未检测到 FTDI 设备
[英]FTDI Device not detected
问题描述
After connecting an FTDI device to the USB port, FT_OpenEx() returns an error code 2 which is FT_DEVICE_NOT_FOUND .
将 FTDI 设备连接到 USB 端口后， FT_OpenEx()返回错误代码 2，即FT_DEVICE_NOT_FOUND 。 However on running "lsusb" in the terminal, the FTDI device does show up.然而，在终端中运行“lsusb”时，FTDI 设备确实出现了。 What is causing FT_Open_Ex() to return FT_DEVICE_NOT_FOUND if the device is listed by lsusb?如果设备由 lsusb 列出，是什么导致FT_Open_Ex()返回FT_DEVICE_NOT_FOUND ？ What are the possible issues and solutions?可能的问题和解决方案是什么？
Output of lsusb: lsusb的输出：
Bus 001 Device 003: ID 0bda:5776 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Output of dmesg | dmesg 的输出 | grep FTDI : grep FTDI：
[28153.244220] usbserial: USB Serial support registered for FTDI USB Serial Device
[28153.244260] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[28153.244509] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
Output of dmesg | dmesg 的输出 | grep -i FTDI: grep -i FTDI：
[28153.244206] usbcore: registered new interface driver ftdi_sio
[28153.244220] usbserial: USB Serial support registered for FTDI USB Serial Device
[28153.244260] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[28153.244509] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
2 个解决方案
解决方案1
2 2020-08-27 15:31:11
After connecting an FTDI device to the USB port, FT_OpenEx() returns an error code 2 which is FT_DEVICE_NOT_FOUND .将 FTDI 设备连接到 USB 端口后， FT_OpenEx()返回错误代码 2，即FT_DEVICE_NOT_FOUND 。 However on running "lsusb" in the terminal, the FTDI device does show up.但是，在终端中运行“lsusb”时，FTDI 设备确实出现了。 What is causing FT_Open_Ex() to return FT_DEVICE_NOT_FOUND if the device is listed by lsusb?如果 lsusb 列出了设备，是什么导致FT_Open_Ex()返回FT_DEVICE_NOT_FOUND ？ What are the possible issues and solutions?可能出现的问题和解决方案是什么？
Output of lsusb: lsusb 的输出：
Bus 001 Device 003: ID 0bda:5776 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Output of dmesg | dmesg 的输出 | grep FTDI : grep FTDI :
[28153.244220] usbserial: USB Serial support registered for FTDI USB Serial Device
[28153.244260] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[28153.244509] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
Output of dmesg | dmesg 的输出 | grep -i FTDI: grep -i FTDI：
[28153.244206] usbcore: registered new interface driver ftdi_sio
[28153.244220] usbserial: USB Serial support registered for FTDI USB Serial Device
[28153.244260] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[28153.244509] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
解决方案2
0 2018-03-16 16:35:38
One possible issue: 一个可能的问题：
If you have no root permissions while using the program (which uses the FT_OpenEx function) you get error code 2 如果您在使用程序（使用FT_OpenEx函数）时没有root权限，则会收到错误代码2
Solution to this specific issue: 解决此特定问题的方法：
sudo ./"your FT program"
解决方案3
0 2022-01-07 15:56:03
Do you have read/write permissions on the device?您对设备有读/写权限吗？ can you try sudo chmod 666 /dev/ttyUSB0你能试试 sudo chmod 666 /dev/ttyUSB0
to make this permanent make a udev rule使此永久生效 制定 udev 规则
create this file /etc/udev/rules.d/99-ftdi.rules创建此文件 /etc/udev/rules.d/99-ftdi.rules
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS={idProduct}=="6001"
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