Man page - charge_pump(9)

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Package: linuxcnc-uspace
apt-get install linuxcnc-uspace

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Manual

CHARGE_PUMP

NAME
SYNOPSIS
DESCRIPTION
FUNCTIONS
PINS
AUTHOR
LICENSE

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