NAME

       gearchange - Select from one two speed ranges

SYNOPSIS

       The output will be a value scaled for the selected gear, and clamped to the min/max values
       for that gear.  The scale of gear 1 is assumed to be 1, so the output device scale  should
       be  chosen  accordingly.  The scale of gear 2 is relative to gear 1, so if gear 2 runs the
       spindle 2.5 times as fast as gear 1, scale2 should be set to 2.5.

FUNCTIONS

       gearchange.N (requires a floating-point thread)

PINS

       gearchange.N.sel bit in
              Gear selection input

       gearchange.N.speed-in float in
              Speed command input

       gearchange.N.speed-out float out
              Speed command to DAC/PWM

       gearchange.N.dir-in bit in
              Direction command input

       gearchange.N.dir-out bit out
              Direction output - possibly inverted for second gear

PARAMETERS

       gearchange.N.min1 float rw (default: 0)
              Minimum allowed speed in gear range 1

       gearchange.N.max1 float rw (default: 100000)
              Maximum allowed speed in gear range 1

       gearchange.N.min2 float rw (default: 0)
              Minimum allowed speed in gear range 2

       gearchange.N.max2 float rw (default: 100000)
              Maximum allowed speed in gear range 2

       gearchange.N.scale2 float rw (default: 1.0)
              Relative scale of gear 2 vs. gear 1.  Since it is assumed  that  gear  2  is  "high
              gear", scale2 must be greater than 1, and will be reset to 1 if set lower.

       gearchange.N.reverse bit rw (default: 0)
              Set to 1 to reverse the spindle in second gear.

AUTHOR

       Stephen Wille Padnos

LICENSE

       GPL