NFCPY/libUSB崩溃运行示例

Question

我在Mac Lion上安装了NFCPY，pyUSB和libusb。我使用的是普通的ACR122U NFC读卡器，当我尝试运行其中任何一个示例时，它会崩溃。我知道很多人在NFCPY上使用同一位读者，我不知道为什么它不适合我。

Python不显示任何错误，但是我可以看到在日志文件中该堆栈跟踪：

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 
0 libusb-1.0.dylib    0x000000010f799bda darwin_reset_device + 10 (darwin_usb.c:1213) 
1 libffi.dylib     0x00007fff87b2fe7c ffi_call_unix64 + 76 
2 libffi.dylib     0x00007fff87b30ae9 ffi_call + 728 
3 _ctypes.so      0x000000010f78033f _ctypes_callproc + 735 
4 _ctypes.so      0x000000010f77afd2 0x10f777000 + 16338 
5 org.python.python    0x000000010f360d32 PyObject_Call + 97 
6 org.python.python    0x000000010f3e0f63 PyEval_EvalFrameEx + 14353 
7 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
8 org.python.python    0x000000010f381abf 0x10f359000 + 166591 
9 org.python.python    0x000000010f360d32 PyObject_Call + 97 
10 org.python.python    0x000000010f3e15ec PyEval_EvalFrameEx + 16026 
11 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
12 org.python.python    0x000000010f3e3e6c 0x10f359000 + 568940 
13 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
14 org.python.python    0x000000010f3e3df7 0x10f359000 + 568823 
15 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
16 org.python.python    0x000000010f3e3df7 0x10f359000 + 568823 
17 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
18 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
19 org.python.python    0x000000010f381abf 0x10f359000 + 166591 
20 org.python.python    0x000000010f360d32 PyObject_Call + 97 
21 org.python.python    0x000000010f36f6e9 0x10f359000 + 91881 
22 org.python.python    0x000000010f360d32 PyObject_Call + 97 
23 org.python.python    0x000000010f3ab484 0x10f359000 + 337028 
24 org.python.python    0x000000010f3a5b7a 0x10f359000 + 314234 
25 org.python.python    0x000000010f360d32 PyObject_Call + 97 
26 org.python.python    0x000000010f3e0f63 PyEval_EvalFrameEx + 14353 
27 org.python.python    0x000000010f3e3df7 0x10f359000 + 568823 
28 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
29 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
30 org.python.python    0x000000010f3e3e6c 0x10f359000 + 568940 
31 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
32 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
33 org.python.python    0x000000010f381abf 0x10f359000 + 166591 
34 org.python.python    0x000000010f360d32 PyObject_Call + 97 
35 org.python.python    0x000000010f36f6e9 0x10f359000 + 91881 
36 org.python.python    0x000000010f360d32 PyObject_Call + 97 
37 org.python.python    0x000000010f3ab484 0x10f359000 + 337028 
38 org.python.python    0x000000010f3a5b7a 0x10f359000 + 314234 
39 org.python.python    0x000000010f360d32 PyObject_Call + 97 
40 org.python.python    0x000000010f3e0f63 PyEval_EvalFrameEx + 14353 
41 org.python.python    0x000000010f3e3df7 0x10f359000 + 568823 
42 org.python.python    0x000000010f3e0e0a PyEval_EvalFrameEx + 14008 
43 org.python.python    0x000000010f3e3cd8 PyEval_EvalCodeEx + 1996 
44 org.python.python    0x000000010f3e3d4d PyEval_EvalCode + 54 
45 org.python.python    0x000000010f3fb08f 0x10f359000 + 663695 
46 org.python.python    0x000000010f3fb14f PyRun_FileExFlags + 157 
47 org.python.python    0x000000010f3fc2a2 PyRun_SimpleFileExFlags + 392 
48 org.python.python    0x000000010f40c2af Py_Main + 2715 
49 org.python.python    0x000000010f34ee88 0x10f34e000 + 3720 

Thread 1:: org.libusb.device-detach 
0 libsystem_kernel.dylib   0x00007fff90e2967a mach_msg_trap + 10 
1 libsystem_kernel.dylib   0x00007fff90e28d71 mach_msg + 73 
2 com.apple.CoreFoundation  0x00007fff90082b6c __CFRunLoopServiceMachPort + 188 
3 com.apple.CoreFoundation  0x00007fff9008b2d4 __CFRunLoopRun + 1204 
4 com.apple.CoreFoundation  0x00007fff9008aae6 CFRunLoopRunSpecific + 230 
5 com.apple.CoreFoundation  0x00007fff9009a7ff CFRunLoopRun + 95 
6 libusb-1.0.dylib    0x000000010f79e997 event_thread_main + 631 (darwin_usb.c:369) 
7 libsystem_c.dylib    0x00007fff903888bf _pthread_start + 335 
8 libsystem_c.dylib    0x00007fff9038bb75 thread_start + 13 

Thread 2:: Dispatch queue: com.apple.libdispatch-manager 
0 libsystem_kernel.dylib   0x00007fff90e2b7e6 kevent + 10 
1 libdispatch.dylib    0x00007fff92d9e5be _dispatch_mgr_invoke + 923 
2 libdispatch.dylib    0x00007fff92d9d14e _dispatch_mgr_thread + 54 

Thread 3: 
0 libsystem_kernel.dylib   0x00007fff90e2b192 __workq_kernreturn + 10 
1 libsystem_c.dylib    0x00007fff9038a594 _pthread_wqthread + 758 
2 libsystem_c.dylib    0x00007fff9038bb85 start_wqthread + 13 

Thread 0 crashed with X86 Thread State (64-bit): 
    rax: 0x000000010f7a2320 rbx: 0x0000000000000000 rcx: 0x000000010f985f80 rdx: 0x0000000000000000 
    rdi: 0x0000000000000000 rsi: 0x0000000000000001 rbp: 0x00007fff6ef4baa0 rsp: 0x00007fff6ef4ba90 
    r8: 0x000000010f48e840 r9: 0x0000000000000000 r10: 0x00007fff6ef4ba00 r11: 0x000000010f795340 
    r12: 0xffffffffffffffff r13: 0x0000000000000001 r14: 0x0000000000000000 r15: 0x00007fff6ef4bab0 
    rip: 0x000000010f799bda rfl: 0x0000000000010246 cr2: 0x0000000000000058 
Logical CPU: 1 

任何帮助将是非常赞赏，我坚持这许多天

Answer 1

在libusb中查看darwin_reset_device()的the source，并且给出了它在崩溃函数中的早期版本（只有10个字节），我的猜测是要么传递给darwin_reset_device()的dev_handle或dev_handle->dev为NULL。

搞清楚为什么发生这种情况很复杂 - 有很多代码和图层需要排除故障（libusb，pyusb，nfcpy）。也许你可以看看其他人是否成功在Lion上运行nfcpy，并且他们的工作方式有所不同（Xcode版本，nfcpy版本等）

另一个建议（根据我对Mac上的USB驱动程序的经验） ：拔出每连接到电脑的USB设备。这包括任何第三方鼠标/键盘。

Answer 2

使用ACR122U和python的最佳工具是pyscard和RFIDIOt，它是pyscard和libnfc的包装。 pyscard能应付得很好，这里有一个例子：

http://ludovicrousseau.blogspot.com.br/2010/04/pcsc-sample-in-python.html