Test; Rtc Test; Switch To External Rtc - Advantech RSB-4760 User Manual

3.5" sbc with qualcomm apq-8016 processor arm cortex a53 architecture

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3.1.6.2. Test

1. Insert USB disk

2. Run:

# Generate random file

$ dd if=/dev/urandom of=data bs=1 count=1024

# Backup

$ dd if=/dev/sda of=backup bs=1 count=1024 skip=4096

# Write data

$ dd if=data of=/dev/sda bs=1 seek=4096

3. Read & verify

$ dd if=/dev/sda of=data1 bs=1 count=1024 skip=4096

$ diff data data1

4. Restore

$ dd if=backup of=/dev/sda bs=1 seek=4096

Set system time and write to RTC.

The date format is MMDDhhmm[[CC]YY][.ss]

$ date 021710452016 && hwclock -w & date

Set incorrect time and read time from RTC to verify

$ date 010100002000 && hwclock -r & date

Restore the RTC time to system time

$ hwclock -s && date

1. Check RTC1 info

$ udevadm info -a -p /sys/class/rtc/rtc1

looking at device

'/devices/platform/soc/78ba000.i2c/i2c‐0/0‐0030/rtc/rtc1':

KERNEL=="rtc1"

SUBSYSTEM=="rtc"

DRIVER==""

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