Real Time Clock on Raspberry Pi with FreeBSD 11

The Raspberry Pi doesn’t have any ‘Real Time Clock’ (RTC) module, which keeps actual time.

To use external RTC module DS1307 on the Raspberry Pi with FreeBSD 10 I wrote a small program.
But FreeBSD 11 has a new driver for DS1307.

Here is instruction how to use it with FreeBSD 11 on the Raspberry Pi.
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Liberation of the Serial Console in the FreeBSD on the Raspberry Pi

Raspberry Pi has UART interface on GPIO pins 14 and 15.
FreeBSD uses it as serial console.
It outputs system messages and provides terminal mode on it.
This is good for first time setup and for debugging.
But if you plan to use this interface for connection to any special device especially in a standalone project, you need to liberate this interface.

Here is a description how to do this.

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