hehe
On 10/27/19 12:39 PM, Tim March wrote:
Re: [Emc-users] Raspberry Pi
The RPI gipo driver that TProwle explained in wicky works with RPI 4.
is Powderly that difficult?
Powderly Waverly Haverly Everly, all good old Welsh names.
And the credits goto Micheal Haberlerand KL Chin for the hal-gpio driver.
Michael wrote it for Machinekit
and KL unravelled 2 lines thus allowing it to work with Linuxcnc.
And now include Andy Pugh's work on it.
It needs to be updated for new revision # of RPI 4.
I have RPI 4 w/4gig of ram I added revision # for my board. The revision
# can be different depending on where it was manufactured.
Yes theres some code that look for revisions and
isnt very future friendly.
Also I just thought.. I am not sure RPi4 uses BCM2835.
But if it works, thats a good start.
I have had a hat made that you connect a 40 pin ribbon cable to gpio’s
and hat. Then use a Grbl CNC Shield v3 with Polou drivers for a 4 Axis
solution.
Cool, let us know about the hat.
Also look into the SPI I/O expansion using MCP23S17 chips.
I used 2 pcs on an RPi form factor pcb from ETT, and it worked well.
I didnt use it inside Linuxcnc but it gave me oodles of cheap user i/o.
( and its stackable )
hth
TomP
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