[Tinyos-help] Flooding Algorithm
Hi,I needdocuments for this routing algorithm and implmentations ( inTinyOSenviroment )if there is. Can anyone help? Any links or files would be good.Erkan Do you Yahoo!? Get on board. You're invited to try the new Yahoo! Mail Beta.___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] TinyOS 2.0 and IEEE 802.15.4 compliant motes
Hi all, I want to work exclusively with TinyOS 2.0 and IEEE 802.15.4 compliant motes since that seems to be the two standards which are attracting a lot of focus. I am new to TinyOS / embedded programming and therefore need as much working demo application code and tutorial code as possible to get started. 1. What platform from the official TinyOS 2.0 list seems best suited for that task and how many motes is deemed necessary (or recommended), in order to exemplify the various demo apps? It should be possible for the motes in question to implement RFID tags. 2. Has any work with TinyOS 2.0 and TinyDB been done yet? Any comments are appreciated, thanks. Mikael ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Maximum data rate on the radio?
Hi What is the (practical) maximum data rate on the radio? I`m using the tmote hardware from moteiv. I have seen these values: - max 25 packages / sec - max 29b / package that is.. 25 * 29 * 8 = 5.8kbps. Correct?? But motive has this information on their homepage: - 250kbps 2.4GHz IEEE 802.15.4 Chipcon Wireless Transceiver I would like to sample data from one or more units at as high speed as possible and send the sampled data in realtime on radio to a master unit. /Henric ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Synchronization and high data rate on radio?
Hi I have posted these questions a few times but never got any clear answers. I would be pleased if someone could give me some answers this time. 1. Why does netsync require lowpower mode? And what does it actually mean to compile with the lowpower flag? 2. Is it possible to send data with high data rate on the radio when using synchronization with netsync? (high data rate = same data rate as without using netsync) 3. Is there any other way to get a synchronized global time without using netsync? /Henric ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] testing MultiHopRSSI
Hi! I'm trying to test the MultiHopRSSI on Tmote Sky , I have had to add some files as RouteStatics as well as modifying multihop.h and multihop.nc because I want it to be tested with Delta (so I have to do it compatible). But I'm finding it rather difficult (changing too much things to avoid the compiler errors) and I'm wondering if there is any other way to test it or the RSSI doesn't work... Thanks! Jesus Serna. Valencia PD I've found that it has some extra files as WMAWMEMultihop.nc, without connection to MultiHop.nc or MultiHopEngineM.nc, and it has the same information as MintRoute... ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] inject commands at runtime in tinyviz
You can talk to the simulated mote with id 0 through serial forwarder and using tossim-serial@hostname. I am not sure but it seems you can send to ANY mote's radio by using [EMAIL PROTECTED]; I have not tested this and have actually just noticed the feature. Alternatively, you can set a mote's ADC channel in TinyViz and program the mote to read and react to certain values. -- Warm regards, Darren Bishop, MSc, BSc (Hons), MBCS On Monday 31 July 2006 03:02, Nilay Chheda wrote: Hi, I am running my simulations on TOSSIM ( tinyviz ). Is there any way I can inject commands into the network of motes at runtime. Thanks Nilay ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Can Stargate be connected to Telos
Hi,I have a question about Stargate from Crossbow. Can it be connected to Telos (either from Moteiv or Crossbow) or other motes? Thanks.Regards,Haibin ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Source Code for Trickle
On Jul 30, 2006, at 4:59 PM, Joe Polastre wrote: NetSync in Boomerang uses a trickle-like system too. Trickle is fairly easy to implement from the paper, the intricacies occur when you try to bind it with a particular data pattern--ie bulk dissemination, network synchronization, or commands. Because of this, you find all these different implementations of Trickle tuned to different use cases. In particular, Trickle relies on concise, comparable metadata. Depending on the data being disseminated, this metadata can take different forms. For example, Maté and Deluge (that's a fourth implementation) can encode the full metadata in a packet, while Drip The code in tinyos-2.x/tos/lib/net/ is intended to be a very general implementation that depends on version numbers. It separates out the transmission mechanism from the timer mechanism, as well. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Maximum data rate on the radio?
On Jul 31, 2006, at 5:58 AM, Matthew J Whelan wrote: Henric, The maximum theoretical data rate of the CC2420 is 250kbps. However to achieve anywhere near this rate, you have to carefully schedule transmissions to avoid packet collisions and loss. I can't quote you any rates achievable using any of the standard radio libraries or base applications, as I have had some problems with transparency of the code and would rather write my own than try to figure out someone elses. To be honest, I have had a problem using the base applications provided with TinyOS when sending at a high rate from multiple motes and I would very much recommend that you write your own base application if you intend to push a lot of data across the radio. Using my own base application, I have recieved data from 10 motes, sending 99byte packets at a rate of 7 packets per second (approx. 700bytes/mote/sec or 70kbps total) with virtually no packet loss at all (nearly all motes have 100% success after 5-10 minutes). I am convinced that the radio can handle MUCH HIGHER rates than that, even the 250kbps, though it takes careful software development and knowledge of the CC2420 chip. I need to invest in more motes before I push my network to the limits in terms of data rate, but I thought that I would let you know that the numbers you have seen have grossly underestimated the radio data rate. A lot of it comes down to MAC backoff times. Out of the box, a TinyOS 1.x or 2.x node can send about 240 pps, where each packet has a 28 or 29 byte payload. If you do not obey CSMA backoff, 1.x can get about 300 pps and 2.x can get something like 600 pps. Boomerang, IIRC, can get about 500 pps when it batches transmissions (disables CSMA). On the software side, the limiting factor is usually reception, not transmission. That is, the pps rate isn't limited by how fast the transmitter can transmit them, but by how fast a receiver can receive them. E.g., 1.x can send ~600 pps, but can only receive around 300 before the receive path runs into issues (the FIFO flush in response to multiple packets being buffered). These numbers are all CC2420 specific. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
RE: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x
Thanks for your answer, in my program i allocate memory to create in each mote a buffer-chain (i use structures that allocate memory dynamically). But i don't know exactly how much dynamic memory i can use in Micaz motes. For example, if after compiling i use 1419 bytes in RAM and 19748 bytes in ROM, is the rest used for dynamic allocation? i don't understand this passage about exactly how much memory i can use dynamically..for me understanding would be really important. Thanks for your availability, Cheers Daniele -Original Message- From: Michael Schippling [mailto:[EMAIL PROTECTED] Sent: Fri 7/28/2006 7:12 PM To: Munaretto, Daniel Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x Well there's 128K of PROM and 4K of RAM in the ATMEGA 128 and I believe it is all available. At the end of the TOS compile you get a line that says how much your program is using. If you are not doing any kind of dynamic allocation this should be the maximum used. Perhaps you have a pointer or something that is running amuck in a way that you don't see in simulation. I think using FLASH is rather slow and the number of MTBF cycles is not conducive to temporary storage. MS Munaretto, Daniel wrote: I did other experiments and i found that, with little data size, the nodes are able to send and receive all packets they generate. So it's definitely a memory problem. But i think not to use so much memory and i free, when i can, the used structures. Remember i need a buffer chain in each node cause i store incoming packets and then i create new coded packets from these buffers. Now my question is: with Micaz motes, tinyos 1.x, how much memory in ROM and RAM can i use? and is it possible to use the FLASH memory?if yes how?and what's the size of it? If possible, i'd like to receive very precise informations for understanding my problem in the best way. Thanks very much for your availability cheers Daniele -Original Message- From: Michael Schippling [mailto:[EMAIL PROTECTED] Sent: Thu 7/27/2006 9:25 PM To: Munaretto, Daniel Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x Sounds like your buffering scheme is overflowing and crashing the mote. One clue is that I seem to see a lot of length 5 buffer pools in TOS... You might want to double check that you are freeing buffers after use. MS Munaretto, Daniel wrote: Hi all, after a lot of simulation in TOSSIM, i uploaded my programs on the motes. By reading the leds, i'm able to understand what happens. If i run on motes a normal flooding, it's all ok. All packets are sent and received. But if i run a more complex program, where before broadcasting packets i code packets i stored in the node's internal buffer, i notice i cannot receive over 5 packets (in my experiments i generate 8 packets per node). But if i run only one mote, it's able to generate all packets. So if i run 2 nodes, one seems blocked or crashed after receiving 5 packets (Leds stop to work, fixed on a color or void) and the other one continue to send packets in a properly way. I made with several motes and it's the same, also changing batteries. Anyone could help me, please? i don't know what's wrong, in TOSSIM was all ok. And i'm using micaz motes, tinyos 1.x, after compiling i see: used RAM=1657 bytes, used ROM=19600 bytes. Thanks very much, i hope someone could answer to me! cheers Daniele ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU 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
[Tinyos-help] Question
Hello,
I have a question regarding a message transmission problem that I encounter. I
run a TinyOS application with 200 nodes, with the following configuration file:
configuration test_filter {
}
implementation {
components Main, test_filterM, SingleTimer, LedsC, PotC, GenericComm as Comm,
RandomLFSR;
Main.StdControl - SingleTimer.StdControl;
Main.StdControl - test_filterM.StdControl;
test_filterM.Timer - SingleTimer.Timer;
test_filterM.Leds - LedsC;
test_filterM.CommControl - Comm;
test_filterM.SendMsg - Comm.SendMsg[1];
test_filterM.ReceiveMsg - Comm.ReceiveMsg[1];
test_filterM.Random - RandomLFSR;
}
A am building a routing tree over those nodes, using a sparse bit error graph
(about 10 neighbors have 0 bit-errors, and the rest have 0.5) and the problem is
that after multiple message broadcasts, well into the process, I encounter a
case where a node repeatedly transmits a message (using call SendMsg.send) and
its intended recipient does not register it (using event ReceiveMsg.receive).
There are no other nodes that transmit at this time, just node A which tries to
send a message to node B, which is targeted specifically to B (not a broadcast).
The bit error between them is 0, and yet node B does not register the message. B
has previously received messages from A before the current attempt on A's
behalf. Source code and status logs can be provided on request.
Why does this situation arise? Is it possible that there is some kind of
overflow of internal message queues? Is it because of the methods use to send
and receive? Can you suggest an alternative?
Svilen Mihaylov
- End forwarded message -
___
Tinyos-help mailing list
Tinyos-help@Millennium.Berkeley.EDU
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Can Stargate be connected to Telos
Yes. You need to load the ftdi_sio kernel module on the Stargate. Please contact the Stargate user's mailing list. -Joe On 7/31/06, Liu Haibin [EMAIL PROTECTED] wrote: Hi, I have a question about Stargate from Crossbow. Can it be connected to Telos (either from Moteiv or Crossbow) or other motes? Thanks. Regards, Haibin ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU 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
Re: [Tinyos-help] Question
I've had problems like that when the task queue overflows. The default
size is 8, you might want to increase it to 32 or so.
Aaron
On Mon, 2006-07-31 at 13:38 -0400, [EMAIL PROTECTED] wrote:
Hello,
I have a question regarding a message transmission problem that I encounter. I
run a TinyOS application with 200 nodes, with the following configuration
file:
configuration test_filter {
}
implementation {
components Main, test_filterM, SingleTimer, LedsC, PotC, GenericComm as
Comm,
RandomLFSR;
Main.StdControl - SingleTimer.StdControl;
Main.StdControl - test_filterM.StdControl;
test_filterM.Timer - SingleTimer.Timer;
test_filterM.Leds - LedsC;
test_filterM.CommControl - Comm;
test_filterM.SendMsg - Comm.SendMsg[1];
test_filterM.ReceiveMsg - Comm.ReceiveMsg[1];
test_filterM.Random - RandomLFSR;
}
A am building a routing tree over those nodes, using a sparse bit error graph
(about 10 neighbors have 0 bit-errors, and the rest have 0.5) and the problem
is
that after multiple message broadcasts, well into the process, I encounter a
case where a node repeatedly transmits a message (using call SendMsg.send) and
its intended recipient does not register it (using event ReceiveMsg.receive).
There are no other nodes that transmit at this time, just node A which tries
to
send a message to node B, which is targeted specifically to B (not a
broadcast).
The bit error between them is 0, and yet node B does not register the
message. B
has previously received messages from A before the current attempt on A's
behalf. Source code and status logs can be provided on request.
Why does this situation arise? Is it possible that there is some kind of
overflow of internal message queues? Is it because of the methods use to send
and receive? Can you suggest an alternative?
Svilen Mihaylov
- End forwarded message -
___
Tinyos-help mailing list
Tinyos-help@Millennium.Berkeley.EDU
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
Re: [Tinyos-help] HPLTimer3 on Micaz using tinyos-1.x
Just a couple tidbits... nesc -v will list all the included files, but won't give you the dependencies you want. You might be able to do some binary searching by eliminating source files though. You can also try grepping clock.h in all the source directories, or use Eclipse or other IDE search facilities. As far as I know only tos.h is included automagically, without any reference in a source file. But why fight nature? Can't you use the common defs in the TOS header and just add whatever you need in yours? MS Michael Collett wrote: Hi, Thanks for the advice on registers. I’m still trying to get Timer3 to work on my MicaZ using TinyOs-1.x though: 1) Can I first check that I have the general shape of the components and interfaces right: HPLTimer3M.nc (with HPLTimer3.h) / *Clock16.nc / Clock3C.nc (with Clock3.h) / *Clock16.nc / Timer3M.nc (with Timer3.h) / *Timer3.nc / Timer3C.nc / *Timer3.nc / MyApplicationM.nc (*Interface.) 2) Another problem I’m having is that many of the variables I’m trying to use are already defined in Clock.h etc. I’m trying to fix it so that only my version: Clock3.h is included. Despite having accounted for this in all the files involved in my application, when compiling Clock.h is still taken from platform/mica128. This also occurs with HPLTimer1, despite the fact I’ve not included it in any of my application components. I could rename all the variables, but I want to make sure that I’m not using the wrong version of the header files somewhere along the line. Is there a component which uses a timer which I may be overlooking (Something which is always included at compilation)? Thanks, Mike ** Wireless Communications Enabling Metrology Division National Physical Laboratory Hampton road Teddington United Kingdom TW11 0LW 0208 943 6771 www.npl.co.uk ** --- This e-mail and any attachments may contain confidential and/or privileged material; it is for the intended addressee(s) only. If you are not a named addressee, you must not use, retain or disclose such information. NPL Management Ltd cannot guarantee that the e-mail or any attachments are free from viruses. NPL Management Ltd. Registered in England and Wales. No: 2937881 Registered Office: Serco House, 16 Bartley Wood Business Park, Hook, Hampshire, United Kingdom RG27 9UY --- ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU 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
Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x
As far as I know all of the 4k of RAM is available for use, so you should have about 2.5k for your buffer allocs. Maybe you can put in an allocation size detector for your simulation so you can see where it (is assumed to) overflow? Or log all the alloc/frees and match them up... MS Munaretto, Daniel wrote: Thanks for your answer, in my program i allocate memory to create in each mote a buffer-chain (i use structures that allocate memory dynamically). But i don't know exactly how much dynamic memory i can use in Micaz motes. For example, if after compiling i use 1419 bytes in RAM and 19748 bytes in ROM, is the rest used for dynamic allocation? i don't understand this passage about exactly how much memory i can use dynamically..for me understanding would be really important. Thanks for your availability, Cheers Daniele -Original Message- From: Michael Schippling [mailto:[EMAIL PROTECTED] Sent: Fri 7/28/2006 7:12 PM To: Munaretto, Daniel Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x Well there's 128K of PROM and 4K of RAM in the ATMEGA 128 and I believe it is all available. At the end of the TOS compile you get a line that says how much your program is using. If you are not doing any kind of dynamic allocation this should be the maximum used. Perhaps you have a pointer or something that is running amuck in a way that you don't see in simulation. I think using FLASH is rather slow and the number of MTBF cycles is not conducive to temporary storage. MS Munaretto, Daniel wrote: I did other experiments and i found that, with little data size, the nodes are able to send and receive all packets they generate. So it's definitely a memory problem. But i think not to use so much memory and i free, when i can, the used structures. Remember i need a buffer chain in each node cause i store incoming packets and then i create new coded packets from these buffers. Now my question is: with Micaz motes, tinyos 1.x, how much memory in ROM and RAM can i use? and is it possible to use the FLASH memory?if yes how?and what's the size of it? If possible, i'd like to receive very precise informations for understanding my problem in the best way. Thanks very much for your availability cheers Daniele -Original Message- From: Michael Schippling [mailto:[EMAIL PROTECTED] Sent: Thu 7/27/2006 9:25 PM To: Munaretto, Daniel Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x Sounds like your buffering scheme is overflowing and crashing the mote. One clue is that I seem to see a lot of length 5 buffer pools in TOS... You might want to double check that you are freeing buffers after use. MS Munaretto, Daniel wrote: Hi all, after a lot of simulation in TOSSIM, i uploaded my programs on the motes. By reading the leds, i'm able to understand what happens. If i run on motes a normal flooding, it's all ok. All packets are sent and received. But if i run a more complex program, where before broadcasting packets i code packets i stored in the node's internal buffer, i notice i cannot receive over 5 packets (in my experiments i generate 8 packets per node). But if i run only one mote, it's able to generate all packets. So if i run 2 nodes, one seems blocked or crashed after receiving 5 packets (Leds stop to work, fixed on a color or void) and the other one continue to send packets in a properly way. I made with several motes and it's the same, also changing batteries. Anyone could help me, please? i don't know what's wrong, in TOSSIM was all ok. And i'm using micaz motes, tinyos 1.x, after compiling i see: used RAM=1657 bytes, used ROM=19600 bytes. Thanks very much, i hope someone could answer to me! cheers Daniele ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU 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
[Tinyos-help] Tinyos2.x Mica2 ADC free-running conversion
I'm trying to use the ATM128AdcC component to read multiple ADC channels, one ofter the other. At compile time i get the following errorsIn component `InsoleAppC':InsoleAppC.nc:19: syntax error before `('
InsoleAppC.nc:26: syntax error before `('InsoleAppC.nc:27: syntax error before `('*Here is my File***configuration InsoleAppC { }implementation { components MainC;
components LedsC; components InsoleC; components Atm128AdcC as ADC; components new TimerMilliC() as Timer; components ActiveMessageC as Radio; InsoleC.Boot - MainC;
InsoleC.Leds - LedsC; InsoleC.Timer - Timer; //This may be Timer0 , not sure InsoleC.Multiple - ADC; InsoleC.Resource - ADC; //Atm128AdcSingle was not included, I dont think this is required
InsoleC.Packet - Radio; InsoleC.AMPacket - Radio; InsoleC.AMSend - Radio; InsoleC.SplitControl - Radio;}I'm also having troubles understanding the Atm128AdcMultiple interface.
1 - How do I stop the free running conversion? 2 - To change the channel do I just set *newchannel = channel+1?Thanks.
___
Tinyos-help mailing list
Tinyos-help@Millennium.Berkeley.EDU
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] I2CPacket.writePacket... code example?
Hello, I want to read sensor data from a SRF10 ultrasonic range finder over the I2C bus. Unfortunately I didn't find enough sample code to get it done. I'm also not sure how to define the i2c address that should be used for read and write. Any help greatly appreciated. best regards, Jimmy -- Andreas Jimmy Gredler ,'`. http://www.jimmy.co.at/ | [EMAIL PROTECTED] ( grml.org -» Linux Live-CD for texttool-users and sysadmins `._, http://www.grml.org/| [EMAIL PROTECTED] ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] TOSBase with UART0 instead of UART1
Hi. I am trying to write an application similar to TOSBase for tmote sky so that it uses the UART0 instead of the default UART1. I read the Boomerang UART0 Sample and from what I gathered from there tried the following approach: 1.-Replace the UART component used by TOSBase with a custom made component implementing, of course, the same interfaces as UART to ensure it will wire up properly. 2.-In the new UART implementation (let's call it UART0) make sure to include the resource arbitration as described in UART0 Sample. One important detail here is that since the component should signal an event called txDone once a byte has being sent. I tried to do this by signaling it from another event (also called txDone) fired by HPLUSART0M (which is used by UART0) through an interface called HPLUSARTFeedback, but the problem with this is that the event won't fire up once the byte has being sent. I finally solved this by signaling the event once I have called the release command as done in the example (since at this point the data transfer is done anyways); but I am not sure if I should be signaling the event without having received the txDone previously. Apparently this works fine but I was wandering if this the way to go or there is a better way to achieve this. Thanks for your advice! Carlos ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Maximum datarate on CC1000 radio
Hi all, I am working on packet loss and delay measurements. The fact is i need to do this on multi-hop, for which i need to fix the datarates. It seems that when the application is sending 300 packets/minute, out of which i get around 5.2% loss. The node nearer tothe base station has 0% loss. My network chosen was.. 0 1---2The measurements were done on mica2 mote. Also i observed that as the number of motes increased in the range, losses also increased.. Anyone who know the cause or what might be the dataratefor whichthere will be no loss, please let me know.. Thanking you, venkatesh.S ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Re: [Question] about task in book TinyOS Programming
Dr. Levis: There is some question I still can not understand fully. 2: Second, to prove there exists a call loop, you modify Read.readDone as in pp 32. Herein, it calls Read.read() in Read.readDone(). I agree that in this example call loop occurs. So the modified code in pp 33 post task void readDoneTask() to avoid the call loop. Two problems in this code example: (a) In this example, RawRead.readDone (should it be Read.readDone() ) actually does not call Read.read(). If the answer to 1 is yes, then it seems no improvement by using task. Both have the same effect. The the code example in pp 33 is not suitable to show the benefit of Task. Take a look at the code on page 34. The question is not whether the provider of Read calls Read.read in Read.readDone, but whether the *user* does. Please look at listing 4.12, entitled Signal handler that can lead to an infinite loop. Yes, but in the code example in Listing 4.15( An improved implementation of PeriodicReaderC ), the PeriodicReaderC is the user of Read. It does not call Read.read(). So even we don't use task, call loop will not occur. So it is not suitable to show the benefit of task. (b) If assuming that the code example in 33 posted Read.read() in RawRead.readDone, does task avoid the call loop? As said, task can run atomicly to other tasks. But it is possible that Read.read() preempt to the task. So the call loop still exists? No. Look at the next listing. I know that task can not preempt each other. Then can Read.read(), or other sync commands and events preempt to any task? 3: What is the difference between task and an ordinary function, like task void ProcessData() and void ProcessData(); I am a little bit confused. Thanks. A function executes immediately. A task executes later. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU 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
