Objective Development Forums

Re: USB-device on ATMega8.

2009-11-02T18:52:56+02:00

I understand, but calibration does not work properly. OSCAL value is incorrect after calibration and device does not recognized

Statistics: Posted by Guest — Mon Nov 02, 2009 6:52 pm

Re: USB-device on ATMega8.

2009-11-01T10:48:43+02:00

If you use the 12.8 MHz module (the 12 MHz module won't work because it requires an EXACT clock rate), you also need to add the oscillator calibration. There are two types, see the libs-device directory in the driver distribution. The calibration will tune the oscillator from 8 MHz to 12.8 MHz.

Statistics: Posted by christian — Sun Nov 01, 2009 10:48 am

Re: USB-device on ATMega8.

2009-11-01T02:36:31+02:00

I was run hid-mouse example after set calibration register to 226 value (manually). But calibration algorythm calculate another value for 12Mhz non-crystal Atmega8 (I see it in EEPROM), and device does not recognize

Statistics: Posted by Guest — Sun Nov 01, 2009 2:36 am

Re: USB-device on ATMega8.

2009-11-01T02:29:45+02:00

I try to use autocalibration algorythm for ATMega8 and it does not work. Maybe because ATMega8 with the built-in RC oscillator has initial frequency 8Mhz

Statistics: Posted by Guest — Sun Nov 01, 2009 2:29 am

Re: USB-device on ATMega8.

2009-10-28T16:46:26+02:00

You can use the 12.8 MHz version on the Mega8 with the built-in RC oscillator.

Statistics: Posted by christian — Wed Oct 28, 2009 4:46 pm

USB-device on ATMega8.

2009-10-28T12:42:27+02:00

Prompt please, whether probably to make the USB-device on chip ATMega8, using the built in RC-generator?

Statistics: Posted by uchar — Wed Oct 28, 2009 12:42 pm