cmps03_sheet by Kritsada Jaiyen

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

CMPS03 Digital Compass Module âÁ´Ù Å à¢ç Á ·Ô È ´Ô ¨Ô µ ÍÅ

Distributed by Innovative Experiment Co.,Ltd., Thailand

¤Ø³ÊÁºÑµÔ ãª ä¿àÅÕÂé § +5V µ Í§¡ÒÃ¡ÃÐáÊä¿¿ Ò 20mA l ãª µÇ Ñ µÃÇ¨¨ÑºÊ¹ÒÁáÁ àËÅç¡àºÍÃ KMZ51 ¢Í§ Philips ¨íÒ¹Ç¹ 2 µÑÇ à¾×Íè ãË ÊÒÁÒÃ¶µÃÇ¨¨ÑºÊ¹ÒÁ áÁ àËÅç¡âÅ¡ä´ ÍÂ Ò§ÊÁºÙÃ³ áÅÐÁÕ¤ÇÒÁÅÐàÍÕÂ´ÁÒ¡à¾ÕÂ§¾Í l ¤ÇÒÁÅÐàÍÕÂ´¢Í§ÁØÁ 0.1 Í§ÈÒ l ¤ Ò¤ÇÒÁ¼Ô´¾ÅÒ´ 3-4 Í§ÈÒ â´Â»ÃÐÁÒ³ ËÅÑ§¨Ò¡¡ÒÃ»ÃÑºáµ § l àÍÒµ ¾µ Ø áººÊÑÒ³¾ÑÅÊ ¤ÇÒÁ¡Ç Ò§ 1 ¶Ö§ 37 ÁÔÅÅÔÇ¹Ô Ò·Õ â´ÂÁÕÍµÑ ÃÒà¾ÔÁè ¤ÃÑ§é ÅÐ 0.1 ÁÔÅÅÔÇ¹Ô Ò·Õ l àÍÒµ ¾µ Ø ¢ ÍÁÙÅ´Ô¨µÔ ÍÅ¼ Ò¹¡ÒÃµÔ´µ ÍÃÐºººÑÊ I2C ÃÍ§ÃÑºÊÑÒ³¹ÒÌ ¡Ò¤ÇÒÁ¶ÕÊè §Ù ¶Ö§ 1MHz â´ÂãË ¢Í ÁÙÅ 2 ÃÙ»áºº¤×Í 0-255 áÅÐ 0-3599 l ¢¹Ò´àÅç¡à¾ÕÂ§ 32 x 35 ÁÔÅÅÔàÁµÃ l Ê×Í è ÊÒÃ¡ÑºäÁâ¤Ã¤Í¹â·ÃÅàÅÍÃ ÂÍ´¹ÔÂÁä´ ·¡Ø µÃÐ¡ÙÅ ÍÒ·Ô àºÊÔ¡áÊµÁ» 2SX/2P, PIC, MCS-51, PSoC, 68HC11 ·Ñ§é ¼ Ò¹ÃÐºººÑÊ I2C áÅÐ´ ÇÂ¡ÒÃÇÑ´ÊÑÒ³¾ÑÅÊ l

ÍØ»¡Ã³ àÊÃÔÁ ºÍÃ ´ ADX-CMPS03 «Ö§è à» ¹ºÍÃ ´ÍÐá´»àµÍÃ ÊÒí ËÃÑºÍíÒ¹ÇÂÊÐ´Ç¡ã¹ ¡ÒÃàª×Íè Áµ Í¡ÑººÍÃ ´äÁâ¤Ã¤Í¹â·ÃÅàÅÍÃ áÅÐá¼§µ ÍÇ§¨ÃËÃ×ÍàºÃ´ºÍÃ ´ l

ÊÒÂ PCB3A ÊíÒËÃÑºàª×Íè Áµ Í¡ÑººÍÃ ´¤Çº¤ØÁËØ¹ Â¹µ ¢Í§ i-nex

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨ÔµÍÅ CMPS03 à» ¹¼Å§Ò¹¢Í§ Devantech (www.radio-electronics.co.uk) ÍÍ¡áººÁÒà¾×Íè ª ÇÂã¹¡ÒÃ¡íÒË¹´·ÔÈ·Ò§¡ÒÃà¤Å×Íè ¹·Õ¢è Í§ËØ¹ Â¹µ ÍµÑ â¹ÁÑµÔ áÅÐ¹íÒÁÒãª ã¹¡ÒÃÊÃ Ò§ à¤Ã×Íè §Á×ÍÇÑ´áÅÐµÃÇ¨ÊÍº·ÔÈÃÐººÍÔàÅç¡·ÃÍ¹Ô¡Ê â´ÂËÑÇã¨ÊíÒ¤Ñ¢Í§âÁ´ÙÅ CMPS03 ¤×Í µÑÇµÃÇ¨ ¨ÑºÊ¹ÒÁáÁ àËÅç¡àºÍÃ KMZ51 ¢Í§ Philips ¨íÒ¹Ç¹ 2 µÑÇ à¾×Íè ãË Á¤Õ ÇÒÁäÇà¾ÕÂ§¾Íã¹¡ÒÃµÃÇ¨¨Ñº Ê¹ÒÁáÁ àËÅç¡âÅ¡ (Earth magnetic field) áÅÐäÁâ¤Ã¤Í¹â·ÃÅàÅÍÃ à¾×Íè ÃÑºÊÑÒ³¨Ò¡µÑÇµÃÇ¨¨Ñº ÁÒ»ÃÐÁÇÅ¼Åà» ¹¢ ÍÁÙÅ´Ô¨ÔµÍÅáÅÐÊÑÒ³¾ÑÅÊ ÊíÒËÃÑºá¨ §¼Å¡ÒÃÇÑ´·ÔÈ·Ò§

1. µíÒáË¹ §¢ÒáÅÐ¡ÒÃµ Íãª §Ò¹ ã¹ÃÙ»·Õè 1 áÊ´§ÃÙ»Ã Ò§Ë¹ ÒµÒáÅÐ¡ÒÃ¨Ñ´¢Ò¢Í§ CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ ¨ÐàËç¹Ç Òà» ¹ á¼§Ç§¨Ã·ÕÁè ¤Õ Í¹à¹ç¡àµÍÃ µÍ ÍÍ¡ÁÒà¾×Íè ãË àª×Íè Áµ Íä»ãª §Ò¹ ÍÂ Ò§äÃ¡çµÒÁà¾×Íè ÍíÒ¹ÇÂ¤ÇÒÁÊÐ´Ç¡ á¡ ¼ãÙ ª §Ò¹¡ÑººÍÃ ´¤Çº¤ØÁËØ¹ Â¹µ ¢Í§ºÃÔÉ·Ñ ÍÔ¹â¹àÇµÕ¿ àÍç¡à¾ÍÃÔàÁ¹µ ¨íÒ¡Ñ´ (i-nex : à» ¹µÑÇá·¹ ¨íÒË¹ ÒÂÊÔ¹¤ Ò¢Í§ Devantech ã¹»ÃÐà·Èä·ÂÍÂ Ò§à» ¹·Ò§¡ÒÃ) ¨Ö§ä´ ¾Ñ²¹ÒºÍÃ ´ÍÐá´»àµÍÃ ÃØ ¹ ADX-CMPS03 à¾×Íè ãË ¹Òí âÁ´ÙÅ CMPS03 ÁÒµÔ´µÑ§é (â´ÂºÍÃ ´ ADX-CMPS03 µ Í§¨Ñ´«×Íé áÂ¡) º¹ºÍÃ ´ ADX-CMPS03 ä´ ¨´Ñ àµÃÕÂÁ¤Í¹à¹ç¡àµÍÃ PCB 3 ¢ÒµÑÇ¼ÙÊ Òí ËÃÑºàª×Íè Áµ Í¡ÑººÍÃ ´ ¤Çº¤ØÁËØ¹ Â¹µ áÅÐ¤Í¹à¹ç¡àµÍÃ IDC µÑÇàÁÕÂá¶Çà´ÕÂè Ç 4 ¢ÒÊíÒËÃÑºàÊÕÂºÊÒÂµ ÍÇ§¨ÃàºÍÃ AWG#22 à¾×Íè µ Í¡Ñºá¼§µ ÍÇ§¨ÃËÃ×ÍàºÃ´ºÍÃ ´ ¹Í¡¨Ò¡¹Ñ¹é ÂÑ§ÁÕÊÇÔµª ¡´ÊíÒËÃÑº»ÃÑºµÑ§é ¤ Ò (calibration) à¾×Íè ¡íÒË¹´µíÒáË¹ §·ÔÈÍ Ò§ÍÔ§ â´ÂÇ§¨Ã¢Í§ºÍÃ ´ ADX-CMPS03 áÊ´§ã¹ÃÙ»·Õè 2 µÑÇµÃÇ¨¨ÑºÊ¹ÒÁáÁ àËÅç¡ KMZ51 äÁâ¤Ã¤Í¹â·ÃÅàÅÍÃ ËÅÑ¡ÊíÒËÃÑº»ÃÐÁÇÅ¼Å ¡ÃÒÇ´ äÁ µ Íãª §Ò¹ ¤ÇÒÁ¶Õè 50/60Hz »ÃÑºµÑ§é ¤ Ò¡ÒÃÇÑ´ äÁ µ Íãª §Ò¹ àÍÒµ ¾µØ áººÊÑÒ³¾ÑÅÊ SDA ÊíÒËÃÑºàª×Íè Áµ Í¼ Ò¹ÃÐºººÑÊ I2C SCL ÊíÒËÃÑºàª×Íè Áµ Í¼ Ò¹ÃÐºººÑÊ I2C +5V ´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅ CMPS03

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CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

33.0mm

ADX-CMPS03

K1 SCL

R1 4.7k

S1 CAL

K4 I2C BUS

front +5V SCL SDA CMPS-03 PWM Digital Compass NC CAL 50/60Hz NC GND

+5V

GND SCL SDA +5V

K3 PWM

28.6mm

31.5mm 26.7mm

>31.5mm

K2 SDA

R2 4.7k

PWM

>33.0mm

¤Í¹à¹ç¡àµÍÃ µÑÇàÁÕÂ ÊíÒËÃÑºµÔ´µÑ§é âÁ´ÙÅ CMPS03

¤Í¹à¹ç¡àµÍÃ PCB ¢Í§ ÊÑÒ³ÃÐºººÑÊ I2C

GND

¨Ø´µ ÍÊÑÒ³¢Í§ÃÐºººÑÊ I2C ÊíÒËÃÑºàÊÕÂºÊÒÂµ ÍÇ§¨Ãà¾×èÍãª ¡ÑººÍÃ ´·´ÅÍ§ËÃ×Í á¼§µ ÍÇ§¨Ã (àºÃ´ºÍÃ ´) ÊÇÔµª ¡´µÔ´»Å ÍÂ´ÑºÊíÒËÃÑº»ÃÑºáµ §à¾×Íè ËÒµíÒáË¹ § Í Ò§ÍÔ§ (calibration) ¤Í¹à¹ç¡àµÍÃ PCB ¢Í§àÍÒµ ¾µØ ÊÑÒ³¾ÑÅÊ

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2. ¡ÒÃ»ÃÑºáµ §¤ Ò·ÔÈ·Ò§Í Ò§ÍÔ§á¡ âÁ´ÙÅ CMPS03

à¾×Íè ãË ¡ÒÃÇÑ´·ÔÈ·Ò§¢Í§âÁ´ÙÅ CMPS03 ÁÕ¤ÇÒÁáÁ ¹ÂíÒÁÒ¡·ÕÊè ´Ø ¨Ö§ÁÕÍ¹Ô ¾ØµÊíÒËÃÑº»ÃÑºáµ § ¤ Ò·Ô·Ò§Í Ò§ÍÔ§ ·Ñé§¹Õé¾×èÍ»ÃÐâÂª¹ ã¹¡ÒÃ¡íÒË¹´·ÔÈ·Ò§Í Ò§ÍÔ§à©¾ÒÐÊíÒËÃÑº¼Ù ãª §Ò¹ â´Âµ Í§» Í¹ ÊÑÒ³ÅÍ¨Ô¡ 0 à¢ Ò·Õ¢è ÒÍÔ¹¾ØµÊíÒËÃÑº»ÃÑºáµ §âÁ´ÙÅ CMPS03 «Ö§è ¡ç¤Í× ¢Ò 6 ËÒ¡ãª ºÍÃ ´ ADXCMPS03 ¡ÑºâÁ´ÙÅ CMPS03 ¨ÐÁÕÊÇÔµª ¡´µÔ´»Å ÍÂ´ÑºµÔ´µÑ§é äÇ ãË áÅ Ç ¡ÒÃ»ÃÑºáµ §ÁÕ¢¹Ñé µÍ¹´Ñ§¹Õé (1) ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈàË¹×Í ¡´ÊÇÔµª 1 ¤ÃÑ§é (2) ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈµÐÇÑ¹ÍÍ¡ ¡´ÊÇÔµª (3) ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈãµ ¡´ÊÇÔµª 1 ¤ÃÑ§é (4) ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈµÐÇÑ¹µ¡ ¡´ÊÇÔµª à» ¹ÍÑ¹ÊÔ¹é ÊØ´¡ÒÃ»ÃÑºµÑ§é ¤ Ò·ÔÈ·Ò§Í Ò§ÍÔ§¢Í§âÁ´ÙÅ CMPS03 â´ÂâÁ´ÙÅ¨Ðà¡çº¤ ÒÍ Ò§ÍÔ§¹Õäé Ç ã¹Ë¹ ÇÂ¤ÇÒÁ¨íÒÍÕÍÕ¾ÃÍÁáÅÐäÁ µ Í§»ÃÑºµÑé§¤ ÒãËÁ ÍÕ¡àÁ×èÍ¨ ÒÂä¿àÅÕéÂ§¤ÃÑé§ãËÁ

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

3. ¡ÒÃÍ Ò¹¤ ÒÊÑÒ³àÍÒµ ¾µØ ¢Í§âÁ´ÙÅ CMPS03 3.1 ¡ÒÃÍ Ò¹¤ Ò·ÔÈ·Ò§¨Ò¡àÍÒµ ¾µØ ÊÑÒ³¾ÑÅÊ ¡ÒÃÍ Ò¹¤ ÒÊÑÒ³ã¹âËÁ´¹Õé à» ¹¡ÒÃ¹íÒ¤ Ò¤ÇÒÁ¡Ç Ò§¾ÑÅÊ ·Õèä´ ¨Ò¡àÍÒµ ¾ØµÊÑÒ³¾ÑÅÊ ¢Í§âÁ´ÙÅ CMPS03 ÁÒÃÐºØµÒí áË¹ §Í§ÈÒ ¨Ò¡ 0 ¶Ö§ 359.9 Í§ÈÒ â´ÂÁÕÂÒ ¹¢Í§¤ Ò¤ÇÒÁ¡Ç Ò§ÊÑÒ³ ¾ÑÅÊ ¨Ò¡ 1 ÁÔÅÅÔÇ¹Ô Ò·Õä»¨¹¶Ö§ 36.99 ÁÔÅÅÔÇ¹Ô Ò·Õ ÁÕ¤ÇÒÁÅÐàÍÕÂ´ 0.1 ÁÔÅÅÔÇ¹Ô Ò·ÕµÍ Í§ÈÒ ã¹ÊÑÒ³ ¾ÑÅÊ áµ ÅÐä«à¡ÔÅ ÁÕªÇ §ÅÍ¨Ô¡ 0 ¡Ç Ò§ 65 ÁÔÅÅÔÇ¹Ô Ò·Õ ´Ñ§¹Ñé¹ã¹¡ÒÃ¹íÒÊÑÒ³¾ÑÅÊ ÁÒ»ÃÐÁÇÅ¼Åà» ¹¤ ÒÁØÁ ¨Ö§µ Í§ãª ¡ÒÃ¹Ñº¤ÇÒÁ¡Ç Ò§¢Í§ ÊÑÒ³¾ÑÅÊ à» ¹ËÅÑ¡ã¹¡ÒÃ¤íÒ¹Ç³ËÒ¤ ÒÁØÁ·Õâè Á´ÙÅ CMPS03 ÇÑ´ä´

3.1.1 µÑÇÍÂ Ò§â»Ãá¡ÃÁ·Õãè ª ¤Çº¤ØÁÊíÒËÃÑºàºÊÔ¡áÊµÁ» 2SX áÅÐ i-Stamp ¡ÒÃãª §Ò¹Ã ÇÁ¡ÑºàºÊÔ¡áÊµÁ» 2SX áÅÐ i-Stamp ¹Ñ¹é ¨Ðãª ¤Òí ÊÑ§è PULSIN ã¹¡ÒÃ¹ÑºÊÑÒ³ ¾ÑÅÊ â´Â¨Ðà¾ÔÁè ¤ Ò¡ÒÃ¹Ñº¢Ö¹é ·Ø¡æ 0.8 äÁâ¤ÃÇÔ¹Ò·Õ ´Ñ§¹Ñ¹é ·Õ¤è ÇÒÁ¡Ç Ò§¢Í§¾ÑÅÊ ·Õè 1 ÁÔÅÅÔÇ¹Ô Ò·ÕÊÒí ËÃÑº µíÒáË¹ § 0 Í§ÈÒ àºÊÔ¡áÊµÁ» 2SX áÅÐ i-Stamp ¨Ð¹Ñº¤ Òä´ à· Ò¡Ñº 1,250 ¨Ö§ÊÒÁÒÃ¶ãª ¤Ò ¹Õàé » ¹¨Ø´ Í Ò§ÍÔ§·Õè 0 Í§ÈÒ àÁ×Íè µ Í§¡ÒÃ·ÃÒº¤ ÒÁØÁ·Õáè Á ¨ÃÔ§ ãË ¹Òí ¤ ÒÁØÁ·Õ¹è ºÑ ä´ Åº´ ÇÂ 1,250 áÅ ÇËÒÃ´ ÇÂ 125 ¡ç¨Ðä´ ¤Ò ÁØÁã¹Ë¹ ÇÂÍ§ÈÒ·Õµè Í §¡ÒÃ ÃÒÂÅÐàÍÕÂ´¢Í§â»Ãá¡ÃÁáÊ´§ã¹â»Ãá¡ÃÁ·Õè 1 ·Õ¤è ÇÒÁ¡Ç Ò§¾ÑÅÊ Ê§Ù ÊØ´¤×Í 36.99 ÁÔÅÅÔÇ¹Ô Ò·Õ ¤ Ò·Õ¹è ºÑ ä´ ¨Ò¡¤íÒÊÑ§è PULSIN à· Ò¡Ñº 46,237 àÁ×Íè Åº´ ÇÂ 1,250 áÅ ÇËÒÃ´ ÇÂ 125 à¾×Íè á»Å§à» ¹Í§ÈÒ ¤ ÒÊÙ§ÊØ´·Õáè Ê´§à» ¹¼ÅÅÑ¾¸ ä´ ¤Í× 359 à» ¹¤ Ò Ë¹ ÇÂÍ§ÈÒÊÙ§ÊØ´¹Ñè¹àÍ§ ËÁÒÂàËµØ ã¹ºÒ§¡Ã³Õ ¤ Ò·ÕÍè Ò ¹ä´ Ê§Ù ÊØ´¨Ò¡¤íÒÊÑ§è PULSIN ÍÒ¨äÁ ¶§Ö 46,237 ¼Ùã ª §Ò¹ÊÒÁÒÃ¶ »ÃÑºà»ÅÕÂè ¹¡ÒÃ¤íÒ¹Ç³ãËÁ ãË ä´ ÁÁØ à» ¹ 359.9 Í§ÈÒä´ '{$STAMP BS2sx} '{$PBASIC 2.5} bearing VAR WORD main: PULSIN 4, 1, bearing bearing = (bearing-1250)/125 DEBUG "Compass Bearing

' Get reading ' BS2sx - Calculate Bearing ' in degrees ", DEC3 bearing ,CR ' Display Compass Bearing

GOTO main

â»Ãá¡ÃÁ·Õè 1 áÊ´§¡ÒÃÍ Ò¹¤ ÒÊÑÒ³¾ÑÅÊ ¨Ò¡âÁ´ÙÅ CMPS03

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

µíÒáË¹ §ÃÕ¨ÔÊàµÍÃ ÃÒÂÅÐàÍÕÂ´ 0 µÑÇàÅ¢áÊ´§ÃØ ¹¢Í§ºÍÃ ´ CMP03 1 Ê §¤ ÒµíÒáË¹ §áººËÂÒº (0-255) Ê §¤ ÒµíÒáË¹ §áººÅÐàÍÕÂ´´ ÇÂµÑÇàÅ¢ 16 ºÔµ (0-3599) 2,3 ÊÒÁÒÃ¶á»Å§¤ Òà¾×èÍáÊ´§Í§ÈÒ 0-359.9 Í§ÈÒä´ â´ÂµÃ§ ÊíÒËÃÑºµÃÇ¨ÊÍº¤ ÒÀÒÂã¹ â´Â¨ÐáÊ´§¤ Ò¤ÇÒÁµ Ò§¢Í§ 4,5 Sensor1 à» ¹µÑÇàÅ¢ 16 ºÔµáºº¤Ô´à¤Ã×èÍ§ËÁÒÂ ÊíÒËÃÑºµÃÇ¨ÊÍº¤ ÒÀÒÂã¹ â´Â¨ÐáÊ´§¤ Ò¤ÇÒÁµ Ò§¢Í§ 6,7 Sensor2 à» ¹µÑÇàÅ¢ 16 ºÔµáºº¤Ô´à¤Ã×èÍ§ËÁÒÂ áÊ´§¤ ÒµÑÇàÅ¢¡ÒÃ»ÃÑºáµ §ÀÒÂã¹ (calibration value1) 8,9 à» ¹µÑÇàÅ¢ 16 ºÔµáºº¤Ô´à¤Ã×èÍ§ËÁÒÂ áÊ´§¤ ÒµÑÇàÅ¢¡ÒÃ»ÃÑºáµ §ÀÒÂã¹ (calibration value2) 10,11 à» ¹µÑÇàÅ¢ 16 ºÔµáºº¤Ô´à¤Ã×èÍ§ËÁÒÂ 12,13 äÁ ãª §Ò¹Í Ò¹¤ Òä´ à» ¹ 0 14 äÁ ãª §Ò¹ äÁ ä´ ¡íÒË¹´¤ ÒäÇ ¤íÒÊÑè§ÊíÒËÃÑº¡ÒÃ»ÃÑºáµ §¤ Ò â´ÂàÁ×èÍµ Í§¡ÒÃ»ÃÑºáµ §¤ Ò 15 µ Í§à¢ÕÂ¹¢ ÍÁÙÅ 255 à¢ Ò·ÕèÃÕ¨ÔÊàµÍÃ µíÒáË¹ §¹Õé

µÒÃÒ§·Õè 1 áÊ´§µíÒáË¹ §ÃÕ¨ÊÔ àµÍÃ ÀÒÂã¹âÁ´ÙÅ CMPS03

3.2 ¡ÒÃÍ Ò¹¤ Ò·ÔÈ·Ò§à» ¹¢ ÍÁÙÅ´Ô¨µÔ ÍÅ¼ Ò¹ÃÐºººÑÊ I2C ¡ÒÃÍ Ò¹¤ Ò¨Ò¡âÁ´ÙÅ CMPS03 ãË ä´ ¤Ò ·ÕÁè ¤Õ ÇÒÁáÁ ¹ÂíÒÊÙ§¤ÇÃàÅ×Í¡àÍÒµ ¾µØ ¢ ÍÁÙÅ´Ô¨µÔ ÍÅ¼ Ò¹ ÃÐºººÑÊ I2C â´ÂâÁ´ÙÅ CMPS03 ÊÒÁÒÃ¶Ê §¢ ÍÁÙÅ¢Í§µíÒáË¹ §ÍÍ¡ÁÒ·Õ¤è ÇÒÁÅÐàÍÕÂ´ÊÙ§ÊØ´ 0.1 Í§ÈÒâ´ÂäÁ ¨Òí à» ¹µ Í§ÁÕ¡ÒÃ¤íÒ¹Ç³ËÃ×Íá»Å§¤ Òã´ æ ÍÕ¡

3.2.1 ÃÙ»áºº¡ÒÃÊ×Íè ÊÒÃ¢ ÍÁÙÅºÑÊ I2C ºÑÊ I2C àª×Íè Áµ Í¡ÑºäÁâ¤Ã¤Í¹â·ÃÅàÅÍÃ â´Âãª ÊÒÂÊÑÒ³ 2 àÊ ¹ä´ á¡ ¢Ò SDA (ÃÑºáÅÐ Ê §¢ ÍÁÙÅ) áÅÐ SCL (¢ÒÊÑÒ³¹ÒÌ ¡Ò) â´Â¢ÒÊÑÒ³·Ñ§é ÊÍ§¨Ðµ Í§µ ÍµÑÇµ Ò¹·Ò¹¾ÙÅÍÑ»µ ÍäÇ à¾×Íè ¡íÒË¹´Ê¶Ò¹ÐÅÍ¨Ô¡ 1 ãË ¡ºÑ ÃÐºººÑÊ

3.2.2 ÅíÒ´Ñº¢Ñ¹é ¡ÒÃµÔ´µ Í ¤ ÒáÍ´à´ÃÊ¢Í§âÁ´ÙÅ CMPS03 ¤×Í $C0 ÊíÒËÃÑº¡ÒÃÊ §¢ ÍÁÙÅ áÅÐ $C1 ÊíÒËÃÑº¡ÒÃÍ Ò¹¤ Ò ¢ ÍÁÙÅ â´Â¢Ñ¹é µÍ¹¡ÒÃµÔ´µ Í¡ÑºâÁ´ÙÅ CMPS03 à¾×Íè Í Ò¹¢ ÍÁÙÅÁÕ´§Ñ ¹Õé

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

S tart B it

áÍ´à´ÃÊÊíÒËÃÑºÊ §¤ Ò¢ ÍÁÙÅä»ÂÑ§ CMPS03 = $CO 1

0 R /W A C K

Start bit

¢ ÍÁÙÅµíÒáË¹ §ÃÕ¨ÔÊàµÍÃ ·Õèµ Í§¡ÒÃÍ Ò¹¤ Ò

áÍ´à´ÃÊÊíÒËÃÑºÍ Ò¹¤ Ò¢ ÍÁÙÅ¨Ò¡ CMPS03 = $C1

ACK

Stop bit

¢ ÍÁÙÅ 8 ºÔµ·ÕèÍ Ò¹ä´ ¨Ò¡ CMPS03

R /W

ACK

ÃÙ»·Õè 3 áÊ´§ä·ÁÔ§è ä´ÍÐá¡ÃÁ¢Í§¡ÒÃµÔ´µ ÍÊ×Íè ÊÒÃ¡ÑºâÁ´ÙÅ CMPS03 ¼ Ò¹ÃÐºººÑÊ I2C 1. Ê §ºÔµàÃÔÁè µ ¹ËÃ×Í Start bit à¾×Íè á¨ §ãË ÃÐºººÑÊ I2C àµÃÕÂÁ¾Ã ÍÁÃÑº¢ ÍÁÙÅ CMPS03

2. Ê §¤ ÒáÍ´à´ÃÊ $C0 à¾×èÍÃÐºØÇ Òµ Í§¡ÒÃµÔ´µ Íà¾×èÍà¢ÕÂ¹¢ ÍÁÙÅä»ÂÑ§¡ÑºâÁ´ÙÅ

3. Ê §¤ ÒµíÒáË¹ §ÃÕ¨ÔÊàµÍÃ ÀÒÂã¹âÁ´ÙÅ CMPS03 ·Õèµ Í§¡ÒÃÍ Ò¹¤ Ò «Öè§ÁÕÃÒÂÅÐàÍÕÂ´ áÊ´§ã¹µÒÃÒ§·Õè 1 4. Ê §¤ ÒáÍ´à´ÃÊ $C1 à¾×Íè ÃÐºØÇÒ µ Í§¡ÒÃÍ Ò¹¤ Ò¢ ÍÁÙÅ¨Ò¡âÁ´ÙÅ CMPS03 5. Í Ò¹¤ Ò¢ ÍÁÙÅ¨Ò¡âÁ´ÙÅ CMPS03 ÁÒà¡çºäÇ ã¹Ë¹ ÇÂ¤ÇÒÁ¨íÒ 6. Ê §ºÔµËÂØ´ËÃ×Í Stop à¾×Íè ËÂØ´¡ÒÃÊ×Íè ÊÒÃ¢ ÍÁÙÅ áÅÐ¡íÒË¹´ãË ºÊÑ ÍÂÙã ¹ÊÀÒÇÐºÑÊÇ Ò§ ¨Ò¡ÅíÒ´Ñº¢Ñ¹é ¡ÒÃµÔ´µ ÍÊ×Íè ÊÒÃ¢ Ò§µ ¹ ÊÒÁÒÃ¶¹íÒÁÒà¢ÕÂ¹à» ¹â»Ãá¡ÃÁµÑÇÍÂ Ò§à¾×Íè Í Ò¹¢ ÍÁÙÅ ¨Ò¡âÁ´ÙÅ CMPS03 â´Âãª àºÊÔ¡áÊµÁ» 2SX ËÃ×Í i-Stamp ä´ ´§Ñ áÊ´§ã¹â»Ãá¡ÃÁ·Õè 2

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ '{$STAMP BS2sx} '{$PBASIC 2.5} SDA SCL WrCMPS03 RdCMPS03 Ack Nak i2cSDA i2cData REGISTER i2cWork i2cAck temp digits width

CON CON CON CON CON CON VAR VAR VAR VAR VAR VAR VAR VAR

6 7 $C0 $C1 0 1 NIB WORD BYTE BYTE BIT WORD NIB NIB

' ' ' ' ' ' ' ' ' ' ' '

I2C serial data line I2C serial clock line write to compass read from compass acknowledge bit no ack bit I2C serial data pin data to/from device register address work byte for TX routine Ack bit from device for rj printing

Init: PAUSE 250 i2cSDA = SDA ' define SDA pin REGISTER = 0 ' compass revision number GOSUB Read_Byte DEBUG 2,1,1, "Revision Number = " ,DEC2 i2cData Main: REGISTER = 1 ' Show Data 0-255 for 0-360 degree GOSUB Read_Byte ' Read Byte From I2C DEBUG 2,1,3, "The Coarse Data(0-255) = " ,DEC i2cData REGISTER = 2 ' get Data in degrees, 0.0 - 359.9 Degree GOSUB Read_Word DEBUG 2,1,5, "Position = ",DEC i2cData/10,".",DEC1 i2cData," Degree" PAUSE 250 GOTO Main ' Compass Access Subroutines ' Writes low byte of i2cData to REGISTER Write_Byte: GOSUB I2C_Start i2cWork = WrCMPS03 GOSUB I2C_TX_Byte ' send device address i2cWork = REGISTER GOSUB I2C_TX_Byte ' send register number i2cWork = i2cData.LOWBYTE GOSUB I2C_TX_Byte ' send the data GOSUB I2C_Stop RETURN ' Writes i2cData to REGISTER Write_Word: GOSUB I2C_Start i2cWork = WrCMPS03 GOSUB I2C_TX_Byte i2cWork = REGISTER GOSUB I2C_TX_Byte i2cWork = i2cData.HIGHBYTE GOSUB I2C_TX_Byte i2cWork = i2cData.LOWBYTE GOSUB I2C_TX_Byte GOSUB I2C_Stop RETURN

' send device address ' send register number ' send the data - high byte ' send the data - low byte

â»Ãá¡ÃÁ·Õè 2 â»Ãá¡ÃÁÍ Ò¹¤ Ò¨Ò¡âÁ´ÙÅ CMPS03 ¼ Ò¹ÃÐºººÑÊ I2C ¢Í§ i-Stamp (ÁÕµÍ )

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

' Read i2cData (8 bits) from REGISTER Read_Byte: GOSUB I2C_Start i2cWork = WrCMPS03 GOSUB I2C_TX_Byte i2cWork = REGISTER GOSUB I2C_TX_Byte GOSUB I2C_Start i2cWork = RdCMPS03 GOSUB I2C_TX_Byte GOSUB I2C_RX_Byte_Nak GOSUB I2C_Stop i2cData = i2cWork RETURN ' Read i2cData (16 bits) from REGISTER Read_Word: GOSUB I2C_Start i2cWork = WrCMPS03 GOSUB I2C_TX_Byte i2cWork = REGISTER GOSUB I2C_TX_Byte GOSUB I2C_Start i2cWork = RdCMPS03 GOSUB I2C_TX_Byte GOSUB I2C_RX_Byte i2cData.HIGHBYTE = i2cWork GOSUB I2C_RX_Byte_Nak GOSUB I2C_Stop i2cData.LOWBYTE = i2cWork RETURN ' Low Level I2C Subroutines 'Start I2C_Start: INPUT i2cSDA INPUT SCL LOW i2cSDA Clock_Hold: IF (INS.LOWBIT(SCL) = 0) THEN Clock_Hold RETURN 'Transmit I2C_TX_Byte: SHIFTOUT i2cSDA,SCL,MSBFIRST,[i2cWork\8] SHIFTIN i2cSDA,SCL,MSBPRE,[i2cAck\1] RETURN 'Receive I2C_RX_Byte_Nak: i2cAck = Nak GOTO I2C_RX I2C_RX_Byte: i2cAck = Ack I2C_RX: SHIFTIN i2cSDA,SCL,MSBPRE,[i2cWork\8] SHIFTOUT i2cSDA,SCL,LSBFIRST,[i2cAck\1] RETURN 'Stop I2C_Stop:

LOW i2cSDA INPUT SCL INPUT i2cSDA RETURN

' send compass address ' send register number ' repeat start (sets register) ' send read command ' return the data

' send compass address ' send register number ' repeat start (sets register) ' send read command ' read high byte of data ' read low byte of data

' I2C start bit sequence ' SDA -> low while SCL high ' device ready?

' send byte to device ' get acknowledge bit

' no Ack = high ' Ack = low ' get byte from device ' send ack or nak

' I2C stop bit sequence ' SDA --> high while SCL high

â»Ãá¡ÃÁ·Õè 2 â»Ãá¡ÃÁÍ Ò¹¤ Ò¨Ò¡âÁ´ÙÅ CMPS03 ¼ Ò¹ÃÐºººÑÊ I2C ¢Í§ i-Stamp (ÁÕµÍ )

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

ÃÙ»·Õè 4 áÊ´§Ë¹ Ò¨Í¢Í§ Debug terminal áÊ´§¢ ÍÁÙÅ·ÕÍè Ò ¹ä´ ¨Ò¡âÁ´ÙÅ CMPS03

3.2.3 ¡ÒÃ·íÒ§Ò¹¢Í§â»Ãá¡ÃÁ·Õè 2 µÔ´µ Í¡ÑºâÁ´ÙÅ CMPS03 ¼ Ò¹ÃÐºººÑÊ I2C ´ ÇÂ i-Stamp à¹×Íè §¨Ò¡àºÊÔ¡áÊµÁ» 2SX áÅÐ i-Stamp äÁ Á¤Õ Òí ÊÑ§è µÔ´µ Í¡ÑºÃÐºººÑÊ I2C ´Ñ§¹Ñ¹é â»Ãá¡ÃÁ µÔ´µ Í¡ÑºâÁ´ÙÅ CMPS03 ¼ Ò¹ÃÐºººÑÊ I2C ¨Ö§¤ Í¹¢ Ò§ÂÒÇ à¹×Íè §¨Ò¡µ Í§ÊÃ Ò§â»Ãá¡ÃÁÂ ÍÂÊíÒËÃÑº ¡ÒÃÊ×Íè ÊÒÃ¢ ÍÁÙÅ¡ÑºÃÐºººÑÊ I2C ËÅÑ§¨Ò¡¹Õ¼é ãÙ ª §Ò¹ÊÒÁÒÃ¶¹íÒâ»Ãá¡ÃÁÂ ÍÂ¹Õäé »»ÃÐÂØ¡µ ãª §Ò¹ ¡ÑºÍØ»¡Ã³ µÑÇÍ×è¹æ ·Õèä´ ãª ¡ÒÃµÔ´µ ÍÃÐºººÑÊ I2C ä´ ·Ñ¹·Õ ÊíÒËÃÑº¢Ñé¹µÍ¹¡ÒÃ·íÒ§Ò¹ËÅÑ¡æ ¢Í§â»Ãá¡ÃÁ·Õè 2 ÁÕ´§Ñ ¹Õé 1. ¡íÒË¹´ÃÕ¨ÊÔ àµÍÃ à» ¹ 0 à¾×Íè µÔ´µ ÍÍ Ò¹¤ ÒàÇÍÃ ª¹Ñ ¢Í§âÁ´ÙÅ CMPS03 ¨Ò¡¹Ñ¹é Í Ò¹ ¤ ÒÁÒáÊ´§·ÕËè ¹ Òµ Ò§ Debug terminal 2. ãË â»Ãá¡ÃÁÇ¹ÅÙ»·Õâè »Ãá¡ÃÁËÅÑ¡ ¨Ò¡¹Ñ¹é Ê §¤ ÒÃÕ¨ÊÔ àµÍÃ à· Ò¡Ñº 1 à¾×Íè Í Ò¹¤ Ò ¢ ÍÁÙÅáººËÂÒºÍÍ¡ÁÒ áÅ Ç¹íÒÁÒáÊ´§¼Å·ÕËè ¹ Òµ Ò§ Debug terminal 3. Ê §¤ ÒÃÕ¨ÊÔ àµÍÃ à· Ò¡Ñº 2 à¾×Íè Í Ò¹¤ Ò¢ ÍÁÙÅáººÅÐàÍÕÂ´ ¨Ò¡¹Ñ¹é ÊÑ§è Í Ò¹¤ Ò¢ ÍÁÙÅ¨Ò¡ ºÑÊ I2C áººàÇÔÃ´ (Í Ò¹¢ ÍÁÙÅÍÍ¡ÁÒ 16 ºÔµ ) 4. ¹íÒ¤ Ò¢ ÍÁÙÅ·Õäè ´ ËÒÃ´ ÇÂ 10 ¡ Í¹à¾×Íè á»Å§¤ Ò·Õäè ´ à» ¹Í§ÈÒ áÊ´§·ÕËè ¹ Òµ Ò§ Debug terminal ¨Ò¡¹Ñ¹é ¹íÒ¤ ÒËÅÑ¡ÊØ´· ÒÂÁÒáÊ´§ «Ö§è µíÒáË¹ §ÊØ´· ÒÂà» ¹µíÒáË¹ §¢Í§¨Ø´·È¹ÔÂÁ

CMPS03 âÁ´ÙÅà¢çÁ·ÔÈ´Ô¨µÔ ÍÅ

3.3.4 ¡ÒÃ»ÃÑºáµ §¤ Ò¢Í§âÁ´ÙÅ CMPS03 ¼ Ò¹·Ò§ÃÐºººÑÊ I2C ¡ÒÃ»ÃÑºáµ §¤ Ò·íÒä´ â´Â¡ÒÃÊ §¤ Ò 0xFF ä»ÂÑ§ÃÕ¨ÊÔ àµÍÃ 15 ¢Í§âÁ´ÙÅ CMPS03 â´Â¨Ðµ Í§ Ê §¤ Ò 4 ¤ÃÑ§é áÅÐÃÐºØ·ÈÔ ·Ò§ËÅÑ¡æ 4 ·ÔÈ·Ò§àª ¹à´ÕÂÇ¡Ñº¡ÒÃ¡íÒË¹´¤ Ò´ ÇÂÊÇÔµª â´ÂµÃ§ ÁÕ¢¹Ñé µÍ¹ ´Ñ§¹Õé 1. ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈàË¹×Í ¨Ò¡¹Ñ¹é à¢ÕÂ¹¤ Ò 255 (0xFF) ä»ÂÑ§ÃÕ¨ÊÔ àµÍÃ 15 2. ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×¹é ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈµÐÇÑ¹ÍÍ¡ à¢ÕÂ¹ ¤ Ò 255 (0xFF) ä»ÂÑ§ÃÕ¨ÊÔ àµÍÃ 15 3. ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×é¹ ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈãµ ¡´ÊÇÔµª à¢ÕÂ¹¤ Ò 255 (0xFF) ä»ÂÑ§ÃÕ¨ÊÔ àµÍÃ 15 4. ÇÒ§âÁ´ÙÅ CMPS03 ¢¹Ò¹¡Ñº¾×é¹ ËÑ¹´ Ò¹Ë¹ Ò¢Í§âÁ´ÙÅä»·Ò§·ÔÈµÐÇÑ¹µ¡ ¡´ ÊÇÔµª à¢ÕÂ¹¤ Ò 255 (0xFF) ä»ÂÑ§ÃÕ¨ÊÔ àµÍÃ 15 ËÅÑ§¨Ò¡»ÃÑºáµ §¤ ÒáÅ Ç¤ Ò·Õè»ÃÑºáµ §¨Ðà¡çºäÇ ·ÕèË¹ ÇÂ¤ÇÒÁ¨íÒÍÕÍÕ¾ÃÍÁ ´Ñ§¹Ñé¹áÁ äÁ ¨ ÒÂä¿ ãË ¡ºÑ µÑÇºÍÃ ´ ¢ ÍÁÙÅ·Õ»è ÃÑºáµ §áÅ Ç ¨ÐÂÑ§¤§ÍÂÙµ Í ä»

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