Hi Horst,
Are you using the latest version from tinyos-main? You can change the
listen length in RF230RadioP.nc (chips/rf230) with this function:
command uint16_t LowPowerListeningConfig.getListenLength() { return 5; }
For us LPL on IRIS works perfectly fine.
Best,
Miklos
On Wed, Jun 15, 2011 at 4:36 PM, Horst Huchen
<[email protected]> wrote:
> Hi Christian,
> I have successfully changed the CCA check rate on my motes, but sadly is
> does not have any effect on my Packet loss rates. I tried values between 1U
> to 50L an proofed it with an Oscilloscope. I also tried to switch
> RF230_HARDWARE_ACK on but the result stays the same.
> Do have another idea how to fix that problem?
>
> Horst
> P.s.: LowPowerListeningLayerP.nc is in tos/chips/rf2xx/layers
>
> 2011/6/15 Christian Haas <[email protected]>
>>
>> On 06/15/2011 02:02 PM, Horst Huchen wrote:
>> > Hi,
>> > thanks for this hint. I've measured the CCA check length an you're right
>> > on
>> > TelosB motes it's about 10 ms and on Iris Motes 5ms.
>> > But I can't find any value like MAX_LPL_CCA_CHECKS for the RF230
>> > Transceiver. So I'm not able to change this interval. It seems that the
>> > MAX_LPL_CCA_CHECKS value only works for the CC2420 chip.
>>
>> Yes, the RF230 LPL is implemented in another way.
>>
>> You can find the value
>>
>> // minimum wakeup time to catch a transmission in milliseconds
>> LISTEN_WAKEUP = 6U, // use xxxL if LISTEN_WAKEUP * 10000 > 65535
>>
>> in the file LowPowerListeningLayerP.nc in tos/chips/rfxx/util.
>>
>> Christian
>>
>>
>>
>> --
>> Dipl. Inform. Christian Haas
>> Karlsruher Institut für Technologie
>> TM Prof. Dr. Zitterbart
>> Raum 102, Geb. 20.50
>> Engesserstraße 2 Rechts
>> 76128 Karlsruhe
>> Germany
>>
>> Tel.: +49 721 608-48673
>> Email:[email protected]
>> Jabber-ID: [email protected]
>>
>>
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>
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