Help on how to use the BBB UART

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1

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
  4. #second terminal window:
  5. 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)
#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

2

Howdy,

Here is the newbie again! I am learning how to use the BB UARTs. I am
working on the example at
UART | Setting up IO Python Library on BeagleBone Black | Adafruit Learning System

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,