Deogen - tiny monitor tester

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#1
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Hello all,
I updated the "tiny monitor tester" project, you can find the modifications in the projects section or at: http://www.eosystems.ro/deogen/d...

Software changelog:
* 1.0 DaCi 10.01.2007 Initial version
* 1.1 DaCi 25.08.2007 Added 1280x1024x60Hz resolution
* 1.2 DaCi 30.08.2007 Changed 1280x1024 H-Sync polarity to positive

Have fun,
Daniel

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I've been trying to get this project to work but can't figure out what I'm doing wrong. I've already locked myself out of one chip by setting the SUT_CKSEL fuse incorrectly. With CKDIV8 checked the horizontal sync runs at 1.543kHz, with it unchecked it runs at 12.37kHz. In 800x600 mode it runs at 1.858kHz checked and 14.88kHz unchecked. The H Sync from my computer at 800x600 is approximately 38 kHz. Is the SUT_CKSEL fuse what I need to change in order to make it work properly? If so what to? I don't want to lock up another chip... :/ I'm using AVR Studio 4.18 build 716.

Thanks,

Eric.

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After more than 3 years it seem the OP is not around anymore.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Possibly not but the project page lists it as being downloaded quite a bit, so there may be someone else that has used it successfully that can help. :)

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I had a quick look at the project. CKDIV8 must be OFF. The boards needs 20MHz.

You need one of the Ext. CRYSTAL 8MHz and up. There are 3 of them at the bottom of the list, I would use the middle one with the longest start up time of 65ms.

Also I suggest you use the BOD set at 4.3V.

If you have built the board correctly it should work.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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I thought that might be the case for for the crystal but I wasn't 100%. I had changed that fuse before but apparently chose the incorrect setting and now I'm locked out of that chip as it fails to enter programming mode. Thank you for the advice, I do appreciate it. I'll drop back in tomorrow after I have a chance to try it out. Right now, bed.

Thanks again,

Eric.

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If you are locked out of the chip because of wrong fuses try and inject a 1MHz clock into Xtal1.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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I think what I did was select one of the External clock settings, the ones with no stated frequency, instead of external crystal oscillator. As for the other settings, "IT'S ALIVE! ALIVE!" Thank you for your advice, this thing's gonna be a big help when my friends ask for help with dead monitors.

Eric

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Clever handle.

Imagecraft compiler user

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bobgardner wrote:
Clever handle.

Thank you. :)