Linux¼üÅÌÇý¶¯·¶Àý
¼üÅÌÔÚËùÓеÄÇý¶¯Ö®ÖÐ×îΪ¼òµ¥µÄÒ»ÖÖ£¬µ«ËüÈ´°üº¬ÁËÇý¶¯µÄ»ù±¾¿ò¼Ü£¬¶ÔÒÔºó¼ÌÐøÉîÈëѧϰÆäËû¸´ÔÓµÄÇý¶¯´óÓÐñÔÒæ£¬ÒÔϱãΪÄãÖð²½ÆÊÎöÇý¶¯µÄ¿ª·¢¡£²ÉÓõÄÊDzéѯ·½Ê½¡£×ªÔØÇë×¢Ã÷³ö´¦£ºqiangren.blog.edu.cn
Ò».ÄÚºËÄ£¿éµÄ×¢²áºÍ³·Ïú
ÔÚ¼ÓÔØÄ£¿éµÄʱºò£¬Ê×ÏÈÔËÐеÄÊÇÄÚºËÄ£¿éµÄ×¢²áº¯Êý¡£ËüµÄ¹¦ÄܰüÀ¨ÄÚºË×¢²áÉ豸ÒÔ¼°±äÁ¿µÄ³õʼ»¯¡£
static int head,tail;
int _init Keypad_init(void)
{
int result;
result=register_chrdev(KEY_LED_MAJOR,KEY_LED_NAME,&Keypad_fops);
Keypad_clear();
init_waitqueue_head(&queue);
prink("%s %s initialized.\n",KEY_LED_NAME,KEY_LED_VERSION);//²»ÄÜÓÃprinf
return 0;
}
module_init(Keypad_init);//¼ÓÔØÄ£¿é
void _exit Keypad_cleanup(void)
{
del_timer(&timer);
unregister_chrdev(KEY_LED_MAJOR,KEY_LED_NAME);
prink("Keypad driver removed \n");
}
module_exit(Keypad_cleanup);//Ð¶ÔØ¸ÃÄ£¿é
¶þ.ÐéÄâÎļþϵͳÓëÓ²¼þÇý¶¯µÄ½Ó¿Ú
static struct file_operations Keypad_fops={
open:Keypad_open,
read:Keypad_read,
poll:Keypad_poll,
fasync:Keypad_fasync,
release:Keypad_release,
};
¸Ã½Ó¿Ú¶¨ÒåÍêÖ®ºóһЩ±ãÊǶÔÕ⼸¸ö¾ßÌ庯ÊýµÄʵÏÖÁË£¡ÏÖÔÚÎÒÃÇÒ»Æð½øÈëÏÂÒ»²½°É£¬ÊDz»ÊǾõµÃÆäʵûʲôÄѶȵÄÄØ£¿±ðÄÇôÔ翪ÐÄ×ÅÄØ£¿Õ⼸¸öº¯ÊýµÄʵÏÖʱºò£¬Éæ¼°µ½ºÜ¶à¼¼Êõ£¬°üÀ¨Äں˶¨Ê±Æ÷£¬*µÈ´ý¶ÓÁеľßÌåʵÏÖ£¨×èÈû·½Ê½£©£¬Òì²½·½Ê½µÄ¾ßÌåʵÏÖ¼¼ÇÉ£¬Ñ»·¶ÓÁС£¿´µ½Õâô¶à¼¼ÊõÄãÊÇ·ñ¸Ðµ½ºÜÐË·ÜÄØ£¿ÒÔϱ¾È˽«ÒÔͨË׵ķ½Ê½ÎªÄã½²½â£¬Ï£ÍûÄãÄÜÀí½â¡£
Èý.É豸µÄ´ò¿ª²Ù×÷½Ó¿Úº¯Êý¾ßÌåʵÏÖ£¨Keypad_open)
É豸´ò¿ªÒ»°ã°üÀ¨Á½´ó²Ù×÷£¬Ò»ÊÇÍê³ÉÉ豸µÄ³õʼ»¯£¬¶þÊÇÉ豸ÒýÓüÆÊýÆ÷¼Ó1
static int Keypad_open(struct inode *inode,struct file *filp)
{
read_xy();
try_module_get(THIS_MODULE);//´Ëº¯ÊýΪLinux 2.6ÄÚºËÔö¼ÓµÄ£¬²»Í¬ÓÚ2.4Äںˣ¬¹¦ÄÜÊǼÆÊýÆ÷µÄÖµ¼Ó1
return 0;
}
static void read_xy(void)
{
&nbs
Ïà¹ØÎĵµ£º
Linux»·¾³ÏµÄÈí¼þ°²×°£¬²¢²»ÊÇÒ»¼þÈÝÒ×µÄÊÂÇ飻Èç¹ûͨ¹ýÔ´´úÂë±àÒëºóÔÚ°²×°£¬µ±È»ÊÂÇé¾Í¸üΪ¸´ÔÓһЩ£»ÏÖÔÚ°²×°¸÷ÖÖÈí¼þµÄ½Ì³Ì¶¼·Ç³£ÆÕ±é£»µ«Íò±ä²»ÀëÆäÖУ¬¶Ô»ù´¡ÖªÊ¶µÄÔúÊµÕÆÎÕ£¬°²×°¸÷ÖÖÈí¼þµÄÎÊÌâ¾ÍÓÈжø½âÁË¡£Configure½Å±¾ÅäÖù¤¾ß¾ÍÊÇ»ù´¡Ö®Ò»£¬ËüÊÇautoconfµÄ¹¤¾ßµÄ»ù±¾Ó¦Óá£
ÓëһЩ¼¼ÇÉÏà±È£¬ConfigureÏԵûù´ ......
µÝ¹é²éÕÒÎļþÄÚÈÝ£º
grep -n -ri "slewing" ./
ÔÚµ±Ç°Ä¿Ïµݹé²éÕÒËùÓеÄÎļþ
-i, --ignore-case
Ignore case distinctions  ......
¡¡¼¸¸ö¼òµ¥µÄÓ¦Óá£
¡¡¡¡1¡¢ÅúÁ¿Í¼Ïñ¸ñʽת»»
¡¡¡¡Èç¹ûÏ뽫ijĿ¼ÏµÄËùÓÐjpgÎļþת»»ÎªpngÎļþ£¬Ö»ÒªÔÚÃüÁîÐÐģʽÏÂÊäÈë:
¡¡¡¡for %f in (*.jpg) do convert “%f” “%~nf.png”
¡¡¡¡2¡¢¶ÔËùÓÐͼÏñ½øÐÐͬһ²Ù×÷
¡¡¡¡Æ©È磬ÅúÁ¿Éú³ÉijĿ¼ÏÂËùÓÐPNGͼÏñÎļþµÄËõÂÔͼ(´óСΪ80×40):
¡¡¡¡fo ......
http://dbus.freedesktop.org/doc/dbus-tutorial.html
D-Bus Tutorial
Havoc
Pennington
Red Hat, Inc.
<hp@pobox.com
>
David
Wheeler
John
Palmieri
Red Hat, Inc.
<johnp@redhat.com
>
Colin
Walters
Red Hat, Inc.
<walters@redhat.com
>
Version 0.5.0
Table of Contents
......
ÒýÓà 2 Â¥ cokeliu µÄ»Ø¸´:
лл! ÇëÎÊÊÇ·ñÿµ÷ÓÃÒ»´Îtasklet_schedule(B task); B taskÈÎÎñ±»¼Óµ½Á´±íÉÏÖ»»á±»Ö´ÐÐÒ»´Î?
Êǵģ¬Ö»±»¼ÓÒ»´Î
µÚÒ»´Îtasklet_schedule(B task)¸øËûÒ»¸ö״̬TASK_STATE_SCHED
×÷±ê¼Ç£¬ÒÔºóµÄtasklet_schedule(B task)»á¼ì²éÕâ¸ö±ê¼Ç
http://os.inf.tu-dresden.de/l4env/doc/html/dde_linux ......