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AVR ½ºÅ¾¿öÄ¡(StopWatch).zip

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http://happyjaryo.blogspot.kr/2016/11/avr-stopwatch.html

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3. ¼Ò½ºÄÚµå
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AVR ATmega128À» ÀÌ¿ëÇÏ¿© ½ºÅ¾¿öÄ¡(Stop Watch)¸¦ ±¸ÇöÇغ»´Ù. ºÐ:ÃÊ:ÇÁ·¹ÀÓ(1/100) ÀÇ ±¸¼ºÀ¸·Î 00:00:00 ~ 59:59:99 ÀÇ ¹üÀ§¾ÈÀÇ ½Ã°£À» Ä«¿îÆÃÇÑ´Ù. ±×¸®°í Start, Stop, Reset ½ºÀ§Ä¡ ¹öÆ°À» ÀÌ¿ëÇؼ­ ½ºÅ¾¿öÄ¡ÀÇ ½Ã°£À» ½ÃÀÛÇÏ°í, ¸ØÃß°í, ÃʱâÈ­½Ãų ¼ö ÀÖµµ·Ï ÇÑ´Ù.
AVRÀÇ Timer/Counter ±â´ÉÀ» ÀÌ¿ëÇÏ°í 7-Segmnet¸¦ ÀÌ¿ëÇÏ¿© ¼ýÀÚ¸¦ Ãâ·ÂÇÏ¿© ½ºÅ¾¿öÄ¡¸¦ ±¸ÇöÇÑ´Ù.

¥±. °³¹ßȯ°æ

¡¤ OS : Windows
¡¤ Program tool : AVR Studio, Atmel studio
¡¤ Compiler : AVR-GCC
¡¤ Language : C language
¡¤ AVR MCU : ATmega128

<Áß·«>
#include
#include

#define Fnd_delay 3 // FND Dynamic display ¹æ½ÄÀÇ Ãâ·ÂÁö¿¬(mSec)

unsigned int min = 0, sec = 0;
unsigned int min_d1,min_d2,sec_d1,sec_d2,frm_d1,frm_d2;
unsigned int stop_flag = 0;
unsigned int count=0;

<Áß·«>

À§ÀÇ °á°ú¿Í °°ÀÌ ½Ã:ºÐ:ÇÁ·¹ÀÓÀÌ ¼¼±×¸ÕÆ®¿¡ 1/100 Sec ´ÜÀ§·Î Ç¥½ÃµÇ´Â °ÍÀ» È®ÀÎ ÇÒ ¼ö ÀÖ´Ù. Stop ¹öÆ°À» ´©¸£¸é ½Ã°£ÀÌ ¸ØÃß°í Start ¹öÆ°À» ´©¸£¸é ´Ù½Ã ½Ã°£ÀÌ Ä«¿îÆà µÈ´Ù. Reset ¹öÆ°À» ´©¸£¸é ½Ã°£ÀÌ 00:00:00À¸·Î ÃʱâÈ­ µÈ´Ù.

- ¿ø¸® ¹× µ¿ÀÛÇؼ®

¡¤ 1/100 Sec ´ÜÀ§ Ä«¿îÆÃ

º» ½ºÅ¾¿öÄ¡´Â 1/100 Sec ´ÜÀ§·Î Ä«¿îÆõǸ鼭 ½Ã°£ÀÌ Ç¥½ÃµÈ´Ù. ¶§¹®¿¡ AVRÀÇ Timer/Counter ±â´ÉÀ» ÀÌ¿ëÇÏ¿© 1/100 Sec Áï, 100hzÀÇ ÁÖÆļö¸¦ ¸¸µé¾î ÁÙ ÇÊ¿ä°¡ ÀÖ´Ù.
±×·¯±â À§Çؼ­ 16 bitÀÎ Timer/Counter 1 ¸¦ CTC ¸ðµå·Î »ç¿ëÇÏ¿´´Ù. ±×¸®°í ÇÁ¸®½ºÄÉÀÏ·¯ÀÇ ºÐÁÖºñ´Â 256, OCR1A ÀÇ °ªÀº 624À̹ǷΠ°è»êÀº ´ÙÀ½°ú °°´Ù.
Ãâó : ÇØÇÇ·¹Æ÷Æ® ÀÚ·á½Ç

 
 

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