**Measuring Tilt using a Three Axis Solution**

In order to define the angles of the accelerometer in three dimensions the pitch, roll and theta are sensed using all three outputs of the accelerometer. Pitch (ρ) is defined as the angle of the X-axis relative to ground. Roll (ϕ) is defined as the angle of the Y-axis relative to the ground. Theta (θ) is the angle of the Z axis relative to gravity.

http://www.freescale.com/files/senso...ote/AN3461.pdf

Here is the meat of the code:

solveangle: '**********Solve for x angle ******************************************** if xresult < yresult + zresult then dummy = 5000 'when x is smaller the following equation works best xlong = (dummy * xresult) /(sqr((yresult*yresult) + (zresult*zresult))) else 'keeps results accurate at near 0 and near 90 degree values dummy =30 'when x is larger the following equation works best xlong = (dummy * xresult*xresult) / ((yresult*yresult)+(zresult*zresult)) endif y = xlong x = dummy 'Assign x and y values for atan2 function call atan2 xangle = 9000 - y if yresult < xresult + zresult then dummy = 5000 'when y is smaller the following eqauation works best ylong = (dummy * yresult) / (sqr((xresult*xresult) + (zresult*zresult))) else dummy =30 'when y is larger the following equation works best ylong = (dummy * yresult*yresult) / ((xresult*xresult)+(zresult*zresult)) endif y = ylong x = dummy ' call atan2 yangle = 9000 - y

## Re: Help with PWM6 and PWM7 on 16F18857 ???

using the code configurator [mcc] for a 16f18875

richard Today, 01:19yields the following settings , not unsimilar to yours. it works perfectly.

maybe your pps is locked , your code is incomplete so I can't tell.