DHCOR STM32MP1 Linux

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Linux Userspace Commands

Unsing the internal RTC

Read out the current date

# date

Set a specific system time

# date -s "2020-01-30 10:00:00"

Save the current system time to the RTC of the STM32MP1

# hwclock -w

When you allready have stored a date on the RTC and you want to read it out, use the next command. This command only gives back the time, but does not synchronize it with the system time. This is done in the next step.

# hwclock -r

The system time can be synchronised to the RTC by this command:

# ??????????????????

Kernel Userspace Interfaces to Access Hardware

Serial (UART) Interfaces

DHCOM (FF) UART 1	/dev/ttymxc0
DHCOM (BT) UART 2	/dev/ttymxc4
DHCOM (STD) UART 3	/dev/ttymxc3

Serial (UART) Interfaces

96Boards Name	Linux Name	Hardware Name
UART 0	/dev/ttySTM0	UART7
UART 1	/dev/ttySTM1	UART 4

I²C Interfaces

96Boards Name	Linux Name	Hardware Name
I2C0	/dev/i2c-1	I2C2
I2C1	/dev/i2c-0	I2C1
OnBoard	/dev/i2c-2	I2C4