博客
关于我
iTOP4412开发板Drivermodule调试记录
阅读量:332 次
发布时间:2019-03-04

本文共 1289 字,大约阅读时间需要 4 分钟。

1.主要步骤

(1)hell world驱动程序:itop4412_hello.c

#include 
#include
MODULE_LICENSE("Dual BSD/GPL");MODULE_AUTHOR("TOPEET");static int hello_init(void){        printk(KERN_EMERG "Hello World enter!\n");        return 0;}static void hello_exit(void){        printk(KERN_EMERG "Hello World exit!\n");        return 0;}module_init(hello_init);module_exit(hello_exit);

(2)Makefile文件:Makefile

#!/bin/bashobj-m += itop4412_hello.oKDIR := /home/topeet/iTop4412_Kernel_3.0PWD ?= $(shell pwd)all:        make -C $(KDIR) M=$(PWD) modulesclean:        rm -rf *.o

(3)编译 make

(4)驱动模块验证:

加载模块:insmod itop4412_hello.ko

显示模块:lsmod

卸载模块:rmmod itop4412_hello

 

2.遇到问题

(1)Makefile发生笔误PWD写成pwd!

 make -C $(KDIR) M=$(PWD) modules

(2)Makefile的模块名称需要和*.c保持一致

我的报错提示如下:

make -C /home/topeet/iTop4412_Kernel_3.0 M=/home/drivermodule modulesmake[1]: Entering directory `/home/topeet/iTop4412_Kernel_3.0'make[2]: *** No rule to make target `/home/drivermodule/mini_linux_module.c', needed by `/home/drivermodule/mini_linux_module.o'.  Stop.make[1]: *** [_module_/home/drivermodule] Error 2make[1]: Leaving directory `/home/topeet/iTop4412_Kernel_3.0'make: *** [all] Error 2

将obj-m += mini_linux_module改为 obj-m += itop4412_hello.o!

(3)卸载模块时,模块名称不需要带.ko,比如

rmmod itop4412_hello     正确

rmmod itop4412_hello.ko  错误

转载地址:http://hiwh.baihongyu.com/

你可能感兴趣的文章
no available service ‘default‘ found, please make sure registry config corre seata
查看>>
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
查看>>
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named 'pandads'
查看>>
No module named cv2
查看>>
No module named tensorboard.main在安装tensorboardX的时候遇到的问题
查看>>
No module named ‘MySQLdb‘错误解决No module named ‘MySQLdb‘错误解决
查看>>