{"id":2246,"date":"2015-07-08T11:29:07","date_gmt":"2015-07-08T04:29:07","guid":{"rendered":"http:\/\/www.payitforward.edu.vn\/wordpress\/?page_id=2246"},"modified":"2017-09-26T11:42:04","modified_gmt":"2017-09-26T04:42:04","slug":"luu-y-su-dung-kit-tiva-launchpad","status":"publish","type":"page","link":"https:\/\/payitforward.edu.vn\/wordpress\/tutorials\/arm-cortex-m4\/luu-y-su-dung-kit-tiva-launchpad\/","title":{"rendered":"L\u01b0u \u00fd s\u1eed d\u1ee5ng KIT Tiva Launchpad"},"content":{"rendered":"

Sau t\u00ecnh h\u00ecnh c\u1ee9u ch\u1eefa v\u00e0i ca chi\u1ec1u nay, v\u00e0 c\u00f3 v\u00e0i ca b\u00e1c s\u0129 b\u00f3 tay, BTC ph\u1ea3i c\u00f4ng b\u1ed1 c\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u1ea9n c\u1ea5p v\u00e0 nh\u1eefng \u0111i\u1ec1u c\u00e1c b\u1ea1n c\u1ea7n ph\u1ea3i ch\u00fa \u00fd khi s\u1eed d\u1ee5ng M\u1ea1ch M4 Launchpad (c\u0169ng nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i KIT kh\u00e1c) \u0111\u1ec3 tr\u00e1nh h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng \":2cool_after_boom:<\/span><\/p>\n

N\u1ed9i dung \u0111ang \u0111\u01b0\u1ee3c up d\u1ea7n l\u00ean, c\u00e1c b\u1ea1n theo d\u00f5i \u0111\u1ec3 ph\u00f2ng tr\u00e1nh tai n\u1ea1n th\u1ea3m kh\u1ed1c li\u00ean quan \u0111\u1ebfn t\u00ednh m\u1ea1ng \":gach<\/span><\/p>\n

1 \u2013 N\u1ebfu c\u1ea7n h\u00e0n th\u00eam header cho c\u00e1c ch\u00e2n c\u00f2n tr\u1ed1ng:<\/span><\/span><\/p>\n

D\u00f9ng lo\u1ea1i header \u0111\u1ef1c, \u0111\u01a1n, lo\u1ea1i d\u00e0i<\/span>. \u0110\u1ea9y \u0111\u1ebf nh\u1ef1a gi\u1eef header v\u00e0o gi\u1eefa<\/span><\/span> thanh header.<\/p>\n

H\u00e0n sao cho kho\u1ea3ng \u00bd header n\u1eb1m tr\u00ean board, v\u00e0 \u00bd c\u00f2n l\u1ea1i quay xu\u1ed1ng d\u01b0\u1edbi.<\/span><\/span><\/p>\n

V\u00ec \u1edf v\u00f2ng thi \u0111\u1ea5u robot, board M4 n\u00e0y \u0111\u01b0\u1ee3c g\u1eafn l\u00ean 1 board m\u1ea1ch l\u1edbn, do \u0111\u00f3 c\u1ea7n c\u00e1c header quay xu\u1ed1ng d\u01b0\u1edbi \u0111\u1ec3 ti\u1ebfp x\u00fac \u0111\u01b0\u1ee3c.<\/p>\n

Ph\u1ea7n header quay l\u00ean tr\u00ean b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 c\u1eafm d\u00e2y bus nh\u01b0 th\u00f4ng th\u01b0\u1eddng.<\/p>\n

Kh\u00f4ng \u0111\u01b0\u1ee3c<\/span><\/span> \u0111\u1eb7t board l\u00ean c\u00e1c b\u1ec1 m\u1eb7t d\u1eabn \u0111i\u1ec7n (vd b\u00e0n kim lo\u1ea1i,…), kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ec3 ch\u00ec, d\u00e2y di\u1ec7n, \u1ed1c v\u00edt v\u00e0 c\u00e1c v\u1eadt d\u1eabn \u0111i\u1ec7n kh\u00e1c \u1edf d\u01b0\u1edbi board. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0m ch\u1ea1m, ch\u1eadp v\u00e0 ch\u1ebft chip.<\/span><\/span><\/p>\n

Nh\u01b0 h\u00ecnh sau, c\u00e1c ch\u00e2n I\/O \u0111\u01b0\u1ee3c h\u00e0n b\u1eb1ng header d\u00e0i, 1 n\u1eeda n\u1eb1m tr\u00ean v\u00e0 1 n\u1eeda quay xu\u1ed1ng d\u01b0\u1edbi, n\u00ean board m\u00e0u \u0111\u1ecf c\u00f3 th\u1ec3 g\u1eafn \u0111\u01b0\u1ee3c l\u00ean board m\u00e0u xanh (board xanh c\u00f3 h\u00e0ng header c\u00e1i).<\/p>\n

\"[IMG]\"<\/p>\n

Do m\u1eb7t sau kit M4 c\u00f3 s\u1eb5n 2 h\u00e0ng header c\u00e1i, do v\u1eady c\u00e1c b\u1ea1n canh sao cho \u0111\u1ed9 d\u00e0i c\u1ee7a header (\u0111\u1ef1c) m\u00ecnh m\u1edbi h\u00e0n th\u00eam b\u1eb1ng v\u1edbi header c\u00e1i c\u00f3 s\u1eb5n<\/span> \u0111\u1ec3 c\u1eafm l\u00ean board kh\u00f4ng b\u1ecb v\u00eanh v\u00e0 ti\u1ebfp x\u00fac t\u1ed1t.<\/span><\/p>\n

\u0110\u00e2y l\u00e0 header d\u00e0i (kho\u1ea3ng 1.5cm, c\u00f2n c\u00f3 1 lo\u1ea1i d\u00e0i h\u01a1n (kho\u1ea3ng 2cm) nh\u01b0ng kh\u00f3 ki\u1ebfm ch\u1ed7 mua):<\/p>\n

\"[IMG]\"<\/p>\n

2 – C\u1ea5p ngu\u1ed3n 5V t\u1eeb m\u1ea1ch ngo\u00e0i v\u00e0o kit M4<\/span><\/span><\/p>\n

Do ta kh\u00f4ng th\u1ec3 l\u00fac n\u00e0o c\u0169ng d\u00f9ng ngu\u1ed3n USB \u0111\u1ec3 chip M4 ho\u1ea1t \u0111\u1ed9ng, do \u0111\u00f3 c\u1ea7n ph\u1ea3i c\u00f3 bi\u1ec7n ph\u00e1p c\u1ea5p ngu\u1ed3n ngo\u00e0i cho MCU. M\u1ed9t s\u1ed1 b\u1ea1n t\u1eadn d\u1ee5ng c\u00e1c c\u1ecdc 3V3 ho\u1eb7c +Vbus (5V) t\u1ea1i 2 h\u00e0ng header m\u1edf r\u1ed9ng \u0111\u1ec3 c\u1ea5p ngu\u1ed3n qua c\u00e1c ch\u00e2n n\u00e0y, tuy nhi\u00ean c\u00e1ch \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ed1t nh\u1ea5t.<\/p>\n

V\u1ecb tr\u00ed c\u1ea5p ngu\u1ed3n t\u1ed1t nh\u1ea5t cho m\u1ea1ch,<\/span> \u0111\u00f3 l\u00e0 v\u1ecb tr\u00ed c\u1ea5p ngu\u1ed3n 5V \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u tr\u00ean h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y (kh\u00f4ng d\u00f9ng ch\u1ee9c n\u0103ng giao ti\u1ebfp USB), v\u1edbi \u01b0u \u0111i\u1ec3m:<\/p>\n

+ V\u1eabn s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c c\u00f4ng t\u1eafc ngu\u1ed3n<\/span> (g\u1ea1t sang tr\u00e1i l\u00e0 l\u1ea5y ngu\u1ed3n ngo\u00e0i, g\u1ea1t sang ph\u1ea3i l\u00e0 l\u1ea5y ngu\u1ed3n t\u1eeb c\u1ed5ng USB c\u1ee7a laptop, tr\u00e1nh \u0111\u01b0\u1ee3c tr\u01b0\u1eddng h\u1ee3p xung \u0111\u1ed9t n\u1ebfu c\u1eafm d\u00e2y v\u00f4 n\u1ea1p code m\u00e0 qu\u00ean c\u1eaft ngu\u1ed3n ngo\u00e0i).<\/p>\n

+ S\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c con regulator<\/span> (\u1ed5n \u00e1p t\u1eeb 5v –> 3v3) tr\u00ean kit M4 \u0111\u1ec3 t\u1ea1o ngu\u1ed3n 3v3 cho MCU (Th\u00f4ng th\u01b0\u1eddng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh, ng\u01b0\u1eddi ta th\u01b0\u1eddng thi\u1ebft k\u1ebf c\u1ea5p ngu\u1ed3n ri\u00eang cho MCU, ko d\u00f9ng chung v\u1edbi ngo\u1ea1i vi).<\/p>\n

Khi c\u1ea5p ngu\u1ed3n qua v\u1ecb tr\u00ed n\u00e0y, b\u1ea1n h\u00e0n header d\u00e0i nh\u01b0 l\u01b0u \u00fd \u1edf ph\u1ea7n #1<\/span><\/span><\/p>\n

\"[IMG]\"<\/p>\n

3 – \u0110\u1ec7m gi\u1eefa I\/O c\u1ee7a MCU v\u1edbi ngo\u1ea1i vi<\/span><\/span><\/p>\n

C\u00f3 th\u1ec3 d\u00f9ng transistor, ULN2803 nh\u01b0 gi\u1edbi thi\u1ec7u trong bu\u1ed5i training (t\u1ea5t nhi\u00ean l\u00e0 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng).<\/span><\/p>\n

C\u1ea7n nh\u1edb r\u1eb1ng ch\u00e2n MCU c\u00f3 kh\u1ea3 n\u0103ng c\u1ea5p \/ ch\u1ecbu d\u00f2ng (source\/sink current) gi\u1edbi h\u1ea1n, b\u1ea1n kh\u00f4ng \u0111\u01b0\u1ee3c cho ch\u00e2n MCU t\u1ea3i qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y (check datasheet,…). Khi nhi\u1ec1u ch\u00e2n I\/O c\u00f9ng c\u1ea5p d\u00f2ng ra c\u00f3 th\u1ec3 l\u00e0m s\u1ee5t \u00e1p ngu\u1ed3n, chip b\u1ecb reset, ch\u1ea1y kh\u00f4ng \u1ed5n \u0111\u1ecbnh, ho\u1eb7c t\u1ec7 h\u01a1n, die lu\u00f4n, do \u0111\u00f3, v\u1edbi c\u00e1c d\u00f2ng MCU lo\u1ea1i ch\u00e2n d\u00e1n nh\u1ecf nh\u1ecf nh\u01b0 th\u1ebf n\u00e0y, ta lu\u00f4n lu\u00f4n ph\u1ea3i \u0111\u1ec7m gi\u1eefa ch\u00e2n MCU v\u00e0 c\u00e1c ngo\u1ea1i vi.<\/span><\/span><\/p>\n

M\u1ed9t IC th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 <\/span>74HC245 – \u0111\u1ec7m kh\u00f4ng \u0111\u1ea3o <\/span>(output = input)<\/span><\/p>\n

L\u01b0u \u00fd c\u00f3 74HC245 (c\u1ea5p ngu\u1ed3n \u0111\u01b0\u1ee3c t\u1eeb 2V – 6V), 74HCT<\/span>245 (ch\u1ec9 c\u1ea5p ngu\u1ed3n 5V). Con n\u00e0y c\u00f3 8 k\u00eanh v\u00e0o, 8 k\u00eanh ra. H\u01b0\u1edbng truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi ch\u00e2n DIR (n\u1ebfu DIR=1 th\u00ec input l\u00e0 c\u00e1c ch\u00e2n A, output l\u00e0 c\u00e1c ch\u00e2n B, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i).<\/span><\/p>\n

C\u00e1ch m\u1eafc s\u01a1 \u0111\u1ed3 nh\u01b0 v\u00ed d\u1ee5 sau:<\/span><\/p>\n

\"[IMG]\"<\/span><\/p>\n

Khi c\u1ea5p ngu\u1ed3n nh\u01b0 Ph\u1ea7n #2<\/span>, b\u1ea1n n\u00ean d\u00f9ng ngu\u1ed3n 3v3 tr\u00ean KIT M4 ch\u1ec9 d\u00e0nh ri\u00eang cho MCU<\/span><\/span>th\u00f4i, c\u00f2n ph\u1ea7n m\u1ea1ch ph\u00e1t tri\u1ec3n c\u1ee7a b\u1ea1n c\u00f3 th\u00eam m\u1ed9t ngu\u1ed3n 3v3 kh\u00e1c<\/span><\/span>, d\u00e0nh cho c\u00e1c ngo\u1ea1i vi, 2 ngu\u1ed3n n\u00e0y ch\u1ec9 c\u1ea7n n\u1ed1i chung GND.<\/span><\/p>\n

Ngu\u1ed3n “kh\u00e1c” n\u00e0y c\u1ea5p cho IC \u0111\u1ec7m 74HC245.<\/span><\/p>\n

N\u1ebfu mu\u1ed1n t\u1ea1o ra t\u00edn hi\u1ec7u 5V<\/span> th\u00ec ch\u1ec9 c\u1ea7n c\u1ea5p ngu\u1ed3n 5V cho con 74HC245 l\u00e0 OK.<\/span><\/p>\n

T\u00fam l\u1ea1i c\u1ee7a c\u00e1i post #3 n\u00e0y l\u00e0:<\/span><\/span> b\u1ea1n lu\u00f4n lu\u00f4n ph\u1ea3i \u0111\u1ec7m gi\u1eefa ch\u00e2n MCU v\u00e0 b\u1ea5t-c\u1ee9-th\u1ee9-g\u00ec-b\u00ean-ngo\u00e0i<\/span>, k\u1ec3 c\u1ea3 ch\u1ec9 x\u00e0i \u0111\u1ec3 b\u1eadt t\u1eaft 1 con LED cho vui m\u1eaft. \u0110\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 d\u00f9ng transistor (c\u00f3 th\u1ec3 tham kh\u1ea3o trong schematic kit M4, ph\u1ea7n n\u1ed1i v\u1edbi con LED RGB: 3 ch\u00e2n \u0111\u1ec1u c\u00f3 BJT \u0111\u1ec7m gi\u1eefa). Ch\u00fa \u00fd thao t\u00e1c n\u00e0y s\u1ebd tr\u00e1nh \u0111\u01b0\u1ee3c kh\u00e1 nhi\u1ec1u h\u1eadu qu\u1ea3 \":6cool_boss:<\/p>\n

4 – Kh\u00f4ng n\u00ean d\u00f9ng ngu\u1ed3n 3v3 t\u1eeb KIT M4 c\u1ea5p cho c\u00e1c ngo\u1ea1i vi,<\/span><\/span> v\u00ed d\u1ee5 nh\u01b0 Led H\u1ed3ng ngo\u1ea1i v\u00e0 c\u00e1c IC \u0111i\u1ec1u khi\u1ec3n LED.<\/p>\n

C\u1ea7n thi\u1ebft k\u1ebf m\u1ea1ch ngu\u1ed3n 3v3 kh\u00e1c \u0111\u1ec3 x\u00e0i cho c\u00e1c m\u1ea1ch b\u00ean ngo\u00e0i, nh\u01b0 tinh th\u1ea7n \u0111\u00e3 n\u00eau \u1edf post #2 v\u00e0 #3.<\/p>\n

Thi\u1ebft k\u1ebf m\u1ea1ch \u0111\u1ec7m tr\u01b0\u1edbc<\/span> (v.d\u1ee5 nh\u01b0 post #3), v\u00e0 l\u1ea5y t\u00edn hi\u1ec7u t\u1eeb \u0111\u00f3 \u0111i\u1ec1u khi\u1ec3n c\u00e1c module kh\u00e1c. Trong qu\u00e1 tr\u00ecnh code v\u00e0 test th\u1eed, h\u1ea1n ch\u1ebf l\u1ea5y I\/O c\u1ee7a MCU c\u1eafm lung tung. C\u1ee9 ph\u1ea3i l\u00e0m m\u1ea1ch \u0111\u1ec7m tr\u01b0\u1edbc (nh\u1eafc \u0111i v\u00e0 nh\u1eafc l\u1ea1i t\u1eeb post #3 sang post #4)<\/p>\n

(n\u1ebfu d\u00f9ng 74HC595<\/span> \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n LEDs th\u00ec l\u1ea5y c\u00e1c ch\u00e2n SPI t\u1eeb MCU n\u1ed1i sang lu\u00f4n, kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u1ec7m, v\u00ec c\u00e1c ch\u00e2n n\u00e0y ch\u1ec9 th\u1ef1c hi\u1ec7n communication, kh\u00f4ng ti\u00eau th\u1ee5 nhi\u1ec1u d\u00f2ng).<\/p>\n

5 – Kh\u00f4ng d\u00f9ng module Hibernate c\u1ee7a M4,<\/span><\/span> kh\u00f4ng n\u1ea1p code test module n\u00e0y (h\u00ecnh nh\u01b0 l\u00e0 Lab6) v\u00e0o chip.<\/p>\n

Khi chuy\u1ec3n ch\u1ebf \u0111\u1ed9 sang hibernate, chip c\u00f3 th\u1ec3 kh\u00f4ng wake up \u0111\u01b0\u1ee3c, ngh\u1ec9 x\u00e0i lu\u00f4n. \":gach<\/p>\n

6 – Nh\u1eb9 nh\u00e0ng v\u00e0 m\u1ec1m m\u1ea1i, \u0111\u1ed1i x\u1eed d\u1ecbu d\u00e0ng v\u1edbi KIT<\/span><\/span><\/p>\n

C\u00e1c linh ki\u1ec7n tr\u00ean board \u0111\u1ec1u l\u00e0 linh ki\u1ec7n d\u00e1n, nh\u1ecf b\u00e9 n\u00ean n\u1ebfu b\u1ea1n thao t\u00e1c qu\u00e1 th\u00f4 b\u1ea1o s\u1ebd l\u00e0m ch\u00fang n\u00f3 bong tr\u00f3c, s\u00fat ra,…<\/p>\n

\u0110\u1eb7c bi\u1ec7t l\u00e0 jack micro-USB, khi th\u00e1o c\u00e1p ph\u1ea3i th\u1eadt d\u1ecbu d\u00e0ng, kh\u00f4ng \u0111\u01b0\u1ee3c l\u1eafc, m\u1ed9t tay gi\u1eef jack-female (tr\u00ean board), 1 tay r\u00fat c\u00e1p, nh\u1eb9 nh\u00e0ng v\u00e0 tho\u1ea3i m\u00e1i \":D<\/p>\n

N\u1ebfu c\u1eafm ngu\u1ed3n m\u00e0 \u0111\u00e8n LED ngu\u1ed3n kh\u00f4ng s\u00e1ng<\/span><\/span>, \u0111\u1ed3ng th\u1eddi c\u00f3 g\u00ec \u0111\u00f3 n\u00f3ng l\u00ean<\/span> (MCU, IC ngu\u1ed3n,…) th\u00ec th\u00f4i, r\u00fat ngu\u1ed3n ra, \u0111em l\u00ean support b\u00e1o c\u00e1o t\u00ecnh tr\u1ea1ng b\u1ec7nh.<\/p>\n","protected":false},"excerpt":{"rendered":"

Sau t\u00ecnh h\u00ecnh c\u1ee9u ch\u1eefa v\u00e0i ca chi\u1ec1u nay, v\u00e0 c\u00f3 v\u00e0i ca b\u00e1c s\u0129 b\u00f3 tay, BTC ph\u1ea3i c\u00f4ng b\u1ed1 c\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u1ea9n c\u1ea5p v\u00e0 nh\u1eefng \u0111i\u1ec1u c\u00e1c b\u1ea1n c\u1ea7n ph\u1ea3i ch\u00fa \u00fd khi s\u1eed d\u1ee5ng M\u1ea1ch M4 Launchpad (c\u0169ng nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i KIT kh\u00e1c) \u0111\u1ec3 tr\u00e1nh h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng N\u1ed9i dung \u0111ang \u0111\u01b0\u1ee3c up d\u1ea7n l\u00ean, c\u00e1c b\u1ea1n theo d\u00f5i \u0111\u1ec3 ph\u00f2ng tr\u00e1nh tai n\u1ea1n th\u1ea3m kh\u1ed1c li\u00ean quan \u0111\u1ebfn t\u00ednh m\u1ea1ng 1 \u2013 N\u1ebfu c\u1ea7n h\u00e0n th\u00eam header cho c\u00e1c ch\u00e2n c\u00f2n tr\u1ed1ng: D\u00f9ng lo\u1ea1i header \u0111\u1ef1c, \u0111\u01a1n, lo\u1ea1i d\u00e0i. \u0110\u1ea9y \u0111\u1ebf nh\u1ef1a \u2026<\/p>\n

Continue reading<\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1967,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2246","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/pages\/2246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/comments?post=2246"}],"version-history":[{"count":5,"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/pages\/2246\/revisions"}],"predecessor-version":[{"id":2598,"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/pages\/2246\/revisions\/2598"}],"up":[{"embeddable":true,"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/pages\/1967"}],"wp:attachment":[{"href":"https:\/\/payitforward.edu.vn\/wordpress\/wp-json\/wp\/v2\/media?parent=2246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}