AMC 1.5 - missing device or unknown device -24

[Jeroen]

Hi,

I know i'm almost there, but there seems to be a problem with recognizing the atmega 8535.
Everything goes well untill I click the read-button. The red led is on while attempting to connect
to the amc, then I get the message "missing device or unknown device -24".

What can this be? Is it a bad connection on the amc?

gr. Jeroen

[egoexpress]

It is most likelly a cold solder spot, a shortcut, or a backwards placed part. Or perhaps the wireing is wrong. Please make high res pics of your AMC (both sides). Use a scanner if you have one available.

regards
Christian

[Jeroen]

Hi,

Here are 2 pics of the amc1.5...

[Michael N.]

I had the same Message with my ATMEGA. Did you try a another Crystal?, which Crystal are you using?. For example my ATMEGA wont work with a 24MHz Crystal, so i downgrade the Crystal to 22,18 MHz and it had worked. But you must use the correct firmware for each Crystal .

[Jeroen]

Hi,

Tried all 4 crystals. Same message.

Can it be a software problem?

gr. Jeroen

[tronicgr]

Hi,

I have a question. You told us you have Vista64. Is your account is the administrator's one? And I don't mean you having a account with administrators rights...!

howto-vista-and-x-sim-t1213.html

Maybe Vista doesn't allow ponyprog to control directly the com ports...


And last, if everything else fail, pay a visit to a friend that still has winXP and use his PC to program the firmware... This will confirm if the problem is on software or hardware...

Thanos

[Jeroen]

Hi,

Ok... re-installed xp 32 bits on my old computer. I installed the converter software and ponyprog2000. All went well...
I plugged the amc1.5 in and tried to read out the atmega. No succes... Still getting the
"device missing -24" error.
Both chips are powered... measured the pins.

What to do now? Does this mean that it is a hardware problem?

gr. Jeroen

[Jeroen]

Hi,

The atmega8535 was broken. Got a new 1 and now everything works ok. Installed the 22mhz hex file.
Program succesfull.

But now in the display the 3th and 4th numbers keep on changing automatically without and with a
potmeter. Is this normal?

gr. Jeroen

[egoexpress]

Is this normal?

Yes, pwm generated jamming Imo.
When my AMC is powered, I even have trouble to hold a stable BT connection with my mouse
But never mind...

However, you should keep the pot cable lenght as short as possible, and use shielded ones (e.g shielded audio cables) to reduce the noise. Use the cable shield as GND wire then.

Gruss
Christian

[egoexpress]

Btw, congrats that your AMC is working