Mark Gottscho / SensorsLib

A compilation of some hardware sensors and their shared programming interfaces.

ADCSensor.h@1:15396cab58d1, 2014-03-19 (annotated)

Committer:
mgottscho
Date:
Wed Mar 19 00:35:31 2014 +0000
Revision:
1:15396cab58d1
Parent:
0:8d34cc2ff388 
Updated for most recent UtilityLib.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mgottscho 0:8d34cc2ff388 1 /* ADCSensor.h
mgottscho 0:8d34cc2ff388 2 * Tested with mbed board: FRDM-KL46Z
mgottscho 0:8d34cc2ff388 3 * Author: Mark Gottscho
mgottscho 0:8d34cc2ff388 4 * mgottscho@ucla.edu
mgottscho 0:8d34cc2ff388 5 */
mgottscho 0:8d34cc2ff388 6
mgottscho 0:8d34cc2ff388 7 #ifndef ADCSensor_H
mgottscho 0:8d34cc2ff388 8 #define ADCSensor_H
mgottscho 0:8d34cc2ff388 9
mgottscho 0:8d34cc2ff388 10 #include "mbed.h"
mgottscho 0:8d34cc2ff388 11 #include "PeriodicSensor.h"
mgottscho 0:8d34cc2ff388 12
mgottscho 0:8d34cc2ff388 13 class ADCSensor : public PeriodicSensor {
mgottscho 0:8d34cc2ff388 14 public:
mgottscho 0:8d34cc2ff388 15 /**
mgottscho 0:8d34cc2ff388 16 * Constructs an ADCSensor.
mgottscho 0:8d34cc2ff388 17 * @param adc_pin the ADC pin to use
mgottscho 0:8d34cc2ff388 18 */
mgottscho 0:8d34cc2ff388 19 ADCSensor(PinName adc_pin);
mgottscho 0:8d34cc2ff388 20
mgottscho 0:8d34cc2ff388 21 ~ADCSensor();
mgottscho 0:8d34cc2ff388 22
mgottscho 0:8d34cc2ff388 23 /**
mgottscho 0:8d34cc2ff388 24 * @param sampleNow if true, samples the ADC returns it. if false, gets the last sampled value.
mgottscho 0:8d34cc2ff388 25 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 26 * @returns a raw ADC reading
mgottscho 0:8d34cc2ff388 27 */
mgottscho 0:8d34cc2ff388 28 uint16_t getSample(bool sampleNow);
mgottscho 0:8d34cc2ff388 29
mgottscho 0:8d34cc2ff388 30 /**
mgottscho 0:8d34cc2ff388 31 * @param sampleNow if true, samples the ADC returns it. if false, gets the last sampled value.
mgottscho 0:8d34cc2ff388 32 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 33 * @returns the ADC reading in Volts
mgottscho 0:8d34cc2ff388 34 */
mgottscho 0:8d34cc2ff388 35 float getSampleFloat(bool sampleNow);
mgottscho 0:8d34cc2ff388 36
mgottscho 0:8d34cc2ff388 37 private:
mgottscho 0:8d34cc2ff388 38 /**
mgottscho 0:8d34cc2ff388 39 * Interrupt service routine for sampling the ADC.
mgottscho 0:8d34cc2ff388 40 */
mgottscho 0:8d34cc2ff388 41 virtual void __sample_data_ISR();
mgottscho 0:8d34cc2ff388 42
mgottscho 0:8d34cc2ff388 43 AnalogIn __adc;
mgottscho 0:8d34cc2ff388 44 volatile uint16_t __data;
mgottscho 0:8d34cc2ff388 45
mgottscho 0:8d34cc2ff388 46 const static float ADC_DIV = 0.00005035; //Volts/level
mgottscho 0:8d34cc2ff388 47 };
mgottscho 0:8d34cc2ff388 48
mgottscho 0:8d34cc2ff388 49 #endif