fl@c@ Johnson / Mbed 2 deprecated ramanSpectrometer_imagingBoard Featured

This is the device firmware for the imagingBoard on the DIY 3D Printable Raspberry Pi Raman Spectrometer. For more details please visit: http://hackaday.io/project/1279

Dependencies:   mbed

main.cpp@10:f16d2d5bd04d, 2014-09-13 (annotated)

Committer:
flatcat
Date:
Sat Sep 13 11:20:16 2014 +0000
Revision:
10:f16d2d5bd04d
Parent:
9:841663cf312c
Child:
11:1851a9c7ce9c
minor but good;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
flatcat 0:984447b91a04 1 #include "mbed.h"
flatcat 0:984447b91a04 2
flatcat 0:984447b91a04 3 // *** BE SURE TO TEST BEFORE AND AFTER FOR 'IDLING'... CLEAR THE CCD EVERY OTHER FRAME TO TRY AND ELIMINATE NOISE BUILDUP
flatcat 0:984447b91a04 4 //From http://www.ing.iac.es/~docs/ins/das/ins-das-29/integration.html
flatcat 0:984447b91a04 5 //"Idling" vs. integrating
flatcat 0:984447b91a04 6 //Charge from light leaks and thermal noise builds up on the detector between observations. If this charge is integrated by the detector, it may not be completely
flatcat 0:984447b91a04 7 //cleared away by the clear cycle of the next observation. In that case, the observation will be contaminated by extra counts. (Often, this appears as a ramp in the
flatcat 0:984447b91a04 8 //background leading up to a saturated region in the low-numbered rows.)
flatcat 0:984447b91a04 9 //To avoid this problem, the detector is made to clear itself continuously between observations. This is called "idling", and is reported as such on the mimic.
flatcat 0:984447b91a04 10
flatcat 1:a220fd937508 11 PwmOut masterClock(PB_4);
flatcat 0:984447b91a04 12 PwmOut shiftGate(PB_8);
flatcat 1:a220fd937508 13 InterruptIn shiftGate_int(PC_6);
flatcat 1:a220fd937508 14 DigitalOut ICG(PB_3);
flatcat 0:984447b91a04 15 AnalogIn imageIn(A0);
flatcat 1:a220fd937508 16 DigitalOut LED(LED1);
flatcat 10:f16d2d5bd04d 17 DigitalOut illuminator(PA_8);
flatcat 10:f16d2d5bd04d 18 DigitalOut blueLED(PB_5);
flatcat 10:f16d2d5bd04d 19 DigitalOut redLED(PB_10);
flatcat 0:984447b91a04 20 Serial raspi(USBTX, USBRX);
flatcat 0:984447b91a04 21
flatcat 10:f16d2d5bd04d 22 /*
flatcat 10:f16d2d5bd04d 23 int masterFreq_period = 20; //microseconds
flatcat 10:f16d2d5bd04d 24 int masterFreq_width = 10; //microseconds
flatcat 8:5fcd8a2149f0 25 int shiftGate_period = 66; //microseconds
flatcat 8:5fcd8a2149f0 26 int shiftGate_width = 33; //microseconds
flatcat 10:f16d2d5bd04d 27 */
flatcat 10:f16d2d5bd04d 28
flatcat 10:f16d2d5bd04d 29 int masterFreq_period = 2; //microseconds
flatcat 10:f16d2d5bd04d 30 int masterFreq_width = 1; //microseconds
flatcat 10:f16d2d5bd04d 31 int shiftGate_period = 8; //microseconds
flatcat 10:f16d2d5bd04d 32 int shiftGate_width = 4; //microseconds
flatcat 1:a220fd937508 33
flatcat 3:83cb6eb61adf 34 int none = 0;
flatcat 1:a220fd937508 35 int veryLow = 1;
flatcat 1:a220fd937508 36 int low = 100;
flatcat 9:841663cf312c 37 int mediumLow = 1000;
flatcat 1:a220fd937508 38 int medium = 100000;
flatcat 10:f16d2d5bd04d 39 int high = 5000000;
flatcat 1:a220fd937508 40 int veryHigh = 10000000;
flatcat 1:a220fd937508 41
flatcat 2:7751080fb267 42 double imageData;
flatcat 10:f16d2d5bd04d 43 int sensitivity = high;
flatcat 1:a220fd937508 44 int pixelTotal = 3694;
flatcat 1:a220fd937508 45 int leadingDummyElements = 16;
flatcat 1:a220fd937508 46 int leadShieldedElements = 13;
flatcat 1:a220fd937508 47 int headerElements = 3;
flatcat 5:cbf08f942178 48 const int signalElements = 3648;
flatcat 1:a220fd937508 49 int trailingDummyElements = 14;
flatcat 1:a220fd937508 50 int pixelCount;
flatcat 1:a220fd937508 51 int readOutTrigger;
flatcat 1:a220fd937508 52 int state;
flatcat 1:a220fd937508 53
flatcat 1:a220fd937508 54 #define readOut_Begin 1
flatcat 1:a220fd937508 55 #define readOut_ACTIVE 2
flatcat 1:a220fd937508 56 #define readOut_LeadingDummy 3
flatcat 1:a220fd937508 57 #define readOut_LeadingShielded 4
flatcat 1:a220fd937508 58 #define readOut_headerElements 5
flatcat 1:a220fd937508 59 #define readOut_signalElements 6
flatcat 1:a220fd937508 60 #define readOut_trailingDummy 7
flatcat 1:a220fd937508 61 #define readOut_integrationTime 8
flatcat 1:a220fd937508 62 #define readOut_IDLE 9
flatcat 1:a220fd937508 63 #define readOut_Finish 0
flatcat 0:984447b91a04 64
flatcat 0:984447b91a04 65 #define MV(x) ((0xFFF*x)/3300)
flatcat 0:984447b91a04 66
flatcat 6:fe473ca8b625 67 double pixelValue[signalElements] = { 0 };
flatcat 1:a220fd937508 68
flatcat 1:a220fd937508 69 void error()
flatcat 1:a220fd937508 70 {
flatcat 1:a220fd937508 71 while(1) {
flatcat 1:a220fd937508 72 LED = !LED;
flatcat 1:a220fd937508 73 wait(0.5);
flatcat 1:a220fd937508 74 }
flatcat 1:a220fd937508 75 }
flatcat 1:a220fd937508 76
flatcat 1:a220fd937508 77 void checkState()
flatcat 1:a220fd937508 78 {
flatcat 1:a220fd937508 79 if (readOutTrigger == 1) {
flatcat 1:a220fd937508 80 // state = readOut_LeadingDummy;
flatcat 1:a220fd937508 81 }
flatcat 1:a220fd937508 82 switch (state) {
flatcat 1:a220fd937508 83 case readOut_Begin:
flatcat 10:f16d2d5bd04d 84 redLED = 1;
flatcat 10:f16d2d5bd04d 85 blueLED = 0;
flatcat 1:a220fd937508 86 readOutTrigger = 1;
flatcat 1:a220fd937508 87 state = readOut_ACTIVE;
flatcat 6:fe473ca8b625 88 // raspi.printf("+++\r\n");
flatcat 1:a220fd937508 89 LED = 1;
flatcat 1:a220fd937508 90 break;
flatcat 1:a220fd937508 91 case readOut_ACTIVE:
flatcat 1:a220fd937508 92 ICG = 1;
flatcat 1:a220fd937508 93 state = readOut_LeadingDummy;
flatcat 1:a220fd937508 94 break;
flatcat 1:a220fd937508 95 case readOut_LeadingDummy:
flatcat 1:a220fd937508 96 pixelCount++;
flatcat 10:f16d2d5bd04d 97 if (pixelCount == leadingDummyElements - 1) {
flatcat 1:a220fd937508 98 pixelCount = 0;
flatcat 1:a220fd937508 99 state = readOut_LeadingShielded;
flatcat 1:a220fd937508 100 }
flatcat 1:a220fd937508 101 break;
flatcat 1:a220fd937508 102 case readOut_LeadingShielded:
flatcat 1:a220fd937508 103 pixelCount++;
flatcat 10:f16d2d5bd04d 104 if (pixelCount == leadShieldedElements - 1) {
flatcat 1:a220fd937508 105 pixelCount = 0;
flatcat 1:a220fd937508 106 state = readOut_headerElements;
flatcat 1:a220fd937508 107 }
flatcat 1:a220fd937508 108 break;
flatcat 1:a220fd937508 109 case readOut_headerElements:
flatcat 1:a220fd937508 110 pixelCount++;
flatcat 10:f16d2d5bd04d 111 if (pixelCount == headerElements - 1) {
flatcat 1:a220fd937508 112 pixelCount = 0;
flatcat 1:a220fd937508 113 state = readOut_signalElements;
flatcat 1:a220fd937508 114 }
flatcat 1:a220fd937508 115 break;
flatcat 1:a220fd937508 116 case readOut_signalElements:
flatcat 1:a220fd937508 117 pixelCount++;
flatcat 6:fe473ca8b625 118 pixelValue[pixelCount] = imageIn.read_u16();
flatcat 6:fe473ca8b625 119 // raspi.printf("%i\t%4.12f\r\n", pixelCount,(imageIn.read_u16() * 5.0) / 4096.0);
flatcat 10:f16d2d5bd04d 120 if (pixelCount == signalElements - 1) {
flatcat 1:a220fd937508 121 pixelCount = 0;
flatcat 1:a220fd937508 122 state = readOut_trailingDummy;
flatcat 1:a220fd937508 123 }
flatcat 1:a220fd937508 124 break;
flatcat 1:a220fd937508 125 case readOut_trailingDummy:
flatcat 1:a220fd937508 126 pixelCount++;
flatcat 10:f16d2d5bd04d 127 if (pixelCount == trailingDummyElements - 1) {
flatcat 1:a220fd937508 128 pixelCount = 0;
flatcat 1:a220fd937508 129 state = readOut_integrationTime;
flatcat 2:7751080fb267 130 ICG = 0;
flatcat 1:a220fd937508 131 }
flatcat 1:a220fd937508 132 break;
flatcat 1:a220fd937508 133 case readOut_integrationTime:
flatcat 1:a220fd937508 134 wait_us(sensitivity);
flatcat 2:7751080fb267 135 state = readOut_Finish;
flatcat 6:fe473ca8b625 136 for (int pixelNumber=0; pixelNumber<signalElements; pixelNumber++) {
flatcat 10:f16d2d5bd04d 137 raspi.printf("%i\t%4.12f\r\n", pixelNumber, 5 - ((pixelValue[pixelNumber - 1] * 5) / 4096.0));
flatcat 6:fe473ca8b625 138 }
flatcat 6:fe473ca8b625 139 // raspi.printf("---\r\n");
flatcat 1:a220fd937508 140 break;
flatcat 1:a220fd937508 141 case readOut_Finish:
flatcat 10:f16d2d5bd04d 142 redLED = 0;
flatcat 1:a220fd937508 143 state = readOut_IDLE;
flatcat 2:7751080fb267 144 wait_us(sensitivity);
flatcat 1:a220fd937508 145 LED = 0;
flatcat 10:f16d2d5bd04d 146 illuminator = 0;
flatcat 1:a220fd937508 147 ICG = 1;
flatcat 1:a220fd937508 148 break;
flatcat 1:a220fd937508 149 case readOut_IDLE:
flatcat 1:a220fd937508 150 if (ICG == 1) {
flatcat 4:4eedf8292719 151 // ICG = 0;
flatcat 4:4eedf8292719 152 // state = readOut_Begin;
flatcat 10:f16d2d5bd04d 153 blueLED = 1;
flatcat 1:a220fd937508 154 }
flatcat 1:a220fd937508 155 break;
flatcat 1:a220fd937508 156 default:
flatcat 1:a220fd937508 157 break;
flatcat 1:a220fd937508 158 }
flatcat 1:a220fd937508 159 }
flatcat 1:a220fd937508 160
flatcat 0:984447b91a04 161 int main()
flatcat 0:984447b91a04 162 {
flatcat 1:a220fd937508 163 ICG = 1;
flatcat 1:a220fd937508 164 LED = 0;
flatcat 10:f16d2d5bd04d 165 blueLED = 0;
flatcat 10:f16d2d5bd04d 166 redLED = 0;
flatcat 1:a220fd937508 167 pixelCount = 0;
flatcat 1:a220fd937508 168 readOutTrigger = 0;
flatcat 1:a220fd937508 169 state = readOut_IDLE;
flatcat 1:a220fd937508 170
flatcat 0:984447b91a04 171 masterClock.period_us(masterFreq_period);
flatcat 0:984447b91a04 172 masterClock.pulsewidth_us(masterFreq_width);
flatcat 0:984447b91a04 173
flatcat 0:984447b91a04 174 shiftGate.period_us(shiftGate_period);
flatcat 0:984447b91a04 175 shiftGate.pulsewidth_us(shiftGate_width);
flatcat 0:984447b91a04 176
flatcat 2:7751080fb267 177 raspi.baud(921600);
flatcat 1:a220fd937508 178 wait(0.5);
flatcat 1:a220fd937508 179
flatcat 1:a220fd937508 180 shiftGate_int.rise(checkState);
flatcat 1:a220fd937508 181
flatcat 0:984447b91a04 182 raspi.baud(921600);
flatcat 10:f16d2d5bd04d 183 blueLED = 0;
flatcat 0:984447b91a04 184 while(1) {
flatcat 10:f16d2d5bd04d 185 if (state != readOut_IDLE) //reading is top priority
flatcat 10:f16d2d5bd04d 186 {
flatcat 10:f16d2d5bd04d 187 continue;
flatcat 10:f16d2d5bd04d 188 }
flatcat 4:4eedf8292719 189 char c = raspi.getc();
flatcat 6:fe473ca8b625 190 switch (c) {
flatcat 4:4eedf8292719 191 case 'r':
flatcat 10:f16d2d5bd04d 192 illuminator = 1;
flatcat 10:f16d2d5bd04d 193 wait(1);
flatcat 4:4eedf8292719 194 ICG = 0;
flatcat 4:4eedf8292719 195 state = readOut_Begin;
flatcat 4:4eedf8292719 196 break;
flatcat 4:4eedf8292719 197 default:
flatcat 4:4eedf8292719 198 break;
flatcat 4:4eedf8292719 199 }
flatcat 0:984447b91a04 200 }
flatcat 0:984447b91a04 201 }