[Tinyos-help] Problems reading a pulse-width signal

[Timothy Hnat]

I am having problem precisely reading in a pulse-width signal on a
telosb node.

This code runs, but I think errors are coming from non-deterministic
execution of events between this and other events in the code.

 async event void pwminput.fired() {
    uint16_t time;
    time = call Counter.get();
    atomic {
      if (edgeState == TRUE) {
        startEdge = time;
        edgeState = FALSE;
      } else {
        endEdge = time;
        local.readings[0] = endEdge-startEdge;
        edgeState = TRUE;
      }
    }
    call pwminput.clear();
    call pwminput.edge(edgeState);
   }

I noticed  that there is a GpioCapture interface as part TinyOS but I
can not figure out how to attach it to an external pin.  Can anyone
offer some suggestions or example code that I can base my system off
of.

Thanks,
Timothy Hnat
h...@cs.virginia.edu
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