HIDError: Report size has to be 1025 elements (bytes)

[shank923]

Hi, when I run "pyocd gdbserver" command, I get this error.

0000253:INFO:board:Target type is cortex_m 0000253:WARNING:board:Generic 'cortex_m' target type is selected; is this intentional? You will be able to debug but not program flash. To set the target type use the '--target' argument or 'target_override' option. Use 'pyocd list --targets' to see available targets types. 0000269:CRITICAL:main:uncaught exception: Report size has to be 1025 elements (bytes) Traceback (most recent call last): File "build\bdist.win32\egg\pyocd__main.py", line 338, in run self._COMMANDSself._args.cmd File "build\bdist.win32\egg\pyocd__main__.py", line 566, in do_gdbserver with session: File "build\bdist.win32\egg\pyocd\core\session.py", line 287, in enter__ self.open() File "build\bdist.win32\egg\pyocd\core\session.py", line 363, in open self._probe.open() File "build\bdist.win32\egg\pyocd\probe\cmsis_dap_probe.py", line 141, in open self._link.open() File "build\bdist.win32\egg\pyocd\probe\pydapaccess\dap_access_cmsis_dap.py", line 552, in open self._packet_count = self._protocol.dap_info(self.ID.MAX_PACKET_COUNT) File "build\bdist.win32\egg\pyocd\probe\pydapaccess\cmsis_dap_core.py", line 126, in dap_info self.interface.write(cmd) File "build\bdist.win32\egg\pyocd\probe\pydapaccess\interface\pywinusb_backend.py", line 144, in write self.report.send([0] + data) File "build\bdist.win-amd64\egg\pywinusb\hid\core.py", line 1475, in send % self.__raw_report_size) HIDError: Report size has to be 1025 elements (bytes)

[shank923]

I'm using LPC-LINK 2 board with LPC4370 on-board MCU

[flit]

This is a known issue with LPC-Link2 and pywinusb. You can try the hidapi USB backend instead, which should work. Just run 'pip install hidapi'. pywinusb is still the default for Windows mostly for historical reasons, but it changing this to hidapi might make sense.