linuxÏÂÃæ¶¨Ê±
alarm
Èç¹û²»ÒªÇóºÜ¾«È·µÄ»°£¬Óà alarm() ºÍ signal() ¾Í¹»ÁË
unsigned int alarm(unsigned int seconds)
ʾÀý£º
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
void sigalrm_fn(int sig)
{
/* Do something */
printf("alarm!\n");
alarm(2);
return;
}
int main(void)
{
signal(SIGALRM, sigalrm_fn);
alarm(2);
/* Do someting */
while(1) pause();
}
2. setitimer
int setitimer(int which, const struct itimerval *value, struct itimerval *ovalue));
3ÖÖÀàÐ͵Ķ¨Ê±Æ÷£º
ITIMER_REAL : ÒÔÏµÍ³ÕæÊµµÄʱ¼äÀ´¼ÆË㣬ËüËͳöSIGALRMÐźš£
ITIMER_VIRTUAL : ÒÔ¸ÃÐгÌÕæÕýÓÐÖ´ÐеÄʱ¼äÀ´¼ÆËã£
Ïà¹ØÎĵµ£º
1. HCI²ãÐÒé¸ÅÊö£º
HCIÌṩһÌ×ͳһµÄ·½·¨À´·ÃÎÊBluetoothµ×²ã¡£ÈçͼËùʾ£º
´ÓͼÉÏ¿ÉÒÔ¿´³ö£¬Host Controller Interface(HCI) ¾ÍÊÇÓÃÀ´¹µÍ¨HostºÍModule¡£Hostͨ³£¾ÍÊÇPC£¬ ModuleÔòÊÇÒÔ¸÷ÖÖÎïÀíÁ¬½ÓÐÎʽ£¨USB,serial,pc-cardµÈ£©Á¬½Óµ½PCÉϵÄbluetooth Dongle¡£
ÔÚHostÕâÒ»¶Ë£ºapplication,SDP,L2capµÈÐÒé ......
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
1.#uname -a
Èç¹ûÓÐx86_64¾ÍÊÇ64λµÄ£¬Ã»ÓоÍÊÇ32λµÄ
2.# uname -m
x86_64
3.# arch
x86_64
4.#file /bin/cat
/bin/cat: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), stripped
5.²é¿´cpuÊǶàÉÙλµÄ
more /proc/cpuinfo
ÔõÑù²é¿´ LI ......
ÎÊÌ⣺ÔÚLinuxÏÂÕý³£»»ÐеÄÎÄ×Ö£¬µ½ÁËWindowsϺ󣬲»ÔÙ»»ÐС£
ÔÚWindowsÏ»»ÐÐʱ£¬ÓÐÁ½¸ö×Ö·û£º»Ø³µ(\r)ºÍ»»ÐÐ(\n)¡£µ«ÔÚLinuxÏ£¬Ö»ÓÐÒ»¸ö»»ÐÐ(\n)
¿ÉʹÓÃunix2dosºÍdos2unixÃüÁî½øÐиñʽµÄת»»£º
²ÎÊý£º
-k ±£³ÖÊä³öÎļþºÍÊäÈëÎļþµÄÈÕÆÚʱ¼ä´Á²»±ä
-o file ĬÈÏģʽ . ½«fileת»»£ ......
µ÷ÊÔÓû§³ÌÐò£º
Ö÷»ú£ºlinux os
eclipse + cdt + gdb +gcc½»²æ±àÒëÁ´
Ä¿±ê»ú£ºarmlinux os
gdbServer
ͨѶ·½Ê½£ºtcp
Îļþ´«Ê䷽ʽ£ºftp, minicom, ͨ¹ýnfs.
ÅäÖòο¼ ......