Thank you steve, what you've said has been really useful.
So to get data from dma is enough doing
call DMA0.repeatTransfer((void*)ADC12MEM0_, (void*)&sbuf1,
NBR_ADC_CHANS);
and returning the sbuf1 value?
2011/5/20 steve ayer <[email protected]>
> hi peppe,
>
> please take a look at the shimmerAnalogSetup interface, and examples of its
> use in tinyos-2.x-contrib/shimmer/apps under accelgyro.
>
> to answer your questions, you may use any approach you like to converting
> analog data. using dma to transfer a/d results to memory has several
> advantages:
>
> 1) it consumes an entire block of code and all of the interrupts that the
> a/d converter generates (one for *each* conversion) in one swoop.
> 2) it's much faster than handling events and doing manual copies of results
> 3) it burns a lot less power by virtue of the fact that the module allows
> the msp430 to continues with other operations while the transfer is underway
> 4) it cleans up your code, and the tinyos task scheduling underneath
> 5) people who have been doing this for a long time have already written the
> tools that allow you to make easy, robust choices about your application's
> data flow; use them with confidence!
>
> i hope that this helps,
>
> steve
>
>
> On 05/20/2011 04:44 AM, Peppe Scabellone wrote:
>
>> Hi everybody,
>> I was trying to use Gyro mod to get data from shimmer2r, but all
>> examples I've seen used Msp430DmaChannel.
>> The question is: Can I use Msp430Adc12MultiChannel, this class is
>> simpler than other because has the method getData() that I need to
>> capture datas from gyro.
>> Using Msp430DmaChannel which advantages do I take?
>> Sincerely Peppe.
>>
>>
>>
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>>
>
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