zynq下usb gadget模拟网口、U盘、串口(转)
作者：互联网
usb gadget 十分好用，可以模拟成网口、U盘、串口等。本文主要讲述如何将 usb gadget 模拟成网口、U盘、串口。
平台
主控芯片 ： XC7Z020
内核版本 ：Linux zynq 4.14.0-xilinx
配置
所需配置模块在内核 Device Drivers → USB support → USB Gadget Support 下，使用 usb gadget 时，将 zynq 作为外围设备，为从。
配置成网口
#!/bin/sh
do_start() {
insmod libcomposite.ko
insmod u_ether.ko
insmod usb_f_rndis.ko
mount -t configfs none /sys/kernel/config
mkdir /sys/kernel/config/usb_gadget/g1
cd /sys/kernel/config/usb_gadget/g1
echo "0x1d6b" > idVendor
echo "0x0104" > idProduct
echo "0x200" > bcdUSB
echo "0xEF" > bDeviceClass
echo "0x02" > bDeviceSubClass
echo "0x01" > bDeviceProtocol
echo "0x0100" > bcdDevice
mkdir -p strings/0x409
echo "0" > strings/0x409/serialnumber
echo `uname -r` > strings/0x409/manufacturer
echo `hostname -s` > strings/0x409/product
# Config
mkdir configs/c.1
mkdir -p configs/c.1/strings/0x409
echo "Config 1: RNDIS" > configs/c.1/strings/0x409/configuration
echo 250 > configs/c.1/MaxPower
echo 0xC0 > configs/c.1/bmAttributes
mkdir functions/rndis.0
# Windows extension to force RNDIS config
echo "1" > os_desc/use
echo "0xbc" > os_desc/b_vendor_code
echo "MSFT100" > os_desc/qw_sign
mkdir -p /functions/rndis.0/os_desc/interface.rndis
echo "RNDIS" > functions/rndis.0/os_desc/interface.rndis/compatible_id
echo "5162001" > functions/rndis.0/os_desc/interface.rndis/sub_compatible_id
# Set up the rndis device only first
ln -s functions/rndis.0 configs/c.1
ln -s configs/c.1 os_desc
echo "ci_hdrc.0" > UDC
ifconfig usb0 192.168.7.100
ifconfig usb0 up
}
do_stop() {
# 卸载usb网口
cd /sys/kernel/config/usb_gadget/g1
echo "" > UDC
rm os_desc/c.1/
rm configs/c.1/rndis.0/
rmdir configs/c.1/strings/0x409/
rmdir configs/c.1/
rmdir functions/rndis.0/
rmdir strings/0x409/
cd ..
rmdir g1/
rmmod u_ether.ko
rmmod usb_f_rndis.ko
rmmod libcomposite.ko
}
case $1 in
start)
echo "Start usb gadget"
do_start
;;
stop)
echo "Stop usb gadget"
do_stop
;;
*)
echo "Usage: $0 (stop | start)"
;;
esac
配置成U盘
#!/bin/sh
do_start() {
insmod libcomposite.ko
insmod usb_f_mass_storage.ko
dd bs=1M count=16 if=/dev/zero of=/tmp/lun0.img
mount -t configfs none /sys/kernel/config
mkdir /sys/kernel/config/usb_gadget/g1
cd /sys/kernel/config/usb_gadget/g1
echo "0x200" > bcdUSB
echo "0x100" > bcdDevice
echo "0x03FD" > idVendor
echo "0x0500" > idProduct
mkdir -p strings/0x409
echo "0" > strings/0x409/serialnumber
echo `uname -r` > strings/0x409/manufacturer
echo `hostname -s` > strings/0x409/product
mkdir -p functions/mass_storage.0
mkdir -p configs/c.1
echo 120 > configs/c.1/MaxPower
mkdir -p functions/mass_storage.0/lun.0
echo /tmp/lun0.img > functions/mass_storage.0/lun.0/file
echo 1 > functions/mass_storage.0/lun.0/removable
ln -s functions/mass_storage.0 configs/c.1
echo "ci_hdrc.0" > UDC
}
do_stop() {
# 卸载USB U盘
cd /sys/kernel/config/usb_gadget/g1
echo "" > UDC
rm configs/c.1/mass_storage.0/
rmdir configs/c.1/
rmdir functions/mass_storage.0/
rmdir strings/0x409/
cd ..
rmdir g1/
rmmod usb_f_mass_storage.ko
rmmod libcomposite.ko
}
case $1 in
start)
echo "Start usb gadget"
do_start
;;
stop)
echo "Stop usb gadget"
do_stop
;;
*)
echo "Usage: $0 (stop | start)"
;;
esac
配置成串口
#!/bin/sh
do_start() {
insmod libcomposite.ko
insmod u_serial.ko
insmod usb_f_serial.ko
insmod usb_f_acm.ko
mount -t configfs none /sys/kernel/config
mkdir /sys/kernel/config/usb_gadget/g1
cd /sys/kernel/config/usb_gadget/g1
echo "0x200" > bcdUSB
echo "0x100" > bcdDevice
echo "0x03FD" > idVendor
echo "0x0500" > idProduct
mkdir -p strings/0x409
echo "0" > strings/0x409/serialnumber
echo `uname -r` > strings/0x409/manufacturer
echo `hostname -s` > strings/0x409/product
mkdir -p functions/acm.gs0
mkdir -p configs/c.1
echo 120 > configs/c.1/MaxPower
ln -s functions/acm.gs0 configs/c.1/
echo "ci_hdrc.0" > UDC
}
do_stop() {
# 卸载USB串口
cd /sys/kernel/config/usb_gadget/g1
echo "" > UDC
rm configs/c.1/acm.gs0/
rmdir configs/c.1/
rmdir functions/acm.gs0/
rmdir strings/0x409/
cd ..
rmdir g1/
rmmod u_serial.ko
rmmod usb_f_serial.ko
rmmod usb_f_acm.ko
rmmod libcomposite.ko
}
case $1 in
start)
echo "Start usb gadget "
do_start
;;
stop)
echo "Stop usb gadget"
do_stop
;;
*)
echo "Usage: $0 (stop | start)"
;;
esac
参考
https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
https://github.com/STMicroelectronics/meta-st-openstlinux/blob/openstlinux-5.4-dunfell-mp1-20-06-24/recipes-bsp/tools/usbotg-gadget-config/stm32_usbotg_eth_config.sh
https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842272/Zynq+Linux+USB+Device+Driver
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版权声明：本文为CSDN博主「feitingfj」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/feitingfj/article/details/108520693
标签：0x409,usb,模拟网,c.1,gadget,echo,串口,configs 来源： https://www.cnblogs.com/arci/p/15360076.html