3 of 3
update broken link (see https://github.com/arduino/Arduino/tree/master/hardware)
The "firmware" is whatever program a microcontroller runs. On an Arduino, it is typically the program you write and upload into the microcontroller's flash memory.
If by "firmware" you mean the core library (the source code of
pinMode(), digitalRead() and so on), it is here:
https://github.com/arduino/ArduinoCore-avr
If by "firmware" you mean the bootloader (the small program that runs at reset and will accept the upload of your firmware), is is here:
https://github.com/arduino/ArduinoCore-avr/tree/master/bootloaders/optiboot
Note that this is valid for the AVR-based Arduinos. The cores and bootloaders used in other architectures are stored is separate repositories, e.g.
Edgar Bonet
- 45.1k
- 4
- 42
- 81