Re: [Tinyos-help] TelosB and IRIS sensor value calculation
Hallo, Thanks a lot. Now I am just look for the equations to calculate the voltage value of IRIS MTS400 and the sound value for MTS300. Regards, Conny Original-Nachricht Datum: Mon, 23 Apr 2012 15:18:47 +0200 Von: Francesco Ficarola francesco.ficar...@gmail.com An: laptop...@gmx.de CC: tinyos-help@millennium.berkeley.edu Betreff: Re: [Tinyos-help] TelosB and IRIS sensor value calculation Hi, On 04/23/2012 03:04 PM, laptop...@gmx.de wrote: The light sensor now reports a value of 467. But in the datasheets I can not find a conversion formular for international units. The only unit I found is for the temperature value. Look at this: http://www.taosinc.com/ProductDetails.aspx?id=133 Download the following PDF and look at page 11: TSL2550 AMBIENT LIGHT SENSOR WITH SMBus INTERFACE Regards, -- Francesco Ficarola Department of Computer and System Sciences Sapienza, University of Rome Via Ariosto 25, room B112 00185, Rome Phone: (+39) 0677274119 Skype: francesco.ficarola DIS email: ficarola_at_dis.uniroma1_dot_it Nexse email: francesco.ficarola_at_nexse_dot_com Home email: francesco.ficarola_at_gmail_dot_com GPG KeyID: 0xDBA99D92 -- NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone! Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Compute instant energy consumption
Hi all I wonder if there is any TinyOS component or any method to measure the instant energy consumption (or get the average energy consumption periodically) on the nodes in a real fashion (not by means of simulation tools). I am working with Micaz devices and the only idea that comes to my mind is using theoretical values from MicaZ's datasheet. However, this would be just an estimation, and it would take too much time to compute this information. All the help possible would be appreciated. Thanks in advance, David ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Compute instant energy consumption
Hi David, You can measure the voltage level of batteries (using VoltageC component) during a period and then make a figure with the evolution of the voltage level over the time. After if you calculate the mean slope you get the mean slope that means the consumption (but it's the mean consumption and not the instant consumption). Best Regards, Antonio Rosa. 2012/5/9 David Rodenas drod...@hotmail.com Hi all I wonder if there is any TinyOS component or any method to measure the instant energy consumption (or get the average energy consumption periodically) on the nodes in a real fashion (not by means of simulation tools). I am working with Micaz devices and the only idea that comes to my mind is using theoretical values from MicaZ's datasheet. However, this would be just an estimation, and it would take too much time to compute this information. All the help possible would be appreciated. Thanks in advance, David ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] how to measure code execution time
Hi, Where can I find the ISR for each interrupt, e.g., SFD interrupt when a packet is received? Is it part of TinyOS implementation? Thanks. On Wed, Aug 10, 2011 at 11:04 AM, Janos Sallai sal...@isis.vanderbilt.eduwrote: Have you thought of modifying each and every ISR routine to store (and accumulate) the time spent serving interrupts? This accumulated value should then be subtracted from the running time of the code snippet. I suggest that you directly read the counter registers in the ISRs (vs. calling LocalTime.get(), which may have additional overhead). The counter registers should not overflow more than once while the interrupt handler is running. This gets a little tricky, though, if there are nested interrupts. AFAIK it's only the ADC subsystem that uses nested interrupts on the AVR platforms. If your application doesn't use the ADC, the above simple solution would suffice. Janos On Tue, Aug 9, 2011 at 10:27 PM, Xiaohui Liu whu...@gmail.com wrote: Hi everyone, How can I measure the time for a snippet of code (e.g., a function call foo), either synchronous or asynchronous, to execute? A straight forward way can be: start_time = Call LocalTime.get(); foo(); end_time = call LocalTime.get(); (end_time - start_time) is regarded as the execution time of function call foo(). However, asynchronous code can preempt foo() during its execution, thus (end_time - start_time) may be overestimation of foo()'s actual execution time. An alternative can be something like the following: disable interrupt; start_time = Call LocalTime.get(); foo(); end_time = call LocalTime.get(); enable interrupt; However, this can be problematic also if some critical interrupts (e.g., packet reception) occur when the interrupt is disabled. Can anyone have some idea on how execution time can be measured without the above issues? Any help is appreciated. -- -Xiaohui Liu ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help -- -Xiaohui Liu ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Change radio range/ Listen Pin6 ADC
Hi all, I'm starting to use tinyos and telosb platform, I want to change RF power (Or Radio range). My idea as follow : - first, I send a message ( for example : RF power, or Radio range = 1 meter) per second; and at time fired, I will increment +1 a radio range value which I define before. - Second, I want to switch on/off a tranceiver : * Boot: Radio switch-off, * I want to listen/read Pin6 ADC (readADC, interrupt) : How do to read/get a value of this Pin6 ? if Voltage v = 1 V, Radio switch-on. Can you give mes some idea, and what are the component / interface can I use to implement this algorithm two? Thank you for your help. Sitraka ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] interrupt vs event
Hi,
I find something related to TOSH_SIGNAL:
// The signal attribute has opposite meaning in msp430-gcc than in avr-gcc
#define TOSH_SIGNAL(signame) \
void sig_##signame() __attribute__((interrupt (signame), wakeup)) @C()
in msp430hardware.h
TOSH_SIGNAL(NMI_VECTOR)
{
volatile int n = IFG1;
if (n NMIIFG) { signal NMI.fired(); return; }
if (n OFIFG) { signal OF.fired(); return; }
if (FCTL3 ACCVIFG) { signal ACCV.fired(); return; }
}
in HplMsp430InterruptNMIP.nc
But I'm still not sure how the hook from an interrupt works. Can you
explain a little bit? Thanks.
On Sun, Jun 6, 2010 at 8:33 PM, Eric Decker cire...@gmail.com wrote:
okay, let me try.
On Sun, Jun 6, 2010 at 11:05 AM, Xiaohui Liu whu...@gmail.com wrote:
Hi,
Can I say event is at higher level while interrupt is at lower level? I
guess event handler may be sync if you look at Receive.receive() event.
An interrupt handler typically handles a h/w interrupt. In TinyOS you
can find where we hook into the interrupt handlers by looking for
TOSH_SIGNAL.
In TinyOS, modules are interfaced using two mechanisms, commands for call
in, and signals for call out. Signals are wired to event handlers. This
is in the context of TinyOS. Other environments will vary.
Commands and event handlers can be labelled as sync or async. Normally,
one wants to keep everything sync. Life is simpler that way. TinyOS is
about keeping things simple because less goes wrong that way. Its one of
the reasons why static allocation is preferred over dynamic (ie. malloc).
Wild pointers aren't much fun.
However, one clearly needs to be able to signal asynchronous event too.
Like how do we further connect to TinyOS modules from the interrupt
handler? To denote that things can be happening in an asynchronous
fashion, the keyword async word is used.
The toolchain keeps track of the call chain and flags sync labelled
routines that are callable from async routines because it violates the
assumptions that make sync level stuff simple.
Hopefully that adds some clarity.
Can you help me find an example of interrupt handler in TinyOS? Thank you.
Look for TOSH_SIGNAL. That is how code is hooked into the h/w interrupt
handler.
On Sat, Jun 5, 2010 at 3:28 PM, Ali Baharev ali.baha...@gmail.comwrote:
Hi,
a callback subroutine in an operating system or device driver
http://en.wikipedia.org/wiki/Interrupt_handler
When quoting, it helps to quote the whole thing...
An *interrupt handler*, also known as an *interrupt service routine* (*
ISR*), is a
callbackhttp://en.wikipedia.org/wiki/Callback_(computer_science) subroutine
in an operating system http://en.wikipedia.org/wiki/Operating_system or
device
driver http://en.wikipedia.org/wiki/Device_driver whose execution is
triggered by the reception of an
interrupthttp://en.wikipedia.org/wiki/Interrupt.
Interrupt handlers have a multitude of functions, which vary based on the
reason the interrupt was generated and the speed at which the Interrupt
Handler completes its task.
The major difference between an event and an interrupt handler is how the
event is generated. A h/w event is an interrupt and gets hooked in with
TOSH_SIGNAL. An event handler is declared using event void ... and
invoked using signal ...
---
an event handler is an asynchronous callback subroutine that handles
inputs received in a program
http://en.wikipedia.org/wiki/Event_handler
Well that depends. On the context. There are places where that is true.
However, we are talking about TinyOS. So the above confuses things.
Ali
--
-Xiaohui Liu
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Eric B. Decker
Senior (over 50 :-) Researcher
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[Tinyos-help] difference between AMSenderC and ActiveMessageC
Hi, What is the difference between components new AMSenderC(APP_AM_TYPE); App.AMSend - AMSenderC; and components ActiveMessageC; App.AMSend - ActiveMessageC.AMSend[APP_AM_TYPE]; ? Can I still use ActiveMessageC directly when there are multiple communication clients, or AMSenderC abstraction is a must in this case? Thanks in advance. -- -Xiaohui Liu ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
