pyserial serialwin32.py具有属性

Traceback (most recent call last): ....... File "C:\Python27\lib\site-packages\serial\serialwin32.py", line 47, in open if port.upper().startswith('COM') and int(port[3:]) > 8: AttributeError: 'int' object has no attribute 'upper'

File "C:\Python27\lib\site-packages\serial\serialwin32.py", line 66, in open raise SerialException("could not open port %r: %r" % (self.portstr, ctypes.WinError())) serial.serialutil.SerialException: could not open port 'COM6': WindowsError(5, 'Access is denied.')

self.hComPort = win32.CreateFile(port, win32.GENERIC_READ | win32.GENERIC_WRITE, 0, # exclusive access None, # no security win32.OPEN_EXISTING, win32.FILE_ATTRIBUTE_NORMAL | win32.FILE_FLAG_OVERLAPPED, 0) if self.hComPort == win32.INVALID_HANDLE_VALUE: self.hComPort = None # 'cause __del__ is called anyway raise SerialException("could not open port %r: %r" % (self.portstr, ctypes.WinError()))

#!/usr/bin/python # eMPL_client.py # A PC application for use with Embedded MotionApps. # Copyright 2012 InvenSense, Inc. All Rights Reserved. import serial, sys, time, string, pygame from ponycube import * class eMPL_packet_reader: def __init__(self, port, quat_delegate=None, debug_delegate=None, data_delegate=None ): self.s = serial.Serial(port,115200) self.s.setTimeout(0.1) self.s.setWriteTimeout(0.2) # TODO: Will this break anything? ##Client attempts to write to eMPL. #try: #self.s.write("\n") #except serial.serialutil.SerialTimeoutException: #pass # write will timeout if umpl app is already started. if quat_delegate: self.quat_delegate = quat_delegate else: self.quat_delegate = empty_packet_delegate() if debug_delegate: self.debug_delegate = debug_delegate else: self.debug_delegate = empty_packet_delegate() if data_delegate: self.data_delegate = data_delegate else: self.data_delegate = empty_packet_delegate() self.packets = [] self.length = 0 self.previous = None def read(self): NUM_BYTES = 23 p = None while self.s.inWaiting() >= NUM_BYTES: rs = self.s.read(NUM_BYTES) if ord(rs[0]) == ord('$'): pkt_code = ord(rs[1]) if pkt_code == 1: d = debug_packet(rs) self.debug_delegate.dispatch(d) elif pkt_code == 2: p = quat_packet(rs) self.quat_delegate.dispatch(p) elif pkt_code == 3: d = data_packet(rs) self.data_delegate.dispatch(d) else: print "no handler for pkt_code",pkt_code else: c = ' ' print "serial misaligned!" while not ord(c) == ord('$'): c = self.s.read(1) self.s.read(NUM_BYTES-1) def write(self,a): self.s.write(a) def close(self): self.s.close() def write_log(self,fname): f = open(fname,'w') for p in self.packets: f.write(p.logfile_line()) f.close() # =========== PACKET DELEGATES ========== class packet_delegate(object): def loop(self,event): print "generic packet_delegate loop w/event",event def dispatch(self,p): print "generic packet_delegate dispatched",p class empty_packet_delegate(packet_delegate): def loop(self,event): pass def dispatch(self,p): pass class cube_packet_viewer (packet_delegate): def __init__(self): self.screen = Screen(480,400,scale=1.5) self.cube = Cube(30,60,10) self.q = Quaternion(1,0,0,0) self.previous = None # previous quaternion self.latest = None # latest packet (get in dispatch, use in loop) def loop(self,event): packet = self.latest if packet: q = packet.to_q().normalized() self.cube.erase(self.screen) self.cube.draw(self.screen,q) pygame.display.flip() self.latest = None def dispatch(self,p): if isinstance(p,quat_packet): self.latest = p class debug_packet_viewer (packet_delegate): def loop(self,event): pass def dispatch(self,p): assert isinstance(p,debug_packet); p.display() class data_packet_viewer (packet_delegate): def loop(self,event): pass def dispatch(self,p): assert isinstance(p,data_packet); p.display() # =============== PACKETS ================= # For 16-bit signed integers. def two_bytes(d1,d2): d = ord(d1)*256 + ord(d2) if d > 32767: d -= 65536 return d # For 32-bit signed integers. def four_bytes(d1, d2, d3, d4): d = ord(d1)*(1<<24) + ord(d2)*(1<<16) + ord(d3)*(1<<8) + ord(d4) if d > 2147483648: d-= 4294967296 return d class debug_packet (object): # body of packet is a debug string def __init__(self,l): sss = [] for c in l[3:21]: if ord(c) != 0: sss.append(c) self.s = "".join(sss) def display(self): sys.stdout.write(self.s) class data_packet (object): def __init__(self, l): self.data = [0,0,0,0,0,0,0,0,0] self.type = ord(l[2]) if self.type == 0: # accel self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<16) self.data[1] = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<16) self.data[2] = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<16) elif self.type == 1: # gyro self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<16) self.data[1] = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<16) self.data[2] = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<16) elif self.type == 2: # compass self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<16) self.data[1] = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<16) self.data[2] = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<16) elif self.type == 3: # quat self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<30) self.data[1] = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<30) self.data[2] = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<30) self.data[3] = four_bytes(l[15],l[16],l[17],l[18]) * 1.0 / (1<<30) elif self.type == 4: # euler self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<16) self.data[1] = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<16) self.data[2] = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<16) elif self.type == 5: # rot self.data[0] = two_bytes(l[3],l[4]) * 1.0 / (1<<14) self.data[1] = two_bytes(l[5],l[6]) * 1.0 / (1<<14) self.data[2] = two_bytes(l[7],l[8]) * 1.0 / (1<<14) self.data[3] = two_bytes(l[9],l[10]) * 1.0 / (1<<14) self.data[4] = two_bytes(l[11],l[12]) * 1.0 / (1<<14) self.data[5] = two_bytes(l[13],l[14]) * 1.0 / (1<<14) self.data[6] = two_bytes(l[15],l[16]) * 1.0 / (1<<14) self.data[7] = two_bytes(l[17],l[18]) * 1.0 / (1<<14) self.data[8] = two_bytes(l[19],l[20]) * 1.0 / (1<<14) elif self.type == 6: # heading self.data[0] = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<16) else: # unsupported pass def display(self): if self.type == 0: print 'accel: %7.3f %7.3f %7.3f' % \ (self.data[0], self.data[1], self.data[2]) elif self.type == 1: print 'gyro: %9.5f %9.5f %9.5f' % \ (self.data[0], self.data[1], self.data[2]) elif self.type == 2: print 'compass: %7.4f %7.4f %7.4f' % \ (self.data[0], self.data[1], self.data[2]) elif self.type == 3: print 'quat: %7.4f %7.4f %7.4f %7.4f' % \ (self.data[0], self.data[1], self.data[2], self.data[3]) elif self.type == 4: print 'euler: %7.4f %7.4f %7.4f' % \ (self.data[0], self.data[1], self.data[2]) elif self.type == 5: print 'rotation matrix: \n%7.3f %7.3f %7.3f\n%7.3f %7.3f %7.3f\n%7.3f %7.3f %7.3f' % \ (self.data[0], self.data[1], self.data[2], self.data[3], \ self.data[4], self.data[5], self.data[6], self.data[7], \ self.data[8]) elif self.type == 6: print 'heading: %7.4f' % self.data[0] else: print 'what?' class quat_packet (object): def __init__(self, l): self.l = l self.q0 = four_bytes(l[3],l[4],l[5],l[6]) * 1.0 / (1<<30) self.q1 = four_bytes(l[7],l[8],l[9],l[10]) * 1.0 / (1<<30) self.q2 = four_bytes(l[11],l[12],l[13],l[14]) * 1.0 / (1<<30) self.q3 = four_bytes(l[15],l[16],l[17],l[18]) * 1.0 / (1<<30) def display_raw(self): l = self.l print "".join( [ str(ord(l[0])), " "] + \ [ str(ord(l[1])), " "] + \ [ str(ord(a)).ljust(4) for a in [ l[2], l[3], l[4], l[5], l[6], l[7], l[8], l[9], l[10] ] ] + \ [ str(ord(a)).ljust(4) for a in [ l[8], l[9], l[10] , l[11], l[12], l[13]] ] ) def display(self): if 1: print "qs " + " ".join([str(s).ljust(15) for s in [ self.q0, self.q1, self.q2, self.q3 ]]) if 0: euler0, euler1, euler2 = self.to_q().get_euler() print "eulers " + " ".join([str(s).ljust(15) for s in [ euler0, euler1, euler2 ]]) if 0: euler0, euler1, euler2 = self.to_q().get_euler() print "eulers " + " ".join([str(s).ljust(15) for s in [ (euler0 * 180.0 / 3.14159) - 90 ]]) def to_q(self): return Quaternion(self.q0, self.q1, self.q2, self.q3) # =============== MAIN ====================== if __name__ == "__main__": if len(sys.argv) == 2: comport = int(sys.argv[1]) - 1 else: print "usage: " + sys.argv[0] + " port" sys.exit(-1) pygame.init() viewer = cube_packet_viewer() debug = debug_packet_viewer() data = data_packet_viewer() reader = eMPL_packet_reader(comport, quat_delegate = viewer, debug_delegate = debug, data_delegate = data) while 1: event = pygame.event.poll() # TODO: Allow exit via keystroke. if event.type == pygame.QUIT: viewer.close() break if event.type == pygame.KEYDOWN: reader.write(pygame.key.name(event.key)) reader.read() viewer.loop(event) debug.loop(event) data.loop(event) # TODO: If system load is too high, increase this sleep time. pygame.time.delay(0)

#! python import ctypes import time from serial import win32 import serial from serial.serialutil import SerialBase, SerialException, to_bytes, portNotOpenError, writeTimeoutError class Serial(SerialBase): """Serial port implementation for Win32 based on ctypes.""" BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200) def __init__(self, *args, **kwargs): super(SerialBase, self).__init__() self._port_handle = None self._overlapped_read = None self._overlapped_write = None SerialBase.__init__(self, *args, **kwargs) def open(self): """\ Open port with current settings. This may throw a SerialException if the port cannot be opened. """ if self._port is None: raise SerialException("Port must be configured before it can be used.") if self.is_open: raise SerialException("Port is already open.") # the "\\.\COMx" format is required for devices other than COM1-COM8 # not all versions of windows seem to support this properly # so that the first few ports are used with the DOS device name str port = self.name try: if port.upper().startswith('COM') and int(port[3:]) > 8: port = '\\\\.\\' + port except ValueError: # for like COMnotanumber pass self._port_handle = win32.CreateFile( port, win32.GENERIC_READ | win32.GENERIC_WRITE, 0, # exclusive access None, # no security win32.OPEN_EXISTING, win32.FILE_ATTRIBUTE_NORMAL | win32.FILE_FLAG_OVERLAPPED, 0) if self._port_handle == win32.INVALID_HANDLE_VALUE: self._port_handle = None # 'cause __del__ is called anyway raise SerialException("could not open port %r: %r" % (self.portstr, ctypes.WinError())) try: self._overlapped_read = win32.OVERLAPPED() self._overlapped_read.hEvent = win32.CreateEvent(None, 1, 0, None) self._overlapped_write = win32.OVERLAPPED() #~ self._overlapped_write.hEvent = win32.CreateEvent(None, 1, 0, None) self._overlapped_write.hEvent = win32.CreateEvent(None, 0, 0, None) # Setup a 4k buffer win32.SetupComm(self._port_handle, 4096, 4096) # Save original timeout values: self._orgTimeouts = win32.COMMTIMEOUTS() win32.GetCommTimeouts(self._port_handle, ctypes.byref(self._orgTimeouts)) self._reconfigure_port() # Clear buffers: # Remove anything that was there win32.PurgeComm( self._port_handle, win32.PURGE_TXCLEAR | win32.PURGE_TXABORT | win32.PURGE_RXCLEAR | win32.PURGE_RXABORT) except: try: self._close() except: # ignore any exception when closing the port # also to keep original exception that happened when setting up pass self._port_handle = None raise else: self.is_open = True

3条回答

网友

1楼 · 编辑于 2024-04-29 05:55:47

回答1）因为这依赖于可用的硬件，所以测试代码完全有可能在它所编写的环境中工作，但在您的环境中不工作-如果您在Windows上，而这是在Linux上编写的，则很可能是这样。代码使用端口0-不知道如何映射到COM1等

2）在Windows上，COM端口以前有DOS名称，如COM1、COM2，即字符串，而不是int（它们不像TCP/IP端口号）。最近在Windows中有一种允许更通用的名称的“\.\COMnotanumber”格式，我见过USB到串行转换器使用这种格式。快速查看了serialutil.py中pyserial SerialBase的源代码后，我觉得有点奇怪，因为AFAICT self.name只在通过调用self.port（portname）使用显式端口设置时才被设置。您可能希望尝试使用serport=serial（0）初始化串行端口实例，然后显式调用serport.port（'COM1'）（或者使用您的端口名而不是COM1）。

网友

2楼 · 编辑于 2024-04-29 05:55:47

在pySerial 3.x中，使用数字作为端口的可能性已被删除。请改用设备名（字符串），例如"/dev/ttyS0"、"COM4"等

这些数字在操作系统中并不一致，有时甚至不包括所有设备。您可以使用serial.tools.list_port模块枚举大多数操作系统上实际可用的串行端口。

网友

3楼 · 编辑于 2024-04-29 05:55:47

您可能有错误的serialwin32.py版本。在尝试另一个版本之前，我收到了相同的错误消息。我在这里使用2.7 https://pypi.python.org/pypi/pyserial/2.7。然后我简单地键入'empl-client.py 8'，错误消息就消失了。我也没有为“Embedded MotionApps”设备安装驱动程序。所以，我在motion_driver_6.12文件夹中找到了eMPL_CDC.inf，并通过设备管理器安装了它。

现在我遇到的问题是嵌入式MotionApps设备在Windows中持续连接和重新连接。虽然Pygame现在正在运行，但只是坐在那里的一个黑屏。Invensense告诉我，这意味着它已经连接并等待数据。

看起来I2C总线上有数据，如果端口保持连接，也许可以工作。虽然当端口断开连接时数据从总线上消失，但可能整个程序正在重置。实际上，代码中有一个msp430_reset（）函数，它看起来确实被调用了。

相关问题更多 >

编程相关推荐

热门问题

热门文章