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ÔÚ¼üÅÌÇý¶¯´úÂë·ÖÎöµÄ±Ê¼ÇÖУ¬½Ó´¥µ½ÁËinput×Óϵͳ.¼üÅÌÇý¶¯£¬¼üÅÌÇý¶¯½«¼ì²âµ½µÄËùÓа´¼ü¶¼Éϱ¨¸øÁËinput×Óϵͳ¡£Input×ÓϵͳÊÇËùÓÐI/OÉ豸Çý¶¯µÄÖмä²ã£¬ÎªÉϲãÌṩÁËÒ»¸öͳһµÄ½çÃæ¡£ÀýÈ磬ÔÚÖÕ¶ËϵͳÖУ¬ÎÒÃDz»ÐèҪȥ¹ÜÓжàÉÙ¸ö¼üÅÌ£¬¶àÉÙ¸öÊó±ê¡£ËüÖ»Òª´Óinput×ÓϵͳÖÐȥȡ¶ÔÓ¦µÄʼþ(°´¼ü£¬Êó±êÒÆλµÈ)¾Í¿ÉÒÔÁË¡£½ñÌì¾Í¶Ôinput×Óϵͳ×öÒ»¸öÏ꾡µÄ·ÖÎö. 
ÏÂÃæµÄ´úÂëÊÇ»ùÓÚlinux kernel 2.6.25.·ÖÎöµÄ´úÂëÖ÷ҪλÓÚkernel2.6.25/drivers/inputÏÂÃæ. 
¶þ£ºÊ¹ÓÃinput×ÓϵͳµÄÀý×Ó 
ÔÚÄÚºË×Ô´øµÄÎĵµDocumentation/input/input-programming.txtÖС£ÓÐÒ»¸öʹÓÃinput×ÓϵͳµÄÀý×Ó£¬²¢¸½´øÏàÓ¦µÄ˵Ã÷¡£ÒÔ´ËΪÀý·ÖÎöÈçÏ£º 
#include <linux/input.h> 
#include <linux/module.h> 
#include <linux/init.h> 
  
#include <asm/irq.h> 
#include <asm/io.h> 
  
static void button_interrupt(int irq, void *dummy, struct pt_regs *fp) 

        input_report_key(&button_dev, BTN_1, inb(BUTTON_PORT) & 1); 
        input_sync(&button_dev); 

  
static int __init button_init(void) 

        if (request_irq(BUTTON_IRQ, button_interrupt, 0, "button", NULL)) { 
                printk(KERN_ERR "button.c: Can't allocate irq %d\n", button_irq); 
                return -EBUSY; 
        } 
  
        button_dev.evbit[0] = BIT(EV_KEY); 
        button_dev.keybit[LONG(BTN_0)] = BIT(BTN_0);&n


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