'KROT2-XM' (mole), new project Xmega32

[reptooyep]

Hi, just PM me for the adress and send me the chip with a stamped return envelope.
Regard

[OCBSlimz]

whats the difference between an ATXMEGA32A4 and an ATXMEGA32A? Ive got a USBASP programmer, whats the wiring diagram for that I Have looked at the link for that above and cannot find the right wiring diagram.

[timekiller]

ATXMEGA32A4 can be programmed only through the 2 chanel PDI , Program and Debug Interface

[reptooyep]

You can modify USBASP to handle PDI and Standard AVR protocol.
You need to make an adapter board such as the link above and add a 3.3v regulator
On vcc. Then, you need to update the firmware of usbasp with a second one.
Then, you can program XMEGA.
I did the board but i didn't update the firmware cause now, i have ATMEL ICE.
I'll share the layout later

[OCBSlimz]

But an atxmega32a-au can be used with this project ?

[timekiller]

I think not. atxmega32a-au it is different.

[reptooyep]

PDI adapter for USBASP

Hi,
As promise, i share the layout file and the placement of the PDI adapter board for USBASP.
To use it, you need to update the USBASP firmware with a secondUSBASP device and also update AVRDUDE. See the link HERE
Enjoy
ADAPTATEUR USBASP ISP.zip

[OCBSlimz]

Hip reptooyep.

I have the usbasp version where I can switch to 3.3v using a jumper. Do I proceed with the original plan you posted above ?

[reptooyep]

Hi,
By switching the power supply, you'll only put 3.3v on VCC of the 10 pins port. The outputs of the ATMEGA8 of the USBASP will still be 5v, this will cause to burn the inputs of your XMEGA.
You have two solutions :
1st : You put the jumper on 3.3v an you add an adapter board with the resistors and the zener diodes
2nd : You keep the 5v jumper and you add an adapter board with a 3.3v regulator, the resistors and the zener diodes.

I would prefere the second one cause you can program ATMEGA and XMEGA without making mods to your USBASP.

But it's up to you ..

[OCBSlimz]

Ok. Easy enough for me to do. Cheers for helping me. Have you completed your project ?

I'm looking to put a large 50 cm coil on it. Could you help me with that?

Also...

Could somebody confirm the values of ..

C6
C7
C11
C28?
it is uF?

Thanks .

[reptooyep]

"Mkf" of russian schematics means "microfarad".
It's not realy clear cause on the same schematic, the big condensers are marked "470" for 470uf.

For your coil question, i can't help you. All i can say is that you should use a coil calculator
To fit the requirements. I'de like to see how do you make a rigid and light coil shell like this...
You'll have to test by yourself, i don't think anybody has tested this before you..

I'm waiting for the crystal and i have only 5v lcd, i must buy some. I just received my coil shell so, i'll make it soon.

[OCBSlimz]

Ok. Thanks. What she'll did you get for the PCB?

[OCBSlimz]

Ok thanks ! What shell did you get for the PCB?

[ODM]

Reptooyep: A good number of HD44780 character lcd module clones are happy to run 3.3V logic voltage with a negative contrast voltage, like this circuit seemingly does. It is unlikely to break a LCM.

[reptooyep]

Oh, it sounds good... I'll test this.
Where do you get the negative power supply ?
The board gets 8 volts input, i can also add a 5volts regulator just for the lcd.
The CMOS logig 1 is about 2v so, no problem for this.