expansion_shiftreg

Plugin: expansion_shiftreg

Expansion to add I/O's via shiftregister's

"expansion": [
    {
        "type": "shiftreg",
        "speed": "1000000",
        "bits": "8",
        "pins": {
            "clock": "G2",
            "load": "G1",
            "in": "C4",
            "out": "H2"
        }
    }
],

you can use this extra IO's like this:

        {
            "type": "dout_bit",
            "name": "LED0",
            "invert": "true",
            "pin": "EXPANSION0_OUTPUT[0]"
        },
        {
            "type": "dout_bit",
            "name": "LED1",
            "invert": "true",
            "pin": "EXPANSION0_OUTPUT[0]"
        },

LinuxCNC-RIO with Unipolar Stepper's over Shiftreg to the FPGA

Output-Expansion with 74HC595:

EXP	74HC595	FUNC
out	14	DS
in
clock	11	SH_CP / SRCLK
load	12	ST_CP / RCLK

Input-Expansion with 74HC165:

EXP	74HC165	FUNC
out
in		SER
clock	2	CLK
load		SH/LD

expansion_shiftreg.v