Dear Giri and Michael, looking at the datasheet the firs 4 bits of low fuse byte are CKSEL, while bits 4 and 5 are SUT select. Now, my fuse low byte, default by tinyos 1.0.7, is 0xFF. Does this correspond to 8Mhz or 7.3728?
I'm asking you this because I'm getting some time interval measures, and I need to know exactly the frequency of the microcontroller. Thank you a lot in advance On 7/18/07, roberto pagliari <[EMAIL PROTECTED]> wrote:
Hi Michael, I get the following configuration fuse low byte 0xff fuse high byte 0xff fuse extended byte 0xff calibration byte 0xff - read only lock bits 0xff BLB12 -> 1 BLB11 -> 1 BLB02 -> 1 BLB01 -> 1 LB2 -> 1 LB1 -> 1 simply issuing the command >>uisp -dprog=data -dpart=ATmega128 --rd_fuses what did you mean by that? On 7/17/07, Michael Schippling <[EMAIL PROTECTED]> wrote: > > whew...now I don't have to go look up the config bytes... > Is there an internal osc that will run faster than the xtal? > > And are we certain that the config is really all 0xff? > That sounds too conveniently like a read error... > > MS > > > Giri Baleri wrote: > > The low byte value of 0xff indicates that the ATmega128 is configured > to > > use external oscillator. The frequency of the external oscillator is > > normally 7.3728 MHz. > > > > Giri > > > > > ------------------------------------------------------------------------ > > *From:* [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] *On Behalf Of > > *roberto pagliari > > *Sent:* Tuesday, July 17, 2007 3:27 PM > > *To:* [EMAIL PROTECTED] > > *Cc:* tinyos-help@Millennium.Berkeley.EDU > > *Subject:* Re: [Tinyos-help] atmega128 clock frequency > > > > my actual configuration, running > > uisp -dprog=data -dpart=ATmega128 --rd_fuses > > > > gives me the following > > fuse low byte 0xff > > fuse high byte 0xff > > fuse extended byte 0xff > > calibration byte 0xff - read only > > lock bits 0xff > > > > BLB12 -> 1 > > BLB11 -> 1 > > BLB02 -> 1 > > BLB01 -> 1 > > LB2 -> 1 > > LB1 -> 1 > > > > so, is it 7.3Mhz? > > > > On 7/17/07, *roberto pagliari* <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED] >> wrote: > > > > my fuse low byte is set to 0xff. this means the clock frequency is > > 7.3Mhz (not 8Mhz) right? > > > > thank you in advance > > > > > > On 7/17/07, *Michael Schippling* < [EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>> wrote: > > > > I think "change the crystal" is the only answer for the > ATMEGA. > > It's sounds like the MSP can be overclocked in software > though. > > MS > > > > roberto pagliari wrote: > > > how can I set the clock frequency of motes microcontroller? > > > > I'm using micaz mote right now > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > Tinyos-help mailing list > > > Tinyos-help@Millennium.Berkeley.EDU > > <mailto:Tinyos-help@Millennium.Berkeley.EDU> > > > > > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > <https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Tinyos-help mailing list > > Tinyos-help@Millennium.Berkeley.EDU > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >
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