On 05/25/2012 06:58 PM, András Bíró wrote: > Hi, > On Thu, May 24, 2012 at 4:30 PM, Ugo Colesanti > > <colesa...@dis.uniroma1.it> wrote: >> Thanks for your help. If I have correctly understood what you are saying, I >> have the following options (none of them is nice): > You can still change the hardware :) I bought for of this devices... must find something to do with them :)
>> - Use the external Transceiver Oscillator as Symbol Counter and manage the >> transceiver driver to avoid sleep mode (it seems quite complicated). >> >> I've checked the fuses of the zigduino, they are set as: low_fuses=0xFF , >> high_fuses=0xDA , extended_fuses=0xF5 >> The low fuse is set to select the external 16Mhz transceiver oscillator, >> thus, I started following the second option. It seems to work even if the >> timer stops if I force the atmega128rfa1 to standby mode (it shouldn't do >> that) while keeping the idle mode works fine. > Strange, but good to know. Maybe I made something wrong, I will check again... >> Ugo >> >> p.s. the McuInitP does not seem to support the external oscillator since all >> the CLKPR values assumes internal RCOscillator with 1:2 prescaler. I forced >> CLKPR to 0x00 since the default value, 0x0f was for RC Oscillator only. > You're right, there should be a define for that. > > Andris Thanks again for your help. Ugo >> >> >> >> On 05/23/2012 10:11 PM, András Bíró wrote: >>> Hi Ugo, >>> >>> On Wed, May 23, 2012 at 5:37 PM, Ugo Colesanti >>> <colesa...@dis.uniroma1.it> wrote: >>>> I managed to have TimerMilli working without re-wiring: >>>> - I used Blink as test >>>> - I changed SYM_TIMER_MODE to ATMRFA1_CLKSC_XTAL but it was not enough >>>> since as the datasheet says: "If the transceiver goes from active mode >>>> into sleep mode, the symbol counter clock source is switched to the RTC >>>> clock automatically [...] After wake up, the counter switches back to >>>> the clock source which was selected before going to sleep mode." >>>> - Hence, I added ActiveMessageC and started it, but TimerMilli was >>>> still not working >>>> - Then I found this thread: >>>> >>>> http://www.avrfreaks.net/index.php?name=PNphpBB2&file=printview&t=110931&start=0 >>>> >>>> <http://www.avrfreaks.net/index.php?name=PNphpBB2&file=printview&t=110931&start=0> >>>> where it seems that when the radio exits sleep mode, it does not select >>>> XTAL unless the following code is run: >>>> >>>> ASSR_struct.as2 = 1; >>>> ASSR_struct.as2 = 0; >>>> >>>> the code enables and disables the RTC. >>>> - Thus, in the splitControl.startDone of Active message I added: >>>> >>>> atomic{ >>>> ASSR = 1<< AS2; >>>> ASSR = 0<< AS2; >>>> } >>>> >>>> and yep, it worked :) >>>> >>>> By the way I realized that without the RTC, the symbol counter as >>>> TimerMilli is useless since it would be stopped each time the radio >>>> would go into sleep state, thus i think that re-wiring everything to >>>> TMcu as previously done is better. Isn't it? >>> First of all, I'm not really familiar with the new (or the old) timer >>> stack, but I'm quite familiar with the rfa1 (I wrote some of the >>> drivers for it, and I'm still working with rfa1 based motes). >>> >>> Both solutions are bad, but I'm not sure which one is less bad. >>> >>> First, the internal RC oscillator is quite inaccurate. The 16MHz radio >>> crystal is much better, but it's way too fast for RTC usage, if you >>> scale it down to millisecs, the nominal frequency error will be much >>> bigger then a 32 kHz crystal. >>> >>> The bigger problem is the energy. You're correct, you need the radio >>> in TRX_OFF mode to use it's oscillator. Turning it on with >>> ActiveMessage brings the transciever to RX_ON mode, and I think it >>> consumes much more power than TRX_OFF. However turning the transciever >>> on without messing up the state machine of the radio timer is not an >>> easy task. >>> >>> If you want to use the main clock, it will never let the mcu to enter >>> power-down/power-save mode (only standby/extended standby). By the >>> way, you have to do this manually with connecting >>> McuPowerOverride/McuPowerState interfaces to McuSleepC. >>> >>> If I were you, I would use the main clock, and if I need more accurate >>> timing, I would change the corresponding fuses on the mcu to use the >>> radio crystal for the main clock. >>> >>> Andirs >>> >>>> Ugo >>>> >>>> On 05/21/2012 06:30 PM, Ugo Colesanti wrote: >>>>> Hi, I just made the port of TinyOS-2.1.2-rc1 for the Zigduino platform, >>>>> an arduino clone with atmega128rfa1 chip. The porting was pretty simple >>>>> since the atm128rfa1 is already supported. The only issue I had was >>>>> related to the missing RTC on the zigduino which is used by TimerMilli >>>>> and Alarm62khz components. I made everything work by applying the >>>>> following changes: >>>>> - I re-wired AlarmMilli32C and CounterMilli32C to AlarmMicro32C and >>>>> CounterMicro32C respectively >>>>> - I used AlarmMicro32C and LocalTimerMicroC in the RFA1DriverLayerC >>>>> - I redefined TRadio as TMicro and set RADIO_ALARM_MICROSEC to 1 and >>>>> RADIO_ALARM_MILLI_EXP to 0 in RadioConfig.h >>>>> >>>>> With these changes I've been able to successfully run Blink, >>>>> RadioCountToLeds,tests/TestNetworkLPL and tutorial/Printf . However I >>>>> think there is a cleaner way to get the millitimer and 62khz timer to >>>>> properly work on zigduino. In particular I think there is a way to tell >>>>> tinyos to use the XTAL1 instead of OSC1 at least for Alarm62khz. I >>>>> tried to set SYM_TIMER_MODE to ATMRFA1_CLKSC_XTAL in TimerConfig.h >>>>> but it has not worked. Probably I missed some steps but I get lost with >>>>> all those timers :S >>>>> Does somebody have any suggestion? >>>>> >>>>> Ugo >>>>> >>>>> p.s. I put my code on: http://code.google.com/p/zigduino-tinyos/ >>>>> >>>>> >>>>> >>>>> >>>> -- >>>> Ugo Maria Colesanti >>>> Dipartimento di Informatica e Sistemistica >>>> Sapienza Universita' di Roma >>>> Via Ariosto 25, II floor, room B221 >>>> 00185, Rome >>>> http://wiserver.dis.uniroma1.it/cms/index.php?id=8 >>>> Phone: +39 06 77274003 >>>> Fax: +39 06 77274002 >>>> >>>> _______________________________________________ >>>> Tinyos-help mailing list >>>> Tinyos-help@millennium.berkeley.edu >>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> >> >> -- >> Ugo Maria Colesanti >> Dipartimento di Informatica e Sistemistica >> Sapienza Universita' di Roma >> Via Ariosto 25, II floor, room B221 >> 00185, Rome >> http://wiserver.dis.uniroma1.it/cms/index.php?id=8 >> Phone: +39 06 77274003 >> Fax: +39 06 77274002 >> -- Ugo Maria Colesanti Dipartimento di Informatica e Sistemistica Sapienza Universita' di Roma Via Ariosto 25, II floor, room B221 00185, Rome http://wiserver.dis.uniroma1.it/cms/index.php?id=8 Phone: +39 06 77274003 Fax: +39 06 77274002 _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
