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Embedded Engineering.
Saturday, April 30, 2011.
USBasp - USB programmer for Atmel AVR controllers.
About The Programmer USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega48 and ATMega88 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 ( NOTE:- I have posted a new porgammer with same hardware as this but capable to program 8051 and avr both with changing the firmware only. click here to see USB 8051 & avr programmer'
Simple Steps to made This programmer Step 1 :-
Download : Firmware and circuit The following packages include circuit and firmware. Firmware is the software which going to be burn into programmer's microcontroller, this firmware have code to enable the programmer to communicate with pc via usb and target microcontroller.
Click This link to dwonload the Firware and circuit usbasp.2011-05-28.tar.gz (519 kB ) UPDATED.
Please refer to Readme.txt for details on building, installing and using USBasp. Schematic USB AVR Mircrocontroller progammer Step 2 :-
Buy The parts You need.
3 Way dip switch 1.
Step 3 :-
PCB and Part Soldering:-
You can create your own pcb using any PCB editor like eagle, OR you can solder the circuit a general purpose pcb, You Can also Use PCB created By me Click here to dwonalod my pcb design A Genral Purpose PCB USB AVR Programmer PCB Created by Me For your use.
USB AVR Programmer pcb Step 4 :-
Getting The Atmega8 Microcontroller Ready To be used as a programmer:-
Note:- Make sure you burn the right fuse bit configration along with the firmware into atmega8 microcontroller for atemega8 the fuse bit are atmega8 HFUSE=0xC9 LFUSE=0xEF.
if you have a problem how to burn those fuse bit use the give serial avr programmer then please visit serial avr progammer page for detailed information.
Step 6 :-
Driver installation on a PC:-
At the first time when you connect your programmer to the pc your programmer will be dected as usbasp and you have to provide a proper path for drivers to be installed. USB AVR prorammer Dected By the widnows Give the Instruction for a specfic location driver installation Give the path for driver to be installed USB AVR Programmer installed USB AVR programmer is being connected and shown in device manager On Linux and MacOS X no kernel driver is needed. Windows requires a driver for USBasp : usbasp-windriver.2011-05-28.zip (274 kB)
Note: Windows Vista/7 x64 now support with new driver . update your drive with new one..
Programming the other microcontrollers:-
Hardware.
Schematic.
Connections to the traget microcontroller:-
* you can programe many microcontroller by using this schematic , all you need to do is that find out the data sheet of that mcu you want to program and check the pin configration. and the look for PIN MOSI MISO SCK and Reset , the connection will be as follows.
USB B type female Connector.
10 PIN IDC connector (which shown in the schematic)
154 comments:
if somebody mess with any short of problem to make it running then just make a comment or send me a e-mail.
i will provide live support.
Hi gaurav, is this tested or not because i am going to make your pcb to design that it will work directly or we have to do additional things.
MR GAUVRAV IAM MR SHINO I'D LIKE TO MAKE UR AVR,ATMEL89 PROGRAMMER,BUT I FIND UR SCHEMATICS MISSING SOME COMPONENT VALUES WHEN COMPARED TO PARTLIST 1:I FIND 100NF AS 100 PF WHEN IT COMES TO UR PCB DESIGN 2:U HAVE USED TO ELECTROLYTIC CAPACITORS WHEN UR SCHMATIC SHOWS ONLY 4.7MF AS THE ONLY ELECTROLYTIC USED.
I tried everything before writing this.
I was trying to connect an "ATMEGA 16A microcontroller" (which is impressed in a development board) with a "USB AVR programmer" by connecting through their isp header pins. I had connected them correctly using connecting wires. After that for checking whether i had connected them correctly or not i had written "avrdude -c usbtiny -p m16" in the command prompt.
Then it is giving the error writing.
"avrdude: error: programm enable: target doesn’t answer. 1 avrdude: initialization failed, rc=-1 Double check connections and try again, or use -F to override this check.
avrdude done. Thank you."
I am also mentioning here the links in which it is mentioned to write as above for checking of connections--------------
(1) http://elecrom.wordpress.com/2009/04. p-and-avrdude/ (2) http://www.newbiehack.com/MCUTestandCircuit.aspx.
Also when i was programming in AVR studio for blinking an led using the above two components. It is showing the programmer as disconnected and in AVR studio there is no device named "ATMEGA 16A". However there is a device named "ATMEGA 16". The power LED of the microcontroller is blinking continuously even when i make its "ON\OFF" switch OFF. What could be the possible causes of error and how can i rectify them so as to continue my programming in a smooth way. I also not able to understand about fuse bits. How can i know whether fuse bits of my microcontroller is screwed up or not and if they are screwed up how can i correct them? What could be the possible causes of error and how can i rectify them so as to continue my programming in a smooth way.
hello mr. ravi , I think that you changed the lfuse bits . i have the same problem , the newly purchased ic work without any problem but when we are changing the fuse bit it offering some the same problem , i solved it by using an another software http://atmega32-avr.com/Download/eXtreme_Burner-AVR.exe ---------------* enjoy*----------------------------- benson.
dear gaurav sir i hav a new atmega 8 ic and i want to use it for usbasp .kindly tell me how to burn the firmware in details if possible.and how about the usb avr programmer.kindly tell how to use the serial avr.
please email at pravat [email protected].
Can I program 89C51 & 89C52 with this programmer, if not then can you please suggest any serial or USB programmer project which I can build and no pre-programmed MCU is required to build.
Hello Gaurav Sir, I need some help with avrdude.
my email [email protected].
Hi I read ur AVR Serial programmer, its description is very clear with clear pictures. Please provide similar for USB Programmer for AVR also.
i will try my best to keep it simple what i m gonna do now i modify the page and explain it more clear.
if you still have a question the make a comment.
now i have given in very detail i hope you like it.
if you still need more detail then please tell me.
Please explain the circuit little bit section by section.
in the circuit there is.
a IC1 an atmega8 microcontroller which is working on 12mhz clock feeded by a crstal q1 ,,q1 with two 22pf grounded capasitors c4,c5 the job of these caps to stableize the clock.
okey atmega8 is responcilbe for every thing here i contains a firware which handle all the usb tasks like enumration, device derscribtor i/o commands ,every thing.
this fimware take command and data from the usb port and feed it to the terget mcu.
well atmega 8 is not actually a usb micro controller but sofware is so sophisticated that it can handle the usb tasks.
you see two resistors r1 and r2 these two 68r resistor cut down the current flowing from usb, to mcu pins and two zener diode d1 d2 the manage the voltage lavel of the signal lines as i tell you atmega8 is not usb mcu so we need to control the voltage and current our self cut in usb mcu a voltage regulator is in buit.
and there is a 2k2 resistor r3 at the 2 no line of the usb (D- line) The position of a resistor r3 on D+ or D- allows you to choose between the full-speed (12 Mbps) and lowspeed modes (1.5 Mbps). ( as per the usb sepecification 2.0)
it dos't mean if you change the position of r3 then this circuit will work faster the firmware also be changed for that.
you see a jumper j1 , it is to switch the power supply on and off ,,dilivering by the programmer to the target mcu.
there are two other jumper jp2 and jp3 .
jp3 is to switch between the slow programmeing clock and high progamming clock speed under some condition you need slow sck.
and at the jumper j2 you can use this jumper if you wish to updte or reprogramm the firmware of the programmer.
two led led1 and led2 are to indicate power and the programmer busy( progamming or reading)
r4 and r5 are just to cut down the current flow through leds.
r6 is just to pull the reset pin high under normal operation.
x2 is just a connector you can use any type of connector you want or may ba just use wire but i advice to you to use the usb and programming wire as short as possible.
thats every thing.
if you still need some thing just make a question.
sir, i am new to this field, i have atmega8L so please tell me what additional setting are to be done using this in h/w and s/w part.
there are capacitors missing in your ckt diag (c2 c6) so can u please tell me how many capacitors of which values are to be used.

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