DHCOR STM32MP1 Linux: Difference between revisions

Revision as of 07:52, 22 July 2020

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Unsing the internal RTC

At first the time needs to be set:

Display current time	# date
Change time	# date -s "2020-01-30 10:00:00"

Next save the current time to the internal RTC:

Save the current time to the hardware clock	# hwclock -w

RS-485 device

DHCOM UART 2	`/dev/ttySTM2`

Compilation on target

`gcc tty_rs485_test.c -o tty_rs485_test`

Set tty device to raw mode

`stty -F /dev/ttySTM2 115200 cs8 raw -echo`

Send data with demo program

./tty_rs485_test /dev/ttySTM2

Receive data with demo program

`./tty_rs485_test /dev/ttySTM2`

Download example source code

@@ Line 4: / Line 4: @@
 :'''Unsing the internal RTC'''
-The internal RTC of the STM32MP1 is reachable via the following commands:
+:At first the time needs to be set:
-:{| class="wikitable" style="width: 400px"
+:{| class="wikitable" style="width: 500px"
-  ||Read||# hwclock -w
+  ||Display current time||''# date''</tt>
+ |-
+ ||Change time ||''# date -s "2020-01-30 10:00:00"''</tt>
   |}
+:Next save the current time to the internal RTC:
+:{| class="wikitable" style="width: 500px"
+ ||Save the current time to the hardware clock||''# hwclock -w''
+ |}