Thks for answearing! So uboot (the bootloader right?) might send bad commands to my device... well, can it really damage my device? I am just guessing ...
For using UART with the P8/P9 pins do I need to go through the hassle of doing the so called device-tree-overlay? Em quarta-feira, 5 de março de 2014 06h26min33s UTC-3, William Hermans escreveu: > > The serial debug port on the beaglebone black *is* a UART interface. That > is, RXD/TXD + GND only. > > You should be able to technically use this with your RFID device, > *however* it may also be possible that uboot by default may cause issues, > or perhaps damage to your external device at powerup / boot. It should also > be possible to configure uboot to play nice with your hardware. > > Probably the best / easiest way would be to use one of the other UARTs / > set of pins. > > > On Mon, Mar 3, 2014 at 5:55 PM, Ramon Mendes <midiw...@gmail.com<javascript:> > > wrote: > >> I want to connect this >> device<http://www.thingmagic.com/embedded-rfid-readers/mercury6e>(a RFID >> reader module) to my BBB, that is, I simply want them to talk (as >> if it was so easy, kkkk). >> This RFID module has the following electrical interfaces: >> >> UART with 3.3/5V logic levels >> from 9600 to 921,600 bps; USB >> 2.0 full speed device port (up to >> 12 Mbps) >> >> >> I already tried connecting it through USB but 'lsusb' and 'dmesg' shows >> nothing. So now I wanna try to connect it to my BBB trough UART (no USB is >> involved here). >> That is, my plan is simply use 3 wires (GND, RX, TX) to connect one >> device to another since I think both UART interfaces are compatible, right? >> Or am I missing to verify something to ensure they are compatible (both are >> TTL)? >> >> My question is, what is the simplest way to physically connect this >> device to BBB's UART? >> I want to know if would it be possible to use the serial debug header? >> That is, is this header a UART port? >> Or I must configure and use some of the P8/P9 pins? >> >> -- >> 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...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- 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. For more options, visit https://groups.google.com/groups/opt_out.
