> From: Peter C. Wallace [mailto:[email protected]]
> You can look up the pwmgen manual page, Probably for a 1 KHz PWM filter and
> running the pwmgen at the 1 KHz serco thread I would use the software pwmgens
> PDM mode (so 50% is 1 ms on 1 ms off) This also depends on being able to
> disable the stepgen so this will only work if the stepgen has a higher number
> than any needed stepgen.
> (because you can enable stepgens 0..N not arbitrary stepgens)
>
Well I've used up all the stepgens on the first parallel port and using the
hardware PWM from the 7i92H. I move to the second port for step/dir and then
configure software PWM I guess I get the best of both worlds.
I'll take a look into the software generation. I should then be able to
disable the 7i92H PWM and do it as you suggested. If that works then it's not
a big deal to shift it to the second port as long as I have a port card that
works in the PC for port #2.
(From a research perspective I'm still keeping this a dual boot machine for WIN
(MACH3) and LinuxCNC along with the ability to use the Pi4 with the 7i92H and
the BeagleBone MachineKit Xylotex.
# external I/O signals
# IO Connections for P2 MESA 7i92_C11Gx2D.pin (from file)
# Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir
# 1 0 IOPort None
machine-is-enabled (output)
# 14 1 IOPort PWM 0 PWM (Out)
spindle-vel-cmd-rps PWM (ouput)
# 2 2 IOPort StepGen 0 Step/Table1 (Out)
x axis step pulse (output)
# 15 3 IOPort None
max-x-y-min-z (input)
# 3 4 IOPort StepGen 0 Dir/Table2 (Out)
x axis dir signal (output)
# 16 5 IOPort None
spindle-ccw output (output)
# 4 6 IOPort StepGen 1 Step/Table1 (Out)
y axis step pulse (output)
# 17 7 IOPort StepGen 4 Step/Table1 (Out)
Charge Pump frequency (output)
# 5 8 IOPort StepGen 1 Dir/Table2 (Out)
y axis dir signal (output)
# 6 9 IOPort StepGen 2 Step/Table1 (Out)
z axis step pulse (output)
# 7 10 IOPort StepGen 2 Dir/Table2 (Out)
z axis dir signal (output)
# 8 11 IOPort StepGen 3 Step/Table1 (Out)
a axis step pulse (output)
# 9 12 IOPort StepGen 3 Dir/Table2 (Out)
a axis dir signal (output)
# 10 13 IOPort QCount 0 Quad-A (In)
estop-external-in (input)
# 11 14 IOPort QCount 0 Quad-B (In)
min home-x (input)
# 12 15 IOPort QCount 0 Quad-IDX (In)
min home-y (input)
# 13 16 IOPort None
max-home-z (input)
#IO Connections for P1
#Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir
#
# 1 17 IOPort None
# 14 18 IOPort PWM 1 PWM (Out)
# 2 19 IOPort StepGen 5 Step/Table1 (Out)
Spindle Step Pulse
# 15 20 IOPort None
# 3 21 IOPort StepGen 5 Dir/Table2 (Out)
Spindle dir signal
# 16 22 IOPort None
Spindle Enable/Brake (output)
# 4 23 IOPort StepGen 6 Step/Table1 (Out)
Coolant Pump (output)
# 17 24 IOPort StepGen 9 Step/Table1 (Out)
# 5 25 IOPort StepGen 6 Dir/Table2 (Out)
Coolant Mist (Ouptut)
# 6 26 IOPort StepGen 7 Step/Table1 (Out)
# 7 27 IOPort StepGen 7 Dir/Table2 (Out)
# 8 28 IOPort StepGen 8 Step/Table1 (Out)
# 9 29 IOPort StepGen 8 Dir/Table2 (Out)
# 10 30 IOPort QCount 1 Quad-A (In)
Spindle Encoder-A
# 11 31 IOPort QCount 1 Quad-B (In)
Spindle Encoder-B
# 12 32 IOPort QCount 1 Quad-IDX (In)
Spindle Encoder-Index
# 13 33 IOPort None
#*******************
# PWM gen signals/setup
#*******************
# PWM signal pin config
setp hm2_7i92.0.pwmgen.00.output-type 1
setp hm2_7i92.0.pwmgen.00.scale [SPINDLE_9]PWM_SCALE
setp hm2_7i92.0.pwmgen.pwm_frequency 1000
net spindle-enable => hm2_7i92.0.pwmgen.00.enable
# PWM dir pin config
setp hm2_7i92.0.gpio.005.is_output true
net spindle-ccw => hm2_7i92.0.gpio.005.out
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