在ACR122U NFC读取器上强制使用PC/SC驱动程序 [英] Force PC/SC driver on ACR122U NFC reader

问题描述

我无法使用ACS的ACR122U RFID读卡器.我需要使用PC/SC驱动程序将其连接到Mac.我从ACS网站安装了驱动程序，并确认它正在运行.

I have trouble with using my ACR122U RFID card reader form ACS. I need to connect it to my Mac using the PC/SC driver. I installed the driver from the ACS website and confirmed that it's running.

但是，每当我使用nfc-list命令进行测试时，都会出现以下错误:

However, whenever I test using the nfc-list command, I get the following error:

nfc-list uses libnfc libnfc-1.7.1-189-g2869ae2
error   libnfc.driver.acr122_usb        Unable to claim USB interface (Permission denied)
nfc-list: ERROR: Unable to open NFC device: acr122_usb:020:002

从谷歌浏览器了解到，是Mac接管了USB，阻止了PC/SC使用该设备，但是如何强制计算机使用PC/SC驱动程序而不是默认的Apple USB?

As far as I've understood from googling is that it is the Mac taking over the USB that prevents PC/SC using the device, but how can I force the computer to use the PC/SC driver instead of the default Apple USB?

PS:我已经安装了libusb

PS: I have installed libusb

推荐答案

您似乎在混合使用两种不同的方法将ACR122U连接到libnfc:

You seem to be mixing two different options for connecting the ACR122U to libnfc:

1. 您可以使用ACR122U的直接USB驱动程序libnfc.driver.acr122_usb(这是您当前正在使用的).在这种情况下，您需要确保PC/SC守护程序不会接管读取器的控制(因为一次只能有一个实例可以访问读取器的USB接口).

1. You can either use the direct USB driver for the ACR122U, libnfc.driver.acr122_usb (which is what you are currently using). In this case, you need to make sure that the PC/SC daemon does not take over control of the reader (since only one instance can access the USB interface of the reader at a time).

• 快速修复方法是禁用控制ACR122U的PC/SC守护程序.尽管在Mac OS X上并非如此，但可以在

• The quick-and-dirty fix is to disable the PC/SC daemon that takes control over the ACR122U. Though this is not straight forward on Mac OS X, a detailed explanation can be found in Ludovic's blog.

• Alternatively, you could prevent the PC/SC daemon from taking control over that specific reader by editing /usr/libexec/SmartCardServices/drivers/ifd-ccid.bundle/Contents/Info.plist. You would need search for the entry

<key>ifdProductID</key>

在此条目下，有一系列形式为

Below this entry, there is an array of entries of the form

<string>0xXXXX</string>

您将需要搜索包含值0x2200、0x90CC和0x2214的条目.删除这些行，但要记住相对的行号(即<array>中的偏移量).然后，还要删除

You will need to search for entries containing the values 0x2200, 0x90CC, and 0x2214. Remove those lines, but remember the relative line number (i.e. the offset in the <array>). Then, also remove the corresponding lines under

<key>ifdVendorID</key>

它们都应包含值0x072F，并因此具有格式

They should all contain the value 0x072F and thus have the form

<string>0x072F</string>

此外，您还需要删除下面的相应行

Moreover, you also need to remove the corresponding lines under

<key>ifdFriendlyName</key>

所有这些都可能以<string>ACS开头.

All of them will probably start with <string>ACS.

或者，您可以对ACR122U(libnfc.driver.acr122_pcsc)使用基于PC/SC的libnfc驱动程序.该驱动程序使用系统PC/SC守护程序访问读取器，而不是直接控制USB接口.为了使此选项起作用，您需要将lib-nfc配置为使用PC/SC驱动程序而不是直接USB驱动程序.自己编译libnfc时，可以通过显式激活仅基于PC/SC的驱动程序来实现:

Alternatively, you could use the PC/SC based libnfc driver for the ACR122U (libnfc.driver.acr122_pcsc). This driver uses the system PC/SC daemon to access the reader instead of taking control over the USB interface directly. For this option to work, you need to configure lib-nfc to use the PC/SC driver instead of the direct USB driver. When you compile libnfc yourself, you could do this by explicitly activating only the PC/SC based driver:

./configure --with-drivers=acr122_pcsc
make

但是，请注意，该驱动程序已过时，libnfc作者强烈反对使用该驱动程序.

However, note that this driver has been depreciated and libnfc authors strongly discourage its use.

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