DHCOR STM32MP1 Linux

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Linux Userspace Commands

Unsing the internal RTC

Read out the current date and time of the system (not the RTC itself)

# 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

The pinmuxing of the DHCOR STM32MP1 can be configured just as needed by you as a customer and therefore the interfaces used in each configuration might be different. However, to give you an easy way to start developing with the DHCOR STM32MP1 you can use the Avenger96 Board, which is the reference design for our DHCOR module. Thus, the interfaces described here, are the configuration for the Avenger96.

Serial (UART) Interfaces

96Boards Name	Linux Name	Hardware Name
UART 0	/dev/ttySTM0	UART 7
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

microSD and eMMC

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

GPIOs

96Boards Name	Linux Name	Hardware Name
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14
A	tt>gpiochip0 14	PA14