[Tinyos-help] Problem with startPeriodicAt() timer

[Mindaugas Jaraminas]

Hello Linas,

I have checked your code and it seems it is a possible bug left in system.
When I comment line 64 in TestPrintfC.nc file timer starts to work properly.

Perhaps someone from TOS developers can confirm it ?

-- 
Best regards
Mindaugas Jaraminas


2009/4/28 Linas Ramanauskas <linraman at gmail.com>:
> Hello,
>
> Here is a demo application where each two seconds timer should fire
> and print time returned by getNow(). To start the timer,
> startPeriodicAt(delay, interval) is called at
> RadioControl.startDone(). If delay is 100ms timer works correctly and
> fires each 2 seconds. If delay is 200ms timer starts to fire without
> any responsibility and fires in a rate of couple ms.
>
>
> Correct result (displayed time is in ms):
>
> Boot.booted() delay = 100, interval = 2048
> RadioControl.startDone() SUCCESS
> 2148
> 4196
> 6244
> 8292
> ...
>
> Incorrect result (displayed time is in ms):
>
> Boot.booted() delay = 200, interval = 2048
> RadioControl.startDone() SUCCESS
> 143
> 149
> 150
> 152
> 158
> 160
> ...
>
>
> If call RoutingControl.start(); is commented in both cases timer works
> correctly. Please, can anyone tell me what is wrong? Is it a bug?
> Source code is below and also attached to this e-mail. Tested with
> TinyOS 2.1.0 released at 2009/02/05 with a TelosB platform.
>
>
> *** File: Makefile ***
>
> COMPONENT=TestPrintfAppC
> CFLAGS += -I$(TOSDIR)/lib/printf
>
> CFLAGS += -I$(TOSDIR)/lib/net \
>          -I$(TOSDIR)/lib/net/le \
>          -I$(TOSDIR)/lib/net/ctp
>
> include $(MAKERULES)
>
>
>
> *** File: TestPrintfAppC.nc ***
>
> #include "printf.h"
>
> configuration TestPrintfAppC{
> }
> implementation {
>  components MainC, TestPrintfC;
>  components new TimerMilliC() as TestTimer;
>
>  TestPrintfC.Boot -> MainC;
>  TestPrintfC.TestTimer -> TestTimer;
>
>  components ActiveMessageC;
>  TestPrintfC.RadioControl -> ActiveMessageC;
>
>  components CollectionC as Collector;
>  TestPrintfC.RoutingControl -> Collector;
>
>  components new CollectionSenderC(1) as CollectionSender;
>  TestPrintfC.CollectionSend -> CollectionSender;
> }
>
>
>
> *** File: TestPrintfC.nc ***
>
> #include "printf.h"
>
> module TestPrintfC (){
>  uses {
>    interface Boot;
>    interface Timer<TMilli> as TestTimer;
>
>    interface SplitControl as RadioControl;
>    interface StdControl as RoutingControl;
>    interface Send as CollectionSend;
>  }
> }
> implementation {
>   uint32_t delay;
>   uint32_t interval;
>
>  event void Boot.booted() {
>    delay = 200;
>    interval = 2048;
>    call RadioControl.start();
>    printf("\nBoot.booted() delay = %lu, interval = %lu\n", delay, interval);
>    printfflush();
>  }
>
>  event void RadioControl.startDone(error_t err) {
>    printf("RadioControl.startDone() ");
>
>    if (err == SUCCESS) {
>      call RoutingControl.start();      // if this is commented timers
> works correctly
>      printf("SUCCESS\n");
>    }
>    else {
>      call RadioControl.start();
>      printf("FAIL\n");
>    }
>
>    printfflush();
>    call TestTimer.startPeriodicAt(delay, interval);
>  }
>
>  event void TestTimer.fired() {
>    printf("%lu\n", call TestTimer.getNow());
>    printfflush();
>  }
>
>  event void RadioControl.stopDone(error_t err) {}
>
>  event void CollectionSend.sendDone(message_t *m, error_t err) {
>    printf("CollectionSend.sendDone()\n");
>    printfflush();
>  }
> }
>
>
> Best regards,
> Linas Ramanauskas
>
> _______________________________________________
> Tinyos-help mailing list
> Tinyos-help at millennium.berkeley.edu
> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>