linux下led小灯的驱动

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1、我第一个字符设备驱动程序的痛苦经历2009-12-2621:07写驱动程序是个痛苦成长的过程。。。对驱动的编译，先要有支持的内核源码树，所以先得编译内核。由于过了两天才来整理，写的东西有点杂乱了。1.按照那个入门设备驱动程序，来编译的时候老是错误，网络上有个参考的（blog.csdn.net/sabalol/archive/2008/02/01/2076610.aspx），但是他有一个严重的错误：编译linux源码的路径不对。他的错误如下：[liu@liu-desktophellomod]#makeoldconfig[liu@liu-desktophellomod]#m

2、akeprepare应该是：[root@liu-desktoplinux26]#makeoldconfig[root@liu-desktoplinux26]#makeprepare2.我下了linux内核后，直接make出现如下错误：[root@localhostmy_drivers]#makemake-C/home/xinghun/linux-2.6.30.4M=/home/xinghun/my_driversmodulesmake[1]:Enteringdirectory`/home/xinghun/linux-2.6.30.4'ERROR:Kernelconfig

3、urationisinvalid.        include/linux/autoconf.horinclude/config/auto.confaremissing.        Run'makeoldconfig&&makeprepare'onkernelsrctofixit.make[1]:***[include/config/auto.conf]Error1make[1]:Leavingdirectory`/home/xinghun/linux-2.6.30.4'make:***[default]Error2解决办法：红色部分（在linux内核目录下执行红

4、色部分代码）[root@localhostlinux-2.6.30.4]#makepreparescripts/kconfig/conf-sarch/arm/KconfigCHK    include/linux/version.hUPD    include/linux/version.hGeneratinginclude/asm-arm/mach-types.hCHK    include/linux/utsrelease.hUPD    include/linux/utsrelease.hSYMLINKinclude/asm->include/asm-armCC 

5、    kernel/bounds.sGEN    include/linux/bounds.hCC     arch/arm/kernel/asm-offsets.sGEN    include/asm/asm-offsets.hCALL   scripts/checksyscalls.sh:1097:2:warning:#warningsyscallfadvise64notimplemented:1265:2:warning:#warningsyscallmigrate_pagesnotimplemented:1321:2:

6、warning:#warningsyscallpselect6notimplemented:1325:2:warning:#warningsyscallppollnotimplemented:1365:2:warning:#warningsyscallepoll_pwaitnotimplemented[root@localhostlinux-2.6.30.4]#看见几个warning很不爽，解决办法：make下内核就不会出现了。3.出现MODPOST1modules/bin/sh:scripts/mod/modpost:notfound错误的

7、解决办法：[root@localhostlinux-2.6.30.4]#makescriptsCC     scripts/mod/empty.oHOSTCCscripts/mod/mk_elfconfigMKELF  scripts/mod/elfconfig.hHOSTCCscripts/mod/file2alias.oHOSTCCscripts/mod/modpost.oHOSTCCscripts/mod/sumversion.oHOSTLDscripts/mod/modpostHOSTCCscripts/kallsymsHOSTC