if he connected it to the cnc with no 3.3v adapter it also could have fried the bbb.
On 5/20/2016 7:08 AM, Wally Bkg wrote: > > You do realize that on your PC the RS232 signal levels from the COM > ports are +/- 12V while without extra hardware the Beaglebone levels > are 0-3.3V? You may have fried the RX input on the Beaglebone if > you've connected it directly to a +/- 12V RS232 TX output. > > Assuming you've got the logic levels right, If you used a "standard" > serial cable on your PC to the CNC machine it probably activated the > CTS or DTR automatically, you may need to run one more wire from the > Beaglebone, or tie it active on the CNC interface side. > > > On Friday, May 20, 2016 at 7:36:15 AM UTC-5, Shaurabh Kumar Singh wrote: > > The cnc is dte as far as I know. > And I am assuming since it worked without hardware handshaking on > my pc, it shouldn require the same for the bbb either. > That said, I have tried both the settings. With and without > hardware handshaking. > The only thing I can think of is for some reason perhaps, the > default serial port settings must be different on the bbb (with > debian) than my pc (where I previously successfully had > communicated-windows) > > On 20 May 2016 08:19, "Wally Bkg" <wb666...@gmail.com > <javascript:>> wrote: > > On Thursday, May 19, 2016 at 7:08:55 PM UTC-5, Shaurabh Kumar > Singh wrote: > > Okay. I shall look it up. > By the way, i did confirm the working of the UART > pins(UART1 RX to UART4 TX and vice versa). > I had two terminal tabs open and when i typed into one and > entered(UART1 settings) it showed up on the other terminal > with UART4 settings. I inferred that the Adafruit > libraries work just fine for the BBB (correct me if i am > mistaken) > > It is just that while interacting with a CNC machine(with > a HAAS OS) it is not communicating rather just showing up > what is being sent. > > > You may need CTS or DTR active for the other end to accept > data and respond. Are you sure the CNC machine doesn't need a > "hardware handshaking" protocol? > > If you have uart1 talking to uart4 on the Beaglebone, that > says the problem is the physical connection and/or the > protocol to the CNC machine. Is the CNC machine wired to be > DTE or DCE? > > At this point I think you need help from the CNC machine's > documentation, or from someone familiar with that particular > machine. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a > topic in the Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/Z1s_NwXYNrw/unsubscribe > > <https://groups.google.com/d/topic/beagleboard/Z1s_NwXYNrw/unsubscribe>. > To unsubscribe from this group and all its topics, send an > email to beagleboard...@googlegroups.com <javascript:>. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/beagleboard/3b9db8f5-b454-4801-b4a5-49a867c0e255%40googlegroups.com > > <https://groups.google.com/d/msgid/beagleboard/3b9db8f5-b454-4801-b4a5-49a867c0e255%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > -- > 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 > <mailto:beagleboard+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/30ad5a80-4c6b-453b-b74b-c63f010996c4%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/30ad5a80-4c6b-453b-b74b-c63f010996c4%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout. -- 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/0eb51074-b51a-f658-f69c-10a7ec8aa58b%40gmail.com. For more options, visit https://groups.google.com/d/optout.
