| Experiment No. |
Design special courses four |
topic |
Device Drivers |
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| Purpose |
1. Concept 2. Design 3. implementation - coding 4. realization - compiled debugging |
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| Content Experiments |
Perfect example of a program character device, so as to meet the following functions: . I mounting device reads out the character string from the device number for your school; . Ii device supports every write characters not more than 1,024, the excess is discarded; . Iii latest user can read characters written to the device; . Iv not be opened before the device turns off a plurality of times; . V equipment support system calls ioctl (int d, int req, ...), req = 0x909090, remove the string written device; Write your own test program to verify the above function |
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| Report Content Requirements |
(1) program implements methods and ideas (2) testing and results |
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| Report Text |
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| (1)
Compile 2.4: gcc -c rwbuf.c -I/usr/src/linux/include -D__KERNEL__ -DMODULE -Wall 2.6: Create Makefile, which reads: obj-m := rwbuf.o Then use: Into the driver source code directory, execute: make -C kernel source directory M = `pwd` modules Installation and uninstallation: 2.4: insmod rwbuf.o install device drivers 2.6 insmod rwbuf.ko / Sbin / rmmod rwbuf unload device drivers
(2)
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Reproduced in: https: //www.cnblogs.com/ku1274755259/p/11108908.html