Problems with the last firmware

[therapix]

Sorry, I was not using either the tester. Now if I get 5V between 10 and 11 pin's of Atmega.

1. 2.02V
2. -4.67MOhm

[dmitri]

Sorry, I was not using either the tester. Now if I get 5V between 10 and 11 pin's of Atmega.

1. 2.02V

If it's 2.02v between ground and pin 20 of pic18f2550, pic18f2550 should not be working at all and you should not be able to see a 'USB Audio Device'. Are you sure you're measuring right?

2. -4.67MOhm

It cannot be negative. Did you power off it before measuring resistance?
Also measure resistance between pin 11 of Atmega and both pins 8 and 19 of pic18f2550.

[therapix]

Sorry. I'm very clumsy! Forget me
previous message, I have the wrong pin.

The values I get are:

-Atmega pin 10 with Atmega pin 11 = 5V
-pic pin 20 with GND = 5V
-pic pin 20 with Atmega pin 10 = 1.7 Ohm
-pic pin 8 with Atmega pin 11 = 00.2 Ohm
-pic pin 19 with Atmega pin 11 = 00.2 Ohm

Thanks for your patience ...

[dmitri]

So, you have +5V on both Atmega and PIC18F2550 but you're not able to program Atmega, right?
Then read again viewtopic.php?p=5216#p5216 from this thread and follow my advice.

[therapix]

Problem solved.

Today I have finally assembled a new Atmega Synthex sent to me.

I think the old Atmega that was damaged by working to 20MHz. Neither LPT or USB cable you could update the firmware. When 40% of the carrying firmware is downloaded, it said had completed, but not worked well.

Thanks to Dmitri for the help and patience that has taken in this post.

I hope not to have more problems, because I am a novice in these matters ...

a greeting.