BBB Debug Serial Interface for normal serial work, eg Adafruit NFC breakout?

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1

I just tried to connect an Adafruit NFC-breakout board to the BeagleBone Black (2013-6-6 version of Angstrom).

I downloaded the latest libnfc and compiled it with the default options, which would include the SPI and UART versions of the PN532 driver that can work with this NFC board.

At first, it did not seem to work.I had connected the board tot the Serial Debug Connector, assuming that it would be just a serial header. (see page 81 and 82 of the SRM)

I did not get any response. Than I connected it to UART4, using

optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0DEV,BB-UART4

in /media/BEAGLEBONE/uEnv.txt tot bring ttyO4 to life.

Then , after setting
export LIBNFC_INTRUSIVE_SCAN=yes
I could read NFC tags via nfc-poll and nfc-list.

Is there a way to get the Serial Debug Connector working as a normal serial interface?
Or did I do something wrong?

Kind Regards,

Johan Henselmans

2

I just tried to connect an Adafruit NFC-breakout board to the BeagleBone
Black (2013-6-6 version of Angstrom).

I downloaded the latest libnfc and compiled it with the default options,
which would include the SPI and UART versions of the PN532 driver that can
work with this NFC board.

At first, it did not seem to work.I had connected the board tot the
Serial Debug Connector, assuming that it would be just a serial header.
(see page 81 and 82 of the SRM)

I did not get any response. Than I connected it to UART4, using

optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0DEV,BB-UART4

in /media/BEAGLEBONE/uEnv.txt tot bring ttyO4 to life.

Then , after setting
export LIBNFC_INTRUSIVE_SCAN=yes
I could read NFC tags via nfc-poll and nfc-list.

Is there a way to get the Serial Debug Connector working as a normal
serial interface?
Or did I do something wrong?

You just need to free it up. It is being used by a terminal server.

Try:
systemctl disable serial-getty@ttyO0.service
systemctl stop serial-getty@ttyO0.service
systemctl status serial-getty@ttyO0.service

3

Stupid me! Should have thought of that…