Therefore, detecting the MCU type is as simple as reading these three constants and compare their values with the known ones for the chip type(s). This is not unique for every single chip, but it is unique for every MCU type. The AVR programming environment, provides three constants, SIGNATURE_0, SIGNATURE_1, and SIGNATURE_2 representing the three bytes of the signature code. While currently it is not possible to programmatically read the Arduino type (e.g., is it an Arduino UNO or a MEGA2560 ?), we can still detect the used MCU type.Įvery ATmega MCU (and not only) has a signature code. Adafruit Industries, Unique & fun DIY electronics and kits Arduino bootloader-programmed chip (Atmega328P) : ID 123 - This is a preprogrammed Atmega328P. We have selected an FTDI board that uses an Atmel ATmega8u2 with Arduino firmware loaded. From tools menu set programmer as Arduino as ISP. If not sure of argument for external tool, do what he does in first video, use Arduino IDE to find out. In the argument field, tell avrdude to use the Uno as the programmer (arduino or avrisp). In some cases it is important to programmatically detect the micro-controller type, e.g., is it an ATmega328p or an ATmega2560 ? For example, when dealing with USART communication, we need to know the MCU type, because different MCUs have different number of USART ports and some of them even requires different settings for USART communication. ZZ8727 ATMEGA328P MCU IC with Arduino Uno Bootloader. Program Arduino Uno with Arduinoisp sketch (arduinoexamples).
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