On Wednesday, December 20, 2017 at 4:38:19 PM UTC+11, Rob M wrote: > > > > The BBB PRU's are separate from the underlying OS. > > The cores of the RPi or any other multi core chip, (as for as I am aware) > can't be separated from the OS. > > I'd run a BBB any day of the week over a RPi. > > The way I have my BBB setup allows me to have 35 gpio's plus I2c and that > is with HDMI. I've made a custom cape and 2 connecting daughter boards that > I have setup with 12 Outputs & 5 inputs on one board and 13 inputs and 4 > outputs on the other. Similar to a PC with 2 Parallel ports. The extra gpio > is used to control the OE of each board. The boards also do the conversion > from 3.3v to 5v and 5v to 3.3v. > > The PRUs are great for step generation and reading a MPG type quadrature > encoder. > > If you want to run the BBB headless that will allow for a few extra > GPIO's. I think from memory my max velocity is 4800mm/minute which is kind > of scary fast one a BF20/G0704 Benchtop mill. > > I know the RPi is cheaper, has more memory and better graphics than the > BBB, but the fact that you can have hardware step-dir generation without > any extra hardware with the BBB is a winner. And personally I really don't > see an issue with the BBB graphics when running axis. > > Personally the BBB rocks and actually prefer it over a x86 platform for > running my mill. > > Anyway that just my opinion...and as they say opinions are > like............ everyone has one. > > Keeping asking questions, you'll get more answers and eventually work out > which option is best for your situation. >
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