I really don't need ns. The valve 'on time' is going to be in the range of 500 ms to 2 seconds probably.
I will review the PRUCookbook! Thanks! Walter On Wednesday, February 17, 2021 at 10:10:53 AM UTC-5 Mark A. Yoder wrote: > The PRUs can give you 10's of ns timing, which is more than good enough > for milliseconds, but might be over kill. > > I'd think using C on the ARM processor should be fast enough. I'd use > gpiod[1]. > > If you really want the ns timing of the PRUs, check out the PRU Cookbook[2] > > --Mark > > [1] https://github.com/starnight/libgpiod-example > [2] https://github.com/MarkAYoder/PRUCookbook > > On Tuesday, February 16, 2021 at 10:51:11 AM UTC-5 pierric...@gadz.org > wrote: > >> Depending on how precise you need to be, I would go for the PRU-ICSS. >> They can control the GPIOs pretty easily. >> >> Le mardi 16 février 2021 à 10:03:47 UTC-5, wal...@edenconceptsllc.com a >> écrit : >> >>> I have a BBB Wireless running Linux beaglebone 4.14.108-ti-r106 #1 SMP >>> PREEMPT Fri May 24 22:12:34 UTC 2019 armv7l GNU/Linux >>> >>> I am writing in C. >>> >>> I turn a valve on and then need to read some sensors for N milliseconds >>> and then turn the valve off. >>> >>> What's the best way to read milliseconds on the BBBw? I don't have a >>> RTC on this particular unit but could add one using I2C. I have an >>> Adafruit 4282 with a DS3231 RTC on it on another BBBw that I could use >>> temporarily to prove it works. What other options are available? >>> >>> >>> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/fc16c0ce-4895-4bfd-93a4-245fe6b0d59cn%40googlegroups.com.
