Raspberry Pi 4 with Mesa 7c81

The 7c81_c11gx2d.bit is correct for a C11g
(at least it matches CNC4PCs manual)

In the C11G manual, DB25 pin 14 = PWM
and DB25 pins 2 and 3 are step/dir outputs
and the relay pins are 1 and 17. This matches
the firmware pinout.

I don't think that firmware works for me, this would be the configuration of the 7c81:


Pin# I/O
P1-01/DB25-01 0 PWM SPINDLE
P1-02/DB25-14 1 CHARGE PUMP
P1-03/DB25-02 2 CW SPINDLE
P1-04/DB25-15 3 ESTOP
P1-05/DB25-03 4 CCW SPINDLE
P1-06/DB25-16 5 ENABLE X
P1-07/DB25-04 6 STEP X
P1-08/DB25-17 7 ENABLE C10
P1-09/DB25-05 8 DIR X
P1-11/DB25-06 9 STEP Y
P1-13/DB25-07 10 DIR Y
P1-15/DB25-08 11 STEP Z
P1-17/DB25-09 12 DIR Z
P1-19/DB25-10 13 LIMT X
P1-21/DB25-11 14 LIMT Y
P1-23/DB25-12 15 LIMT Z
P1-25/DB25-13 16 PROBE
IO Connections for P2+Serial -> 7C81_1
Pin# I/O
P2-01/DB25-01 17 OIL PUMP
P2-02/DB25-14 18 PUMP MIST
P2-03/DB25-02 19 ENCODER A
P2-04/DB25-15 20 OUT
P2-05/DB25-03 21 ENCODER B
P2-06/DB25-16 22 STEP A
P2-07/DB25-04 23 JOG X
P2-08/DB25-17 24 DIR A
P2-09/DB25-05 25 JOG Y
P2-11/DB25-06 26 JOG Z
P2-13/DB25-07 27 JOG A
P2-15/DB25-08 28 1
P2-17/DB25-09 29 0.1
P2-19/DB25-10 30 0.01
P2-21/DB25-11 31 ESTOP MPG
P2-23/DB25-12 32 IN
P2-25/DB25-13 33 IN

Do you have some documentation for your breakout?

That does not match a CNC4PC C11G

drive.google.com/file/d/1TW8bCW-9kMDqs1z...5g/view?usp=drivesdk

Seems to need a login to view

I send the file to you email.