Alvaro Cassinelli / Mbed 2 deprecated skinGames_forktest

just a test

Dependencies:   mbed

Fork of scoreLight_Advanced by Alvaro Cassinelli

hardwareIO/lockin.h@48:7633d8e7b0d3, 2014-12-02 (annotated)

Committer:
mbedalvaro
Date:
Tue Dec 02 04:28:42 2014 +0000
Revision:
48:7633d8e7b0d3
Parent:
34:1244fa3f2559 
this is the working version of the skin games sowtware (aka, scorelight but with pre-determined "games")

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedalvaro 34:1244fa3f2559 1 #ifndef MBED_LOCKIN_H
mbedalvaro 34:1244fa3f2559 2 #define MBED_LOCKIN_H
mbedalvaro 34:1244fa3f2559 3
mbedalvaro 34:1244fa3f2559 4 #include "mbed.h"
mbedalvaro 34:1244fa3f2559 5 #include "adc.h"
mbedalvaro 34:1244fa3f2559 6
mbedalvaro 34:1244fa3f2559 7 #define MBEDFREQUENCY 96000 //frequency of the mBed in KHz
mbedalvaro 34:1244fa3f2559 8
mbedalvaro 34:1244fa3f2559 9 //#define I_Volts_SAT 5 // this is 5V (the saturation voltage for the APD+LockIn+ADC, being it the arduino (when in normal mode) or the SPI. This saturation voltage could be different for each mode!?
mbedalvaro 34:1244fa3f2559 10
mbedalvaro 34:1244fa3f2559 11 #define LOCKIN_ADC_PIN p18 //ADC pin : connect to lockin "output"
mbedalvaro 34:1244fa3f2559 12
mbedalvaro 34:1244fa3f2559 13 #define LOCKIN_REF_PIN p23 //PWM pin : connect to lockin reference signal.
mbedalvaro 34:1244fa3f2559 14 #define LOCKIN_LASER_PIN p25 //PWM pin : connect to laser control - note: the red laser by default, but could be a fourth IR laser...
mbedalvaro 34:1244fa3f2559 15 // p21 to p26 are used by the PWM timers even if only 2 pin are connected to the circuit
mbedalvaro 34:1244fa3f2559 16
mbedalvaro 34:1244fa3f2559 17 #define BUFFER_SIZE 15
mbedalvaro 34:1244fa3f2559 18 #define BUFFER_SIZE_MEDIAN 5
mbedalvaro 34:1244fa3f2559 19 #define DELAY_BUFFER_MEDIAN 0
mbedalvaro 34:1244fa3f2559 20
mbedalvaro 34:1244fa3f2559 21
mbedalvaro 34:1244fa3f2559 22 class Lockin {
mbedalvaro 34:1244fa3f2559 23 public:
mbedalvaro 34:1244fa3f2559 24 // default constructor (untouched!)
mbedalvaro 34:1244fa3f2559 25 // Lockin();
mbedalvaro 34:1244fa3f2559 26
mbedalvaro 34:1244fa3f2559 27 // initialization of object modes (could have parameters):
mbedalvaro 34:1244fa3f2559 28 void init();
mbedalvaro 34:1244fa3f2559 29
mbedalvaro 34:1244fa3f2559 30 void initPWM(); //setup the laser and reference signal used by the lockin
mbedalvaro 34:1244fa3f2559 31 void setPWMFrequency(float freq); //change the shared period of the pwm signals
mbedalvaro 34:1244fa3f2559 32 void setLaserPhaseShift(float phaseShift); //change the phase shift of the laser (from 0 to 1)
mbedalvaro 34:1244fa3f2559 33 void setLockinPhaseShift(float phaseShift); //change the phase shift of the lock-in (from 0 to 1)
mbedalvaro 34:1244fa3f2559 34 //future works:
mbedalvaro 34:1244fa3f2559 35 //add function to change frequency or offset with a potentiometer for exemple
mbedalvaro 34:1244fa3f2559 36 //or scan the best frequency...
mbedalvaro 34:1244fa3f2559 37
mbedalvaro 34:1244fa3f2559 38 void setLaserPower(bool power); //change PWM settings to turn on/off the laser
mbedalvaro 34:1244fa3f2559 39
mbedalvaro 34:1244fa3f2559 40 void setADC_forLockin(int mode); //1 set, 0 reset
mbedalvaro 34:1244fa3f2559 41
mbedalvaro 34:1244fa3f2559 42 unsigned short getSmoothValue(); //return the average of the value stored on the buffer
mbedalvaro 34:1244fa3f2559 43 unsigned short getLastValue(); //return the last conversion of the ADC
mbedalvaro 34:1244fa3f2559 44 unsigned short getMedianValue(); //return the median value of the buffer
mbedalvaro 34:1244fa3f2559 45 //it is just a begining; we can add more complex method for denoising for exemple
mbedalvaro 34:1244fa3f2559 46 //maybe, needs function to start and stop the lockin
mbedalvaro 34:1244fa3f2559 47
mbedalvaro 34:1244fa3f2559 48 void clearBuffer();
mbedalvaro 34:1244fa3f2559 49
mbedalvaro 34:1244fa3f2559 50 //can be private
mbedalvaro 34:1244fa3f2559 51 //void catchInterupt(uint32_t value);
mbedalvaro 34:1244fa3f2559 52
mbedalvaro 34:1244fa3f2559 53 //variables
mbedalvaro 34:1244fa3f2559 54 unsigned short buffer[BUFFER_SIZE]; // does not need to be a float - in fact values are from 0 to 4096 (i.e.,
mbedalvaro 34:1244fa3f2559 55 //unsigned short int buffer[BUFFER_SIZE]; // this is two bytes (0 to 65535)
mbedalvaro 34:1244fa3f2559 56 unsigned short orderedBuffer[BUFFER_SIZE_MEDIAN]; // for computation of the MEDIAN value
mbedalvaro 34:1244fa3f2559 57 int buffer_pos;
mbedalvaro 34:1244fa3f2559 58
mbedalvaro 34:1244fa3f2559 59 float refFrequency; // frequency of sensing laser and lock-in (in KHz)
mbedalvaro 34:1244fa3f2559 60 //Phase shift of the pwm signals (from 0 to 1):
mbedalvaro 34:1244fa3f2559 61 //it corresponds to a percentage of the half of a period
mbedalvaro 34:1244fa3f2559 62 //(no phase shift ==> 0% / 90deg phase shift ==> 100%)
mbedalvaro 34:1244fa3f2559 63 float phaseShiftLaser; // phase shift of the sensing laser
mbedalvaro 34:1244fa3f2559 64 float phaseShiftLockin; // phase shift of the lock-in reference
mbedalvaro 34:1244fa3f2559 65
mbedalvaro 34:1244fa3f2559 66 int refFreq; //frequency of the lockin
mbedalvaro 34:1244fa3f2559 67 int offsetRef; //offset between the laser signal and the lockin reference signal
mbedalvaro 34:1244fa3f2559 68 int halfRefFreq;
mbedalvaro 34:1244fa3f2559 69
mbedalvaro 34:1244fa3f2559 70 private:
mbedalvaro 34:1244fa3f2559 71 // PWM match register value are saved as private
mbedalvaro 34:1244fa3f2559 72 // to avoid computation when turn on/off for exemple
mbedalvaro 34:1244fa3f2559 73 int _currentMR[6];
mbedalvaro 34:1244fa3f2559 74
mbedalvaro 34:1244fa3f2559 75
mbedalvaro 34:1244fa3f2559 76 };
mbedalvaro 34:1244fa3f2559 77
mbedalvaro 34:1244fa3f2559 78 extern Lockin lockin;
mbedalvaro 34:1244fa3f2559 79
mbedalvaro 31:5f039cbddee8 80 #endif