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]> 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]> > 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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