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]> 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/). > > 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 >>>> --- >>>> 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 >>>> [email protected]. >>>> To view this discussion on the web visit >>>> <https://groups.google.com/d/msgid/beagleboard/3b9db8f5-b454-4801-b4a5-49a867c0e255%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> https://groups.google.com/d/ >>>> msgid/beagleboard/3b9db8f5-b454-4801-b4a5-49a867c0e255% >>>> 40googlegroups.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 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/30ad5a80-4c6b-453b-b74b-c63f010996c4%40googlegroups.com?utm_medium=email&utm_source=footer> >> https://groups.google.com/d/msgid/beagleboard/30ad5a80-4c6b-453b-b74b-c63f010996c4%40googlegroups.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/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. >> > > -- 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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