• zynq下usb gadget模拟网口、U盘、串口(转)


    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

    ————————————————

    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

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  • 原文地址:https://www.cnblogs.com/arci/p/15360076.html
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