將usb做從機，hid通信操作（模擬串口，模擬u盤，hid通信...）

內核設定

1-模擬u盤

2.模擬串口
?

3.hid通信?

?

?????????

1.報錯：

# insmod libcomposite.ko
[ ? 88.529791] libcomposite: Unknown symbol usb_udc_attach_driver (err 0)
[ ? 88.536358] libcomposite: Unknown symbol usb_gadget_probe_driver (err 0)
[ ? 88.545108] libcomposite: Unknown symbol usb_gadget_ep_match_desc (err 0)
[ ? 88.552383] libcomposite: Unknown symbol usb_gadget_set_state (err 0)
[ ? 88.560708] libcomposite: Unknown symbol usb_gadget_unregister_driver (err 0)
insmod: can't insert 'libcomposite.ko': unknown symbol in module, or unknown parameter
#
#
#
# insmod configfs.ko
[ ? 96.653566] configfs: exports duplicate symbol config_group_find_item (owned by kernel)
insmod: can't insert 'configfs.ko': invalid module format
#
# insmod libcomposite.ko
[ ?101.661141] libcomposite: Unknown symbol usb_udc_attach_driver (err 0)
[ ?101.667983] libcomposite: Unknown symbol usb_gadget_probe_driver (err 0)
[ ?101.674674] libcomposite: Unknown symbol usb_gadget_ep_match_desc (err 0)
[ ?101.684324] libcomposite: Unknown symbol usb_gadget_set_state (err 0)
[ ?101.691233] libcomposite: Unknown symbol usb_gadget_unregister_driver (err 0)
insmod: can't insert 'libcomposite.ko': unknown symbol in module, or unknown parameter

?

根源：配置出錯

2.報錯：can't insert 'g_hid.ko': No such device

?# insmod g_hid.ko
insmod: can't insert 'g_hid.ko': No such device
根源：缺少補丁
見分析：http://blog.chinaunix.net/uid-26418332-id-5107484.html

3.單獨配置和編譯Linux的驅動driver下某個模塊，或者更新某個模塊的ko文件：

先cd到具體的目錄下，然后輸入指令；
make -C /home/user/NUC970_Buildroot-master/output/build/linux-master M=`pwd` modules

總結

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