Well, that was one problem. After searching in this forum I discover that I could use /dev/ttyO1
So I use # dmesg |grep serial and # cat /proc/tty/driver/OMAP-SERIAL to confirm that. # cat /proc/tty/driver/OMAP-SERIAL serinfo:1.0 driver revision: 0: uart:OMAP UART0 mmio:0x44E09000 irq:88 tx:558 rx:0 RTS|CTS|DTR|DSR 1: uart:OMAP UART1 mmio:0x48022000 irq:89 tx:75 rx:37 brk:1 CTS|DSR|CD|RI # dmesg |grep serial [ 0.210444] omap_uart 44e09000.serial: did not get pins for uart0 error: -19 [ 0.210719] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88) is a OMAP UART0 [ 5.035048] gserial_setup: registered 1 ttyGS* device [ 1763.473407] 48022000.serial: ttyO1 at MMIO 0x48022000 (irq = 89) is a OMAP UART1 But now I have other doubts. Why there are only 2 serials ? How can we access other if they aren't mapped /dev/tty?? []'s On Tuesday, June 10, 2014 10:32:04 AM UTC-3, Mike Bell wrote: > > On 06/10/2014 08:10 AM, [email protected] <javascript:> wrote: > > I follow instructions here > > > > https://github.com/adafruit/adafruit-beaglebone-io-python > > > > and here > > > > > https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/uart > > > > > but can't make any communication goes through UART1 . > > Instead of using /dev/tty01 I use /dev/tty1 which were on my system. > > > > Is there something missing in that post? > > What more can I do ? > > > > I tried easiest installation on Angstrom. > > I use UART1 with loop back > > I use a osciloscope to check signals in pin P9-24 > > > > > > This is the python programa I use to test port > > ############################################ > > import Adafruit_BBIO.UART as UART > > import serial > > UART.setup("UART1") > > ser = serial.Serial(port = "/dev/tty1", baudrate=9600) > > ser.close() > > ser.open() > > if ser.isOpen(): > > print "Serial is open!" > > ser.write("Hello World!") > > ser.close() > > ############################################ > > > > /dev/tty1 is a console device *NOT* a serial device. > > Mike > -- 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.
