AVR ATmega328p 10 bit ADC Configuration and PC serial communication tutorial

• The tutorial teaches the user to configure the 10 bit SAR ADC of ATmega328P in Embedded C and transmit the ADC result to Linux /Windows PC using USART and a USB to Serial Converter.

• ADC6 and ADC7 channels are only available in the 32 pin TQFP version of ATmega328P chip.

• Tutorial deals in Single Channel conversionas well as configuring multiple channels of ATmega328P ADC

Code

• Sourcecode written in Embedded C.
• Compiled using AVR-GCC using Make utility.
• Code can be uploaded using AVRDUDE and any compatible programmer.

Hardware setup

• Code tested on ATmega328p (32 pin TQFP).
• ATmega328p Clocked with a 11.0592MHz external crystal.
• USB to Serial Converter used to connect ATmega328p with PC
• PuTTY used to receive and Transmit data
• 

ATmega328p Clocking (Fuse Bits)

• External 11.0592MHz Crystal
• avrdude -c usbasp -p m328p -U lfuse:w:0xFF:m

Online Documentation

• Configuring the ATmega328p 10 bit ADC and transmitting the results to a PC

• Configuring the ATmega328p Microcontroller to use external crystal

• ATmega328p USART serial communication tutorial

• USB to Serial/RS232/RS485 Converter

• www.xanthium.in