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Buttons

There are 4 physical buttons and 4 touchscreen buttons. In this section we are only talking about the physical buttons. The other 4 buttons will be discussed inside the Touchscreen section section of the documentation.

All physical buttons are configured to work with interrupts in falling edge mode. As such, they are all connected to a GPIO pin and to the board's GND.

The 4 physical buttons are:

  • System Start
  • Voltage Mode Toggle
  • Cursor Left
  • Cursor Right

System Start

Connection: PE4 (Pin 2)

This button is used to start and stop the ADC.

Voltage Mode Toggle

Connection: PD3 (Pin 18)

As explained in the previous section, this button toggles the Voltmeter mode from High Voltage to Low Voltage and vice-versa

Cursor Left

Connection: PD0 (Pin 21)

When the Waveform Viewer is active and the cursor is turned on, this button moves the cursor to the previous recorded point.

Cursor Left

Connection: PD1 (Pin 20)

When the Waveform Viewer is active and the cursor is turned on, this button moves the cursor to the next recorded point.