Anew device driver for a video frame grabber一个视频帧捕获一个新的设备驱动程序

1、a new device driver for a video frame grabberbinh tran lucie ngnepieba term project kernel device summer 2006outline1.overview2.our goalsoverview isa greyscale cardpci color cardgoals to compile correctly on the linux distribution 2.6.16 to improve the previous video frame grabber device driver to s

2、upport video4linux. to integrate the previous driver and make it work on both grayscale and color support.to work on the low-level operation of the frame grabber to support the new interrupt-driven i/o feature (if time permits).previous students workstaken from the previous students journal (atulya

3、mahajan, huan keat (sean) toh):our achievements our device driver is stable with the 2.6.16.14 kernel works properly, consistently without errors( ie load module, unload module , auto-detect different devices, no kernel panic) (goal #1) our driver supports video4linux (goal #2) we improve the previe

4、w driver to support both grey scale and color cards (goal #3)problems found in the original device driver and our solutions1.when compiled and executed the hrt module was loaded, but:(cont)sol: switched the two cards, reboot, and load module again. it works. we diagnose the cards slots are sensitive

5、. moreover, sysfs is not a main issue. (cont)5.missing libraries needed for video4linuxwhat we have learnedlearn how to build a driver for many different cards, especially video cards, in a kernel on linux distribution 2.6learn how to dissect the long source code(65 pages with more than 3700 lines o

6、f codes)learn how to debug subtle errorsimprove how to use the following techniqueschar device drivermemory mapped i/ointernal mutual exclusion (spinlocks and semaphores)use of ioclsinterrupt & timer management (tasklets and kernel timer api) learn more about linux like making a make file, etcworks leftthe color display for different resolutions still needs to be doneto work on the low-level operation of the frame grabber to support th