35
ATTR{hctosys}=="0"
ATTR{max_user_freq}=="64"
ATTR{name}=="rtc
‐
s35390a"
ATTR{wakealarm}==""
2.
Add
udev
rule
$ vi /etc/udev/rules.d/99-rtc1.rules
KERNEL=="rtc1",
SUBSYSTEM=="rtc",
DRIVER=="",
ATTR{name}=="
rtc
‐
s35390a
",
SYMLINK="rtc",
MODE="0666"
3.
Run
the
rule
$ udevadm test /sys/class/rtc/rtc1
...
creating
link
'/dev/rtc'
to
'/dev/rtc1'
atomically
replace
'/dev/rtc'
…
4.
Confirm
$ ls -al /dev/rtc*
lrwxrwxrwx
1
root
root
4
May
19
2017
/dev/rtc
‐
>
rtc1
crw
‐‐‐‐‐‐‐
1
root
root
254,
0
May
19
2017
/dev/rtc0
crw
‐‐‐‐‐‐‐
1
root
root
254,
1
Jan
1
02:10
/dev/rtc1
3.1.8.
MMC (eMMC/SD) Test
3.1.8.1.
Read/Write Operations
It’s
simple
to
verify
read/write
operations
for
MMC
devices.
You
can
use
many
tools
to
do
this,
e.g.
dd,
vi,
cp,
etc.
eMMC:
/dev/mmcblk0
SD:
/dev/mmcblk1
3.1.8.2.
Write Protect
We
support
write
protect
feature
for
SD
card.
Once
a
SD
card
with
write
proctection
is
inserted,
you
can
see
“RO”
message
in
kernel
log.
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...
