programming.rst

Programming AVR and Arduino

Notes on flashing AVR chips, both bare chips and contained within an Arduino board.

Check Communication

Run avrdude without a -U argument to test communication.

Serial over USB

Direct USB connection for devices Arduino UNO or Nano, where the serial port is something like tty.usbmodem411 in Mac OS X and ttyACM0 under Ubuntu - but only if the chip has a boot loader installed:

$ avrdude -c arduino -P /dev/XXX -p m328p

Serial over FTDI Friend

The Arduino Pro Mini does not have a USB port, so requires at FTDI USB to serial adapter. Serial programming requires that a bootloader already be installed:

$ avrdude -c avrisp -b 57600 -P /dev/ttyUSB0 -p m328p

AVR ICSP

Bare AVR chip, or using ICSP header to burn new bootloader on Arduino boards.

USBasp Programmer

$ avrdude -c usbasp -p m328p

USBtinyISP

Does not seem to play well with USB3. Try another cable, or use an intermediate USB2 hub.

$ avrdude -c usbtiny -p m328p

Flash Firmware

Add -U flash:w:filename:a to any of the above commands, eg.:

$ avrdude -c usbtiny -p m328p -U flash:w:main.hex:a