Linux驅動開發: Ubuntu(PC機)系統上編譯驅動並載入測試
阿新 • • 發佈：2021-01-04
一、環境介紹
作業系統: ubuntu18.04 64位
二、編寫Makefile(PC機)
先輸入uname -r命令檢視當前系統的版本.
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# uname -r
5.3.0-40-generic
檢視系統核心的路徑是否存在:
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/ linux-headers-5.3.0-40 linux-headers-5.4.0-53-generic linux-hwe-5.4-headers-5.4.0-47 linux-headers-5.3.0-40-generic linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-48 linux-headers-5.4.0-48-generic linux-hwe-5.4-headers-5.4.0-45 linux-hwe-5.4-headers-5.4.0-53
根據當前系統的版本，確定對應的路徑:/usr/src/linux-headers-5.3.0-40
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/ linux-headers-5.3.0-40 linux-headers-5.4.0-53-generic linux-hwe-5.4-headers-5.4.0-47 linux-headers-5.3.0-40-generic linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-48 linux-headers-5.4.0-48-generic linux-hwe-5.4-headers-5.4.0-45 linux-hwe-5.4-headers-5.4.0-53[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/linux-headers-5.3.0-40 arch certs Documentation fs init Kbuild kernel Makefile net scripts sound ubuntu virt block crypto drivers include ipc Kconfig lib mm samples security tools usr
完整的編寫Makefile如下：
Linux_ADD=/usr/src/linux-headers-5.3.0-40-generic
app_dev:
make -C $(Linux_ADD) M=`pwd` modules clean
make -C $(Linux_ADD) M=`pwd` modules
gcc spectrometer_app.c -o app
obj-m +=spectrometer_usb_drv.o
編譯安裝測試:
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# insmod spectrometer_usb_drv.ko
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# modinfo spectrometer_usb_drv.ko
filename: /mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu/spectrometer_usb_drv.ko
license: GPL
author: xiaolong
srcversion: 40F0CA1A1C1E3BA787F1B57
alias: usb:v0661p294Bd*dc*dsc*dp*ic*isc*ip*in*
alias: usb:v148Fp5370d*dc*dsc*dp*ic*isc*ip*in*
depends:
retpoline: Y
name: spectrometer_usb_drv
vermagic: 5.3.0-40-generic SMP mod_unload
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# rmmod spectrometer_usb_drv.ko 關於日誌顯示的問題: 驅動程式正常會使用printk向終端列印除錯資訊, 如果驅動安裝之後當前終端沒有反應，可以先使用dmesg命令檢視日誌裡是否有輸出。
[email protected]:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# dmesg
[137747.993110] 匯流排名稱:usb
[137747.993111] 端點號[0]:129
[137747.993111] 端點[0] 輸入端點(裝置到主機)
[137747.993112] 端點[0] 裝置支援批量傳輸.
[137747.993112] 端點[0] 傳輸的資料大小:512
[137747.993112] probe:dev->bulk_in_endpointAddr=129
[137747.993113] 端點號[1]:1
[137747.993113] 端點[1] 輸出端點(主機到裝置)
[137747.993113] 端點[1] 裝置支援批量傳輸.
[137747.993114] 端點[1] 傳輸的資料大小:512
[137747.993114] probe:dev->bulk_out_endpointAddr=1
[137747.993114] 端點號[2]:2
[137747.993115] 端點[2] 輸出端點(主機到裝置)
[137747.993115] 端點[2] 裝置支援批量傳輸.
[137747.993115] 端點[2] 傳輸的資料大小:512
[137747.993115] 端點號[3]:3
[137747.993116] 端點[3] 輸出端點(主機到裝置)
[137747.993116] 端點[3] 裝置支援批量傳輸.
[137747.993116] 端點[3] 傳輸的資料大小:512
[137747.993116] 端點號[4]:4
[137747.993116] 端點[4] 輸出端點(主機到裝置)
[137747.993117] 端點[4] 裝置支援批量傳輸.
[137747.993117] 端點[4] 傳輸的資料大小:512
[137747.993157] USB光譜儀裝置節點註冊成功:/dev/spectrometer_usb_drv ,主裝置號:10,次裝置號:53
[137747.993173] usbcore: registered new interface driver spectrometer_usb_drv
三、順便說下嵌入式Linux驅動Makefile編譯方式
Linux_ADD=/home/wbyq/work/linux-3.5/linux-3.5
app_dev:
make -C $(Linux_ADD) M=`pwd` modules clean
make -C $(Linux_ADD) M=`pwd` modules
cp *.ko /home/wbyq/project/ -fv
arm-linux-gcc spectrometer_app.c -o app
cp app /home/wbyq/project/ -fv
obj-m +=spectrometer_usb_drv.o