Posted on July 22, 2016 at 16:58Hello,
To understand how
Equation 2 (page 7) has been obtained see:
LSM303DLH pitch/roll/heading calculation (Appendix A, page 19). There is
Equation 12 (page 22), where first equation:
Mx2 = Mx1 cos �?� + Mz1 sin �?�
is equivalent to:
XH = XM cos Pitch + ZM sin Pitch
of
Equation 2 (page 7) and second equation:
My2 = Mx1 sin γ sin �?� + My1 cos γ - Mz1 sin γ cos �?�
is equivalent to:
YH = XM sin Roll sin Pitch + YM cos Roll - ZM sin Roll cos Pitch
of
Equation 2 (page 7).
To understand more please see also more recent documents on this topic:
http://www.st.com/resource/en/design_tip/dm00269987.pdf
