Re: [Tinyos-help] cc2420 transmission delay and SFD timestamp

Hi Does it happen in every packet transmission? If no, maybe some packets are retransmitted by PacketLink Layer? 2011/3/28 蔡沅峰 > Dear all, > > > We have a high-data-rate application and we need to decrease the > transmission delay (between send.send and send.sendDone). > > The payload of our pa

[Tinyos-help] float ops issue

Hi list, I am working on an algorithm which performs intensive floating point operations (e.g. float matrix multiplications, roots, etc.) on the sensors. I found that if I deploy it on a micaZ/iris mote everything is ok and the job takes a time, say, t. If I try to use another kind of mote (e.g. i

Re: [Tinyos-help] cc2420 transmission delay and SFD timestamp

Hi, I think software processing also need time. In CC2420TransmitP.nc, before transmission, TX data has to be loaded from ram to CC2420 through SPI bus, I think it's a time-consuming operation. What's more, you can turned off radio backoff (through RadioBackoff interface provided by CC2420Active

Re: [Tinyos-help] Enabling and Using FastSpiByte Interface

Tobias Ang yahoo.com> writes: > > > > > Hi, > > I was wondering how I can enable the use of the FastSpiInterface and if replacing all the command calls in CC2420SpiP would bring the same functionality. Based on my understanding, it would help to speed up the SPI read and write speed. Also in

Re: [Tinyos-help] cc2420 transmission delay and SFD timestamp

hi, I did some measurements recently. I quantified the time taken by the different components. Here are my results: before Amsend.send() statement 64420 Send.send() 64426 send() 64427 AcquireSpiresource() 64431 before loadtxfifo() statement 64432 Loadtxfifo() 64433 before TXFIFO.write() stateme

[Tinyos-help] Help: Recompiling app.c alone after modification to initial app.c file

Hi Folks, Consider ' BlinkC ' application for example for an IRIS target. Once I build this application using 'make iris' command, the 'ncc' compiler generates a C -file named app.c & then an executable named main.exe My requirement is to split this build procedure:- First to generate only a C-fil

Re: [Tinyos-help] Help: Recompiling app.c alone after modification to initial app.c file

run the make with verbose and examine the commands being executed >From cPhone On Mar 29, 2011, at 2:25 PM, chandramouli k v wrote: > Hi Folks, > > Consider ' BlinkC ' application for example for an IRIS target. > Once I build this application using 'make iris' command, the 'ncc' compiler >