NAME

       charge_pump - Create a square-wave for the 'charge pump' input of some controller boards

SYNOPSIS

       loadrt charge_pump

DESCRIPTION

       The 'Charge Pump' should be added to the base thread function.  When enabled the output is
       on for one period and off for one  period.  To  calculate  the  frequency  of  the  output
       1/(period  time  in  seconds x 2) = Hz. For example if you have a base period of 100,000ns
       that is 0.0001 seconds and the formula would be 1/(0.0001 x 2) = 5,000 Hz or  5  kHz.  Two
       additional  outputs  are  provided  that  run a factor of 2 and 4 slower for hardware that
       requires a lower frequency.

FUNCTIONS

       charge-pump
              Toggle the output bit (if enabled)

PINS

       charge-pump.out bit out
              Square wave if 'enable' is TRUE or unconnected, low if 'enable' is FALSE

       charge-pump.out-2 bit out
              Square wave at half the frequency of 'out'

       charge-pump.out-4 bit out
              Square wave at a quarter of the frequency of 'out'

       charge-pump.enable bit in (default: TRUE)
              If FALSE, forces all 'out' pins to be low

AUTHOR

       Jeff Epler

LICENSE

       GPL