MYiR MYC-C8MMQ6-8E2D-160-I, Руководство по разработке на Linux

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4.3 RTC
This sample demostrates how to write and read the RTC time ,as well as when the system power off for a while , the system time
whether synchronize to the RTC.
Hardware connection
Install RTC battery into J20.
Software test
RTC write and read test :
1.View the system time
# date
Wed Apr 3 12:09:40 UTC 2019
2.Update the system time to RTC
hwclock -w
3.View the time of RTC
# hwclock
Wed Apr 3 12:11:09 2019 0.000000 seconds
4.Set a system time
#date -s 20170402
Sun Apr 2 00:00:00 UTC 201
5.Update the RTC`s time to system
#hwclock -s
#date
Wed Apr 3 12:13:10 UTC 2019
Perform RTC synchronization system time test
The above process has set the time for the RTC. Now power off first for a minute, then power on , the system time will be
update by RTC .
# date
Wed Apr 3 12:14:20 UTC 2019
4.3 RTC
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