im working on the following project kalman filter
and im working to implement in arduino.. i read the entire code and i succesfully implemented it into arduino but i couldnt implement the following function code line because arduino gives "not defined" error in PI_DIV_180
fgx with PI_DIV_180 but as i said arduino cant identify it
i looked into math.h to find the value of that define but there isnt anything in math.h related with this
imu_MadgwickQuaternionUpdate function is in here IMU.cpp
can anyone help me please thanx..