7i96 Can't get PWM output - SOLVED

PCW
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20 Nov 2019 16:07 #150771 by PCW

Replied by PCW on topic 7i96 Can't get PWM output

It looks like the configuration tool sets up the PWM frequency and mode (it sets the mode incorrectly) but its does not make the connections between Linuxcnc and the hardware

something like

net spindle_on spindle.0.on hm2_7i96.0.pwmgen.00.enable hm2_7i96.0.ssr.00.out-05
net spindle_speed spindle.0.speed-out hm2_7i96.0.pwmgen.00.value

( assuming you want sign magnitude PWM and a separate spindle ENA output on the 7I96's isolated output 5)

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jools
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20 Nov 2019 16:52 - 20 Nov 2019 16:53 #150772 by jools

Replied by jools on topic 7i96 Can't get PWM output

PCW wrote:
It looks like the configuration tool sets up the PWM frequency and mode (it sets the mode incorrectly) but its does not make the connections between Linuxcnc and the hardware

something like

net spindle_on spindle.0.on hm2_7i96.0.pwmgen.00.enable hm2_7i96.0.ssr.00.out-05
net spindle_speed spindle.0.speed-out hm2_7i96.0.pwmgen.00.value

( assuming you want sign magnitude PWM and a separate spindle ENA output on the 7I96's isolated output 5)

Yeah when I looked at it I thought that it was the net functions/commands missing.

The functions I would like are spindle command fromwithin a program and MDI along with the manual controls of stop, cw, cww and the speed increase and decrease.

I also think the configuration tool sets up the outputs wrong too. When I used the tool and set cw, ccw and enable outputs up from the tab linux cnc failed to load citing io.hal issues. The lines in the io.hal are the second bit of code in the OP. All of them caused a failure to load.

Thanks for this I'll implement it later and update.

Jools

Last edit: 20 Nov 2019 16:53 by jools. Reason: clarification

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jools
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20 Nov 2019 19:49 #150787 by jools

Replied by jools on topic 7i96 Can't get PWM output

PCW wrote:
Sorry the command is

halcmd show all *pwmgen*

or

halcmd show all | grep pwm

I forgot that halcmd does not do a simple text match like vanilla grep
but seems to search only for complete tokens

code output for this below

Loaded HAL Components:
ID      Type  Name                                            PID   State

Component Pins:
Owner   Type  Dir         Value  Name
    29  bit   IN          FALSE  hm2_7i96.0.pwmgen.00.enable
    29  float IN              0  hm2_7i96.0.pwmgen.00.value

Pin Aliases:
 Alias                                            Original Name

Signals:
Type          Value  Name     (linked to)

Parameters:
Owner   Type  Dir         Value  Name
    29  bit   RW          FALSE  hm2_7i96.0.pwmgen.00.out0.invert_output
    29  bit   RW          FALSE  hm2_7i96.0.pwmgen.00.out0.is_opendrain
    29  bit   RW          FALSE  hm2_7i96.0.pwmgen.00.out1.invert_output
    29  bit   RW          FALSE  hm2_7i96.0.pwmgen.00.out1.is_opendrain
    29  s32   RW              1  hm2_7i96.0.pwmgen.00.output-type
    29  float RW           2500  hm2_7i96.0.pwmgen.00.scale
    29  u32   RW     0x00004E20  hm2_7i96.0.pwmgen.pdm_frequency
    29  u32   RW     0x00000014  hm2_7i96.0.pwmgen.pwm_frequency

Parameter Aliases:
 Alias                                            Original Name
 hm2_7i96.0.pwmgen.00.out0.invert_output          hm2_7i96.0.gpio.025.invert_output
 hm2_7i96.0.pwmgen.00.out0.is_opendrain           hm2_7i96.0.gpio.025.is_opendrain
 hm2_7i96.0.pwmgen.00.out1.invert_output          hm2_7i96.0.gpio.026.invert_output
 hm2_7i96.0.pwmgen.00.out1.is_opendrain           hm2_7i96.0.gpio.026.is_opendrain

Exported Functions:
Owner   CodeAddr  Arg       FP   Users  Name

Realtime Threads:
     Period  FP     Name               (     Time, Max-Time )

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jools
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20 Nov 2019 20:00 - 20 Nov 2019 20:01 #150790 by jools

Replied by jools on topic 7i96 Can't get PWM output

tommylight wrote:
Add the num_pwm = 1 to loadrt line for Mesa 7i76, or see if there is a provision for setting that in tool.

I did wonder about this because the configuration tool doesn't add a PWMGENS = (value) in the .INI file. All the other loadrt's are referenced through the HOSTMOT part of the ini file. See code

[HOSTMOT2]
DRIVER = hm2_eth
IPADDRESS = "10.10.10.10"
BOARD = 7i96
STEPGENS = 3
ENCODERS = 1
SSERIAL_PORT = 1

I'm possibly thinking there's a bug with the tool (though I am probably wrong with this), I will start a new thread asking if anyone has got this working. Someone must have got the pwmgen firmware working and maybe I can copy their file.

I had tried this earlier though and it didn't work.

Last edit: 20 Nov 2019 20:01 by jools.

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PCW
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20 Nov 2019 21:07 #150797 by PCW

Replied by PCW on topic 7i96 Can't get PWM output

Did you try my net suggestions?

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jools
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20 Nov 2019 21:48 #150801 by jools

Replied by jools on topic 7i96 Can't get PWM output

I did but they didn’t work initially. Need to just look at it in more depth in the morning and try them in different places; it’s getting late here.

Thanks for the help so far, I’ll update in my morning.

Jools

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jools
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21 Nov 2019 09:30 #150814 by jools

Replied by jools on topic 7i96 Can't get PWM output

Bigjohnt has updated on another thread that he has not been able to configure PWM on the 7I96.

I will look at velocity mode to control it.

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PCW
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21 Nov 2019 14:16 #150826 by PCW

Replied by PCW on topic 7i96 Can't get PWM output

I just tested my net commands and:

I get spindle speed proportional PWM on the STEP4 output
I get a spindle direction signal on the DIR4 output
I get a spindle on control from the SSR5 output

Adding the two net commands and fixing the PWM mode set
error was all that was needed to get this working

The following user(s) said Thank You: jools

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jools
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21 Nov 2019 15:47 #150838 by jools

Replied by jools on topic 7i96 Can't get PWM output

PCW wrote:
It looks like the configuration tool sets up the PWM frequency and mode (it sets the mode incorrectly) but its does not make the connections between Linuxcnc and the hardware

something like

net spindle_on spindle.0.on hm2_7i96.0.pwmgen.00.enable hm2_7i96.0.ssr.00.out-05
net spindle_speed spindle.0.speed-out hm2_7i96.0.pwmgen.00.value

( assuming you want sign magnitude PWM and a separate spindle ENA output on the 7I96's isolated output 5)

Should they be underscores or hyphens?

Did you put them in the hal file or the h#io.hal.

Any chance you can attach your whole configs file please.

Thanks

Jools

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PCW
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21 Nov 2019 15:52 #150839 by PCW

Replied by PCW on topic 7i96 Can't get PWM output

The signal names can be listed via halcmd so there is no need to guess
in fact you can list all signal, pins, and parameters and create a file for
copy pasting with

halcmd show all > allnames.txt

I put the commands in the main hal file

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