Learn AVR programming with ATMEGA162 and ATMEGA328p

Equipment / Software

1. EEPROM Programmer (TL866 II)
2. minipro
3. ATMEGA328p MCU (any atmega chip is also fine), datasheet
4. avr-gcc for compiling C, avra for compiling assembly

How to compile / flash

Checkout src/Makefile.

• compiles .c file to .hex file
• using minipro (TL866 II) to upload your code to chip
  • make flash to flash your code to chip
• make size to check compiled file size
• make disasm to check generated assembly code

Content (WIP)

• GPIO: AVR microcontroller has PORTA, PORTB, PORTC IO register. (./src/gpio/gpio.c)
• timer: AVR microcontroller usually have 1 ~ 3 timers (./src/timer/timer.c)
• external interrupt: you can trigger external interrupt in AVR microcontroller (./src/ext_int/ext_int.c)
• pin change interrupt: you can trigger pin change interrupt (PCINT) in AVR microcontroller
• usart: Rx, Tx communication (./src/usart/usart.c)
• watchdog: be able to detect if program has hang up or not
• DHT11: Using pure AVR chip to measure temperature via DHT11 (./src/dht11/dht11.c)
• flash: AVR microcontroller allows you declare const variable into flash space to save RAM (./src/flash/flash.c)
• SPI: (wip)
• I2C: (wip)
• EEPROM: (wip)

TODOs

• extract USART functionality

Resources

• RJH Coding AVR Toturial
• 程式人雜誌 - ATMEGA328p
• AVR YouTube playlist
• Make: AVR Programming (book)
  • Example code