开发板: TQ2440
1. hello.c
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#include <linux/init.h>
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#include <linux/module.h>
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MODULE_LICENSE("GPL");
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static int __init hello_init(void)
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{
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printk(KERN_ALERT "my first driver\n");
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return 0;
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}
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static void __exit hello_exit(void)
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{
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printk(KERN_ALERT "goodbye my first dirver\n");
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return ;
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}
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module_init(hello_init);
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module_exit(hello_exit);
2. Makefile
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#CROSS_COMPILE=/opt/EmbedSky/4.3.3/bin/arm-none-linux-gnueabi-
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CROSS_COMPILE= /opt/EmbedSky/4.3.3/bin/arm-none-linux-gnueabi-
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ARCH:=arm
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CC=$(CROSS_COMPILE)gcc
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LD=$(CROSS_COMPILE)ld
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obj-m = hello.o
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KDIR =/root/kernel/linux-2.6.30.4
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PWD = $(shell pwd)
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default:
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$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
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clean:
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rm -f *.ko *.o *.mod.o *.mod.c *.symvers *.order
hello.rar(下载后将文件名改为hello.tar.gz)
3. 当需要在x86 和 arm上相互切换驱动时,不需要写两套Makefile,只需要加一个类型判断即可。
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ARCH=x86
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ifeq ($(ARCH), x86)
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CROSS_COMPILE=
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KDIR = /lib/modules/$(shell uname -r)/build
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else
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CROSS_COMPILE= /opt/EmbedSky/4.3.3/bin/arm-none-linux-gnueabi-
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KDIR =/root/kernel/linux-2.6.30.4
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endif
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PWD = $(shell pwd)
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obj-m := hello.o
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all:
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make -C $(KDIR) SUBDIRS=$(PWD) modules
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clean:
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rm -f *.ko *.o *.mod.o *.mod.c *.symvers *.order
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