From: Jerônimo Lopes <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Thursday, July 3, 2014 at 5:31 AM To: "[email protected]" <[email protected]> Subject: Re: [beagleboard] UART RS485 transciever setup
> Cristian, > > > 2014-07-03 8:55 GMT-03:00 Cristian Mitu <[email protected]>: >> Thank you for your response John. >> So i only need to to translate when sending data to the BBB or for both TX >> and RX ? >> > > I'm using BBB with a 75176 transceiver (5V powered). Put a diode between BBB > Rx and 75176: > > 75176------|<|------BBB Rx > > And a pullup resistor, from BBB Rx to 3.3V. > > It's working fine. Only for slow data speeds. > >> >> >> >> >> 2014-07-03 5:18 GMT+02:00 John Syn <[email protected]>: >>> >>> From: Cristian Mitu <[email protected]> >>> Reply-To: "[email protected]" <[email protected]> >>> Date: Wednesday, July 2, 2014 at 1:49 PM >>> To: "[email protected]" <[email protected]> >>> Subject: [beagleboard] UART RS485 transciever setup >>> >>>> Hello guys, >>>> >>>> >>>> I am designing a board ( an adapter board for the BeagleBine black) that is >>>> un upgrade for a current system. Beacuse of this i specifically have to >>>> link a 5V TTL RS485 transceiver to one of the UARTs available. I am not >>>> sure what logic family the BeagleBone uses(though i'm guessing that it is >>>> CMOS) and because of this i want to know if this old transceiver can be >>>> wired directly to the BeagleBone or is it unavoidable that i have to use >>>> logic level translators for the signals. I apologize for the newbie >>>> question and i thank you in advance for your response. >>> You will need to translate the 5V TTL signals to 3.3V before connecting to >>> the BBB. >>> >>> Regards, >>> John >>>> >>>> >>>> PS >>>> >>>> If you could direct me to some good drivers for RS485 communication i would >>>> be overwhelmed with joy and eternally grateful :) >>>> >>>> -- >>>> 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]. >>>> >>>> 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/tsrW0hBClBc/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> >>> 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]. >> 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]. > 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]. For more options, visit https://groups.google.com/d/optout.
