Kev Ntsuas Kev Ntsuas Siv BMA250 thiab Arduino Nano: 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

BMA250 yog qhov me me, nyias, lub zog loj, 3-axis accelerometer nrog kev ntsuas siab (13-ntsis) ntsuas txog li g 16 g. Cov ntaub ntawv tso tawm digital yog ua raws li 16-ntsis twos ua tiav thiab siv tau los ntawm I2C digital interface. Nws ntsuas qhov kev nrawm nrawm ntawm lub ntiajteb txawj nqus hauv kev thov qaij-nkag siab, nrog rau kev nrawm nrawm los ntawm kev txav lossis poob siab. Nws qhov kev daws teeb meem siab (3.9 mg/LSB) ua rau ntsuas ntsuas qhov xav tau hloov qis dua 1.0 °.

Hauv qhov kev qhia no peb yuav ntsuas qhov nrawm hauv txhua peb txoj kab uas hla uas siv BMA250 thiab Arduino Nano.

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. BMA250

2. Arduino Nano

3. I2C Cable

4. I2C Shield Rau Arduino Nano

Kauj ruam 2: Khoos phis tawj sib txuas:

Tshooj khoos phis tawj sib txuas ntu piav qhia qhov txuas txuas uas xav tau ntawm lub sensor thiab arduino. 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:

BMA250 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: Arduino Code rau Kev Ntsuas Kev Ntsuas:

Cia peb pib nrog Arduino code tam sim no.

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

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

#suav nrog

// BMA250 I2C chaw nyob yog 0x18 (24)

#define Ntxiv 0x18

void teeb tsa ()

{

// 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 thaj tsam xaiv sau npe

Hlau.write (0x0F);

// Teeb tsa ntau yam +/- 2g

Hlau.write (0x03);

// Nres I2C Kev Kis

Wire.endTransmission ();

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv bandwidth rau npe

Hlau.write (0x10);

// Teeb bandwidth 7.81 Hz

Hlau.write (0x08);

// Nres I2C Kev Kis

Wire.endTransmission (); ncua (300);}

void lub voj ()

{

unsigned int cov ntaub ntawv [0];

// Pib I2C Kev Kis

Wire.beginTransmission (Addr);

// Xaiv Cov Ntaub Ntawv Sau Npe (0x02 - 0x07)

Hlau.write (0x02);

// Nres I2C Kev Kis

Wire.endTransmission ();

// Thov 6 bytes

Wire.requestFrom (Addr, 6);

// Nyeem rau rau bytes

// xAccl lsb, xAccl msb, yAccl lsb, yAccl msb, zAccl lsb, zAccl msb

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 mus rau 10 khoom

ntab xAccl = ((data [1] * 256.0) + (data [0] & 0xC0)) / 64;

yog (xAccl> 511)

{

xAccl -= 1024;

}

ntab yAccl = ((data [3] * 256.0) + (data [2] & 0xC0)) / 64;

yog (yAccl> 511)

{

yAccl -= 1024;

}

ntab zAccl = ((data [5] * 256.0) + (data [4] & 0xC0)) / 64;

yog (zAccl> 511)

{

zAccl -= 1024;

}

// Tso tawm cov ntaub ntawv rau tus saib xyuas

Serial.print ("Ua kom nrawm hauv X-Axis:");

Serial.println (xAccl);

Serial.print ("Kev nrawm hauv Y-Axis:");

Serial.println (yAccl);

Serial.print ("Ua kom nrawm hauv Z-Axis:");

Serial.println (zAccl);

}

Hauv cov tsev qiv ntawv xaim Wire.write () thiab Wire.read () yog siv los sau cov lus txib thiab nyeem cov ntawv tso tawm. Serial.print () thiab Serial.println () yog siv los tso saib cov pa tawm ntawm cov saib xyuas ntawm Arduino IDE.

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

Kauj Ruam 4: Cov ntawv thov:

Accelerometers zoo li BMA250 feem ntau pom nws daim ntawv thov hauv kev ua si thiab tso saib cov ntaub ntawv hloov pauv. Qhov ntsuas qhov ntsuas no tseem ua haujlwm hauv kev tswj hwm lub zog zoo rau kev siv mobile. BMA250 yog lub triaxial digital acceleration sensor uas tau koom nrog nrog kev txawj ntse ntawm-nti cov lus tsa suab cuam tshuam kev tswj hwm.