Quote:
Originally Posted by Ether
Yeah, I gave some passing thought to that but didn't spend the time to-rework it to get the same result with modulo.
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OK, I came back and took a closer look at this. The mod function is not the way to do it. The floor function gives the desired result:
Code:
angle_error = joystick_command - gyro_angle;
angle_error -= 360*floor(0.5+angle_error/360);
setpoint = gyro_angle + angle_error;
If your compiler supports the
REMAINDER function "x
REM y" per IEC 60559 (mine does not so I have not tested this) as specified on Page 235 Section 7.12.10.2 of ISO/IEC 9899:TC3, then I believe the following should work:
Code:
angle_error = remainder(angle_error,360);
The above can be done in LabVIEW as shown in either of the two attached screenshots.
Engineers can really make a difference when people are in their time of need. - Elgin Clock [more] 
02-12-2011, 11:58 PM
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