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LOGIC(9) HAL Component LOGIC(9)

NAME

logic - LinuxCNC HAL component providing configurable logic functions

SYNOPSIS

loadrt logic [count=N|names=name1[,name2...]] personality=0xXXXX[,0xXXXX...]

Each number defines the behaviour of the individual logic gate. The list must have the same number of personalities as the N count.

DESCRIPTION

General `logic function' component. Can perform `and', `or', `nand', `nor' and `xor' of up to 16 inputs.

Determine the proper value for `personality' by adding the inputs and outputs then convert to hex:

  • The number of input pins, usually from 2 to 16
  • 256 (0x100) if the `and' output is desired
  • 512 (0x200) if the `or' output is desired
  • 1024 (0x400) if the `xor' (exclusive or) output is desired
  • 2048 (0x800) if the `nand' output is desired
  • 4096 (0x1000) if the `nor' output is desired

Outputs can be combined, for example 2 + 256 + 1024 = 1282 converted to hex would be 0x502 and would have two inputs and have both `xor' and `and' outputs.

FUNCTIONS

Read the inputs and toggle the output bit.

PINS






EXAMPLES

This is an OR circuit connected to three different signals, two inputs named sig-in-0 and sig-in-1, and one output named sig-out. First the circuit is defined, then its function is connected to the servo real time thread, last, its pins are connected to the wanted signals.

loadrt logic count=1 personality=0x202
addf logic.0 servo-thread
net sig-in-0 => logic.0.in-00
net sig-in-1 => logic.0.in-01
net sig-out  <= logic.0.or

This is a named AND circuit with two inputs and one output.

loadrt logic names=both personality=0x102
addf both servo-thread
net sig-in-0 => both.in-00
net sig-in-1 => both.in-01
net sig-out  <= both.and

SEE ALSO

and2(9), lut5(9), not(9), or2(9), xor2(9)

AUTHOR

Jeff Epler

LICENSE

GPL

2024-07-13 LinuxCNC Documentation