gec6818蜂鸣器LED内核模块文件下载（驱动） 28.93KB

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资源文件列表:

beep.zip 大约有3个文件

beep/buz_test.c 497B
beep/gec6818_beep.c 4.04KB
beep/gec6818_beep.ko 60.95KB

资源介绍:

gec6818蜂鸣器LED内核模块文件下载（驱动）

#include <linux/module.h> #include <linux/kernel.h> #include <linux/cdev.h> #include <linux/uaccess.h> #include <linux/fs.h> #include <linux/ioport.h> #include <linux/io.h> #include <linux/miscdevice.h> #include <linux/ioctl.h> #include <linux/delay.h> #include <linux/gpio.h> #include <cfg_type.h> #define DEVICE_NAME "beep" //�豸�� #define BUZZER_GPIO (PAD_GPIO_C + 14) //�ܽź� //#define BUZ_ON _IOW('B', 1, unsigned long) //#define BUZ_OFF _IOW('B', 0, unsigned long) //struct cdev /************************************************* *��ƺ�� *cmd ��÷��״̬ 1 ---off 0 ----on *args ��÷��Ĺܽ� *************************************************/ //static long test_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long args) static long test_ioctl(struct file *file, unsigned int cmd, unsigned long args) { if(args!=1) { printk("the args is out of range 1 \n"); return -EINVAL; } switch(cmd){ case 1: gpio_set_value(BUZZER_GPIO, 0); //off��ù̵ܽ�ֵ0 printk("cmd = 0 , args=%ld\n", args); break; case 0: gpio_set_value(BUZZER_GPIO, 1) ; //on��ù̵ܽ�ֵ1 printk("cmd = 1 , args=%ld\n", args); break; default: printk("the cmd is out of range(0,1) \n"); return -EINVAL; break; } return 0; } /************************************************* *�ļ�� *************************************************/ static const struct file_operations chrdev_fops = { .owner = THIS_MODULE, .unlocked_ioctl = test_ioctl, }; /************************************************* *��豸 *************************************************/ static struct miscdevice buz_misc = { .minor = MISC_DYNAMIC_MINOR, .name = DEVICE_NAME, .fops = &chrdev_fops, }; /******************************************************************** *��ĳ�ʼ��--->��ں��Դ��ںˡ��жϡ��豸�š��....�� ********************************************************************/ static int __init gec6818_buzzer_init(void) { int ret; ret = gpio_request( BUZZER_GPIO , "BUZZER"); //gpio�ܽ�� if(ret <0) { printk("EXYNOS6818_GPX3(5) can not request \n" ); goto fail_gpio_request; } gpio_direction_output( BUZZER_GPIO, 0); //��GPIO��Ϊ��"0" ret = misc_register(&buz_misc); //�Զ��豸�ļ� if(ret <0){ printk("can not register buz_misc \n"); goto err_misc_register; } return 0; //��ע��ɹ��0��ע��ʧ�ܣ��һ�� //�� err_misc_register: fail_gpio_request: gpio_free(BUZZER_GPIO); return ret; } /***************************************************************** *��˳�� --->��Դ��ں� *****************************************************************/ static void __exit gec6818_buzzer_exit(void) { gpio_free(BUZZER_GPIO); misc_deregister(&buz_misc); printk("the driver is exiting!\n"); } module_init(gec6818_buzzer_init); //��ں��һ��û��ĳ�ʼ�� module_exit(gec6818_buzzer_exit); //��ĳ��ں��һ��û��˳�� //��Ϣ�� #modinfo *.ko , ��Ϣ��Ǳ��ġ� MODULE_AUTHOR("ZOROE@GEC"); //�� MODULE_DESCRIPTION("Buzzer of driver"); //�� MODULE_LICENSE("GPL"); //��ѭ��Э��

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