Xiaohiu:
Please see my answers below.
Janos
On Wed, Dec 5, 2012 at 4:24 PM, Xiaohui Liu <xiao...@wayne.edu> wrote:
> Hi Janos,
>
> (1) SFD capture is disabled during both transmission and reception. Does
> CC2420x timestamping still work if it is enabled?
>
There are some weird edge cases that we want to avoid. For instance, we
might receive a message after we call send() but before we actually issue
the STXON strobe that puts the radio chip into send mode.
I suggest that you don't change that logic unless you understand what
you're doing. Otherwise you risk breaking the whole radio stack, not just
timestamping.
(2) What is *Tasklet* for? If it is used to make code async, then why not
> just use function call directly? That is, to replace *Tasklet.schedule()* with
> what is inside *Tasklet.run() {}*.
>
It's like tasks, but are executed in interrupt context, piggybacking on the
interrupt handler routines. The define TASKLET_IS_TASK=1 replaces them with
regular tasks.
> (3) What is keyword *spi_atomic*?
>
I might just left it in there. It resolves to an empty string. (see #define
spi_atomic in the beginning of the file).
> I'll be truly grateful if you could have me understand these questions.
>
> -Xiaohui
>
> On Tue, Dec 4, 2012 at 2:00 PM, Janos Sallai
> <sal...@isis.vanderbilt.edu>wrote:
>
>> transmission
>
>
>
>
> --
> -Xiaohui Liu
> TelosB
> TinyOS 2.1.2
> www.cs.wayne.edu/xliu/
>
>
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