Help on how to use the BBB UART

[Lidia Toscano]

Howdy,

Here is the newbie again!  I am learning how to use the BB UARTs.  I am working on the example at https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/uart

The  minicom commands are not working for me.

1. #first terminal window:
2. minicom -b 9600 -D /dev/ttyO1
3.  
4. #second terminal window:
5. minicom -b 9600 -D /dev/ttyO2
6. 
   

I modified the program slighty thinking I could setup UART1 and UART2, cross the RX/TX of UART 1 and UART 2 as per the directions.

Since I can't get the minicom to work for me is there another way I test everything is working?

Here is my program in Python:

#!/usr/bin/python

import Adafruit_BBIO.UART as UART

import serial

UART.setup("UART1")

UART.setup("UART2")

#tty1 RX = P9_26   TX = P9_24

ser = serial.Serial(port = "/dev/tty1", baudrate=9600)

#tty2 RX = P9_22   TX = P9_21

ser = serial.Serial(port = "/dev/tty2", baudrate=9600)

ser.close()

ser.open()

if ser.isOpen():

        print "Serial is open!"

        print "Great Job"

ser.write("Hello World!")

ser.close()

# Eventually, you'll want to clean up, but leave this commented for now,

# as it doesn't work yet

#UART.cleanup()

I am expecting to be able to transmit and receive: "Hello Word!"  right?

Thanks in advance,

Lidia

[Robert Nelson]

On Mon, Sep 19, 2016 at 2:22 PM, Lidia Toscano <lidia....@gmail.com> wrote:
> Howdy,
>
> Here is the newbie again! I am learning how to use the BB UARTs. I am
> working on the example at
> https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/uart
>
> The minicom commands are not working for me.
>
> #first terminal window:
> minicom -b 9600 -D /dev/ttyO1
>
> #second terminal window:
> minicom -b 9600 -D /dev/ttyO2
>
> I modified the program slighty thinking I could setup UART1 and UART2, cross
> the RX/TX of UART 1 and UART 2 as per the directions.
>
> Since I can't get the minicom to work for me is there another way I test
> everything is working?
>
> Here is my program in Python:
>
> #!/usr/bin/python
> import Adafruit_BBIO.UART as UART
> import serial
>
> UART.setup("UART1")
> UART.setup("UART2")
>
> #tty1 RX = P9_26 TX = P9_24
> ser = serial.Serial(port = "/dev/tty1", baudrate=9600)

^ /dev/ttyO1

> #tty2 RX = P9_22 TX = P9_21
> ser = serial.Serial(port = "/dev/tty2", baudrate=9600)

^ /dev/ttyO2

Regards,

--
Robert Nelson
https://rcn-ee.com/