On Tue, 2010-01-12 at 15:59 -0800, Peter C. Wallace wrote: > On Tue, 12 Jan 2010, Flying Electron wrote: > > > Date: Tue, 12 Jan 2010 15:47:34 -0800 > > From: Flying Electron <[email protected]> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <[email protected]> > > To: "Enhanced Machine Controller (EMC)" <[email protected]> > > Subject: Re: [Emc-users] PWM input to EMC2 > > > > I've got a pressure sensor that I'd like to use as a probe. The sensor > > has a value from 0 - 1023 based on the amount of pressure applied. The > > sensor is read by a microcontroller and the microcontroller can generate > > a pwm signal based on the sensor value. I was thinking that EMC2 could > > read in the PWM signal and reconvert the PWM signal back to a number > > from 0 - 1023 which could then be fed into a comparator in HAL to > > generate the probe signal. I think doing it this way would allow me to > > vary the trip point by varying the comparator input. > > > > The only two ways I have figured out how to get an analog value into > > EMC2 through a parallel port is either PWM input or pulsing an input pin > > at a frequency and having an encoder trigger off the pulses and read the > > velocity from the encoder. Maybe I am making this too complicated and > > there is a simpler way? > > > > Thanks!
What about rs232? Maybe you can use a userspace hal component to read the number via serial port. Moses ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
