A digital tilt converter for three-axis accelerometers
Chun-Liang Hsu, Wen-Cheng Chou, Wen‐Yen Lin · 2013
Three-axis accelerometers have been widely used not only in motion sensing but also in tilting sensing nowadays. The tilting angle conversions from 3D acceleration data involves with complicated mathematic calculations such as multiplication, division, square-root and trigonometric functions. Indeed, the conversion can be done by only using simple addition, subtraction, and shifting operations through our proposed 2DCORDIC based tilt sensing algorithm. In this work, a hardware framework of this algorithm is realized, validated by FPGA development board, and tested through I2C interface with a microcontroller and a 3-axis digital accelerometer.