转：Linux设备驱动程序学习

js001sdx

学习

longhaihai

感谢楼主

hpu330

XIEXIE LE HEH

xy598646744

不错！

2012拾忆

有几种方法：
1.在drivers/char/Makefie中增加一行
obj-m        +=helloworld.o
然后在重新编译内核，但是只需要编译make modules，只编译内核模块，然后就产生.ko文件，加载运行即可

2.在网上找个Makefile编译一下，也可产生模块文件.ko，再加载

3.在drivers/char/Makefie中增加一行
obj-y        +=helloworld.o
重新编译内核，则helloworld就是直接编译入内核。。。。。。。。。。。。。。。。。

2012拾忆

补充，前两种方法，吧helloworld.c放在文件linux/driver/char目录下

bbxyliyang

你好，你搞过usb驱动吗？我有问题向你请教？你QQ多少？谢谢了
   

kaikai1013

写个Makefile啊！
-----------------------------
2 # To build modules outside of the kernel tree, we run "make"
  3 # in the kernel source tree; the Makefile these then includes this
  4 # Makefile once again.
  5 # This conditional selects whether we are being included from the
  6 # kernel Makefile or not.
  7 ifeq ($(KERNELRELEASE),)
  8
  9     # Assume the source tree is where the running kernel was built
10     # You should set KERNELDIR in the environment if it's elsewhere
11     KERNELDIR ?= /lib/modules/$(shell uname -r)/build
12     # The current directory is passed to sub-makes as argument
13     PWD := $(shell pwd)
14
15 modules:
16     $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
17
18 modules_install:
19     $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
20
21 clean:
22     rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
23
24 .PHONY: modules modules_install clean
25
26 else
27     # called from kernel build system: just declare what our modules are
28     obj-m := helloworld.o
29
30 endif
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tulip0425

这是真的吗？太好了，谢谢您啊

你牛克斯

很好的指导建议，很好的方针路线！