THanks Gene and Andy for your inputs.
After setting the GPIO pin in output mode, I am getting the output on CRO.
setp hm2_5i25.0.gpio.023.is_output TRUE
setp hm2_5i25.0.gpio.023.invert_output FALSE
net pwm-generate <= pwmgen.0.pwm
net pwm-generate => hm2_5i25.0.gpio.023.out
But, still the problem persists that the period is not as per software PWMGEN
(T-oN= 2ms , T-Off = 6.7 ms) , Although in Halscope I am getting the correct
pulse output.
I am using the software PWM for generating pulses like this:
loadrt pwmgen output_type=0
setp pwmgen.0.value 0.299
setp pwmgen.0.pwm-freq 150
setp pwmgen.0.enable TRUEaddf pwmgen.make-pulses base-thread
addf pwmgen.update base-thread
Then I think, maybe the write_gpio function in base-thread is not getting
called correctly.I just registered that function in base thread like this:
addf hm2_5i25.0.write_gpio base-thread
Should I change something else ?
Best Regards,Adit
From: Gene Heskett <[email protected]>
To: [email protected]
Sent: Wednesday, April 27, 2016 6:54 PM
Subject: Re: [Emc-users] Need to add a faster thread base-thread with 100
microseconds, Compilation changes required !!!
On Wednesday 27 April 2016 12:12:22 adit bhargava wrote:
> Hello Andy,
>
> I checked the pins 4 and 17 on the 5i25 header, but there is no
> output.We do have a full set of wires connected to parallel port
> cable.I don't know how to proceed now.
>
> BRÁdit
In case you missed the read of the docs, those GPIO's so created are
inputs. So to use as outputs, you need to add some hal file lines that
turn them into outputs.
An example from my mills .hal file might be helpfull:
============================================
#*************************************************
# First - setup 5i25's p3-p17 for servo enable use
#*************************************************
setp hm2_5i25.0.gpio.007.is_output true
setp hm2_5i25.0.gpio.007.invert_output false
net spindle-enable <= motion.spindle-on => boot.spindle.enable
net spindle-enable => hm2_5i25.0.gpio.007.out # pwmgen-enable on P3-17
============================================
This signal serves as the enabling input to one of the Pico Systems
PWM-Servo amplifiers that I am using as the spindle motor driver, a 1HP
rated PM DC motor, from a 125 volt DC source good for about 2KW in ICAS.
1500 watts CCS. This enable signal is used because the PWMGEN facility
in the 5i25 does not supply that enabling signal to the outputs, it only
supply's the PWM and DIR.
The boot.spindle.enable is a module that goes with the PWM-Servo and it
issues both fwd and reverse pulses to the PWM-Servo to properly
pre-charge the output hexfets gate driving working voltages. They are so
short the motor never moves but they do the job. You do not see its
additional hal "wiring" in the above snippet as it contributes nothing
to this lesson.
The same I assume must be done in order to use P3-pin 4, you'll need to
get the GPIO numbers from the dmesg after running LCNC as their is
little to zero relationship between the p2|3 pin number and the 3 digit
GPIO numbers you see above. The above is mine, get yours for the
corresponding pin, like p3-17 FROM your dmesg output. They will be
consistent from run to run as long as the hal files loadrt line remains
the same, and you don't mesaflash a different configuration into the
5i25.
I hope this helps?
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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