我有一个连接到 Mac（Big Sur）的 TinyFPGA BX 板我正在尝试使用 tinyprog（https://pypi.org/project/tinyprog/）将新的引导加载程序上传到该板。我正在运行这个
>>>from tinyprog import *
>>>from tinyprog.__main__ import perform_bootloader_update
>>>tinyport=get_ports('1d50:6130')
>>>perform_bootloader_update(tinyport[0])
结果是：
The following update:
New Version: 1.0.1
Notes: Updates USB VID:PID to fix issues with APIO not recognizing the board.
is available for this board:
USB 20.3: TinyFPGA BX 1.0.0
UUID: cfaef439-1b38-4576-b1bc-970b9f5d5ee1
FPGA: ice40lp8k-cm81
Would you like to perform the update? [y/N] y
Fetching stage one...
Programming stage one...
Erasing: 100%|████████████████████████████| 135k/135k [00:00<00:00, 175kB/s]
Writing: 100%|████████████████████████████| 135k/135k [00:00<00:00, 163kB/s]
Reading: 100%|████████████████████████████| 135k/135k [00:00<00:00, 344kB/s]
---------------------------------------------------------------------------
USBError Traceback (most recent call last)
/var/folders/n5/kk2vsh296_s0w454yrchd3f00000gn/T/ipykernel_13323/2827260816.py in <module>
----> 1 perform_bootloader_update(tinyport[0])
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/tinyprog/__main__.py in perform_bootloader_update(port)
149 userimage_addr = p.meta.userimage_addr_range()[0]
150 if p.program_bitstream(userimage_addr, bitstream):
--> 151 p.boot()
152 print(" ...Success!")
153 else:
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/tinyprog/__init__.py in boot(self)
386 def boot(self):
387 try:
--> 388 self.ser.write(b"\x00")
389 self.ser.flush()
390 except SerialTimeoutException as e:
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/tinyprog/__init__.py in write(self, data)
90
91 def write(self, data):
---> 92 self.OUT.write(data)
93
94 def flush(self):
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/usb/core.py in write(self, data, timeout)
406 For details, see the Device.write() method.
407 """
--> 408 return self.device.write(self, data, timeout)
409
410 def read(self, size_or_buffer, timeout = None):
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/usb/core.py in write(self, endpoint, data, timeout)
987 fn = fn_map[util.endpoint_type(ep.bmAttributes)]
988
--> 989 return fn(
990 self._ctx.handle,
991 ep.bEndpointAddress,
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/usb/backend/libusb1.py in bulk_write(self, dev_handle, ep, intf, data, timeout)
835 @methodtrace(_logger)
836 def bulk_write(self, dev_handle, ep, intf, data, timeout):
--> 837 return self.__write(self.lib.libusb_bulk_transfer,
838 dev_handle,
839 ep,
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/usb/backend/libusb1.py in __write(self, fn, dev_handle, ep, intf, data, timeout)
936 # do not assume LIBUSB_ERROR_TIMEOUT means no I/O.
937 if not (transferred.value and retval == LIBUSB_ERROR_TIMEOUT):
--> 938 _check(retval)
939
940 return transferred.value
/opt/anaconda3/envs/verilogenv38/lib/python3.8/site-packages/usb/backend/libusb1.py in _check(ret)
602 raise USBTimeoutError(_strerror(ret), ret, _libusb_errno[ret])
603 else:
--> 604 raise USBError(_strerror(ret), ret, _libusb_errno[ret])
605
606 return ret
USBError: [Errno 5] Input/Output Error
我对此的理解是，板子可以更新，但是 tinyprog 正在尝试启动板子，但失败了。我可以仅使用 pyusb 访问此 USB 设备，但是当我尝试在 pyusb 中使用 ser.write 写入时，再次出现相同的错误。
这是电路板本身的问题还是 tinyprog 无法正常工作？