AVR Tutorials

Example programs for ATMega16A AVR microcontroller generally written in assembly language

• 00_uart_simple Simple UART echo program. Implemented with existing USART module on microcontroller.
• 01_uart_int Echo UART implemented with existing USART module and driven by interrupts.
• 02_uart_buffer UART with buffer for holding request message. Implemented with USART module on microcontroller.
• 03_uart_game Guess number from 1 until 100, UART transmission.
• 04_soft_uart UART transmission protocol implemented in assembly language.
• 05_encoder_simple Assembly program for impulse encoder to find out rotation direction. Information displayed on 7 segment display.
• 06_i2c_simple Sample program that communicates via I2C protocol with EEPROM chip. Implemented without error handling and interrupts.
• 07_i2c_soft Soft implementation of I2C Master mode protocol.
• 08_lcd_hd_44780 Assembly program to show text on LCD (HD-44780) and continuously pull states of buttons matrix. In case button pressed it LCD shows the button number.
• 09_sd_card_spi Initialize SD Card via SPI protocol, show bytes of the card on LCD
• 10_c_arduino_uart Example to show how the arduino library can be adjusted to run on ATMega16a microcontroller. UART communication written on C.
• 11_c_arduino_spi Example to show how to use adjusted arduino library to implement SPI master -> slave communication with RFC module. Sends info about RFC tag to the UART over SPI.
• 12_spi_asm_avr SPI protocol implemented on assembly.

Installation

Build scripts configured for PinBoard II dev board and are using on-board FT2232D chip as programmator. You probably need to adjust root Makefile in case you have different pinouts.

To build programs you need to install gcc-avr and avrdude.

Build and flash

To flash desired program to microcontroller:

cd [project] && make && make flash

Clean

make clean

or in parent directory:

make clean-all