Internships/ProjectIdeas/ArduinoVisualisation:detail

The QEMU emulated Arduino board visualizer is a platform for QEMU based board emulation interfacing.

Using the inteface a board is defined as a group of *widgets* connected to the Ardunio. Each widget is defined as a block that can have two features:

• User interaction: the user can modify the parameters of the widget.
• Visualization: the widget will show updates of the state of the circuit.

Widgets

	Led with brightness: the widget indicates the brightness of the led. If the led is connected to a GPIO pin the brightness could be full brightness or none depending on the GPIO state. If the led is connected to a PWM pin the brightness will be proportional to duty cicle of the signal.	Apple
	Potentiometer: the widget modifies the middle point of the potentiometer configuring a variable voltage to the ADC.
	Switch: the widget will be used to turn on/off all the board. The state of the switch is represented with a colored box with text: Open: Green. Closed: Red.
	Serial console: the widget will show the updated serial output.
	Button: the widget could be modify by the user. While the button is pressed the pin is connected to GND and HiZ when not.
	Oscilloscope: the widget could be connected to any pin showing the updated signal generated by QEMU.

Execution flow

When the visualizer is run with a board a netlist is selected. The netlist is parsed by the app looking for the widgets used and generating a QEMU execution line.

The QEMU execution line will generate all the interface devices needed and will let ready the core for code execution.