[Tinyos-help] Control the timing of the ADC measurement

[Agnelo Silva]

I am developing a driver for a sensor (MICA2, MDA-100, and
XUbuntu/TinyOS2.x) and I am using the sample code from TestSerial and a
"call Read.read();" as the base for this development.

By default, the behavior of the software is exactly as expected: every 100ms
it gets the environment's light measurement and send it to the serial port.
So, I modified the code to power-up PW4 and read ADC4, where I installed my
sensor.

I am getting the correct readings but there is something that I didn't
understand: taking an oscilloscope (a real one), I verified that PW4 is "on"
for 10ms, with a period of exactly 100ms. I modified the timeout for 200ms
and the period is exactly 200ms with a PW4_ON=10ms again.

I would like to know how can I control this time for activating (10ms) and
deactivating PW4. My sensor needs a specific time "ON" before taking the
measurement. Also, I also need a specific time "ON" after taking the
readings.


Regards,

Agnelo Rocha da Silva
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