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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: pwm pv |
| From: | Wang Xiaoqiang <[email protected]> |
| To: | Miguel Bordalo <[email protected]>, EPICS Tech Talk <[email protected]> |
| Date: | Wed, 21 Jun 2017 15:07:41 +0200 |
Hi, I have recently used PCASpy to drive GPIOs from raspberrypi. Now I added an example for PWM as well. https://github.com/paulscherrerinstitute/pcaspy/blob/master/example/rpi_gpio.py In case you want to give it a try, $ easy_install --user pcaspy And run the example $ python rpi_gpio.py Turn on the PWM output $ caput MTEST:PWM 1 Change the duty cycle 1-100 $ caput MTEST:DC 50 Change the frequency $ caput MTEST:FREQ 10 Best Xiaoqiang On 06/21/2017 11:53 AM, Miguel Bordalo wrote:
Hello,
I have an actuator that is only ON/OFF mode. I would like to turn it on
or off proportionally to a certain dutycycle. (i dont wont to turn it on
or off faster then a sec, and i would like that the 100% duty would
correspond to it turned on during a minute)
simplest way to do it?
I saw that there is a pv called pulseTrain, altought i belive i
dont have it installed in my RasperryPi epics installation.
Should i proceed with it (how?) or there is a easiest way to do this?
Thanks in advance
-------------------------------------------------------------------------
*Miguel Bordalo*
Licenciado em Engenharia Electrotécnica e de Computadores
Instituto Superior Técnico
[email protected] <mailto:[email protected]>