mini2440上LEDS的驱动程序（含测试程序）

1、mini2440上leds的驱动程序（含测试程序）ls_drv.h ifndef _memdev_h_ define _memdev_h_ ilude linux/ioctl.h /* 定义幻数 */ define memdev_ioc_magic 'k' /* 定义 */ define memdev_ioc_on _io(memdev_ioc_magic, 1) define memdev_ioc_off _io(memdev_ioc_magic, 2) define memdev_ioc_maxnr 2 define led_on 0 define led_off 1 en

2、dif /* _memdev_h_ */leds_drv.c include linux/misevice.h include linux/delay.h include asm/irq.h include mach/regs-gpio.h include mach/hardware.h include linux/kernel.h include linux/miscdevice.h include linux/delay.h include asm/irq.h include mach/regs-gpio.h include mach/hardware.h include linux/ke

3、rnel.h include linux/mole.h include linux/init.h include linux/mm.h include linux/fs.h include linux/types.h include linux/delay.h include linux/moduleparam.h include linux/slab.h include linux/errno.h include linux/ioctl.h include linux/cdev.h include linux/sing.h include linux/list.h include linux

4、/pci.h include linux/gpio.h include asm/uaccess.h include asm/atomic.h include asm/unistd.h include leds_drv.h define device_name leds ic unsigned long led_table = s3c2410_gpb(5), s3c2410_gpb(6), s3c2410_gpb(7), s3c2410_gpb(8), static unsigned int led_cfg_table = s3c2410_gpio_output, s3c2410_gpio_ou

5、tput, s3c2410_gpio_output, s3c2410_gpio_output, static int s3c2440_leds_ioctl(struct inode *inode, struct *file, unsigned int cmd, unsigned long arg) /* 检测指令的有效性 */ if (_ioc_type(cmd) != memdev_ioc_magic) return -einval; if (_ioc_nr(cmd) memdev_ioc_maxnr) return -einval; /* 按照指令，执行相应的操作 */ switch (c

6、md) case memdev_ioc_off: s3c2410_gpio_pin(led_tablearg, led_off); return 0; case memdev_ioc_on: s3c2410_gpio_setpin(led_tablearg, led_on); return 0; default: return -einval; /*文件操作结构体*/ static struct file_operations dev_fops = .owner = this_module, .ioctl = s3c2440_leds_ioctl, static struct miscdevi

7、ce misc = .minor = misc_dynamic_minor, .name = device_name, .fops = dev_fops, static int _init dev_init(vo) int ret; int i; /*设置gpio控制寄存器，gpio设置为输出模式,默认下灯全灭 */ for (i = 0; i i+) s3c2410_gpio_cfgpin(led_tablei, led_cfg_tablei); s3c2410_gpio_setpin(led_tablei, 1); /*注册混杂型字符设备驱动 */ ret = misc_register(

8、 misc); printk(device_name tinitializedn return ret; static void _it dev_exit(void) /*注销混杂型字符设备驱动 */ misc_deregister( misc); module_init(dev_init); module_exit(dev_exit); module_author( cried devil module_license( gpl app-leds.c include stdio.h include stdlib.h include unistd.h include sys/ioctl.h i

9、nclude leds_drv.h /* 包含指令定义 */ int main(int argc, char *argv) int on; int fd; int num; if (argc != 3 | sscanf(argv1, %d , num) != 1 | sscanf(argv2, %d , on) != 1 | on 0 | on 1 | num 0 | num 3) fprintf(stderr, usage: %s led_num off|onn , argv0); fprintf(stderr, usage: %s 0|1|2|3 0|1n , argv0); fprint

10、f(stderr, ex : %s 0 1n , argv0); exit(1); fd = open( /dev/leds , 0); if (fd 0) perror( open device leds exit(1); if (on) / printf( turn on led %d!n , num); ioctl(fd, memdev_ioc_on, num); ee / printf( turn off led %d!n , num); ioctl(fd, memdev_ioc_off, num); close(fd); return 0; makefile ifneq ($(ker

11、nelrelease),) obj-m := leds_drv.o kdir := /home/youshan/linux- myapp := app-leds make -c $(kdir) m=$(pwd) modules arch=a cross_compile=arm-linux- arm-linux-gcc $(myapp).c -o $(myapp) clean: rm -f *.ko *.o *.mod.o *.mod.c *.syers modul* rm -f $(myapp) endif 编译结果： rootshiguang leds rootshiguang leds make make -c /home/youshan/linux- m=/home/my_project/temperature/leds modules arch=arm cross_compile=arm-linux- make1: 进入名目“/home/youshan/linux-” cc m /home/my_project/temperature/leds/leds_drv.o building modules, stage 2. modpost 1 modules cc /home/my_project/te