At Sat, 20 Jul 2019 20:58:50 -0700 (PDT) [email protected] wrote:
> > > > Hi robert, > > i checked the enabled uarts in the BBB using the following command : > > ls -l /dev/ttyO*, it showed all the uart like bellow > > > > /dev/ttyO0 -> ttyS0 > > /dev/ttyO1 -> ttyS1 > /dev/ttyO2 -> ttyS2 > /dev/ttyO3 -> ttyS3 > /dev/ttyO4 -> ttyS4 > /dev/ttyO5 -> ttyS5 > > i connected Uart1 tx to Uart2 rx and Uart1 rx to Uart2tx on board to check > the basic functionality using 2 minicom on two terminals > > after that i opened the two terminals > > for 1 terminal i used minicom -D /dev/ttyO1 -b 9600 > for other terminal i used minicom -D /dev/ttyO2 -b 9600 > > two minicoms are opened but not able to communicate both... > > please tell me anyhing i am missing?? You need to enable the pins with uBoot overlays: BB-UART1-00A0 => maps UART1 to P9.24 (Tx) and P9.26 (Rx) BB-UART2-00A0 => maps UART2 to P9.21 (Tx) and P9.22 (Rx) You need to edit /boot/uEnv.txt: Change these two lines: #uboot_overlay_addr6=/lib/firmware/<file6>.dtbo #uboot_overlay_addr7=/lib/firmware/<file7>.dtbo to uboot_overlay_addr6=/lib/firmware/BB-UART1-00A0.dtbo uboot_overlay_addr7=/lib/firmware/BB-UART2-00A0.dtbo and then reboot. -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services [email protected] -- Webhosting Services -- 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/20190721131927.14F3426C0172%40sharky3.deepsoft.com.
