Arduino library for the MPS MagAlpha magnetic angle sensor.
MagAlpha sensor detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder on the rotating shaft.
For more information on the MagAlpha sensor family:
Supports all 3rd generation MagAlpha magnetic angle sensors from Monolithic Power Systems.
|Turning knob applications (potentiometer replacement)||MA800, MA820, MA850|
|Rotary encoders (optical encoder replacement, Servo motors, ...)||MA702, MA704, MA710, MA730|
|Position controlled motor drivers (FOC, ...)||MA302, MA310|
|Motor commutation (hall switches replacement)||MA102|
Written by Mathieu Kaelin for Monolithic Power Systems. MIT license, all text above must be included in any redistribution.
|+3.3V (Not 5V)||VDD|
|Unlike most Arduino & Genuino boards, the MagAlpha runs at 3.3V. Even if the I/O can tolerate 5V, check that the voltage applied to VDD is at 3.3V. Applying a voltages higher than 3.3V to the VDD pin could damage the sensor.|
All MagAlpha have a SPI communication interface. Some sensors like the MA702 also have an additional SSI (2-wire) interface.
SPI (4-wire interface)
|any available digital pin (default: pin 0)||CS|
SSI (2-wire interface)
Arduino SPI pin mapping
|Arduino / Genuino Board||MOSI||MISO||SCK||CS||Voltage Level|
|Zero||ICSP-4||ICSP-1||ICSP-3||defined by the user, any digital pin (default: pin 0)||+3.3V|
|MKRZero||8||10||9||defined by the user, any digital pin (default: pin 0)||+3.3V|
|MKR1000||8||10||9||defined by the user, any digital pin (default: pin 0)||+3.3V|
|101||11 or ICSP-4||12 or ICSP-1||13 or ICSP-3||defined by the user, any digital pin (default: pin 0)||+3.3V|
|Due||ICSP-4||ICSP-1||ICSP-3||defined by the user, any digital pin (default: pin 0)||+3.3V|
|Uno or Duemilanove||11 or ICSP-4||12 or ICSP-1||13 or ICSP-3||defined by the user, any digital pin. Default pin must be changed because pin 0 is also used by the Serial port. (use pin 7 for example)||+5V|
|Mega1280 or Mega2560||51 or ICSP-4||50 or ICSP-1||52 or ICSP-3||defined by the user, any digital pin (default: pin 0)||+5V|
|Leonardo||ICSP-4||ICSP-1||ICSP-3||defined by the user, any digital pin (default: pin 0)||+5V|
Check Arduino SPI library reference page for more information on the SPI signal connections.
Install the library directly from within the Arduino IDE by using the Library Manager (Sketch => Include Library => Manage Libraries...).
It is also possible to import the library Zip file (check release tab) from the Arduino IDE (Sketch => Include Library => Add .ZIP Library...).
The library can also be manually installed by copying the MagAlpha library folder in your arduinosketchfolder/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE to see the library.
Check this tutorial on Arduino library installation for more information: