Document new buttons and LEDs

[bessman]

Problem Description

The new prototype has several new buttons and LEDs. Some are self-explanatory (RESET), while others could use some documentation explaining their purpose.

In particular:

• The BOOT button. Through trial-and-error I found out that keeping BOOT pressed while resetting the device makes it boot into bootloader mode.
• What does the POWER button do?
• What is the purpose of the four white LEDs mentioned in White LEDs next to battery connector too bright #135?

[mariobehling]

The BOOT button. Through trial-and-error I found out that keeping BOOT pressed while resetting the device makes it boot into bootloader mode.

Correct.

What does the POWER button do?

The user needs to press this button to activate the output of the power converter. It means if the user uses a battery they can use this button to switch on/off the device. Switch on: Press one time. To switch it off press two times within one second to shut down the device.

What is the purpose of the four white LEDs

With all 4 lid up it means the battery is fully charged.

To be tested: What happens when connected to USB?

[bessman]

To be tested: What happens when connected to USB?

When my prototype is connected to USB, three of the battery LEDs light up and the fourth blinks with a period of ~1 sec.