I anyway could not find any previous work on serially connecting to a machine with BBB. I might have to shift to intel NUC. Do you think using FTDI USB to serial adapter is worth taking the risk? Is there anything different you suggest i could do perhaps?
On Fri, May 20, 2016 at 11:19 AM, evilwulfie <[email protected]> wrote: > the output from the bbb is 3.3v not 5v. if you use anything other than > some kind of level translator you risk harming your BBB > > it talks about that in the BBB srm. > > > > On 5/20/2016 8:17 AM, Shaurabh Kumar Singh wrote: > > Do you guys think i should also try a FTDI USB to Serial Adapter for BBB? > It might eliminate the voltage issue altogether. > > On Fri, May 20, 2016 at 11:14 AM, Shaurabh Kumar Singh < > <[email protected]>[email protected]> wrote: > >> CTS and DTR were not activated at the PC interface, i had looked up the >> serial port settings on which it was working. Anyway i did try with and >> without both and individually as wel. >> >> On Fri, May 20, 2016 at 11:11 AM, Shaurabh Kumar Singh < >> <[email protected]>[email protected]> wrote: >> >>> The RX and TX at the beaglebone are working just fine. The TX output >>> from the RS-232 is 5V. Also i tried with and without connecting the red >>> wire(5V) from the RS 232. The necessary connections are GND (black wire) , >>> RX and TX(green and white wires) of the PL2303 USB to Serial adapter. >>> I also tried using a BeagleBone Black RS-232 Serial Micro-cape (see >>> <http://www.logicsupply.com/cbb-ttl-232/> >>> http://www.logicsupply.com/cbb-ttl-232/). >>> >>> Note: RX and TX are working just fine for all the UART ports.(i confirm >>> after every try) >>> >>> On Fri, May 20, 2016 at 10:32 AM, evilwulfie <[email protected]> >>> wrote: >>> >>>> 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" <[email protected]> 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> >>>>>> 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/> >>>>>> https://groups.google.com/d/ >>>>>> topic/beagleboard/Z1s_NwXYNrw/unsubscribe. >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> [email protected]. >>>>>> To view this discussion on the web visit >>>>>> <https://groups.google.com/d/>https://groups.google.com/d/ >>>>>> msgid/beagleboard/3b9db8f5-b454-4801-b4a5-49a867c0e255% >>>>>> 40googlegroups.com. >>>>>> For more options, visit <https://groups.google.com/d/optout> >>>>>> https://groups.google.com/d/optout. >>>>>> >>>>> -- >>>> For more options, visit <http://beagleboard.org/discuss> >>>> 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 <[email protected]> >>>> [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/30ad5a80-4c6b-453b-b74b-c63f010996c4%40googlegroups.com >>>> . >>>> For more options, visit <https://groups.google.com/d/optout> >>>> https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>>> For more options, visit <http://beagleboard.org/discuss> >>>> 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. >>>> To unsubscribe from this group and all its topics, send an email to >>>> <[email protected]> >>>> [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/0eb51074-b51a-f658-f69c-10a7ec8aa58b%40gmail.com >>>> <https://groups.google.com/d/msgid/beagleboard/0eb51074-b51a-f658-f69c-10a7ec8aa58b%40gmail.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 [email protected]. > To view this discussion on the web visit > <https://groups.google.com/d/msgid/beagleboard/CAEh-rEEM3gnROWQSsFiVEEqtk5x%2BFVXTFtq%2BhUEh7n4nU_eT-g%40mail.gmail.com?utm_medium=email&utm_source=footer> > https://groups.google.com/d/msgid/beagleboard/CAEh-rEEM3gnROWQSsFiVEEqtk5x%2BFVXTFtq%2BhUEh7n4nU_eT-g%40mail.gmail.com > . > 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 a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/Z1s_NwXYNrw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/b7b4b38a-4871-8a3a-9975-e00adf5a227b%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/b7b4b38a-4871-8a3a-9975-e00adf5a227b%40gmail.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. 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