USBasp - USB programmer for Atmel AVR controllers

USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega48 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.

Features

Works under multiple platforms. Linux, Mac OS X and Windows are tested.
No special controllers or smd components are needed.
Programming speed is up to 5kBytes/sec.
SCK option to support targets with low clock speed (< 1,5MHz).
Planned: serial interface to target (e.g. for debugging).

Download

Firmware and circuit

The following packages include circuit and firmware.
usbasp.2009-02-28.tar.gz (260 kB)
usbasp.2007-10-23.tar.gz (172 kB)
usbasp.2007-07-23.tar.gz (176 kB)
usbasp.2006-12-29.tar.gz (118 kB) Supports programmers with ATMega48 and ATMega8.
usbasp.2006-09-16.tar.gz (116 kB) New VID/PID!
usbasp.2005-11-14.tar.gz (175 kB)
usbasp.2005-07-03.tar.gz (166 kB)
usbasp.2005-04-21.tar.gz (169 kB)

Please refer to Readme.txt for details on building, installing and using USBasp.

Drivers

On Linux and MacOS X no kernel driver is needed. Windows requires a driver for USBasp:
usbasp-windriver.2009-02-28.zip (70 kB)

Note: Windows Vista/7 x64 requires drivers with digital signature. Currently there are no official drivers for libusb (USBasp software is based on it) with such a signature. Users reported that there is a tool named "Driver Signature Enforcement Overrider" to avoid the signature check.

Software

AVRDUDE supports USBasp since version 5.2.
BASCOM-AVR supports USBasp since version 1.11.9.6.
Khazama AVR Programmer is a Windows XP/Vista GUI application for USBasp and avrdude.
eXtreme Burner - AVR is a Windows GUI Software for USBasp based USB AVR programmers.

Hardware

Schematic

PCB layouts

Here is a list of tested PCB layouts. If you have designed your own PCB, please let me know.

		Official USBasp kit by Fisch und Fischl GmbH Official USBasp kit with case and preprogrammed controller. No smd parts. Offiziellen USBasp Bausatz bestellen
		usbasp_single_side.t3001.zip by Thomas Fischl Single-Side PCB, TARGET 3001! layout file Size: 90x40 mm (optimized for case Hammond 1591ATBU)
		lv_usbasp.tar.gz by Pawel Szramowski (11/2007) With Low-voltage front-end. Single-Side PCB, EAGLE layout files, some SMD components
		http://bwalle.de/docs/usbasp/ by Bernhard Walle Double-Side PCB, EAGLE layout files, part list with order numbers for Reichelt.de and Conrad.de Size: optimized for case Hammond 1591ATBU
		http://thomaspfeifer.net/atmel_usb_programmer.htm by Thomas Pfeifer Single-Side PCB, PDF layout files, SMD components
		http://ostry.w.szu.pl/misc.php#USBasp by Tomasz Ostrowski Single-Side PCB, PDF and EPS layout files, only four 0805 SMD parts, rest discrete components
		USBasp_CH.zip by Christian Heigemeyr Single-Side PCB, with some SMD 0805 components, PDF-files With additional buttons for reset and disconnection of the target
		USBasp.sch, USBasp.pcb ComponentSide.pdf, TopSide.pdf, Schematics.pdf by Zhurov Pavel Single-Side PCB, P-CAD 2002 format and PDF files Crosspiece TXD and RXD are added for the ISP connector
		usbasp_gr.rar by J.A. de Groot The board is single sided (EAGLE format), measures 3 by 8 cm and uses only regular components. USBasp Howto (in Dutch). There is also a pdf file with 6 devices on one euro-card.
		usbasb_mg.zip by Matthias Görner Single-Side PCB, eagle-format, with PS/PDF-files integrated sockets for target chips ATmega8 and ATmega32
		Tarball with layout by Hannes Östlund Doubleside-Side PCB, SMD components, very small
		http://mcuusage.org.ua/ForAmateurs/Miscellaneous/USBasp_eng.aspx by Sergiy Bogdancev (01/2010) 3.3V version, ATMega48 only. Single-side PCB, ExpressPCB layout format + socket board for varies AVRs. Without future serial interface, chip initially must be programmed with another programmer.
		Eaglefiles (sch/brd) and CAD case design (dxf) by Hans Hafner, HTL Mössingerstrasse-Klagenfurt, Österreich, hans.hafner (at) htl-klu (dot) at (01/2010) CNC-milled case (DXF file available), Eagle layout, only a few SMD parts