Using GPS module with Debian Wheezy

To read the NMEA messages from the GPS Module of VIBE :

• Enable UART4 (/dev/ttyO4) in device tree kernel.

#cd /lib/firmware
#echo BB-UART4 > /sys/devices/bone_capemgr.9/slots

• You can read the slots or use dmesg to see that UART4 has been enabled.

#cat /sys/devices/bone_capemgr.9/slots

• Output will be like this :

0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART4

• Install Minicom or use the following commands to see NMEA messages

#apt-get install minicom 
#minicom –s (port settings /dev/ttyO4 19200 8N1)

OR

#stty –F /dev/ttyO4 19200 raw
#cat /dev/ttyO4