Kev Ntsuas Siab Siv CPS120 thiab Raspberry Pi: 4 Cov Kauj Ruam

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

CPS120 yog qhov ua tau zoo thiab tus nqi qis capacitive tsis siab sensor nrog kev them nyiaj tag nrho. Nws siv hluav taws xob tsawg heev thiab suav nrog ib qho me me me me Micro-Electro-Mechanical Sensor (MEMS) rau ntsuas ntsuas. Sigma-delta raws ADC kuj tseem muaj nyob hauv nws kom ua tiav qhov xav tau ntawm cov nyiaj them poob haujlwm.

Hauv qhov kev qhia no kev cuam tshuam ntawm CPS120 sensor module nrog raspberry pi tau pom thiab nws cov phiaj xwm siv Java lus kuj tseem tau piav qhia. Txhawm rau nyeem qhov ntsuas qhov ntsuas siab, peb tau siv raspberry pi nrog I2c adapter Qhov no I2C adapter ua rau kev txuas mus rau lub ntsuas qhov ntsuas tau yooj yim thiab ntseeg tau ntau dua.

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. CPS120

2. Raspberry Pi

3. I2C Cable

4. I2C Shield Rau Raspberry Pi

5. Ethernet Cable

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 ntsuas cua thiab raspberry pi. 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:

CPS120 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 Rau Kev Ntsuas Siab:

Qhov zoo ntawm kev siv raspberry pi yog, uas muab rau koj hloov pauv ntawm cov lus programming uas koj xav tau los teeb tsa lub rooj tsav xwm txhawm rau txhawm rau cuam tshuam lub sensor nrog nws. Kev siv cov txiaj ntsig zoo ntawm pawg no, peb tab tom qhia ntawm no nws tau ua haujlwm hauv Java. Tus lej java rau CPS120 tuaj yeem rub tawm los ntawm peb cov zej zog GitHub uas yog Dcube Store.

Ntxiv rau qhov yooj yim ntawm cov neeg siv, peb tab tom piav qhia cov cai ntawm no ib yam nkaus: Raws li thawj kauj ruam ntawm kev coding, koj yuav tsum rub tawm lub tsev qiv ntawv pi4j thaum java vim tias lub tsev qiv ntawv no txhawb nqa cov haujlwm siv hauv txoj cai. Yog li, txhawm rau rub lub tsev qiv ntawv koj tuaj yeem mus ntsib qhov txuas hauv qab no:

pi4j.com/install.html

Koj tuaj yeem luam qhov ua haujlwm java code rau lub ntsuas no los ntawm no kuj:

ntshuam com.pi4j.io.i2c. I2CBus;

ntshuam com.pi4j.io.i2c. I2CDevice;

ntshuam com.pi4j.io.i2c. I2CFactory;

ntshuam java.io. IOException;

pej xeem chav kawm CPS120

{

pej xeem zoo li qub tsis muaj dab tsi tseem ceeb (Txoj hlua args ) cuam tshuam zam

{

// Tsim I2CBus

I2CBus tsheb npav = I2CFactory.getInstance (I2CBus. BUS_1);

// Tau txais I2C ntaus ntawv, CPS120 I2C chaw nyob yog 0x28 (40)

I2CDevice ntaus ntawv = bus.getDevice (0x28);

// Xa cov lus txib pib

device.write (0x28, (byte) 0x80);

Xov.sleep (800);

// Nyeem 2 bytes ntawm cov ntaub ntawv, msb ua ntej

byte cov ntaub ntawv = tshiab byte [2];

device.read (cov ntaub ntawv, 0, 2);

// Hloov cov ntaub ntawv rau kPa

ob npaug siab = (((cov ntaub ntawv [0] & 0x3F) * 256 + cov ntaub ntawv [1]) * (90 / 16384.00)) + 30;

// Cov ntaub ntawv tso tawm rau lub vijtsam

System.out.printf ("Siab yog: %.2f kPa %n", siab);

}

}

Lub tsev qiv ntawv uas txhawb nqa i2c kev sib txuas lus ntawm lub sensor thiab pawg thawj coj yog pi4j, nws ntau pob khoom I2CBus, I2CDevice thiab I2CFactory pab tsim kom muaj kev sib txuas.

ntshuam com.pi4j.io.i2c. I2CBus; ntshuam com.pi4j.io.i2c. I2CDevice; ntshuam com.pi4j.io.i2c. I2CFactory; ntshuam java.io. IOException;

sau () thiab nyeem () lub luag haujlwm tau siv los sau qee cov lus txib tshwj xeeb rau lub ntsuas cua kom nws ua haujlwm hauv ib qho tshwj xeeb thiab nyeem cov ntawv tso tawm feem.

Qhov tso tawm ntawm lub sensor kuj tseem muaj nyob hauv daim duab saum toj no.

Kauj Ruam 4: Cov ntawv thov:

CPS120 muaj ntau yam kev siv. Nws tuaj yeem ua haujlwm nyob rau hauv nqa tau thiab ntsuas barometers, qhov siab thiab lwm yam Kev ntsuas siab yog qhov ntsuas tseem ceeb los txiav txim siab huab cua thiab txiav txim siab tias lub ntsuas no tuaj yeem teeb tsa ntawm cov chaw huab cua ib yam. Nws tuaj yeem suav nrog hauv cov tshuab huab cua nrog rau lub tshuab nqus tsev.