logic - LinuxCNC HAL component providing configurable logic functions
loadrt logic
[count=N|names=name1[,name2...]]
personality=0xXXXX[,0xXXXX...]
count The number of logical gates.
names The named logical gates to create.
personality Comma separated list of hexadecimal
number.
Each number defines the behaviour of the individual logic gate. The list must have the same number of personalities as the N count.
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:
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The number of input pins, usually from 2 to 16 | ||
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256 (0x100) if the ‘and’ output is desired | ||
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512 (0x200) if the ‘or’ output is desired | ||
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1024 (0x400) if the ‘xor’ (exclusive or) output is desired | ||
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• |
2048 (0x800) if the ‘nand’ output is desired | ||
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• |
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.
logic.N
Read the inputs and toggle the output bit.
logic.N.in-MM
bit in (MM=00..personality & 0xff)
logic.N.and bit out [if personality &
0x100]
logic.N.or bit out [if personality &
0x200]
logic.N.xor bit out [if personality &
0x400]
logic.N.nand bit out [if personality &
0x800]
logic.N.nor bit out [if personality &
0x1000]
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
and2(9), lut5(9), not(9), or2(9), xor2(9)
Jeff Epler
GPL