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The HMC6352 is a digital compass with an I2C interface.
00001 #include "HMC6352.h" 00002 00003 HMC6352 compass(p9, p10); 00004 Serial pc(USBTX, USBRX); 00005 00006 int main() { 00007 00008 pc.printf("Starting HMC6352 test...\n"); 00009 00010 //Continuous mode, periodic set/reset, 20Hz measurement rate. 00011 compass.setOpMode(HMC6352_CONTINUOUS, 1, 20); 00012 00013 while (1) { 00014 00015 wait(0.1); 00016 00017 pc.printf("Heading is: %f\n", compass.sample() / 10.0); 00018 00019 } 00020 00021 }
| HMC6352 Signal Name | mbed pin |
|---|---|
| Vcc | Vout |
| Gnd | Gnd |
| SCL | p27 |
| SDA | p28 |
Public Member Functions |
|
| HMC6352 (PinName sda, PinName scl) | |
|
Constructor.
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| int | sample (void) |
|
Sample the device and return the result.
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| void | setSleepMode (int enterOrExit) |
|
Enter into or exit from sleep mode.
|
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| void | setReset (void) |
|
Update bridge offsets.
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| void | setCalibrationMode (int enterOrExit) |
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Enter into or exit from calibration mode.
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| void | saveOpMode (void) |
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Save the current operation mode byte to EEPROM.
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| int | getSlaveAddress (void) |
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Read the memory location on the device which contains the slave address.
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|
| int | getOffset (int axis) |
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Read the current offset for X or Y axis magnetometer.
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| void | setOffset (int axis, int offset) |
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Set the offset for X or Y axis magnetometer.
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| int | getTimeDelay (void) |
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Get the current time delay.
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| void | setTimeDelay (int delay) |
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Set the time delay of the device.
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| int | getSumNumber (void) |
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Get the number of measurements being summed each sample.
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| void | setSumNumber (int sum) |
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Set the number of measurements being summed each sample.
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| int | getSoftwareVersion (void) |
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Get the software version on the device.
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| int | getOpMode (void) |
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Get the current operation mode.
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| void | setOpMode (int mode, int periodicSetReset, int measurementRate=0) |
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Set the operation mode.
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| int | getOutputMode (void) |
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Get the current output mode of the device.
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| void | setOutputMode (int mode) |
|
Set the output mode of the device.
|
|
Honeywell HMC6352 digital compass library.
Library published 27 Nov 2010 by 
Aaron Berk
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The Sparkfun breakout board for this module has the two I2C pullups on it already - so no need to add external ones.
http://www.sparkfun.com/datasheets/Sensors/Magneto/HMC6352-v16.pdf