This guide describes how to configure a file on the BBB to enable UART 1 and UART 4.
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*Note* The BBB UARTS are not enabled by default.
Steps:
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1. Connect to the BBB.
2. If not already present, create a bin directory in the Debian home directory.
mkdir bin
3. Change into the bin directory.
cd ./bin
4. Start nano to create a new file.
nano
5. Copy the following code and paste into nano:
#!/bin/sh
# Set up the serial port UART1.
echo "==== Setting up serial port UART1 ===="
config-pin p9.24 uart
config-pin p9.26 uart
stty -F /dev/ttyO1 sane
stty -F /dev/ttyO1
# Set up the serial port UART4.
echo "==== Setting up serial port UART4 ===="
config-pin p9.11 uart
config-pin p9.13 uart
stty -F /dev/ttyO4 sane
stty speed 115200 -F /dev/ttyO4
stty -F /dev/ttyO4
6. Press ‘ctrl+x’ to exit the file.
7. Enter ‘Y’ when prompted to save the file.
8. When prompted, enter the name of the file to be ‘pinconfig.sh’ and press ‘Enter’.
*Note* The pinconfig.sh file can now be used to enable the UARTS.