31
$ arecord -D plughw:0,2 -r 16000 -f S16_LE ./f-16000.wav
3.1.4.
GPIO Test
3.1.4.1.
Export GPIO
$ cd /sys/class/gpio
# GPIO 1~8 (DB9)
$ echo 8 > export
$ echo 9 > export
$ echo 12 > export
$ echo 13 > export
$ echo 24 > export
$ echo 25 > export
$ echo 26 > export
$ echo 27 > export
# GPIO 9~16 (GPIO_INT)
$ echo 28 > export
$ echo 33 > export
$ echo 34 > export
$ echo 35 > export
$ echo 36 > export
$ echo 69 > export
$ echo 73 > export
$ echo 108 > export
3.1.4.2.
Loopback Test
1.
Connect
two
GPIO
pins
respectively.
For
example,
we
connect
GPIO
1
&
2
together.
2.
Set
directions
$ echo out > gpio1/direction
$ echo in > gpio2/direction
3.
Get
values
(default
should
be
0)
$ cat gpio2/value
4.
Set
values
&
verify
Summary of Contents for RSB-4760
Page 1: ...User Manual RSB 4760 3 5 SBC with Qualcomm APQ 8016 Processor ARM Cortex A53 Architecture...
Page 26: ...25 Figure 2 25 M 2 Connector 2 3 Mechanical 2 3 1 Jumper and Connector Location...
Page 27: ...26 2 3 2 Board Dimensions 2 3 2 1 Board Drawing Figure 2 22 Board Dimension Layout Top Side...
Page 28: ...27 Figure 2 23 Board Dimension Layout Bottom Side Figure 2 24 Board Dimension Layout Coastline...
