如何使用FTDI D2XX驱动程序API获取Linux设备 [英] How can I get Linux device with FTDI D2XX driver API

问题描述

我正在使用 FTDI D2XX 驱动程序API与FTDI设备进行通信. 它为我提供了有关设备的信息，例如locid，序列号，描述，但还不够.

I am using FTDI D2XX driver API to communicate with a FTDI device. It gives me some information about the device like locid, serialnumber, description but it is not enough.

如何通过此API获取设备号(/dev/ttyUSBXX)或总线或端口.

How can I get the device number (/dev/ttyUSBXX) or bus or port with this API.

谢谢

推荐答案

作为 D2XX程序员指南在引言中指出:

对于Linux，Mac OS X(10.4和更高版本)和Windows CE(4.2和更高版本)，D2XX驱动程序和VCP驱动程序是 相互排斥选项，因为对于给定的设备ID，在给定的时间只能安装一种驱动程序类型.

For Linux, Mac OS X (10.4 and later) and Windows CE (4.2 and later) the D2XX driver and VCP driver are mutually exclusive options as only one driver type may be installed at a given time for a given device ID.

问题是您的Linux可能会自动加载VCP驱动程序(ftdi_sio)，因此您不能使用D2XX驱动程序.在您的终端中键入以下内容，以确保ftdi_sio已加载:

The problem is that your Linux may automatically loads the VCP driver (ftdi_sio) and therefore you cannot use D2XX driver. Type the following into your terminal to make sure, the ftdi_sio is loaded:

sudo lsmod | grep -a "ftdi_sio"

通过本文文章I成功地解决了这个问题.我的工作解决方案是在/etc/udev/rules.d/下创建两个文本文件.第一个从ftdi_sio驱动程序解除我的设备的绑定，第二个调整我的设备的权限.假设第一个与我的设备解除绑定的文件被命名为98-my-device.rules，并且具有以下内容:

By this article I succesfully overcame the problem. My working solution is to create two text files under the /etc/udev/rules.d/. The first unbinds my device from the ftdi_sio driver and the second adjusts the permissions for my device. Let assume the first file which unbinds my device is named to 98-my-device.rules and has the following content:

ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{product}=="FTDI Device",\
PROGRAM="/bin/sh -c '\
    echo -n $id:1.0 > /sys/bus/usb/drivers/ftdi_sio/unbind;\
    echo -n $id:1.1 > /sys/bus/usb/drivers/ftdi_sio/unbind\
'"

现在，假设第二个文件使我的设备无需root权限就可以使用，其名称为99-my-device.rules，并且具有以下内容:

Now let assume the second file which makes my device usable without root rights is named to 99-my-device.rules and has the following content:

ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{product}=="FTDI Device",\
MODE="0666"

这些规则将在下次重启时生效，或者可以通过以下方式应用:

These rules will be active from the next restart or they can be applied by:

sudo udevadm trigger

可以通过sudo lsusb -v命令获得设备的属性(供应商ID，产品ID和产品说明)，但这会显示过多信息.您可以使用以下内容过滤结果:

The device's attributes (vendor id, product id and the product description) can be obtained by the sudo lsusb -v command but this will show too much information. You can filter the results with something like this:

sudo lsusb -v | grep -a "Bus ... Device ...:\|idVendor\|idProduct\|iProduct"

成功阻止Linux为特定设备加载ftdi_sio驱动程序后，可以使用D2XX API.要从所有连接的设备中获取信息，请尝试使用《 D2XX程序员指南》中功能FT_GetDeviceInfoDetail的示例代码.

After you succesfully prevented the Linux to load the ftdi_sio driver for a specific device, you can use the D2XX API. To get informations from all connected devices try the example code of function FT_GetDeviceInfoDetail from the D2XX Programmer's Guide.

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