Are you able to communicate with the chip?
Can you read the fuses?
If not see if you have set the programmer data correctly (port and type)
I use AVR8 Burn-O-Mat avrdude GUI ,
it is also a front end for avrdude, I haven't tried Sinaprog
Can you write any of the fuses with Sinaprog?
Can the chip be write protected, if so I think you need to do a full erase to write it.
I never had a problem with Burn-O-Mat, I have no idea what is wrong.
Writing F9 will disable serial programming. There should be some sort of protection for accidental disabling of serial programming (safe mode).
Try to switch off safe mode if there is an option. (I dont use sinaporg or burn-o-mat).
By the way why are you trying to disable serial programming. It is safer to use lock bits.
If I just make the lock bits to lock the code can anyone else change the lock bits back to 3f and read the code ? This is reason I was disabling the serial programming..
I am confused here, I think I have accidentally wasted my chip, Now is it possible to completely lock the chip by just using lock bits , means no one can rechange to these lock bits?I am newbie to AVR , please suggest
1) you cant write anything into the chip. So the fusebits or lockbits cant be modified.
The only exception are the lockbits which allow to program a higher level of protection (allows changing unprogrammed bits to programmed, but not the other way around) so when you are in level 2 that prevents further programming but allows read back you can change the lockbit to a higher level (level 3) to lock the read back as well.
I don't see a problem with the fuses, it should be working.
Have you tried with CKOPT programmed to see if you get a different result?
Are you sure that your crystal is OK?
hello,Are you sure that this isn't a problem of your programmer device?
Are you able to communicate normally if you set the clock to internal RC 8MHz?
Setting jumpers:
J1 Power target
Supply target with 5V (USB voltage). Be careful with this option, the
circuit isn't protected against short circuit!
J2 Jumper for firmware upgrade (not self-upgradable)
Set this jumper for flashing the ATMega(4)8 of USBasp with another working
programmer.
J3 SCK option
If the target clock is lower than 1,5 MHz, you have to set this jumper.
Then SCK is scaled down from 375 kHz to about 8 kHz.
Yes sir,USBasb has a jumper for slow clock operation , are you sure it isn't placed?
I'm not sure what else to suggest, I never had such a problem.
Are you sure that your connections around the crystal are correct?
Double check the pins where the crystal is connected.
Can you try with a lower freq crystal like 4MHz or 2 or 1MHz?
I'm not sure what else to suggest, I never had such a problem.
Are you sure that your connections around the crystal are correct?
Double check the pins where the crystal is connected.
Can you try with a lower freq crystal like 4MHz or 2 or 1MHz?
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