It means the least significant bit is 1 (I hope u know the binary
representations of 1, 2 and 4 are 001, 010 and 100 respectively). So value
&2 means the second least significant bit is 1, value &4 means the third
least significant bit is 1...so on...
On 4/4/07, Vasudha K <[EMAIL PROTECTED]> wrote:
Hi all,
I m a Newbie working on telosb motes of Crossbow. Using TinyOS1.x
I am working on a task how to detect the light sensor and a code from
apps/sense. Here is the code, I cannot understand the meaning of the
statement
if (value &1) call Leds.yellowOn();
result_t display(uint16_t value)
{
if (value &1) call Leds.yellowOn();
else call Leds.yellowOff();
if (value &2) call Leds.greenOn();
else call Leds.greenOff();
if (value &4) call Leds.redOn();
else call Leds.redOff();
return SUCCESS;
}
Please help me out.
Thanks
Vasudha
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