{"id":9327,"date":"2025-04-11T16:12:18","date_gmt":"2025-04-11T09:12:18","guid":{"rendered":"https:\/\/mb668s.com\/cam-nang-7mb66-xoc-dia\/?p=9327"},"modified":"2026-03-27T17:21:12","modified_gmt":"2026-03-27T10:21:12","slug":"he-thong-nhung-la-gi","status":"publish","type":"post","link":"https:\/\/mb668s.com\/cam-nang-7mb66-xoc-dia\/tu-van-nghe-nghiep\/he-thong-nhung-la-gi","title":{"rendered":"H\u1ec7 th\u1ed1ng nh\u00fang l\u00e0 g\u00ec? C\u1ea5u tr\u00fac, ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf"},"content":{"rendered":"\n
\u1ede th\u1eddi \u0111\u1ea1i s\u1ed1 h\u00f3a hi\u1ec7n nay, nhi\u1ec1u thi\u1ebft b\u1ecb quen thu\u1ed9c nh\u01b0 m\u00e1y gi\u1eb7t, \u0111i\u1ec1u h\u00f2a, \u00f4 t\u00f4 hay \u0111\u1ed3ng h\u1ed3 th\u00f4ng minh ho\u1ea1t \u0111\u1ed9ng nh\u1edd nh\u1eefng h\u1ec7 th\u1ed1ng b\u00ean trong m\u00e0 ng\u01b0\u1eddi d\u00f9ng \u00edt khi nh\u1eadn th\u1ea5y. Trong \u0111\u00f3, h\u1ec7 th\u1ed1ng nh\u00fang l\u00e0 g\u00ec<\/strong> \u0111ang tr\u1edf th\u00e0nh kh\u00e1i ni\u1ec7m then ch\u1ed1t, gi\u1ea3i th\u00edch c\u00e1ch c\u00e1c thi\u1ebft b\u1ecb v\u1eadn h\u00e0nh hi\u1ec7u qu\u1ea3, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u1ed5n \u0111\u1ecbnh. N\u1eafm b\u1eaft \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng nh\u00fang kh\u00f4ng ch\u1ec9 gi\u00fap hi\u1ec3u r\u00f5 n\u1ec1n t\u1ea3ng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i m\u00e0 c\u00f2n m\u1edf ra c\u01a1 h\u1ed9i ti\u1ebfp c\u1eadn s\u00e2u h\u01a1n v\u1edbi c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 IoT, t\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o.<\/p>\n\n\n\n H\u1ec7 th\u1ed1ng nh\u00fang (Embedded System) l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh chuy\u00ean d\u1ee5ng, \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p trong m\u1ed9t thi\u1ebft b\u1ecb ho\u1eb7c s\u1ea3n ph\u1ea9m l\u1edbn h\u01a1n \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t ho\u1eb7c m\u1ed9t s\u1ed1 ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3.<\/strong><\/p>\n<\/blockquote>\n\n\n\n Kh\u00e1c v\u1edbi m\u00e1y t\u00ednh \u0111a d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, h\u1ec7 th\u1ed1ng nh\u00fang c\u00f3 thi\u1ebft k\u1ebf t\u1ed1i \u01b0u v\u1ec1 ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m nh\u1eb1m \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc. M\u1ed9t h\u1ec7 th\u1ed1ng nh\u00fang th\u01b0\u1eddng bao g\u1ed3m b\u1ed9 vi x\u1eed l\u00fd (ho\u1eb7c vi \u0111i\u1ec1u khi\u1ec3n), b\u1ed9 nh\u1edb, giao ti\u1ebfp \u0111\u1ea7u v\u00e0o\/ra v\u00e0 ph\u1ea7n m\u1ec1m \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n \u0110i\u1ec3m \u0111\u1eb7c tr\u01b0ng c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang l\u00e0 t\u00ednh chuy\u00ean bi\u1ec7t , n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u t\u00e1c v\u1ee5 m\u00e0 ch\u1ec9 t\u1eadp trung v\u00e0o m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3 v\u1edbi \u0111\u1ed9 tin c\u1eady cao. Nh\u1edd \u0111\u00f3, h\u1ec7 th\u1ed1ng n\u00e0y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng, thi\u1ebft b\u1ecb y t\u1ebf, xe h\u01a1i, c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t v\u00e0 h\u00e0ng lo\u1ea1t c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng minh kh\u00e1c.<\/p>\n\n\n\n \u0110\u1ec3 hi\u1ec3u r\u00f5 c\u00e1ch m\u00e0 c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng minh v\u1eadn h\u00e0nh m\u01b0\u1ee3t m\u00e0 v\u00e0 ch\u00ednh x\u00e1c, ta c\u1ea7n \u0111i s\u00e2u v\u00e0o c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang \u2013 n\u01a1i t\u00edch h\u1ee3p ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m m\u1ed9t c\u00e1ch tinh g\u1ecdn nh\u1eb1m ph\u1ee5c v\u1ee5 cho c\u00e1c ch\u1ee9c n\u0103ng chuy\u00ean bi\u1ec7t. M\u1eb7c d\u00f9 m\u1ed7i h\u1ec7 th\u1ed1ng nh\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf kh\u00e1c nhau t\u00f9y theo m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng, nh\u01b0ng nh\u00ecn chung, ch\u00fang \u0111\u1ec1u c\u00f3 m\u1ed9t ki\u1ebfn tr\u00fac c\u01a1 b\u1ea3n t\u01b0\u01a1ng \u0111\u1ed1i gi\u1ed1ng nhau.<\/p>\n\n\n\n M\u1ed9t h\u1ec7 th\u1ed1ng nh\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u1ea5u th\u00e0nh t\u1eeb b\u1ed1n b\u1ed9 ph\u1eadn c\u01a1 b\u1ea3n sau:<\/strong><\/p>\n\n\n\n Quy tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng nh\u00fang tu\u00e2n theo chu tr\u00ecnh c\u01a1 b\u1ea3n: Thu nh\u1eadn d\u1eef li\u1ec7u \u2192 X\u1eed l\u00fd \u2192 Xu\u1ea5t ph\u1ea3n h\u1ed3i. \u0110\u1ea7u ti\u00ean, c\u1ea3m bi\u1ebfn s\u1ebd thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb m\u00f4i tr\u01b0\u1eddng nh\u01b0 nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 \u1ea9m, \u00e1p su\u1ea5t ho\u1eb7c chuy\u1ec3n \u0111\u1ed9ng. Sau \u0111\u00f3, d\u1eef li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c g\u1eedi t\u1edbi vi \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 x\u1eed l\u00fd theo ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh s\u1eb5n. Cu\u1ed1i c\u00f9ng, k\u1ebft qu\u1ea3 x\u1eed l\u00fd s\u1ebd \u0111i\u1ec1u khi\u1ec3n c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u ra nh\u01b0 hi\u1ec3n th\u1ecb th\u00f4ng tin tr\u00ean m\u00e0n h\u00ecnh, b\u1eadt\/t\u1eaft thi\u1ebft b\u1ecb, ph\u00e1t t\u00edn hi\u1ec7u c\u1ea3nh b\u00e1o, v.v.<\/p>\n\n\n\n V\u00ed d\u1ee5: trong m\u1ed9t h\u1ec7 th\u1ed1ng nh\u00fang \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 s\u1ebd li\u00ean t\u1ee5c g\u1eedi d\u1eef li\u1ec7u v\u1ec1 cho vi \u0111i\u1ec1u khi\u1ec3n. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t ng\u01b0\u1ee1ng \u0111\u00e3 c\u00e0i \u0111\u1eb7t, h\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng k\u00edch ho\u1ea1t m\u00e1y n\u00e9n \u0111\u1ec3 l\u00e0m l\u1ea1nh. Khi nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, vi \u0111i\u1ec1u khi\u1ec3n s\u1ebd t\u1eaft m\u00e1y n\u00e9n \u0111\u1ec3 ti\u1ebft ki\u1ec7m \u0111i\u1ec7n.<\/p>\n\n\n\n T\u00ednh hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang \u0111\u1ebfn t\u1eeb s\u1ef1 ph\u1ea3n h\u1ed3i t\u1ee9c th\u1eddi, \u0111\u1ed9 tin c\u1eady cao v\u00e0 kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 can thi\u1ec7p c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n\n\n\n
<\/figure>\n\n\n\nH\u1ec7 th\u1ed1ng nh\u00fang l\u00e0 g\u00ec?<\/h2>\n\n\n\n
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C\u1ea5u tr\u00fac v\u00e0 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang<\/h2>\n\n\n\n
C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh<\/h3>\n\n\n\n
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\u0110\u00e2y l\u00e0 \u201cb\u1ed9 n\u00e3o\u201d c\u1ee7a h\u1ec7 th\u1ed1ng, ch\u1ecbu tr\u00e1ch nhi\u1ec7m x\u1eed l\u00fd c\u00e1c l\u1ec7nh v\u00e0 \u0111i\u1ec1u khi\u1ec3n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb. Trong h\u1ec7 th\u1ed1ng nh\u00fang, CPU th\u01b0\u1eddng l\u00e0 lo\u1ea1i vi \u0111i\u1ec1u khi\u1ec3n (Microcontroller) \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n nhi\u1ec1u ch\u1ee9c n\u0103ng nh\u01b0 RAM, ROM, b\u1ed9 \u0111\u1ebfm th\u1eddi gian, giao ti\u1ebfp I\/O,… nh\u1eb1m t\u1ed1i \u01b0u kh\u00f4ng gian v\u00e0 chi ph\u00ed.<\/li>\n\n\n\n
ROM ho\u1eb7c Flash d\u00f9ng \u0111\u1ec3 l\u01b0u tr\u1eef ch\u01b0\u01a1ng tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n (firmware), trong khi RAM d\u00f9ng \u0111\u1ec3 x\u1eed l\u00fd t\u1ea1m th\u1eddi d\u1eef li\u1ec7u khi h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng. T\u00f9y theo \u1ee9ng d\u1ee5ng, b\u1ed9 nh\u1edb c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang c\u00f3 th\u1ec3 r\u1ea5t h\u1ea1n ch\u1ebf v\u1ec1 dung l\u01b0\u1ee3ng.<\/li>\n\n\n\n
Bao g\u1ed3m c\u00e1c c\u1ea3m bi\u1ebfn (nh\u1eadn t\u00edn hi\u1ec7u t\u1eeb m\u00f4i tr\u01b0\u1eddng nh\u01b0 nhi\u1ec7t \u0111\u1ed9, \u00e1nh s\u00e1ng, chuy\u1ec3n \u0111\u1ed9ng…) v\u00e0 c\u00e1c b\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u (\u0111\u00e8n LED, \u0111\u1ed9ng c\u01a1, m\u00e0n h\u00ecnh…). \u0110\u00e2y l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa th\u1ebf gi\u1edbi v\u1eadt l\u00fd v\u00e0 h\u1ec7 th\u1ed1ng x\u1eed l\u00fd b\u00ean trong.<\/li>\n\n\n\n
RTOS gi\u00fap h\u1ec7 th\u1ed1ng x\u1eed l\u00fd \u0111a nhi\u1ec7m m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c theo th\u1eddi gian th\u1ef1c, \u0111\u1ea3m b\u1ea3o \u0111\u00e1p \u1ee9ng nhanh ch\u00f3ng c\u00e1c t\u00edn hi\u1ec7u quan tr\u1ecdng. V\u1edbi nh\u1eefng \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 t\u00ednh \u1ed5n \u0111\u1ecbnh cao nh\u01b0 thi\u1ebft b\u1ecb y t\u1ebf hay \u00f4 t\u00f4, RTOS \u0111\u00f3ng vai tr\u00f2 kh\u00f4ng th\u1ec3 thi\u1ebfu.<\/li>\n<\/ul>\n\n\n\nQuy tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng nh\u00fang<\/h3>\n\n\n\n
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