avr microcontroller:: code burning problem

[arun_nr]

im using atmega 8  and have a usbasp programmer.i am unable to burn the code in to the controller.
im getting this error:


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.

i hav'nt connected an oscillator between pins "xtal".but i was able to burn code like that when i used a parallel port.?
wat could b d problem.

[joe61]

It's hard to say, you just don't give enough information. You could try searching the avrdude documentation for the error string you're seeing. Or try google, for example, avrdude "target doesn't answer". That led to the following discussion which may be helpful http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=79349

if this doesn't help, try asking again with more information, like the OS you're using, the programmer (usbasp == usbisp?), your makefile or avrdude command line, relevant section from avrdude.conf, etc.

Joe

[arun_nr]

thank you for your reply.

im using usbasp and im doing it on Ubuntu and command line.

[arun_nr]

if this doesn't help, try asking again with more information, like the OS you're using, the programmer (usbasp == usbisp?), your makefile or avrdude command line, relevant section from avrdude.conf, etc.

[arun_nr]

heiiii my usbasp hav only 5 pins miso mosi sck gnd and rst.and while doing on breadboard it gives
arun@ubuntu:~/blinking-LED$ sudo avrdude -c usbasp -p m8

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.

how can i sort out the problem.normally other usbasp's i saw hav a vcc pin too.

[joe61]

how can i sort out the problem.normally other usbasp's i saw hav a vcc pin too.

I suspect that the programmer isn't correct. It should have a VCC pin - see http://www.atmel.com/dyn/resources/prod_documents/doc0943.pdf for details but normally either the programmer supplies power to the circuit or gets power from the circuit. It needs a VCC pin to do that.

If you have access to another programmer, give that a try. I normally use a USBTiny from Adafruit, but there are other good ones as well.

Joe

[arun_nr]

is it necessary that you connect aref pin also to the supply while burning the code to the targer

[joe61]

This is a link to the ATMega8 data sheet: http://www.atmel.com/dyn/resources/prod_documents/doc2486.pdf

In the section called "Serial Programming Pin Mapping" it shows a diagram which tells you how to do it.

Did you look at the other document I referred you to? It has explanations there too.

Joe

[shamikrudra]

your programmer not providing power to the target chip. are you giving power to the target chip from outside? other than 5 connection you have mention VCC is required for atmega 8 vcc and avcc should be connected and you should connect both the ground pins. connect a crystal for safety if you change the osc frequency.