hotshot05
Junior Member level 2
i am building a USBAsp based AVR burning kit by using the schematic provided at fischl.de - USBasp - USB programmer for Atmel AVR controllers
I am using the latest firmware.
I set the fusebits as hfuse=C9 and lfuse=EF (this is defined in the USBAsp makefile)
[but some people have mentioned some different fuse bits. one said hfuse=E9 lfuse=EF]
The two LED s glow but PC and laptop both say "USB device not reognised. A USB device attached to this computer has malfunctioned"
I checked the full circuit. Could find no problem.
I was checking the voltages at different points on the circuit. I found that if I connected the multimeter directly across Pin 7 and 8 of atmega8, it shows 2.5V
When I checked the voltage level at the input pin of the USB port, it shows 5.4V. But sometimes, the voltage rises to 5.8V.
Also when I check the voltage at the pins of the oscillator with respect to ground, I get 0V at both pins. I am using 22pf capacitors. Should the voltage at the oscillator pins be 0V?
I cannot understand what i am doing wrong.
I am using the latest firmware.
I set the fusebits as hfuse=C9 and lfuse=EF (this is defined in the USBAsp makefile)
[but some people have mentioned some different fuse bits. one said hfuse=E9 lfuse=EF]
The two LED s glow but PC and laptop both say "USB device not reognised. A USB device attached to this computer has malfunctioned"
I checked the full circuit. Could find no problem.
I was checking the voltages at different points on the circuit. I found that if I connected the multimeter directly across Pin 7 and 8 of atmega8, it shows 2.5V
When I checked the voltage level at the input pin of the USB port, it shows 5.4V. But sometimes, the voltage rises to 5.8V.
Also when I check the voltage at the pins of the oscillator with respect to ground, I get 0V at both pins. I am using 22pf capacitors. Should the voltage at the oscillator pins be 0V?
I cannot understand what i am doing wrong.
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