mirror of https://github.com/ArduPilot/ardupilot
71 lines
1.3 KiB
Plaintext
71 lines
1.3 KiB
Plaintext
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/*******************************************
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Sample sketch that configures an HMC5883L 3 axis
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magnetometer to continuous mode and reads back
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the three axis of data.
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Code compiles to a size of 1500 bytes
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Equivalent Wire Library code compiles to 2032 bytes
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*******************************************/
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#include <I2C.h>
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#define HMC5883L 0x1E
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int x = 0;
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int y = 0;
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int z = 0;
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void setup()
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{
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I2c.begin();
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I2c.write(HMC5883L,0x02,0x00); //configure device for continuous mode
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}
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void loop()
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{
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I2c.read(HMC5883L,0x03,6); //read 6 bytes (x,y,z) from the device
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x = I2c.receive() << 8;
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x |= I2c.receive();
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y = I2c.receive() << 8;
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y |= I2c.receive();
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z = I2c.receive() << 8;
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z |= I2c.receive();
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}
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/* Wire library equivalent would be this
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//#include <Wire.h>
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#define HMC5883L 0x1E
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int x = 0;
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int y = 0;
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int z = 0;
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void setup()
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{
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Wire.begin();
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Wire.beginTransmission(HMC5883L);
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Wire.send(0x02);
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Wire.send(0x00);
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Wire.endTransmission();
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}
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void loop()
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{
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Wire.beginTransmission(HMC5883L);
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Wire.send(0x03);
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Wire.endTransmission();
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Wire.requestFrom(HMC5883L,6);
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x = Wire.receive() << 8;
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x |= Wire.receive();
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y = Wire.receive() << 8;
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y |= Wire.receive();
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z = Wire.receive() << 8;
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z |= Wire.receive();
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}
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********************************************/
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