CHARGE_PUMP(9)

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.- (requires a floating-point thread)
    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