[Tinyos-help] ReadStream period off on a telosb?

[Michiel Konstapel]

In C, integer constants are of type int, which on the MSP is 16 bits. I.e., you're actually sampling every (1000000 & 0xFFFF) clock ticks (are those microseconds?). To specify a long integer (32 bit) constant, add an L to the number. You can also add a U to make it unsigned: read(1000000UL) should do the trick.

HTH,
Michiel

-----Original Message-----
From: tinyos-help-bounces at millennium.berkeley.edu on behalf of Sivan Toledo
Sent: Tue 3/4/2008 9:07 PM
To: TinyOS Help Mailing List
Subject: [Tinyos-help] ReadStream period off on a telosb?
 
I am trying to read from the TelosB ADC using the ReadStream interface
(wired to AdcReadStreamClientC), and it seems that when I set a large
period, for sanity checking, the actual sampling period is much
smaller. For example, if I call read(1000000) when the posted buffers
are of size 8, I get several buffers per second back, rather than 1
every 8 seconds.

Any idea why this is happening?

Thanks, Sivan
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