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代碼片段和文件信息

#include?
#include?
#include?
#include?

int?main(int?argc?char?**argv)
{
????int?i;
????int?ret;
????int?fd;
????int?press_cnt[4];
????
????fd?=?open(“/dev/buttons“?0);??//?打開(kāi)設(shè)備
????if?(fd?????????printf(“Can‘t?open?/dev/buttons\n“);
????????return?-1;
????}

????//?這是個(gè)無(wú)限循環(huán),進(jìn)程有可能在read函數(shù)中休眠,當(dāng)有按鍵被按下時(shí),它才返回
????while?(1)?{
????????//?讀出按鍵被按下的次數(shù)
????????ret?=?read(fd?press_cnt?sizeof(press_cnt));
????????if?(ret?????????????printf(“read?err!\n“);
????????????continue;
????????}?

????????for?(i?=?0;?i?????????????//?如果被按下的次數(shù)不為0,打印出來(lái)
????????????if?(press_cnt[i])
????????????????printf(“K%d?has?been?pressed?%d?times!\n“?i+1?press_cnt[i]);
????????}
????}
????
????close(fd);
????return?

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????872??2008-01-23?03:33??drivers_and_test\buttons\button_test.c

?????文件????????137??2008-01-23?03:33??drivers_and_test\buttons\Makefile

?????文件???????4842??2008-01-23?03:33??drivers_and_test\buttons\s3c24xx_buttons.c

?????目錄??????????0??2009-08-13?14:15??drivers_and_test\buttons

?????文件??????20706??2008-01-23?03:33??drivers_and_test\fb_test\fb.h

?????文件??????11827??2008-01-23?03:33??drivers_and_test\fb_test\fb_test.c

?????文件?????????81??2008-01-23?03:33??drivers_and_test\fb_test\Makefile

?????目錄??????????0??2009-08-13?14:15??drivers_and_test\fb_test

?????文件?????585928??2009-07-28?21:30??drivers_and_test\leds\led_test

?????文件????????989??2008-01-23?03:33??drivers_and_test\leds\led_test.c

?????文件????????122??2008-01-23?03:33??drivers_and_test\leds\Makefile

?????文件???????3266??2008-01-23?03:33??drivers_and_test\leds\s3c24xx_leds.c

?????目錄??????????0??2009-08-13?14:15??drivers_and_test\leds

?????文件????????127??2008-01-23?03:33??drivers_and_test\regeditor\Makefile

?????文件???????8340??2008-01-23?03:33??drivers_and_test\regeditor\regeditor.c

?????目錄??????????0??2009-08-13?14:15??drivers_and_test\regeditor

?????目錄??????????0??2009-08-13?14:15??drivers_and_test

-----------?---------??----------?-----??----

???????????????637237????????????????????17


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