a. avr-gcc calls avr-gcc compiler.. b. -Os in simple words, Optimize the output file for Size.. c. DF_CPU= defines the MCU system clock which is indeed the 16MHz for the Arduino-Uno. d.

Spread the loveThe ATmega328P is a microcontroller chip that is at the heart of the popular Arduino Uno board. This chip is responsible for controlling the input and output functions of the board, ...

I’ve been using the Arduino Uno board for quite some time, and I’ve always wondered what it would take to get the ATmega328P (the original chip used on the older Uno boards) working completely on its ...

The Arduino Uno-compatible board has an MCS-51 (often called 8051 instead) instead of the usual ATmega328P/ATmega168. Specifically, [ElectroBoy] uses the AT89S52 .

In ARDUINO we have 20 I/O pins, so we can program 20 pins of UNO to be used as either input or output. Although there are more pins on ATMEGA328P controller than on UNO, this is because while ...