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Laird WB45NBT
Reference Guide
sysfs
Linux can present data about the system and drivers by using
mounted at /sys and through various virtual files, you can read information about the kernel, drivers, and hardware
of the system. By writing to various files, you can cause the drivers or kernel to take various actions. See the
section below for examples. Detailed information can be found in the following document:
https://www.kernel.org/pub/linux/kernel/people/mochel/doc/papers/ols-2005/mochel.pdf
debugfs
Debugfs (debug file-system) is a useful virtual file system that presents debug information and allows you to affect
various system parameters. It is not mounted by default but can be mounted via the following command:
# mount -t debugfs none /sys/kernel/debug
It is typically found at /sys/kernel/debug.
Finding Version Information
The kernel version can be found via the uname command:
# uname -a
Linux summit 3.8.0-laird5 #30 PREEMPT Tue Aug 13 14:48:13 PDT 2013
armv5tejl GNU/Linux
The rootfs Laird release can be found in /etc/summit-release:
# cat /etc/summit-release
Laird Linux wb45n-laird_fips-3.4.0.6
H
U
N
ARDWARE
SE
OTES
GPIOs
The GPIOs on the breakout-board are connected through to the port C pins on the WB45 module. For example, for
LED3:
The other GPIO and LEDs are similar.
Name
Linux ID
LED
D18
GPIO0
72
GPIO1
78
D17
GPIO2
67
D16
GPIO3
75
D15
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wi-fi
sysfs
(system file-system). The entire tree can be found
Header Pin
Port
Comments
1
pc8
kernel-led driver - led0: heartbeat
pc14
kernel-led driver – led1: status
2
pc3
3
pc11
4
27
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