from
pyocd.core.exceptions.TransferError: No ACK received

Any idea why this is?