Errrno 32管道錯誤，escpos python2

我需要測試Epson POS打印機TM-U220PD。我有它通過並行轉換器連接到我的筆記本電腦。這是完全安裝，但是當我與Python escpos測試它顯示我以下錯誤：Errrno 32管道錯誤，escpos python2

Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/local/lib/python2.7/dist-packages/escpos/escpos.py", line 437, in text 
    self._raw(txt.encode()) 
    File "/usr/local/lib/python2.7/dist-packages/escpos/printer.py", line 85, in _raw 
    self.device.write(self.out_ep, msg, self.timeout) 
    File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 948, in write 
    self.__get_timeout(timeout) 
    File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 824, in bulk_write 
    timeout) 
    File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 920, in __write 
    _check(retval) 
    File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 595, in _check 
    raise USBError(_strerror(ret), ret, _libusb_errno[ret]) 
usb.core.USBError: [Errno 32] Pipe error

這是用來測試的代碼：

>>> from escpos.printer import Usb 
>>> p = Usb(0x067b, 0x2305) 
>>> p.open() 
>>> p.text()

來源

2017-10-07 RooYnnER

這樣的USB到並行轉換器應該由你的系統安裝到文件系統中（我認爲你從一個* nix中判斷你的蹤跡）。通常情況下這是類似/dev/usb/lp0。

對於初次調試你可以嘗試只是寫這個「文件」：

echo "Test\n" > /dev/usb/lp0

如果這個工程，你應該能夠成功地與打印：

from escpos.printer import File 
p = File(devfile='/dev/usb/lp0') 
p.text("some text\n")

來源

2017-10-08 20:45:20

Errrno 32管道錯誤，escpos python2

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