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[VSCode] added vscode configuration guide authored by Luca Conterio's avatar Luca Conterio 
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GPIO-Usage-&-Used-Pins.md
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......@@ -4,7 +4,8 @@ GPIOs are grouped in ports and so each GPIO has an identifier.
The identifiers have the following format: PXY, where X is the port name and Y is the pin number.
### Configuration
Before using a GPIO it has to be configured.
> :warning: **WARNING: Before using a GPIO it has to be correctly configured. A lot of times you can experience non-working code or drivers due to not initialized or configured GPIOs.**
Examples of possible configurations for a GPIO are:
- **Output**: the pin voltage level can be set (logic level high or low)
- **Input**: the pin voltage level can be read (logic level high or low)
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