giuliomoro@193: /*
giuliomoro@193: * PulseIn.cpp
giuliomoro@193: *
giuliomoro@193: *  Created on: 4 Feb 2016
giuliomoro@193: *      Author: giulio
giuliomoro@193: */
giuliomoro@193: 
giuliomoro@193: #include "../include/PulseIn.h"
giuliomoro@193: 
giuliomoro@301: void PulseIn::init(BelaContext* context, unsigned int digitalInput, int direction){
giuliomoro@193: 	_digitalInput = digitalInput;
giuliomoro@193: 	_pulseIsOn = false;
giuliomoro@193: 	_pulseOnState = direction == 1 ? 1 : 0;
giuliomoro@193: 	_array.resize(context->digitalFrames);
giuliomoro@193: 	_lastContext = (uint64_t)-1;
giuliomoro@193: 	pinModeFrame(context, 0, digitalInput, INPUT); //context is used to allocate the number of elements in the array
giuliomoro@193: }
giuliomoro@193: 
giuliomoro@301: void PulseIn::check(BelaContext* context){
giuliomoro@193: 	if(_digitalInput == -1){ //must be init'ed before calling check();
giuliomoro@193: 		throw(1);
giuliomoro@193: 	}
giuliomoro@193: 	for(unsigned int n = 0; n < context->digitalFrames; n++){
giuliomoro@193: 		_array[n] = 0; //maybe a few of these will be overwritten below
giuliomoro@193: 	}
giuliomoro@193: 	for(unsigned int n = 0; n < context->digitalFrames; n++){
giuliomoro@193: 		if(_pulseIsOn == false){ // look for start edge
andrewm@308: 			if(digitalRead(context, n, _digitalInput) == _pulseOnState){
giuliomoro@193: 				_pulseStart = context->audioSampleCount + n; // store location of start edge
giuliomoro@193: 				_pulseIsOn = true;
giuliomoro@193: 			}
giuliomoro@193: 		} else { // _pulseIsOn == true;
andrewm@308: 			if(digitalRead(context, n, _digitalInput) == !_pulseOnState){ // look for stop edge
giuliomoro@193: 				_array[n] = context->audioSampleCount + n - _pulseStart; // compute and store pulse duration
giuliomoro@193: 				_pulseIsOn = false;
giuliomoro@193: 			}
giuliomoro@193: 		}
giuliomoro@193: 	}
giuliomoro@193: 	_lastContext = context->audioSampleCount;
giuliomoro@193: };
giuliomoro@193: 
giuliomoro@193: PulseIn::~PulseIn() {
giuliomoro@193: // TODO Auto-generated destructor stub
giuliomoro@193: }
giuliomoro@193: