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Topic: HMC5843 compass output to rotating arrow on a graphics display (Read 1 time) previous topic - next topic

0miker0

I have purchased a Honeywell three axis HMC5843 compass a little while ago and have the  int ix,iy,iz; float fx,fy,fz; data displayed as text onto a graphics display. My goal would be to have this data displayed as an arrow pointing north.

After searching for code examples out there all I could find is an analog second hand rotating 360 degrees.

second.angle = (2 * pi / 60) * td.second;
second.end_x = second.hand_radius * cos (second.angle) + clock_center_x;
second.end_y = second.hand_radius * sin (second.angle) + clock_center_y;
LCDSetLine(clock_center_x, clock_center_y, second.end_x, second.end_y, WHITE);

If anyone can help it would be appreciated.

PaulS

The art of getting good answers lies in asking good questions.

krulkip

Hi,
Maybe you are looking for some processing code like this.
http://www.fact4ward.com/blog/ic-if/hmc5843/

Riva

How about a high resolution (small step) stepper motor with an arrow stuck on the shaft.
Don't PM me for help as I will ignore it.

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