IR Sensor: Does Slow Loop Polling Work.

Technical Programming
1

The IR specs say the IR sensor outputs 100MS pulses. The RC slow loop is ~26ms (unless your code takes longer than 26ms!) which means you should easily be able to catch IR sensor outputs without interrupts. Our quick test a few weeks ago did not catch IR outputs though maybe we did something wrong.

Anyone successfully using standard slow loop polling (ie NOT non-interrupt driven, NOT high speed CPU timer based polling) successfully with the IR Sensor ?

If doesn’t work, do we know why not ? Has anyone actually measured the pulse width ?

2

I’ve done it without problems. You get 3 to 4 hits.
I’ve got some FRC example code here that does everything in Default_Routine().

3

I’ve also gotten the IR sensor to work fine in the slow loop. All I did was just a simple if statement like this


if(rc_dig_in01 == 1)
{
button_pressed = 1;
}