Kev Ntsuas Hluav Taws Xob Siv HMC5883 thiab Particle Photon: 4 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

HMC5883 yog lub ntsuas hluav taws xob digital tsim los rau kev tshawb fawb qis hauv ntiaj teb. Cov cuab yeej no muaj ntau yam sib nqus sib nqus ntawm +/- 8 Oe thiab qhov tso tawm ntawm 160 Hz. HMC5883 lub ntsuas suav nrog kev siv lub pluaj tsis siv neeg lub pluaj tsav tsheb, tshem tawm kev tshem tawm, thiab 12-ntsis ADC uas ua rau 1 ° txog 2 ° ntsuas qhov ntsuas qhov tseeb. Txhua I²C Mini Modules tau tsim los ua haujlwm ntawm 5VDC.

Hauv qhov kev qhia no, peb tab tom yuav piav qhia ntxaws txog kev ua haujlwm ntawm HMC5883 nrog cov duab me me. Particle photon yog pawg thawj coj saib xyuas uas xa thiab txais cov ntaub ntawv los ntawm lub vev xaib, uas txhawb nqa qhov tseem ceeb tshaj plaws ntawm Internet Ntawm Yam (IoT).

Kauj Ruam 1: Yuav Tsum Kho Vajtse:

Cov ntaub ntawv uas peb xav tau kom ua tiav peb lub hom phiaj suav nrog cov khoom siv hauv qab no:

1. HMC5883

2. Particle Photon

3. I2C Cable

4. I2C Shield rau Particle Photon

Kauj ruam 2: Khoos phis tawj sib txuas:

Tshooj khoos phis tawj sib txuas ntu piav qhia qhov txuas txuas txuas uas xav tau ntawm lub sensor thiab cov duab photon. Ua kom muaj kev sib txuas raug yog qhov tseem ceeb xav tau thaum ua haujlwm ntawm ib qho system rau qhov xav tau cov zis. Yog li, qhov xav tau kev sib txuas yog raws li hauv qab no:

HMC5883 yuav ua haujlwm dhau I2C. Nov yog qhov piv txwv kab hluav taws xob daim duab, qhia txog yuav ua li cas xaim txhua lub interface ntawm lub sensor.

Tawm-ntawm-lub thawv, lub rooj tsavxwm tau teeb tsa rau I2C interface, zoo li peb pom zoo siv qhov kev sib txuas no yog tias koj tsis ntseeg lwm yam. Txhua yam koj xav tau yog plaub lub xov hlau!

Tsuas yog plaub qhov kev sib txuas xav tau Vcc, Gnd, SCL thiab SDA tus pin thiab cov no txuas nrog kev pab ntawm I2C cable.

Cov kev sib txuas no tau qhia hauv cov duab saum toj no.

Kauj Ruam 3: Txoj Cai Los Ntsuas Kev Sib Nqus Sib Nqus:

Cia peb pib nrog cov lej me me tam sim no.

Thaum siv lub ntsuas ntsuas nrog Arduino, peb suav nrog application.h thiab lub tsev qiv ntawv spark_wiring_i2c.h. "application.h" thiab lub tsev qiv ntawv spark_wiring_i2c.h muaj cov haujlwm uas pab txhawb kev sib txuas lus i2c ntawm lub sensor thiab cov khoom me me.

Tag nrho cov cai hauv qab no tau muab rau hauv qab no kom yooj yim ntawm tus neeg siv:

#suav nrog

#suav nrog

// HMC5883 I2C chaw nyob yog 0x1E (30)

#define Ntxiv 0x1E

int xMag = 0, yMag = 0, zMag = 0;

void teeb tsa ()

{

// Teem sib txawv

Particle.variable ("i2cdevice", "HMC5883");

Particle.variable ("xMag", xMag);

Particle.variable ("yMag", yMag);

Particle.variable ("zMag", zMag);

// Pib I2C kev sib txuas lus li MASTER

Hlau.begin ();

// Initialise Serial Communication, teeb baud tus nqi = 9600

Serial.begin (9600);

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv configure register A.

Hlau.write (0x00);

// Teeb tsa kev ntsuas ntsuas ib txwm muaj, cov ntaub ntawv tso tawm tus nqi = 0.75Hz

Hlau.write (0x60);

// Nres I2C Kev Kis

Wire.endTransmission ();

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv hom sau npe

Hlau.write (0x02);

// Teeb ntsuas ntsuas tas mus li

Hlau.write (0x00);

// Nres I2C Kev Kis

Wire.endTransmission ();

ncua (300);

}

void lub voj ()

{

unsigned int cov ntaub ntawv [6];

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv cov ntaub ntawv sau npe

Hlau.write (0x03);

// Nres I2C Kev Kis

Wire.endTransmission ();

// Thov 6 bytes ntawm cov ntaub ntawv

Wire.requestFrom (Addr, 6);

// Nyeem 6 bytes ntawm cov ntaub ntawv

// xMag msb, xMag lsb, zMag msb, zMag lsb, yMag msb, yMag lsb

yog (Wire.available () == 6)

{

cov ntaub ntawv [0] = Wire.read ();

cov ntaub ntawv [1] = Wire.read ();

cov ntaub ntawv [2] = Wire.read ();

cov ntaub ntawv [3] = Wire.read ();

cov ntaub ntawv [4] = Wire.read ();

cov ntaub ntawv [5] = Wire.read ();

}

ncua (300);

// Hloov cov ntaub ntawv

xMag = ((data [0] * 256) + data [1]);

yog (xMag> 32767)

{

xMag -= 65536;

}

zMag = ((cov ntaub ntawv [2] * 256) + cov ntaub ntawv [3]);

yog (zMag> 32767)

{

zMag -= 65536;

}

yMag = ((data [4] * 256) + data [5]);

yog (yMag> 32767)

{

yMag -= 65536;

}

// Tso tawm cov ntaub ntawv rau dashboard

Particle.publish ("Magnetic Field in X-Axis:", String (xMag));

ncua (1000);

Particle.publish ("Magnetic Field in Y-Axis:", String (yMag));

ncua (1000);

Particle.publish ("Magnetic Field in Z-Axis:", String (zMag));

ncua (1000);

}

Particle.variable () muaj nuj nqi tsim cov kev hloov pauv kom khaws cov zis tawm ntawm lub sensor thiab Particle.publish () muaj nuj nqi qhia cov zis ntawm lub dashboard ntawm lub xaib.

Cov zis sensor tau pom hauv daim duab saum toj no rau koj siv.

Kauj Ruam 4: Cov ntawv thov:

HMC5883 yog qhov ua haujlwm saum npoo av, ntau txheej txheej tsim rau kev sib nqus hauv ntiaj teb pom nrog lub ntsej muag digital rau cov ntawv thov xws li tus nqi qis thiab kev ntsuas hluav taws xob. Nws ib txog rau ob qib qib qib raug thiab qhov tseeb ua rau Cov Neeg taug Kev Taw Qhia thiab LBS Cov Ntawv Thov.