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RealPresence and Media Collaboration 專欄

insmod 載入驅動模組 也可以使用modprobe  載入驅動模組 例如:驅動模組為leds.ko, insmod leds.ko modprobe leds就可以了 這裡兩條命令的區別,還有區別就是modprobe會檢測與該驅動相關的模組,並自動載入相應需要的模組。 載入後,就需要建立裝置了, 可以使用的命令是mknod, 命令的格式是: mknod  裝置名   裝置型別(字元:c,塊:b)  主裝置號 從裝置號 例如; mknod  /dev/leds c 210 0  前提是要獲取正確的 主裝置號 從裝置號, 如果主裝置號 從裝置號不正確,雖然在/dev下可以看到建立的裝置,但如果open()會返回no device等錯誤. 如果在insmod or modprobe知道模組正確的主裝置號 從裝置號呢? 可以檢視 /proc/device 檔案的內容,例如: Character devices:
  1 mem
  4 /dev/vc/0
  4 tty
  5 /dev/tty
  5 /dev/console
  5 /dev/ptmx
  7 vcs Block devices:
259 blkext
  7 loop
  8 sd
 31 mtdblock
 65 sd
 66 sd
 67 sd 分別顯示字元裝置與塊裝置, 左邊是主裝置號,右邊的是裝置名。 這個裝置名就是你在驅動程式中 regiser_chrdev_region()或alloc_chrdev_region() 中指定的裝置名。 閱讀(771) | 評論(0) | 轉發(0) | 給主人留下些什麼吧!~~ 評論熱議

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RealPresence and Media Collaboration 專欄

insmod 載入驅動模組 也可以使用modprobe  載入驅動模組 例如:驅動模組為leds.ko, insmod leds.ko modprobe leds就可以了 這裡兩條命令的區別,還有區別就是modprobe會檢測與該驅動相關的模組,並自動載入相應需要的模組。

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