7i92 setup help

PCW
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10 years 11 hours ago #82291 by PCW

Replied by PCW on topic 7i92 setup help

I have two parallel ports coming from my MosChip 9815. Is there any firmware for the 7i92 that sets the pins/ports to match a generic parallel ports; is this even possible? I currently have the 7i92_MX4660x2D.bit firmware loaded.

Its possible for the 7I92 to emulate any parallel port configuration, but if you have MX4660 hardware,
you would want to use the a MX4660 config and the hardware step generators and PWM generator
which will already be assigned to the proper I/O pins.

This makes the hal file different from a parallel port hal file since different components are used and the way
the hardware components connect to the I/O pins is determined by the FPGA configuration, not in software

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andypugh
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9 years 11 months ago #82302 by andypugh

Replied by andypugh on topic 7i92 setup help

dingbatca wrote: I have two parallel ports coming from my MosChip 9815. Is there any firmware for the 7i92 that sets the pins/ports to match a generic parallel ports; is this even possible?

Assuming you have the software package for the 7i92
www.mesanet.com/software/parallel/7i92.zip

If you look in configs/hostmot2 you will find a bunch of .bit files. Your most likely one is
7i92_MX3660x2D

You can find how the pins are allocated in that bitfile by extracting configs/hostmot2/source/hostmot2 to find the PIN_MX3660x2D_34.vhd file, which determines the pinout of the firmware:

The relevant section looks like this:

Code:

-- 	Base func  sec unit sec func 	 sec pin					-- external DB25
		IOPortTag & x"00" & NullTag & NullPin,  				-- I/O 00	PIN 1		Output 2
		IOPortTag & x"00" & PWMTag & PWMAOutPin,				-- I/O 01	PIN 14   Spindle DAC PWM
		IOPortTag & x"00" & StepGenTag & StepGenStepPin,	-- I/O 02	PIN 2    X Step
		IOPortTag & x"00" & NullTag & NullPin,					-- I/O 03	PIN 15	Fault in
		IOPortTag & x"00" & StepGenTag & StepGenDirPin,		-- I/O 04	PIN 3		X Dir    
		IOPortTag & x"03" & StepGenTag & StepGenStepPin,	-- I/O 05	PIN 16   Charge pump stepgen
		IOPortTag & x"01" & StepGenTag & StepGenStepPin,	-- I/O 06	PIN 4		Y Step
		IOPortTag & x"00" & NullTag & NullPin,  				-- I/O 07	PIN 17	Output 1
		IOPortTag & x"01" & StepGenTag & StepGenDirPin,		-- I/O 08	PIN 5 	Y Dir
		IOPortTag & x"02" & StepGenTag & StepGenStepPin,	-- I/O 09	PIN 6		Z Step
		IOPortTag & x"02" & StepGenTag & StepGenDirPin,		-- I/O 10	PIN 7		Z Dir
		IOPortTag & x"00" & NullTag & NullPin,					-- I/O 11	PIN 8		Output 3
		IOPortTag & x"00" & NullTag & NullPin,					-- I/O 12	PIN 9		Output 4
		IOPortTag & x"00" & QCountTag & QCountQAPin,  		-- I/O 13	PIN 10	Input 1 / Quadrature A
		IOPortTag & x"00" & QCountTag & QCountQBPin,  		-- I/O 14	PIN 11	Input 2 / Quadrature B
		IOPortTag & x"00" & QCountTag & QCountIDXPin,  		-- I/O 15	PIN 12	Input 3 / Quadrature Index
		IOPortTag & x"00" & NullTag & NullPin,					-- I/O 16	PIN 13	Input 4

If you wire the BoB to look like that, then the 7i92 with that firmware should slot straight in. (with HAL changes, you need to redirect nets like "x-position axis.0.motor-pos-cmd stepgen.0.position-cmd" into "x-position axis.0.motor-pos-cmd hm2_7i92.0.stepgen.00.position-cmd"

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unlessou32
New Member

7 years 4 days ago #148963 by unlessou32

Replied by unlessou32 on topic 7i92 setup help

I have similar question about your topic, i just get 2 nema 23 stepper motor,
www.oyostepper.com/goods-65-Nema-23-Step...57x41mm-4-Wires.html
Today i have start my cnc project.

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