How to install RISC-V support in the Arduino IDE

In this short guide I will explain how to use the Arduino IDE version 1.8+ with SiFive RISC-V based boards.

Start the Arduino software and open the file menu, preferences.
Click the button right of the Additional Board Manager URLs field.
Add the following address to a new line in the (empty) list:

https://raw.githubusercontent.com/westerndigitalcorporation/CincoWinPkg/master/package_sifive_index.json

Save and close the list

Go to the menu tools –> board –> board management
Select as type: contributed

Now you should have the possibility to install support for RISC-V boards

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