{"id":11175,"date":"2026-04-11T10:19:34","date_gmt":"2026-04-11T02:19:34","guid":{"rendered":"https:\/\/www.archimetric.com\/vn\/state-machine-diagram-basics-embedded-systems-guide\/"},"modified":"2026-04-11T10:19:34","modified_gmt":"2026-04-11T02:19:34","slug":"state-machine-diagram-basics-embedded-systems-guide","status":"publish","type":"post","link":"https:\/\/www.archimetric.com\/vn\/state-machine-diagram-basics-embedded-systems-guide\/","title":{"rendered":"C\u00e1c Kh\u00e1i Ni\u1ec7m C\u01a1 B\u1ea3n v\u1ec1 S\u01a1 \u0110\u1ed3 M\u00e1y Tr\u1ea1ng Th\u00e1i: H\u01b0\u1edbng D\u1eabn T\u1eebng B\u01b0\u1edbc cho Ng\u01b0\u1eddi M\u1edbi B\u1eaft \u0110\u1ea7u H\u1ec7 Th\u1ed1ng Nh\u00fang"},"content":{"rendered":"<p>C\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t th\u1ebf gi\u1edbi v\u1edbi nh\u1eefng r\u00e0ng bu\u1ed9c nghi\u00eam ng\u1eb7t. M\u1ed7i chu k\u1ef3 \u0111\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb, v\u00e0 m\u1ed7i byte b\u1ed9 nh\u1edb \u0111\u1ec1u quan tr\u1ecdng. Trong m\u00f4i tr\u01b0\u1eddng n\u00e0y, s\u1ef1 r\u00f5 r\u00e0ng trong m\u00e3 ngu\u1ed3n kh\u00f4ng ch\u1ec9 l\u00e0 \u0111i\u1ec1u mong mu\u1ed1n m\u00e0 c\u00f2n l\u00e0 y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 an to\u00e0n. M\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd nh\u1ea5t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 r\u00f5 r\u00e0ng n\u00e0y l\u00e0 S\u01a1 \u0111\u1ed3 M\u00e1y Tr\u1ea1ng th\u00e1i trong khu\u00f4n kh\u1ed5 Ng\u00f4n ng\u1eef M\u00f4 h\u00ecnh H\u00f3a \u0110\u01a1n Nh\u1ea5t (UML). Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p b\u1ea3n v\u1ebd tr\u1ef1c quan v\u1ec1 c\u00e1ch ph\u1ea7n m\u1ec1m ho\u1ea1t \u0111\u1ed9ng theo th\u1eddi gian khi ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n.<\/p>\n<p>Hi\u1ec3u c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a logic b\u1eb1ng m\u00e1y tr\u1ea1ng th\u00e1i l\u00e0 n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i \u0111\u1ec3 thi\u1ebft k\u1ebf c\u00e1c \u1ee9ng d\u1ee5ng nh\u00fang b\u1ec1n v\u1eefng. D\u00f9 b\u1ea1n \u0111ang x\u00e2y d\u1ef1ng m\u1ed9t chi\u1ebfc \u0111i\u1ec1u h\u00f2a \u0111\u01a1n gi\u1ea3n hay m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u00f4 t\u00f4 ph\u1ee9c t\u1ea1p, vi\u1ec7c tr\u1ef1c quan h\u00f3a v\u00f2ng \u0111\u1eddi ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n s\u1ebd gi\u00fap ng\u0103n ng\u1eeba c\u00e1c l\u1ed7i logic tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ph\u00e2n t\u00edch c\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i, c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e2y d\u1ef1ng \u0111\u1ec3 t\u1ea1o ra c\u00e1c S\u01a1 \u0111\u1ed3 M\u00e1y Tr\u1ea1ng th\u00e1i hi\u1ec7u qu\u1ea3.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn whiteboard infographic explaining State Machine Diagram basics for embedded systems beginners, featuring color-coded core components (states in blue, transitions in green, events in red, actions in orange, guard conditions in purple), 5-step diagram building process, practical thermostat logic example, common pitfalls warnings, and State Machine vs Flowchart comparison table for visual learning\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/04\/state-machine-diagram-embedded-systems-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83e\udde0 S\u01a1 \u0111\u1ed3 M\u00e1y Tr\u1ea1ng th\u00e1i l\u00e0 g\u00ec?<\/h2>\n<p>S\u01a1 \u0111\u1ed3 M\u00e1y Tr\u1ea1ng th\u00e1i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 Tr\u1ea1ng th\u00e1i hay S\u01a1 \u0111\u1ed3 Ho\u1ea1t \u0111\u1ed9ng t\u1eadp trung v\u00e0o tr\u1ea1ng th\u00e1i, bi\u1ec3u di\u1ec5n h\u00e0nh vi \u0111\u1ed9ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 l\u01b0u \u0111\u1ed3, v\u1ed1n m\u00f4 t\u1ea3 m\u1ed9t chu\u1ed7i c\u00e1c b\u01b0\u1edbc tuy\u1ebfn t\u00ednh, m\u00e1y tr\u1ea1ng th\u00e1i m\u00f4 t\u1ea3 <strong>\u0111i\u1ec1u ki\u1ec7n<\/strong>m\u00e0 t\u1ea1i \u0111\u00f3 h\u1ec7 th\u1ed1ng t\u1ed3n t\u1ea1i v\u00e0o b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o. N\u00f3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: \u201cH\u1ec7 th\u1ed1ng hi\u1ec7n t\u1ea1i tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o, v\u00e0 \u0111i\u1ec1u g\u00ec l\u00e0m thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng \u0111\u00f3?\u201d<\/p>\n<p>Trong b\u1ed1i c\u1ea3nh h\u1ec7 th\u1ed1ng nh\u00fang, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u1ed3ng ngh\u0129a v\u1edbi M\u00e1y Tr\u1ea1ng th\u00e1i H\u1eefu h\u1ea1n (FSM). Ph\u1ea7n &#8216;H\u1eefu h\u1ea1n&#8217; l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t. N\u00f3 c\u00f3 ngh\u0129a l\u00e0 h\u1ec7 th\u1ed1ng ch\u1ec9 c\u00f3 th\u1ec3 \u1edf m\u1ed9t tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 t\u1ea1i b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o. H\u1ec7 th\u1ed1ng kh\u00f4ng th\u1ec3 v\u1eeba &#8216;\u0110ang Ch\u1ea1y&#8217; v\u1eeba &#8216;D\u1eebng&#8217; \u0111\u1ed3ng th\u1eddi. S\u1ef1 ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng n\u00e0y gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c g\u1ee1 l\u1ed7i v\u00e0 ki\u1ec3m th\u1eed.<\/p>\n<h2>\ud83d\udd11 C\u00e1c Th\u00e0nh Ph\u1ea7n Ch\u00ednh c\u1ee7a M\u00e1y Tr\u1ea1ng Th\u00e1i<\/h2>\n<p>\u0110\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t s\u01a1 \u0111\u1ed3, b\u1ea1n ph\u1ea3i hi\u1ec3u \u0111\u01b0\u1ee3c t\u1eeb v\u1ef1ng. M\u1ecdi s\u01a1 \u0111\u1ed3 h\u1ee3p l\u1ec7 \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb m\u1ed9t t\u1eadp h\u1ee3p c\u1ee5 th\u1ec3 c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng. Nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0y x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac v\u00e0 logic c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h3>1. Tr\u1ea1ng th\u00e1i<\/h3>\n<p>M\u1ed9t tr\u1ea1ng th\u00e1i bi\u1ec3u di\u1ec5n m\u1ed9t \u0111i\u1ec1u ki\u1ec7n trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c h\u1ec7 th\u1ed1ng. \u0110\u00f3 l\u00e0 kho\u1ea3ng th\u1eddi gian m\u00e0 h\u1ec7 th\u1ed1ng \u0111ang ch\u1edd m\u1ed9t s\u1ef1 ki\u1ec7n. V\u1ec1 m\u1eb7t tr\u1ef1c quan, c\u00e1c tr\u1ea1ng th\u00e1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c v\u1ebd d\u01b0\u1edbi d\u1ea1ng h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n.<\/p>\n<ul>\n<li><strong>Tr\u1ea1ng th\u00e1i \u0110\u01a1n gi\u1ea3n:<\/strong> M\u1ed9t tr\u1ea1ng th\u00e1i c\u01a1 b\u1ea3n kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac b\u00ean trong (v\u00ed d\u1ee5: \u201cCh\u1edd\u201d, \u201cHo\u1ea1t \u0111\u1ed9ng\u201d).<\/li>\n<li><strong>Tr\u1ea1ng th\u00e1i H\u1ee3p th\u00e0nh:<\/strong> M\u1ed9t tr\u1ea1ng th\u00e1i ch\u1ee9a c\u00e1c tr\u1ea1ng th\u00e1i con kh\u00e1c (v\u00ed d\u1ee5: \u201c\u0110ang X\u1eed l\u00fd\u201d c\u00f3 th\u1ec3 bao g\u1ed3m \u201c\u0110\u1ecdc C\u1ea3m Bi\u1ebfn\u201d ho\u1eb7c \u201cGhi D\u1eef Li\u1ec7u\u201d).<\/li>\n<li><strong>Tr\u1ea1ng th\u00e1i Kh\u1edfi \u0111\u1ea7u:<\/strong> \u0110i\u1ec3m kh\u1edfi \u0111\u1ea7u c\u1ee7a m\u00e1y. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t h\u00ecnh tr\u00f2n \u0111\u1ea7y.<\/li>\n<li><strong>Tr\u1ea1ng th\u00e1i K\u1ebft th\u00fac:<\/strong> \u0110i\u1ec3m k\u1ebft th\u00fac. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t h\u00ecnh tr\u00f2n \u0111\u1ea7y n\u1eb1m trong m\u1ed9t h\u00ecnh tr\u00f2n l\u1edbn h\u01a1n.<\/li>\n<\/ul>\n<h3>2. Chuy\u1ec3n ti\u1ebfp<\/h3>\n<p>M\u1ed9t chuy\u1ec3n ti\u1ebfp l\u00e0 s\u1ef1 di chuy\u1ec3n t\u1eeb m\u1ed9t tr\u1ea1ng th\u00e1i n\u00e0y sang tr\u1ea1ng th\u00e1i kh\u00e1c. N\u00f3 bi\u1ec3u di\u1ec5n s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee7a h\u1ec7 th\u1ed1ng. C\u00e1c chuy\u1ec3n ti\u1ebfp \u0111\u01b0\u1ee3c v\u1ebd b\u1eb1ng c\u00e1c m\u0169i t\u00ean n\u1ed1i hai tr\u1ea1ng th\u00e1i.<\/p>\n<ul>\n<li>C\u00e1c chuy\u1ec3n ti\u1ebfp di\u1ec5n ra t\u1ee9c th\u00ec. H\u1ec7 th\u1ed1ng kh\u00f4ng d\u00e0nh th\u1eddi gian &#8216;trong qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp&#8217;.<\/li>\n<li>Ch\u00fang \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1edfi c\u00e1c s\u1ef1 ki\u1ec7n c\u1ee5 th\u1ec3.<\/li>\n<li>Ch\u00fang c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n (b\u1ea3o v\u1ec7) ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n \u0111\u1ec3 chuy\u1ec3n ti\u1ebfp x\u1ea3y ra.<\/li>\n<\/ul>\n<h3>3. S\u1ef1 ki\u1ec7n<\/h3>\n<p>M\u1ed9t s\u1ef1 ki\u1ec7n l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n quan tr\u1ecdng k\u00edch ho\u1ea1t m\u1ed9t chuy\u1ec3n ti\u1ebfp. Trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang, c\u00e1c s\u1ef1 ki\u1ec7n th\u01b0\u1eddng l\u00e0:<\/p>\n<ul>\n<li>Ng\u1eaft ph\u1ea7n c\u1ee9ng (v\u00ed d\u1ee5: nh\u1ea5n n\u00fat).<\/li>\n<li>H\u1ebft th\u1eddi gian ch\u1edd (v\u00ed d\u1ee5: b\u1ed9 \u0111\u1ebfm th\u1eddi gian h\u1ebft h\u1ea1n).<\/li>\n<li>T\u00edn hi\u1ec7u ph\u1ea7n m\u1ec1m (v\u00ed d\u1ee5: d\u1eef li\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb m\u1ea1ng).<\/li>\n<li>Ho\u00e0n th\u00e0nh khi v\u00e0o\/r\u1eddi tr\u1ea1ng th\u00e1i.<\/li>\n<\/ul>\n<h3>4. H\u00e0nh \u0111\u1ed9ng<\/h3>\n<p>H\u00e0nh \u0111\u1ed9ng l\u00e0 c\u00f4ng vi\u1ec7c \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi h\u1ec7 th\u1ed1ng. Ch\u00fang \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi tr\u1ea1ng th\u00e1i ho\u1eb7c chuy\u1ec3n ti\u1ebfp. C\u00f3 ba lo\u1ea1i h\u00e0nh \u0111\u1ed9ng ch\u00ednh:<\/p>\n<ul>\n<li><strong>H\u00e0nh \u0111\u1ed9ng v\u00e0o:<\/strong>M\u00e3 ch\u1ea1y ngay l\u1eadp t\u1ee9c khi h\u1ec7 th\u1ed1ng v\u00e0o m\u1ed9t tr\u1ea1ng th\u00e1i.<\/li>\n<li><strong>H\u00e0nh \u0111\u1ed9ng r\u1eddi:<\/strong>M\u00e3 ch\u1ea1y ngay l\u1eadp t\u1ee9c khi h\u1ec7 th\u1ed1ng r\u1eddi kh\u1ecfi m\u1ed9t tr\u1ea1ng th\u00e1i.<\/li>\n<li><strong>H\u00e0nh \u0111\u1ed9ng th\u1ef1c hi\u1ec7n:<\/strong>M\u00e3 ch\u1ea1y li\u00ean t\u1ee5c trong khi h\u1ec7 th\u1ed1ng v\u1eabn \u1edf tr\u1ea1ng th\u00e1i \u0111\u00f3 (v\u00ed d\u1ee5: v\u00f2ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1).<\/li>\n<\/ul>\n<h3>5. \u0110i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7<\/h3>\n<p>M\u1ed9t \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c logic x\u00e1c \u0111\u1ecbnh xem m\u1ed9t chuy\u1ec3n ti\u1ebfp c\u00f3 th\u1ec3 x\u1ea3y ra hay kh\u00f4ng. N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi canh c\u1eeda. Ngay c\u1ea3 khi m\u1ed9t s\u1ef1 ki\u1ec7n x\u1ea3y ra, tr\u1ea1ng th\u00e1i c\u0169ng s\u1ebd kh\u00f4ng thay \u0111\u1ed5i tr\u1eeb khi \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 \u0111\u00e1nh gi\u00e1 l\u00e0 \u0111\u00fang.<\/p>\n<ul>\n<li>V\u00ed d\u1ee5: <code>if (m\u1ee9cPin &gt; 20%)<\/code><\/li>\n<li>V\u00ed d\u1ee5: <code>if (nhi\u1ec7t \u0111\u1ed9 &lt; 100)<\/code><\/li>\n<\/ul>\n<h2>\ud83d\udcca B\u1ea3ng so s\u00e1nh th\u00e0nh ph\u1ea7n<\/h2>\n<p>\u0110\u1ec3 l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y, h\u00e3y tham kh\u1ea3o b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<table>\n<thead>\n<tr>\n<th>Th\u00e0nh ph\u1ea7n<\/th>\n<th>K\u00fd hi\u1ec7u h\u00ecnh \u1ea3nh<\/th>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<th>Th\u1eddi gian<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u1ea1ng th\u00e1i<\/td>\n<td>H\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n<\/td>\n<td>Bi\u1ec3u di\u1ec5n m\u1ed9t \u0111i\u1ec1u ki\u1ec7n<\/td>\n<td>Th\u1eddi gian (c\u00f3 th\u1ec3 d\u00e0i ho\u1eb7c ng\u1eafn)<\/td>\n<\/tr>\n<tr>\n<td>Chuy\u1ec3n ti\u1ebfp<\/td>\n<td>M\u0169i t\u00ean<\/td>\n<td>K\u1ebft n\u1ed1i hai tr\u1ea1ng th\u00e1i<\/td>\n<td>T\u1ee9c th\u00ec<\/td>\n<\/tr>\n<tr>\n<td>S\u1ef1 ki\u1ec7n<\/td>\n<td>V\u0103n b\u1ea3n tr\u00ean m\u0169i t\u00ean<\/td>\n<td>K\u00edch ho\u1ea1t chuy\u1ec3n ti\u1ebfp<\/td>\n<td>\u0110i\u1ec3m x\u1ea3y ra<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec1u ki\u1ec7n<\/td>\n<td>V\u0103n b\u1ea3n trong d\u1ea5u ngo\u1eb7c vu\u00f4ng []<\/td>\n<td>X\u00e1c th\u1ef1c chuy\u1ec3n ti\u1ebfp<\/td>\n<td>Tr\u01b0\u1edbc khi chuy\u1ec3n ti\u1ebfp \u0111\u01b0\u1ee3c th\u1ef1c thi<\/td>\n<\/tr>\n<tr>\n<td>H\u00e0nh \u0111\u1ed9ng<\/td>\n<td>V\u0103n b\u1ea3n tr\u00ean m\u0169i t\u00ean ho\u1eb7c trong tr\u1ea1ng th\u00e1i<\/td>\n<td>Th\u1ef1c thi logic<\/td>\n<td>Trong qu\u00e1 tr\u00ecnh v\u00e0o, ra ho\u1eb7c \u1edf l\u1ea1i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udee0\ufe0f H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc x\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3<\/h2>\n<p>Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 t\u1eeb \u0111\u1ea7u c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n c\u1ea3m th\u1ea5y cho\u00e1ng ng\u1ee3p. H\u00e3y tu\u00e2n theo quy tr\u00ecnh c\u00f3 c\u1ea5u tr\u00fac n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n v\u00e0 \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 m\u1eb7t logic.<\/p>\n<h3>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi h\u1ec7 th\u1ed1ng<\/h3>\n<p>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u m\u00e0 m\u00e1y tr\u1ea1ng th\u00e1i ki\u1ec3m so\u00e1t. Li\u1ec7u n\u00f3 c\u00f3 ph\u1ea3i l\u00e0 to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb hay ch\u1ec9 l\u00e0 m\u1ed9t module c\u1ee5 th\u1ec3? Gi\u1eef cho ph\u1ea1m vi d\u1ec5 qu\u1ea3n l\u00fd l\u00e0 \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng. V\u00ed d\u1ee5, \u0111\u1eebng c\u1ed1 g\u1eafng m\u00f4 h\u00ecnh h\u00f3a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed \u00f4 t\u00f4 trong m\u1ed9t s\u01a1 \u0111\u1ed3. H\u00e3y t\u1eadp trung v\u00e0o &#8220;B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1&#8221; ho\u1eb7c &#8220;Module qu\u1ea3n l\u00fd ngu\u1ed3n \u0111i\u1ec7n&#8221; c\u1ee5 th\u1ec3.<\/p>\n<h3>B\u01b0\u1edbc 2: Li\u1ec7t k\u00ea c\u00e1c tr\u1ea1ng th\u00e1i<\/h3>\n<p>Th\u1ea3o lu\u1eadn m\u1ecdi t\u00ecnh tr\u1ea1ng c\u00f3 th\u1ec3 x\u1ea3y ra \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng. H\u00e3y t\u1ef1 h\u1ecfi b\u1ea3n th\u00e2n: &#8220;Nh\u1eefng ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng ri\u00eang bi\u1ec7t l\u00e0 g\u00ec?&#8221;<\/p>\n<ul>\n<li>T\u1eaft ngu\u1ed3n<\/li>\n<li>Kh\u1edfi \u0111\u1ed9ng<\/li>\n<li>Ch\u1edd \u0111\u1ee3i<\/li>\n<li>Ho\u1ea1t \u0111\u1ed9ng ch\u00ednh<\/li>\n<li>Kh\u00f4i ph\u1ee5c l\u1ed7i<\/li>\n<\/ul>\n<p>\u0110\u1ea3m b\u1ea3o c\u00e1c tr\u1ea1ng th\u00e1i n\u00e0y lo\u1ea1i tr\u1eeb nhau. H\u1ec7 th\u1ed1ng kh\u00f4ng th\u1ec3 \u1edf trong hai tr\u1ea1ng th\u00e1i c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<h3>B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh c\u00e1c s\u1ef1 ki\u1ec7n<\/h3>\n<p>\u0110i\u1ec1u g\u00ec khi\u1ebfn h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i b\u1ea1n \u0111\u00e3 li\u1ec7t k\u00ea \u1edf B\u01b0\u1edbc 2? H\u00e3y xem x\u00e9t c\u00e1c \u0111\u1ea7u v\u00e0o.<\/p>\n<ul>\n<li>\u0110\u1ea7u v\u00e0o ng\u01b0\u1eddi d\u00f9ng (Nh\u1ea5n n\u00fat)<\/li>\n<li>T\u00edn hi\u1ec7u b\u00ean ngo\u00e0i (D\u1eef li\u1ec7u c\u1ea3m bi\u1ebfn)<\/li>\n<li>B\u1ed9 \u0111\u1ebfm n\u1ed9i b\u1ed9<\/li>\n<li>L\u1ed7i h\u1ec7 th\u1ed1ng<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: V\u1ebd c\u00e1c chuy\u1ec3n ti\u1ebfp<\/h3>\n<p>K\u1ebft n\u1ed1i c\u00e1c tr\u1ea1ng th\u00e1i b\u1eb1ng c\u00e1c m\u0169i t\u00ean. G\u00e1n nh\u00e3n cho m\u1ed7i m\u0169i t\u00ean b\u1eb1ng s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t n\u00f3. N\u1ebfu m\u1ed9t chuy\u1ec3n ti\u1ebfp y\u00eau c\u1ea7u \u0111i\u1ec1u ki\u1ec7n, h\u00e3y th\u00eam \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 trong d\u1ea5u ngo\u1eb7c.<\/p>\n<ul>\n<li>V\u1ebd m\u1ed9t h\u00ecnh tr\u00f2n \u0111\u1eadm cho \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u.<\/li>\n<li>V\u1ebd m\u1ed9t h\u00ecnh tr\u00f2n k\u00e9p cho \u0111i\u1ec3m k\u1ebft th\u00fac.<\/li>\n<li>K\u1ebft n\u1ed1i \u0111i\u1ec3m B\u1eaft \u0111\u1ea7u v\u1edbi tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng ban \u0111\u1ea7u.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 5: Th\u00eam H\u00e0nh \u0111\u1ed9ng<\/h3>\n<p>X\u00e1c \u0111\u1ecbnh nh\u1eefng g\u00ec x\u1ea3y ra b\u00ean trong m\u1ed7i tr\u1ea1ng th\u00e1i. N\u1ebfu vi\u1ec7c v\u00e0o tr\u1ea1ng th\u00e1i &#8220;Active&#8221; y\u00eau c\u1ea7u kh\u1edfi t\u1ea1o m\u1ed9t bi\u1ebfn, h\u00e3y ghi \u0111i\u1ec1u \u0111\u00f3 d\u01b0\u1edbi d\u1ea1ng H\u00e0nh \u0111\u1ed9ng V\u00e0o. N\u1ebfu vi\u1ec7c r\u1eddi kh\u1ecfi tr\u1ea1ng th\u00e1i &#8220;Active&#8221; y\u00eau c\u1ea7u l\u01b0u d\u1eef li\u1ec7u, h\u00e3y ghi \u0111i\u1ec1u \u0111\u00f3 d\u01b0\u1edbi d\u1ea1ng H\u00e0nh \u0111\u1ed9ng Ra.<\/p>\n<h2>\ud83c\udf21\ufe0f V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: Logic \u0111i\u1ec1u khi\u1ec3n m\u00e1y l\u00e0m m\u00e1t<\/h2>\n<p>H\u00e3y \u00e1p d\u1ee5ng nh\u1eefng kh\u00e1i ni\u1ec7m n\u00e0y v\u00e0o m\u1ed9t t\u00ecnh hu\u1ed1ng nh\u00fang kinh \u0111i\u1ec3n: m\u00e1y l\u00e0m m\u00e1t s\u1ed1. V\u00ed d\u1ee5 n\u00e0y minh h\u1ecda c\u00e1ch qu\u1ea3n l\u00fd logic \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng.<\/p>\n<h3>M\u00f4 t\u1ea3 t\u00ecnh hu\u1ed1ng<\/h3>\n<p>M\u00e1y l\u00e0m m\u00e1t c\u00f3 hai ch\u1ebf \u0111\u1ed9 ch\u00ednh: S\u01b0\u1edfi \u1ea5m v\u00e0 L\u00e0m m\u00e1t. N\u00f3 b\u1eaft \u0111\u1ea7u \u1edf tr\u1ea1ng th\u00e1i &#8220;T\u1eaft&#8221;. Khi m\u1ed9t n\u00fat \u0111\u01b0\u1ee3c nh\u1ea5n, n\u00f3 chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 &#8220;Thi\u1ebft l\u1eadp&#8221;. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi \u0111i\u1ec3m \u0111\u1eb7t, n\u00f3 s\u1ebd k\u00edch ho\u1ea1t ch\u1ebf \u0111\u1ed9 &#8220;S\u01b0\u1edfi \u1ea5m&#8221;. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean tr\u00ean \u0111i\u1ec3m \u0111\u1eb7t, n\u00f3 s\u1ebd k\u00edch ho\u1ea1t ch\u1ebf \u0111\u1ed9 &#8220;L\u00e0m m\u00e1t&#8221;.<\/p>\n<h3>X\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3<\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch c\u00e1c tr\u1ea1ng th\u00e1i v\u00e0 chuy\u1ec3n ti\u1ebfp \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch cho h\u1ec7 th\u1ed1ng n\u00e0y.<\/p>\n<ul>\n<li><strong>Tr\u1ea1ng th\u00e1i: T\u1eaeT<\/strong>\n<ul>\n<li><strong>H\u00e0nh \u0111\u1ed9ng V\u00e0o:<\/strong> T\u1eaft b\u1ed9 \u0111\u1ed1t, t\u1eaft qu\u1ea1t.<\/li>\n<li><strong>S\u1ef1 ki\u1ec7n:<\/strong> Nh\u1ea5n_n\u00fat<\/li>\n<li><strong>Chuy\u1ec3n ti\u1ebfp:<\/strong> Chuy\u1ec3n sang &#8220;THI\u1ebeT L\u1eacP&#8221;.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u1ea1ng th\u00e1i: THI\u1ebeT L\u1eacP<\/strong>\n<ul>\n<li><strong>H\u00e0nh \u0111\u1ed9ng V\u00e0o:<\/strong> Hi\u1ec3n th\u1ecb nhi\u1ec7t \u0111\u1ed9 hi\u1ec7n t\u1ea1i.<\/li>\n<li><strong>S\u1ef1 ki\u1ec7n:<\/strong> Gi\u1ea3m_nhi\u1ec7t_\u0111\u1ed9<\/li>\n<li><strong>Chuy\u1ec3n ti\u1ebfp:<\/strong> Gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 m\u1ee5c ti\u00eau.<\/li>\n<li><strong>S\u1ef1 ki\u1ec7n:<\/strong> Nh\u1ea5n_n\u00fat (Gi\u1eef)<\/li>\n<li><strong>Chuy\u1ec3n ti\u1ebfp:<\/strong> Chuy\u1ec3n sang &#8220;S\u01af\u1edeI \u1ea4M&#8221;.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u1ea1ng th\u00e1i: \u0110ANG H\u00c0NH NHI\u1ec6T<\/strong>\n<ul>\n<li><strong>H\u00e0nh \u0111\u1ed9ng v\u00e0o:<\/strong> \u0110\u1eb7t ch\u00e2n b\u1ed9 ph\u1eadn l\u00e0m n\u00f3ng \u1edf m\u1ee9c cao.<\/li>\n<li><strong>H\u00e0nh \u0111\u1ed9ng th\u1ef1c hi\u1ec7n:<\/strong> \u0110\u1ecdc c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 m\u1ed7i 5 gi\u00e2y.<\/li>\n<li><strong>\u0110i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7:<\/strong> N\u1ebfu (nhi\u1ec7t \u0111\u1ed9 hi\u1ec7n t\u1ea1i &gt;= nhi\u1ec7t \u0111\u1ed9 m\u1ee5c ti\u00eau)<\/li>\n<li><strong>Chuy\u1ec3n ti\u1ebfp:<\/strong> Chuy\u1ec3n sang &#8220;T\u1eaeT&#8221;.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>C\u1ea5u tr\u00fac n\u00e0y \u0111\u1ea3m b\u1ea3o b\u1ed9 ph\u1eadn l\u00e0m n\u00f3ng s\u1ebd kh\u00f4ng bao gi\u1edd b\u1eadt l\u00ean tr\u1eeb khi h\u1ec7 th\u1ed1ng \u0111ang \u1edf tr\u1ea1ng th\u00e1i &#8220;\u0110ang h\u00e0nh nhi\u1ec7t&#8221; r\u00f5 r\u00e0ng. N\u00f3 c\u0169ng ng\u0103n ch\u1eb7n c\u00e1c h\u00e0nh \u0111\u1ed9ng m\u00e2u thu\u1eabn, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1eadt b\u1ed9 ph\u1eadn l\u00e0m n\u00f3ng v\u00e0 qu\u1ea1t c\u00f9ng l\u00fac theo c\u00e1ch g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ng\u1eafn m\u1ea1ch.<\/p>\n<h2>\u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong thi\u1ebft k\u1ebf tr\u1ea1ng th\u00e1i<\/h2>\n<p>Ngay c\u1ea3 nh\u1eefng k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 ph\u1ee9c t\u1ea1p khi\u1ebfn m\u00e1y tr\u1ea1ng th\u00e1i tr\u1edf n\u00ean kh\u00f3 b\u1ea3o tr\u00ec. H\u00e3y l\u01b0u \u00fd nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn n\u00e0y.<\/p>\n<h3>1. Tr\u1ea1ng th\u00e1i &#8220;B\u00e1nh m\u00ec x\u00e0o&#8221;<\/h3>\n<p>Tr\u00e1nh t\u1ea1o s\u01a1 \u0111\u1ed3 m\u00e0 m\u1ecdi tr\u1ea1ng th\u00e1i \u0111\u1ec1u k\u1ebft n\u1ed1i v\u1edbi nhau. N\u1ebfu b\u1ea1n th\u1ea5y m\u1ed9t m\u1ea1ng l\u01b0\u1edbi c\u00e1c m\u0169i t\u00ean ch\u00e9o nhau, logic c\u00f3 th\u1ec3 qu\u00e1 ph\u1ee9c t\u1ea1p. S\u1eed d\u1ee5ng c\u00e1c tr\u1ea1ng th\u00e1i h\u1ee3p th\u00e0nh \u0111\u1ec3 nh\u00f3m c\u00e1c h\u00e0nh vi li\u00ean quan. V\u00ed d\u1ee5, thay v\u00ec c\u00f3 &#8220;Error_1&#8221;, &#8220;Error_2&#8221; v\u00e0 &#8220;Error_3&#8221; nh\u01b0 c\u00e1c tr\u1ea1ng th\u00e1i c\u1ea5p cao ri\u00eang bi\u1ec7t, h\u00e3y nh\u00f3m ch\u00fang d\u01b0\u1edbi m\u1ed9t tr\u1ea1ng th\u00e1i cha &#8220;Error&#8221; c\u00f3 c\u00e1c tr\u1ea1ng th\u00e1i con.<\/p>\n<h3>2. Thi\u1ebfu chuy\u1ec3n ti\u1ebfp<\/h3>\n<p>\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu m\u1ed9t s\u1ef1 ki\u1ec7n x\u1ea3y ra trong tr\u1ea1ng th\u00e1i m\u00e0 n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a? Trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn l\u1ed7i h\u1ec7 th\u1ed1ng ho\u1eb7c h\u00e0nh vi kh\u00f4ng x\u00e1c \u0111\u1ecbnh. Lu\u00f4n \u0111\u1ecbnh ngh\u0129a m\u1ed9t chuy\u1ec3n ti\u1ebfp &#8220;b\u1eaft t\u1ea5t c\u1ea3&#8221; ho\u1eb7c \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng x\u1eed l\u00fd c\u00e1c s\u1ef1 ki\u1ec7n b\u1ea5t ng\u1edd m\u1ed9t c\u00e1ch tr\u01a1n tru, c\u00f3 th\u1ec3 b\u1eb1ng c\u00e1ch chuy\u1ec3n sang tr\u1ea1ng th\u00e1i &#8220;L\u1ed7i&#8221; m\u1eb7c \u0111\u1ecbnh.<\/p>\n<h3>3. Chuy\u1ec3n ti\u1ebfp kh\u00f4ng nguy\u00ean t\u1eed<\/h3>\n<p>\u0110\u1ea3m b\u1ea3o c\u00e1c chuy\u1ec3n ti\u1ebfp x\u1ea3y ra nh\u01b0 m\u1ed9t \u0111\u01a1n v\u1ecb logic duy nh\u1ea5t. N\u1ebfu m\u1ed9t chuy\u1ec3n ti\u1ebfp bao g\u1ed3m vi\u1ec7c thay \u0111\u1ed5i nhi\u1ec1u bi\u1ebfn, t\u1ea5t c\u1ea3 c\u00e1c bi\u1ebfn \u0111\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt tr\u01b0\u1edbc khi h\u1ec7 th\u1ed1ng chuy\u1ec3n sang tr\u1ea1ng th\u00e1i ti\u1ebfp theo. Kh\u00f4ng cho ph\u00e9p h\u1ec7 th\u1ed1ng \u1edf l\u1ea1i trong tr\u1ea1ng th\u00e1i c\u1eadp nh\u1eadt m\u1ed9t ph\u1ea7n.<\/p>\n<h3>4. L\u1ea1m d\u1ee5ng h\u00e0nh \u0111\u1ed9ng &#8220;Do&#8221;<\/h3>\n<p>M\u1eb7c d\u00f9 c\u00e1c h\u00e0nh \u0111\u1ed9ng &#8220;Do&#8221; h\u1eefu \u00edch cho vi\u1ec7c gi\u00e1m s\u00e1t li\u00ean t\u1ee5c, nh\u01b0ng l\u1ea1m d\u1ee5ng ch\u00fang c\u00f3 th\u1ec3 khi\u1ebfn m\u00e1y tr\u1ea1ng th\u00e1i tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t v\u00f2ng l\u1eb7p li\u00ean t\u1ee5c thay v\u00ec m\u00f4 h\u00ecnh d\u1ef1a tr\u00ean tr\u1ea1ng th\u00e1i. D\u00e0nh c\u00e1c h\u00e0nh \u0111\u1ed9ng &#8220;Do&#8221; cho c\u00e1c t\u00e1c v\u1ee5 ph\u1ea3i ch\u1ea1y l\u1eb7p l\u1ea1i khi h\u1ec7 th\u1ed1ng \u0111ang ch\u1edd m\u1ed9t s\u1ef1 ki\u1ec7n, ch\u1eb3ng h\u1ea1n nh\u01b0 qu\u00e9t c\u1ea3m bi\u1ebfn.<\/p>\n<h2>\ud83d\udd0d Ph\u00e2n t\u00edch s\u00e2u: \u0110i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 so v\u1edbi logic trong h\u00e0nh \u0111\u1ed9ng<\/h2>\n<p>M\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng xuy\u00ean nh\u1ea5t trong thi\u1ebft k\u1ebf nh\u00fang l\u00e0 n\u00ean \u0111\u1eb7t logic \u1edf \u0111\u00e2u: trong \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 hay trong ch\u00ednh h\u00e0nh \u0111\u1ed9ng.<\/p>\n<ul>\n<li><strong>\u0110i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7:<\/strong> S\u1eed d\u1ee5ng ch\u00fang cho c\u00e1c ki\u1ec3m tra logic \u0111\u01a1n gi\u1ea3n x\u00e1c \u0111\u1ecbnh<em>n\u1ebfu<\/em> m\u1ed9t chuy\u1ec3n ti\u1ebfp x\u1ea3y ra. Gi\u1eef ch\u00fang nh\u1eb9 nh\u00e0ng. N\u1ebfu logic qu\u00e1 ph\u1ee9c t\u1ea1p, n\u00f3 s\u1ebd l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh x\u1eed l\u00fd s\u1ef1 ki\u1ec7n.<\/li>\n<li><strong>H\u00e0nh \u0111\u1ed9ng:<\/strong> S\u1eed d\u1ee5ng ch\u00fang cho c\u00f4ng vi\u1ec7c th\u1ef1c t\u1ebf<em>c\u00f4ng vi\u1ec7c<\/em> \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp. N\u1ebfu b\u1ea1n c\u1ea7n t\u00ednh to\u00e1n m\u1ed9t gi\u00e1 tr\u1ecb ho\u1eb7c c\u1eadp nh\u1eadt m\u1ed9t bi\u1ebfn, h\u00e3y th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 trong h\u00e0nh \u0111\u1ed9ng.<\/li>\n<\/ul>\n<p>X\u00e9t m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 m\u1ed9t chuy\u1ec3n ti\u1ebfp ch\u1ec9 x\u1ea3y ra n\u1ebfu m\u1ee9c pin \u0111\u1ee7. \u0110i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 c\u1ea7n ki\u1ec3m tra <code>n\u1ebfu (pin &gt; 10%)<\/code>. N\u1ebfu \u0111\u00fang, h\u00e0nh \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0 <code>b\u1eadt\u0110\u1ed9ngC\u01a1()<\/code>. S\u1ef1 t\u00e1ch bi\u1ec7t n\u00e0y gi\u00fap s\u01a1 \u0111\u1ed3 d\u1ec5 \u0111\u1ecdc: m\u0169i t\u00ean cho b\u1ea1n bi\u1ebft <em>khi<\/em>n\u00f3 x\u1ea3y ra, v\u00e0 nh\u00e3n cho b\u1ea1n bi\u1ebft <em>g\u00ec<\/em>n\u00f3 l\u00e0m.<\/p>\n<h2>\ud83e\uddea Ki\u1ec3m th\u1eed v\u00e0 X\u00e1c minh<\/h2>\n<p>M\u1ed9t khi s\u01a1 \u0111\u1ed3 ho\u00e0n t\u1ea5t, l\u00e0m sao b\u1ea1n bi\u1ebft n\u00f3 ho\u1ea1t \u0111\u1ed9ng? Thi\u1ebft k\u1ebf d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh cho ph\u00e9p b\u1ea1n ki\u1ec3m th\u1eed s\u01a1 \u0111\u1ed3 tr\u01b0\u1edbc khi vi\u1ebft b\u1ea5t k\u1ef3 d\u00f2ng m\u00e3 C hay C++ n\u00e0o.<\/p>\n<h3>1. Bao ph\u1ee7 \u0111\u01b0\u1eddng \u0111i<\/h3>\n<p>Theo d\u00f5i m\u1ecdi \u0111\u01b0\u1eddng \u0111i kh\u1ea3 d\u0129 qua s\u01a1 \u0111\u1ed3. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn m\u1ecdi tr\u1ea1ng th\u00e1i kh\u00f4ng? B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn m\u1ecdi chuy\u1ec3n ti\u1ebfp kh\u00f4ng? \u0110\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 ng\u00f5 c\u1ee5t n\u00e0o khi\u1ebfn h\u1ec7 th\u1ed1ng b\u1ecb k\u1eb9t.<\/p>\n<h3>2. Ki\u1ec3m th\u1eed th\u1ee9 t\u1ef1 s\u1ef1 ki\u1ec7n<\/h3>\n<p>M\u00f4 ph\u1ecfng m\u1ed9t chu\u1ed7i s\u1ef1 ki\u1ec7n. V\u00ed d\u1ee5, nh\u1ea5n N\u00fat, ch\u1edd 5 gi\u00e2y, nh\u1ea5n N\u00fat l\u1ea7n n\u1eefa. Tr\u1ea1ng th\u00e1i c\u00f3 thay \u0111\u1ed5i nh\u01b0 d\u1ef1 ki\u1ebfn kh\u00f4ng? \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c minh r\u1eb1ng th\u1eddi gian v\u00e0 th\u1ee9 t\u1ef1 s\u1ef1 ki\u1ec7n l\u00e0 ch\u00ednh x\u00e1c.<\/p>\n<h3>3. C\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean<\/h3>\n<p>Ki\u1ec3m th\u1eed c\u00e1c gi\u1edbi h\u1ea1n. \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu nhi\u1ec7t \u0111\u1ed9 \u0111\u00fang b\u1eb1ng ng\u01b0\u1ee1ng? \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu hai s\u1ef1 ki\u1ec7n x\u1ea3y ra \u0111\u1ed3ng th\u1eddi? \u0110\u1ea3m b\u1ea3o m\u00e1y tr\u1ea1ng th\u00e1i x\u1eed l\u00fd c\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean n\u00e0y m\u00e0 kh\u00f4ng b\u1ecb s\u1eadp.<\/p>\n<h2>\ud83d\udd04 M\u00e1y tr\u1ea1ng th\u00e1i so v\u1edbi S\u01a1 \u0111\u1ed3 lu\u1ed3ng<\/h2>\n<p>Ng\u01b0\u1eddi m\u1edbi th\u01b0\u1eddng nh\u1ea7m l\u1eabn gi\u1eefa S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i v\u1edbi S\u01a1 \u0111\u1ed3 lu\u1ed3ng. M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng h\u00ecnh d\u1ea1ng v\u00e0 m\u0169i t\u00ean, nh\u01b0ng ch\u00fang ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau.<\/p>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i<\/th>\n<th>S\u01a1 \u0111\u1ed3 lu\u1ed3ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u1ecdng t\u00e2m<\/td>\n<td>H\u00e0nh vi h\u1ec7 th\u1ed1ng theo th\u1eddi gian<\/td>\n<td>Lu\u1ed3ng th\u1ef1c thi thu\u1eadt to\u00e1n<\/td>\n<\/tr>\n<tr>\n<td>Th\u1eddi l\u01b0\u1ee3ng<\/td>\n<td>C\u00e1c tr\u1ea1ng th\u00e1i c\u00f3 th\u1eddi l\u01b0\u1ee3ng (th\u1eddi gian d\u00e0nh cho)<\/td>\n<td>C\u00e1c b\u01b0\u1edbc x\u1ea3y ra t\u1ee9c th\u00ec<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u v\u00e0o<\/td>\n<td>S\u1ef1 ki\u1ec7n (B\u00ean ngo\u00e0i\/Ng\u1eaft)<\/td>\n<td>D\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng<\/td>\n<td>Cao (C\u00e1c tr\u1ea1ng th\u00e1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1i s\u1eed d\u1ee5ng)<\/td>\n<td>Th\u1ea5p (\u0110\u01b0\u1eddng \u0111i tuy\u1ebfn t\u00ednh)<\/td>\n<\/tr>\n<tr>\n<td>Ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi<\/td>\n<td>\u0110i\u1ec1u khi\u1ec3n nh\u00fang, Logic giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng<\/td>\n<td>T\u00ednh to\u00e1n, X\u1eed l\u00fd d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang, M\u00e1y tr\u1ea1ng th\u00e1i v\u01b0\u1ee3t tr\u1ed9i h\u01a1n trong logic \u0111i\u1ec1u khi\u1ec3n v\u00ec n\u00f3 x\u1eed l\u00fd r\u00f5 r\u00e0ng c\u00e1c kho\u1ea3ng th\u1eddi gian ch\u1edd \u0111\u1ee3i v\u00e0 ph\u1ea3n h\u1ed3i s\u1ef1 ki\u1ec7n, nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u1ecbnh ngh\u0129a c\u00e1c h\u1ec7 th\u1ed1ng th\u1eddi gian th\u1ef1c.<\/p>\n<h2>\ud83d\udcdd C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho M\u00e1y tr\u1ea1ng th\u00e1i nh\u00fang<\/h2>\n<p>\u0110\u1ec3 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng m\u00e3 ngu\u1ed3n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng, tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y khi tri\u1ec3n khai logic \u0111\u01b0\u1ee3c suy ra t\u1eeb s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n.<\/p>\n<ul>\n<li><strong>Quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean:<\/strong>\u0110\u1eb7t t\u00ean r\u00f5 r\u00e0ng cho c\u00e1c tr\u1ea1ng th\u00e1i v\u00e0 s\u1ef1 ki\u1ec7n. S\u1eed d\u1ee5ng ki\u1ec3u PascalCase cho c\u00e1c tr\u1ea1ng th\u00e1i (v\u00ed d\u1ee5: <code>StateIdle<\/code>) v\u00e0 ki\u1ec3u CamelCase cho c\u00e1c s\u1ef1 ki\u1ec7n (v\u00ed d\u1ee5: <code>OnButtonPressed<\/code>).<\/li>\n<li><strong>T\u00e1ch bi\u1ec7t tr\u1ea1ng th\u00e1i:<\/strong>Gi\u1eef c\u00e1c tr\u1ea1ng th\u00e1i nh\u1ecf g\u1ecdn. N\u1ebfu m\u1ed9t tr\u1ea1ng th\u00e1i ch\u1ee9a qu\u00e1 nhi\u1ec1u logic, h\u00e3y chia n\u00f3 th\u00e0nh c\u00e1c tr\u1ea1ng th\u00e1i con.<\/li>\n<li><strong>X\u1eed l\u00fd s\u1ef1 ki\u1ec7n:<\/strong>S\u1eed d\u1ee5ng h\u00e0ng \u0111\u1ee3i s\u1ef1 ki\u1ec7n \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd theo th\u1ee9 t\u1ef1 v\u00e0 ng\u0103n ng\u1eeba c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ea1nh tranh.<\/li>\n<li><strong>Bi\u1ebfn tr\u1ea1ng th\u00e1i:<\/strong>Theo d\u00f5i tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i trong m\u1ed9t bi\u1ebfn ri\u00eang bi\u1ec7t. Tr\u00e1nh s\u1eed d\u1ee5ng c\u1edd \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i; h\u00e3y s\u1eed d\u1ee5ng ch\u00ednh bi\u1ebfn tr\u1ea1ng th\u00e1i \u0111\u00f3.<\/li>\n<li><strong>T\u00e0i li\u1ec7u:<\/strong>Gi\u1eef s\u01a1 \u0111\u1ed3 lu\u00f4n c\u1eadp nh\u1eadt. N\u1ebfu m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i, s\u01a1 \u0111\u1ed3 ph\u1ea3i ph\u1ea3n \u00e1nh s\u1ef1 thay \u0111\u1ed5i \u0111\u00f3. M\u1ed9t s\u01a1 \u0111\u1ed3 l\u1ed7i th\u1eddi nguy hi\u1ec3m h\u01a1n c\u1ea3 vi\u1ec7c kh\u00f4ng c\u00f3 s\u01a1 \u0111\u1ed3.<\/li>\n<\/ul>\n<h2>\ud83d\ude80 K\u1ebft lu\u1eadn<\/h2>\n<p>Thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m nh\u00fang \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c v\u00e0 t\u1ea7m nh\u00ecn xa. S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i cung c\u1ea5p n\u1ec1n t\u1ea3ng tr\u1ef1c quan c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 ch\u00ednh x\u00e1c n\u00e0y. B\u1eb1ng c\u00e1ch chia nh\u1ecf h\u00e0nh vi ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c tr\u1ea1ng th\u00e1i r\u1eddi r\u1ea1c v\u00e0 c\u00e1c chuy\u1ec3n ti\u1ebfp \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a r\u00f5 r\u00e0ng, b\u1ea1n t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 hi\u1ec3u, d\u1ec5 ki\u1ec3m th\u1eed v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n<p>B\u1eaft \u0111\u1ea7u nh\u1ecf. M\u00f4 h\u00ecnh h\u00f3a m\u1ed9t ch\u1ee9c n\u0103ng \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc ti\u00ean. Khi b\u1ea1n quen thu\u1ed9c v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n\u2014tr\u1ea1ng th\u00e1i, chuy\u1ec3n ti\u1ebfp, s\u1ef1 ki\u1ec7n v\u00e0 \u0111i\u1ec1u ki\u1ec7n\u2014b\u1ea1n s\u1ebd nh\u1eadn ra r\u1eb1ng c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u1ed9 c\u00f4ng c\u1ee5 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n. Ch\u00fang bi\u1ebfn logic tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh m\u1ed9t b\u1ea3n \u0111\u1ed3 c\u1ee5 th\u1ec3, d\u1eabn d\u1eaft m\u00e3 ngu\u1ed3n c\u1ee7a b\u1ea1n qua nh\u1eefng ph\u1ee9c t\u1ea1p c\u1ee7a t\u01b0\u01a1ng t\u00e1c th\u1ef1c t\u1ebf v\u1edbi ph\u1ea7n c\u1ee9ng.<\/p>\n<p>H\u00e3y nh\u1edb, m\u1ee5c ti\u00eau kh\u00f4ng ch\u1ec9 l\u00e0 vi\u1ebft m\u00e3 ngu\u1ed3n ho\u1ea1t \u0111\u1ed9ng, m\u00e0 c\u00f2n l\u00e0 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc tr\u01b0\u1edbc b\u1ea3n ch\u1ea5t kh\u00f4ng th\u1ec3 \u0111o\u00e1n tr\u01b0\u1edbc c\u1ee7a th\u1ebf gi\u1edbi th\u1ef1c. V\u1edbi n\u1ec1n t\u1ea3ng m\u00e1y tr\u1ea1ng th\u00e1i v\u1eefng ch\u1eafc, c\u00e1c d\u1ef1 \u00e1n nh\u00fang c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t th\u1ebf gi\u1edbi v\u1edbi nh\u1eefng r\u00e0ng bu\u1ed9c nghi\u00eam ng\u1eb7t. M\u1ed7i chu k\u1ef3 \u0111\u1ec1u<\/p>\n","protected":false},"author":3479,"featured_media":11176,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"C\u01a1 b\u1ea3n S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i: H\u01b0\u1edbng d\u1eabn cho H\u1ec7 th\u1ed1ng nh\u00fang","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i cho h\u1ec7 th\u1ed1ng nh\u00fang. H\u01b0\u1edbng d\u1eabn UML t\u1eebng b\u01b0\u1edbc bao g\u1ed3m tr\u1ea1ng th\u00e1i, chuy\u1ec3n ti\u1ebfp, s\u1ef1 ki\u1ec7n v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[127],"tags":[162,101],"class_list":["post-11175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-uml"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u01a1 b\u1ea3n S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i: H\u01b0\u1edbng d\u1eabn cho H\u1ec7 th\u1ed1ng nh\u00fang<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i cho h\u1ec7 th\u1ed1ng nh\u00fang. 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