Ryan Yuyuenyongwatana / Mbed 2 deprecated Capstone

Capstone project files

Dependencies:   mbed-dsp mbed capstone_display_2

main.cpp@10:ab4209a25811, 2014-04-25 (annotated)

Committer:
ryanyuyu
Date:
Fri Apr 25 02:03:04 2014 +0000
Revision:
10:ab4209a25811
Parent:
9:4aa641641420
Child:
11:8c3b4995b05d
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ryanyuyu 0:3aae5d23d0db 1 #include "mbed.h"
ryanyuyu 2:8ae58834937f 2 #include "FIR_f32.h"
ryanyuyu 0:3aae5d23d0db 3 #include "arm_math.h"
ryanyuyu 3:30dcfcf9412c 4 #include "display.h"
ryanyuyu 6:8441a6864784 5 #include "st7735.h"
ryanyuyu 7:fc55813f823e 6 //#include <string>
ryanyuyu 7:fc55813f823e 7 //#include <sstream>
ryanyuyu 2:8ae58834937f 8 #define f_sampling 2000 //the sampling frequency
ryanyuyu 4:9ee3ae61db7f 9 #define NumTaps 27 //the number of filter coefficients
ryanyuyu 4:9ee3ae61db7f 10 #define BlockSize 512 //the size of the buffer
ryanyuyu 9:4aa641641420 11 #define numCallibrationSteps 12 //the number of callibration steps or points
ryanyuyu 9:4aa641641420 12 #define numGainStages 4
ryanyuyu 4:9ee3ae61db7f 13 Serial pc(USBTX, USBRX); //USB serial for PC, to be removed later
ryanyuyu 4:9ee3ae61db7f 14 AnalogOut waveOut(p18); //for debugging
ryanyuyu 4:9ee3ae61db7f 15
ryanyuyu 4:9ee3ae61db7f 16 //-------------------- SPI communication
ryanyuyu 6:8441a6864784 17 SPI spi(p5, p6, p7); //MOSI, MISO, SCLK
ryanyuyu 3:30dcfcf9412c 18 DigitalOut cs(p8);
ryanyuyu 6:8441a6864784 19 DigitalIn button(p21);
ryanyuyu 4:9ee3ae61db7f 20
ryanyuyu 4:9ee3ae61db7f 21 //-------------------- LCD display
ryanyuyu 3:30dcfcf9412c 22 ST7735_LCD disp( p14, p13, p12, p10, p11); //for digital display
ryanyuyu 3:30dcfcf9412c 23 display lcd(&disp);
ryanyuyu 6:8441a6864784 24 char* newString(int length); //prototype for newString
ryanyuyu 7:fc55813f823e 25 char* outputString = newString(64);
ryanyuyu 7:fc55813f823e 26 char* strength = newString(64);
ryanyuyu 7:fc55813f823e 27 char* dist = newString(64);
ryanyuyu 2:8ae58834937f 28
ryanyuyu 4:9ee3ae61db7f 29 //-------------------- signal-related stuff
ryanyuyu 2:8ae58834937f 30 AnalogIn input(p15); //pin 15 for analog reading
ryanyuyu 2:8ae58834937f 31 float32_t waveform[BlockSize]; //array of input data
ryanyuyu 2:8ae58834937f 32 float32_t postFilterData[BlockSize]; //array of filtered data
ryanyuyu 2:8ae58834937f 33 bool fullRead; //whether the MBED has finish
ryanyuyu 2:8ae58834937f 34 bool waitForNext;
ryanyuyu 4:9ee3ae61db7f 35 int index_g; //tracks the index for the waveform array
ryanyuyu 2:8ae58834937f 36
ryanyuyu 6:8441a6864784 37 //-------------------for distance calculation and calibration
ryanyuyu 6:8441a6864784 38 bool adjusting = true; //whether the user is still adjusting the beacon's distance
ryanyuyu 4:9ee3ae61db7f 39 float minThreshold;
ryanyuyu 8:dcc69fc6d88b 40 float maxThresholds[numGainStages];
ryanyuyu 8:dcc69fc6d88b 41 float average = 0;
ryanyuyu 9:4aa641641420 42 float pastAverage1 = 0;
ryanyuyu 9:4aa641641420 43 float pastAverage2 = 0;
ryanyuyu 6:8441a6864784 44 int callibrationStep;
ryanyuyu 6:8441a6864784 45 int state;
ryanyuyu 6:8441a6864784 46 int gainStage;
ryanyuyu 6:8441a6864784 47 float gainMultiplier;
ryanyuyu 9:4aa641641420 48 float gainCutoffs[numGainStages] = {20.0, 100.0, 1200.0, 10000.0};
ryanyuyu 6:8441a6864784 49 //gainCutoffs = {20.0, 100.0, 1200.0, 10000.0};
ryanyuyu 4:9ee3ae61db7f 50 float gain1;
ryanyuyu 6:8441a6864784 51 float gain0;
ryanyuyu 6:8441a6864784 52 //These constants are for linear interpolation for the varius gain stage. Two linear equations per stage (piecewise)
ryanyuyu 6:8441a6864784 53 float linearSamples[numCallibrationSteps];
ryanyuyu 9:4aa641641420 54 int callibrationPoints[numCallibrationSteps] = {6, 10, 14, 14, 20, 24, 26, 36, 50, 50, 62, 78};
ryanyuyu 6:8441a6864784 55 //callibrationPoints = {6, 10, 14, 14, 20, 24, 26, 36, 50, 50, 62, 78};
ryanyuyu 6:8441a6864784 56
ryanyuyu 6:8441a6864784 57 float mLower[numGainStages]; //m (slope) lower portion
ryanyuyu 6:8441a6864784 58 float bLower[numGainStages]; //b (y-offset) lower portion
ryanyuyu 6:8441a6864784 59 float mid[numGainStages]; //the middle x-value for the piecewise
ryanyuyu 6:8441a6864784 60 float mUpper[numGainStages]; //m (slope) upper portion
ryanyuyu 6:8441a6864784 61 float bUpper[numGainStages]; //b (y-offset) upper portion
ryanyuyu 6:8441a6864784 62
ryanyuyu 6:8441a6864784 63 /*
ryanyuyu 6:8441a6864784 64 float m10;
ryanyuyu 6:8441a6864784 65 float b10;
ryanyuyu 6:8441a6864784 66 float mid1;
ryanyuyu 6:8441a6864784 67 float m11;
ryanyuyu 6:8441a6864784 68 float b11;
ryanyuyu 6:8441a6864784 69
ryanyuyu 6:8441a6864784 70 float m20;
ryanyuyu 6:8441a6864784 71 float b20;
ryanyuyu 6:8441a6864784 72 float mid2;
ryanyuyu 6:8441a6864784 73 float m21;
ryanyuyu 6:8441a6864784 74 float b21;
ryanyuyu 6:8441a6864784 75
ryanyuyu 6:8441a6864784 76 float m30;
ryanyuyu 6:8441a6864784 77 float b30;
ryanyuyu 6:8441a6864784 78 float mid3;
ryanyuyu 6:8441a6864784 79 float m31;
ryanyuyu 6:8441a6864784 80 float b31;
ryanyuyu 6:8441a6864784 81 */
ryanyuyu 3:30dcfcf9412c 82
ryanyuyu 4:9ee3ae61db7f 83 //------------------------the filter coefficients for FIR filter
ryanyuyu 2:8ae58834937f 84 float32_t pCoeffs[NumTaps] =
ryanyuyu 2:8ae58834937f 85 { 0.012000000000000, 0.012462263166161, -0.019562318415964, -0.026175892863747,
ryanyuyu 2:8ae58834937f 86 0.031654803781611, 0.050648026372209, -0.032547136829180, -0.070997780956819,
ryanyuyu 2:8ae58834937f 87 0.032992306874347, 0.094643188024724, -0.020568171368385, -0.106071176200193,
ryanyuyu 2:8ae58834937f 88 0.009515198320277, 0.114090808482376, 0.009515198320275, -0.106071176200193,
ryanyuyu 2:8ae58834937f 89 -0.020568171368382, 0.094643188024728, 0.032992306874351, -0.070997780956815,
ryanyuyu 2:8ae58834937f 90 -0.032547136829177, 0.050648026372211, 0.031654803781612, -0.026175892863746,
ryanyuyu 2:8ae58834937f 91 -0.019562318415964, 0.012462263166161, 0.012000000000000 };
ryanyuyu 4:9ee3ae61db7f 92 float32_t pState[NumTaps + BlockSize - 1];
ryanyuyu 3:30dcfcf9412c 93 // */
ryanyuyu 4:9ee3ae61db7f 94
ryanyuyu 4:9ee3ae61db7f 95
ryanyuyu 4:9ee3ae61db7f 96 //-----------------------IIR stuff (if needed)
ryanyuyu 4:9ee3ae61db7f 97 /*
ryanyuyu 4:9ee3ae61db7f 98 float32_t pkCoeffs[NumTaps] =
ryanyuyu 4:9ee3ae61db7f 99 {
ryanyuyu 4:9ee3ae61db7f 100 1,-2.496708288,3.17779085,-2.022333713,0.6561,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
ryanyuyu 4:9ee3ae61db7f 101 };
ryanyuyu 4:9ee3ae61db7f 102
ryanyuyu 4:9ee3ae61db7f 103 float32_t pvCoeffs[NumTaps] =
ryanyuyu 4:9ee3ae61db7f 104 {
ryanyuyu 4:9ee3ae61db7f 105 0.0000556000,0.0002167120,0.0004326320,0.0005056930,0.0002111890,-0.0004911030,-0.0013071920,-0.0017060250,-0.0012444070,0.0000684000,0.0016603140,0.0026622100,0.0024306750,0.0009787140,-0.0009787140,-0.0024306750,-0.0026622100,-0.0016603140,-0.0000684000,0.0012444070,0.0017060250,0.0013071920,0.0004911030,-0.0002111890,-0.0005056930,-0.0004326320,-0.0002167120,-0.0000556000
ryanyuyu 4:9ee3ae61db7f 106 };
ryanyuyu 4:9ee3ae61db7f 107 float32_t pState[NumTaps + BlockSize];
ryanyuyu 4:9ee3ae61db7f 108 //*/
ryanyuyu 4:9ee3ae61db7f 109
ryanyuyu 4:9ee3ae61db7f 110
ryanyuyu 4:9ee3ae61db7f 111 //--------------------------------if needed, the 4kHz FIR filter
ryanyuyu 3:30dcfcf9412c 112 /*
ryanyuyu 3:30dcfcf9412c 113 float32_t pCoeffs[NumTaps] =
ryanyuyu 3:30dcfcf9412c 114 {
ryanyuyu 3:30dcfcf9412c 115 -0.00130297171184699, -0.00456436168827987, -0.00757978930408609, -0.00696944302000657,
ryanyuyu 3:30dcfcf9412c 116 -0.00100059082174453, 0.00812867271498616, 0.0148953048520266, 0.0137935053264369,
ryanyuyu 3:30dcfcf9412c 117 0.00350484996910501, -0.0112195199182290, -0.0216305356563913, -0.0202538386423356,
ryanyuyu 3:30dcfcf9412c 118 -0.00609419278464673, 0.0137348990478646, 0.0275645559768492, 0.0261107576153156,
ryanyuyu 3:30dcfcf9412c 119 0.00866220574766616, -0.0156131009924596, -0.0324957126350438, -0.0311514181527343,
ryanyuyu 3:30dcfcf9412c 120 -0.0110879396617141, 0.0168179120126559, 0.0362758644669149, 0.0352058948414930,
ryanyuyu 3:30dcfcf9412c 121 0.0132978095684398, -0.0172706692984796, -0.0386711719606551, -0.0379507530937637,
ryanyuyu 3:30dcfcf9412c 122 -0.0149419841919419, 0.0172996706397712, 0.0400000000000000, 0.0397279151377323,
ryanyuyu 3:30dcfcf9412c 123 0.0164353142069562, -0.0164055618588934, -0.0396949785867063, -0.0399629114640568,
ryanyuyu 3:30dcfcf9412c 124 -0.0172605211576678, 0.0149790280104299, 0.0379815311949588, 0.0386933807609119,
ryanyuyu 3:30dcfcf9412c 125 0.0172844840085185, -0.0132904115318555, -0.0352024033389307, -0.0362742608690452,
ryanyuyu 3:30dcfcf9412c 126 -0.0168170401765007, 0.0110885383139611, 0.0311518509994083, 0.0324959946809230,
ryanyuyu 3:30dcfcf9412c 127 0.0156132578212073, -0.00866213238945794, -0.0261107291487171, -0.0275645472357883,
ryanyuyu 3:30dcfcf9412c 128 -0.0137348973043660, 0.00609419268963993, 0.0202538383407381, 0.0216305354798053,
ryanyuyu 3:30dcfcf9412c 129 0.0112195198475825, -0.00350484999121515, -0.0137935053321021, -0.0148953048532365,
ryanyuyu 3:30dcfcf9412c 130 -0.00812867271519995, 0.00100059082171422, 0.00696944302000319, 0.00757978930408577,
ryanyuyu 3:30dcfcf9412c 131 0.00456436168827984, 0.00130297171184699
ryanyuyu 3:30dcfcf9412c 132 };
ryanyuyu 3:30dcfcf9412c 133 //*/
ryanyuyu 4:9ee3ae61db7f 134
ryanyuyu 2:8ae58834937f 135
ryanyuyu 2:8ae58834937f 136
ryanyuyu 0:3aae5d23d0db 137
ryanyuyu 6:8441a6864784 138 char* newString(int length) //creates an initialized string of given length
ryanyuyu 6:8441a6864784 139 {
ryanyuyu 6:8441a6864784 140 char* temp = new char[length+1];
ryanyuyu 6:8441a6864784 141 for (int i = 0; i <= length; i++) temp[i] = '\0';
ryanyuyu 6:8441a6864784 142 return temp;
ryanyuyu 6:8441a6864784 143 }
ryanyuyu 6:8441a6864784 144
ryanyuyu 7:fc55813f823e 145 /*
ryanyuyu 7:fc55813f823e 146 std::string convert(float number)
ryanyuyu 7:fc55813f823e 147 {
ryanyuyu 7:fc55813f823e 148 std::ostringstream buffer;
ryanyuyu 7:fc55813f823e 149 buffer<<number;
ryanyuyu 7:fc55813f823e 150 return buffer.str();
ryanyuyu 7:fc55813f823e 151 }
ryanyuyu 7:fc55813f823e 152 */
ryanyuyu 7:fc55813f823e 153
ryanyuyu 2:8ae58834937f 154
ryanyuyu 4:9ee3ae61db7f 155 /*
ryanyuyu 4:9ee3ae61db7f 156 This is a helper function for precision timing of Tickers
ryanyuyu 4:9ee3ae61db7f 157 */
ryanyuyu 2:8ae58834937f 158 void readPoint()
ryanyuyu 2:8ae58834937f 159 {
ryanyuyu 2:8ae58834937f 160 waitForNext = false;
ryanyuyu 2:8ae58834937f 161 }
ryanyuyu 2:8ae58834937f 162
ryanyuyu 2:8ae58834937f 163
ryanyuyu 2:8ae58834937f 164 /**
ryanyuyu 2:8ae58834937f 165 * This function reads one full set of analog data into the uC
ryanyuyu 2:8ae58834937f 166 */
ryanyuyu 2:8ae58834937f 167 void readSamples()
ryanyuyu 2:8ae58834937f 168 {
ryanyuyu 2:8ae58834937f 169 Ticker sampler; //allows for precision data reading
ryanyuyu 2:8ae58834937f 170 waitForNext = true;
ryanyuyu 2:8ae58834937f 171 sampler.attach_us(&readPoint, (int) (1000000/f_sampling) ); //read in data according the sampling freq
ryanyuyu 2:8ae58834937f 172 for (int i = 0; i < BlockSize; i++)
ryanyuyu 2:8ae58834937f 173 {
ryanyuyu 2:8ae58834937f 174 while (waitForNext); //wait until the ticker calls for the next sample
ryanyuyu 2:8ae58834937f 175 waveform[i] = input.read();
ryanyuyu 2:8ae58834937f 176 waitForNext = true;
ryanyuyu 2:8ae58834937f 177 }
ryanyuyu 2:8ae58834937f 178 sampler.detach();
ryanyuyu 2:8ae58834937f 179 }
ryanyuyu 3:30dcfcf9412c 180
ryanyuyu 4:9ee3ae61db7f 181 /**
ryanyuyu 4:9ee3ae61db7f 182 This function spits out the waveform on the analogOut pin (p18)
ryanyuyu 4:9ee3ae61db7f 183 This function will be unused in the final version, but is still usefull for debugging.
ryanyuyu 4:9ee3ae61db7f 184 @param array (float32_t *): (array of data) pointer to the data to output over the analogOut pin
ryanyuyu 4:9ee3ae61db7f 185 @return none
ryanyuyu 4:9ee3ae61db7f 186 */
ryanyuyu 4:9ee3ae61db7f 187 void outputWaveform(float32_t* array)
ryanyuyu 3:30dcfcf9412c 188 {
ryanyuyu 3:30dcfcf9412c 189 Ticker outputter;
ryanyuyu 3:30dcfcf9412c 190 waitForNext = true;
ryanyuyu 3:30dcfcf9412c 191 outputter.attach_us(&readPoint, (int) (1000000/f_sampling) ); //output data according the sampling freq
ryanyuyu 3:30dcfcf9412c 192 for (int i = 0; i < BlockSize; i++)
ryanyuyu 3:30dcfcf9412c 193 {
ryanyuyu 3:30dcfcf9412c 194 while (waitForNext); //wait until the ticker calls for the next data point
ryanyuyu 4:9ee3ae61db7f 195 waveOut.write(array[i]);
ryanyuyu 3:30dcfcf9412c 196 waitForNext = true;
ryanyuyu 3:30dcfcf9412c 197 }
ryanyuyu 3:30dcfcf9412c 198 outputter.detach();
ryanyuyu 3:30dcfcf9412c 199 }
ryanyuyu 3:30dcfcf9412c 200
ryanyuyu 4:9ee3ae61db7f 201 /*
ryanyuyu 4:9ee3ae61db7f 202 This method writes to the digital potentiometer (MCP4251)
ryanyuyu 4:9ee3ae61db7f 203 @param wiperNo (int): this is the wiper number to write to (either 0 or 1)
ryanyuyu 4:9ee3ae61db7f 204 @param kOhms (float): this is the value to set the resistance (in kilo Ohms) between the wiper and terminal B
ryanyuyu 4:9ee3ae61db7f 205 note
ryanyuyu 6:8441a6864784 206 @return: the integer command actually sent (for debugging)
ryanyuyu 4:9ee3ae61db7f 207 */
ryanyuyu 4:9ee3ae61db7f 208 int setPot(int wiperNo, float kOhms)
ryanyuyu 3:30dcfcf9412c 209 {
ryanyuyu 3:30dcfcf9412c 210 //257 steps (8 bits + 1), see section 7.0 for SPI instructions
ryanyuyu 3:30dcfcf9412c 211 float Rmax = 100000;
ryanyuyu 3:30dcfcf9412c 212 spi.frequency(2000000);
ryanyuyu 3:30dcfcf9412c 213 spi.format(16, 0); //16 bits, mode b00
ryanyuyu 3:30dcfcf9412c 214 float ratio = kOhms * 1000.0 / Rmax;
ryanyuyu 3:30dcfcf9412c 215 if (ratio > 1) ratio = 1;
ryanyuyu 3:30dcfcf9412c 216 if (ratio < 0) ratio = 0;
ryanyuyu 3:30dcfcf9412c 217 int dataBits = (int) (ratio * 0x100);
ryanyuyu 3:30dcfcf9412c 218 int command = wiperNo << 12; //setting the Address and Command bits
ryanyuyu 4:9ee3ae61db7f 219 command += dataBits; //add in the data bits (digital settings)
ryanyuyu 3:30dcfcf9412c 220 spi.write(command);
ryanyuyu 3:30dcfcf9412c 221 return command;
ryanyuyu 3:30dcfcf9412c 222 }
ryanyuyu 3:30dcfcf9412c 223
ryanyuyu 6:8441a6864784 224 /**
ryanyuyu 6:8441a6864784 225 This function uses both sides of the digital pot to produce an overall gain for the circuit. It uses side1 (post filter) before side0 (prefilter)
ryanyuyu 6:8441a6864784 226 @param gain (float): the overall gain wanted (bound by [1, 10000] inclusive)
ryanyuyu 6:8441a6864784 227 */
ryanyuyu 6:8441a6864784 228 void setGain(float gain)
ryanyuyu 6:8441a6864784 229 {
ryanyuyu 6:8441a6864784 230 if (gain < 0) return;
ryanyuyu 6:8441a6864784 231 if (gain <= 100.0) //only side1 is used
ryanyuyu 6:8441a6864784 232 {
ryanyuyu 6:8441a6864784 233 setPot(0, 1.0);
ryanyuyu 6:8441a6864784 234 setPot(1, gain);
ryanyuyu 6:8441a6864784 235 }
ryanyuyu 6:8441a6864784 236 else if (gain <= 10000)
ryanyuyu 6:8441a6864784 237 {
ryanyuyu 6:8441a6864784 238 setPot(1, 100.0);
ryanyuyu 6:8441a6864784 239 setPot(0, gain / 100.0);
ryanyuyu 6:8441a6864784 240 }
ryanyuyu 6:8441a6864784 241 else
ryanyuyu 6:8441a6864784 242 {
ryanyuyu 6:8441a6864784 243 setPot(1, 100.0);
ryanyuyu 6:8441a6864784 244 setPot(0, gain / 100.0);
ryanyuyu 6:8441a6864784 245 }
ryanyuyu 6:8441a6864784 246 }
ryanyuyu 6:8441a6864784 247
ryanyuyu 4:9ee3ae61db7f 248 /*
ryanyuyu 4:9ee3ae61db7f 249 This function calculates the RMS (root mean squared) of an array of float data.
ryanyuyu 4:9ee3ae61db7f 250 @param array (float32_t *): the array to calculate RMS from
ryanyuyu 4:9ee3ae61db7f 251 @return float_32: the resulting RMS value of the given array
ryanyuyu 4:9ee3ae61db7f 252 */
ryanyuyu 4:9ee3ae61db7f 253 float32_t rms(float32_t* array)
ryanyuyu 3:30dcfcf9412c 254 {
ryanyuyu 3:30dcfcf9412c 255 float32_t rms = 0;
ryanyuyu 3:30dcfcf9412c 256 for(int i = 0; i < BlockSize; i++)
ryanyuyu 3:30dcfcf9412c 257 {
ryanyuyu 4:9ee3ae61db7f 258 rms += array[i]*array[i];
ryanyuyu 3:30dcfcf9412c 259 }
ryanyuyu 4:9ee3ae61db7f 260 //pc.printf("Sum of squares %f\n\r", rms);
ryanyuyu 3:30dcfcf9412c 261 return sqrt(rms/BlockSize);
ryanyuyu 3:30dcfcf9412c 262 }
ryanyuyu 4:9ee3ae61db7f 263
ryanyuyu 6:8441a6864784 264
ryanyuyu 6:8441a6864784 265 /**
ryanyuyu 6:8441a6864784 266 This function will wait for a button press. It will work 250ms after being called (to reduce double reads)
ryanyuyu 6:8441a6864784 267 */
ryanyuyu 6:8441a6864784 268 void waitForButton()
ryanyuyu 4:9ee3ae61db7f 269 {
ryanyuyu 6:8441a6864784 270 wait_ms(250); //to ward off double reads or sticky buttons
ryanyuyu 6:8441a6864784 271 while(button.read() == 0) wait_ms(10); //poll button press every 10ms
ryanyuyu 6:8441a6864784 272 //char* outputString = newString(32);
ryanyuyu 6:8441a6864784 273 //outputString = "Button pressed.";
ryanyuyu 9:4aa641641420 274 lcd.clearscreen();
ryanyuyu 6:8441a6864784 275 lcd.print("Button pressed.");
ryanyuyu 9:4aa641641420 276 wait_ms(250);
ryanyuyu 9:4aa641641420 277 lcd.clearscreen();
ryanyuyu 6:8441a6864784 278 }
ryanyuyu 6:8441a6864784 279
ryanyuyu 6:8441a6864784 280
ryanyuyu 6:8441a6864784 281 /**
ryanyuyu 6:8441a6864784 282 This function takes RMS voltage and estimates the distance using linear interpolations.
ryanyuyu 6:8441a6864784 283 Each gain stage is split into a 2-piece-wise linear funtion for estimation
ryanyuyu 6:8441a6864784 284 @param value (float): the post-filter RMS value
ryanyuyu 6:8441a6864784 285 @return (float): the distance estimate in inches (6 to 84) assuming perfect alignment, or special:
ryanyuyu 6:8441a6864784 286 Special cases:
ryanyuyu 6:8441a6864784 287 -1: clipping likely, too close adjust to a lower gain stage
ryanyuyu 6:8441a6864784 288 999: cannot detect signal (too far), adjust to higher gain stage
ryanyuyu 6:8441a6864784 289 */
ryanyuyu 6:8441a6864784 290 float estimateDistance(float value)
ryanyuyu 6:8441a6864784 291 {
ryanyuyu 6:8441a6864784 292 //if outside range, then alert to try to adjust the gain settings
ryanyuyu 6:8441a6864784 293 if (value < minThreshold*1.10) return 999;
ryanyuyu 8:dcc69fc6d88b 294 if (value > maxThresholds[gainStage]*.97) return -1;
ryanyuyu 6:8441a6864784 295
ryanyuyu 6:8441a6864784 296 switch (gainStage)
ryanyuyu 6:8441a6864784 297 {
ryanyuyu 6:8441a6864784 298 case 0:
ryanyuyu 6:8441a6864784 299 if (value > mid[0]) return mLower[0]*value + bLower[0];
ryanyuyu 6:8441a6864784 300 else return mUpper[0]*value + bUpper[0];
ryanyuyu 6:8441a6864784 301 case 1:
ryanyuyu 6:8441a6864784 302 if (value > mid[1]) return mLower[1]*value + bLower[1];
ryanyuyu 6:8441a6864784 303 else return mUpper[1]*value + bUpper[1];
ryanyuyu 6:8441a6864784 304 case 2:
ryanyuyu 6:8441a6864784 305 if (value > mid[2]) return mLower[2]*value + bLower[2];
ryanyuyu 6:8441a6864784 306 else return mUpper[2]*value + bUpper[2];
ryanyuyu 6:8441a6864784 307 case 3:
ryanyuyu 6:8441a6864784 308 if (value > mid[3]) return mLower[3]*value + bLower[3];
ryanyuyu 6:8441a6864784 309 else return mUpper[3]*value + bUpper[3];
ryanyuyu 9:4aa641641420 310 //*/
ryanyuyu 6:8441a6864784 311 default:
ryanyuyu 6:8441a6864784 312 return 0;
ryanyuyu 6:8441a6864784 313 }
ryanyuyu 4:9ee3ae61db7f 314 }
ryanyuyu 4:9ee3ae61db7f 315
ryanyuyu 6:8441a6864784 316 /**
ryanyuyu 6:8441a6864784 317 This function takes in a distance estimate and tries to change the gain stage
ryanyuyu 6:8441a6864784 318 @param distance (float): the RMS from estimateDistance
ryanyuyu 6:8441a6864784 319 */
ryanyuyu 6:8441a6864784 320 void adjustGains(float distance)
ryanyuyu 4:9ee3ae61db7f 321 {
ryanyuyu 7:fc55813f823e 322 //pc.printf("GainStage = %d Distance=%f\n\r", gainStage, distance);
ryanyuyu 6:8441a6864784 323 if (distance == -1) //the special case for clipping
ryanyuyu 4:9ee3ae61db7f 324 {
ryanyuyu 7:fc55813f823e 325 //pc.printf(" Too close\n\r");
ryanyuyu 7:fc55813f823e 326 if (gainStage > 0) gainStage--;
ryanyuyu 7:fc55813f823e 327 else lcd.print("Clipping. Back up.");
ryanyuyu 4:9ee3ae61db7f 328 }
ryanyuyu 7:fc55813f823e 329 else if (distance == 999) //the special case for being too far
ryanyuyu 4:9ee3ae61db7f 330 {
ryanyuyu 7:fc55813f823e 331 //pc.printf(" Too far.\n\r");
ryanyuyu 7:fc55813f823e 332 if (gainStage < numGainStages) gainStage++;
ryanyuyu 7:fc55813f823e 333 else lcd.print("No beacon found.");
ryanyuyu 4:9ee3ae61db7f 334 }
ryanyuyu 10:ab4209a25811 335 else lcd.print("");
ryanyuyu 6:8441a6864784 336 setGain( gainCutoffs[gainStage] );
ryanyuyu 6:8441a6864784 337 //return gainStage;
ryanyuyu 4:9ee3ae61db7f 338 }
ryanyuyu 4:9ee3ae61db7f 339
ryanyuyu 6:8441a6864784 340 void enforceGainStage()
ryanyuyu 6:8441a6864784 341 {
ryanyuyu 8:dcc69fc6d88b 342 setGain( gainCutoffs[gainStage] );
ryanyuyu 6:8441a6864784 343 }
ryanyuyu 6:8441a6864784 344
ryanyuyu 6:8441a6864784 345 /**
ryanyuyu 6:8441a6864784 346 This function takes one point of callibration data.
ryanyuyu 6:8441a6864784 347 */
ryanyuyu 6:8441a6864784 348 void callibratePoint(float value)
ryanyuyu 4:9ee3ae61db7f 349 {
ryanyuyu 8:dcc69fc6d88b 350 if (callibrationStep%3 == 1) //this looks for the gain stage thresholds
ryanyuyu 6:8441a6864784 351 {
ryanyuyu 8:dcc69fc6d88b 352 if (adjusting)
ryanyuyu 8:dcc69fc6d88b 353 {
ryanyuyu 8:dcc69fc6d88b 354 //outputString = "Turn off the beacon. Press the button when done.";
ryanyuyu 8:dcc69fc6d88b 355 gainStage = callibrationStep/3;
ryanyuyu 8:dcc69fc6d88b 356 snprintf(outputString, 32, "%i in.", callibrationPoints[ callibrationStep-1 ]);
ryanyuyu 8:dcc69fc6d88b 357 lcd.calibrationdist(outputString);
ryanyuyu 8:dcc69fc6d88b 358 waitForButton();
ryanyuyu 8:dcc69fc6d88b 359 adjusting = false;
ryanyuyu 8:dcc69fc6d88b 360 state = 2;
ryanyuyu 8:dcc69fc6d88b 361 gainMultiplier = .2;
ryanyuyu 8:dcc69fc6d88b 362 gainCutoffs[ gainStage ] *= .2;
ryanyuyu 8:dcc69fc6d88b 363 enforceGainStage();
ryanyuyu 8:dcc69fc6d88b 364 }
ryanyuyu 8:dcc69fc6d88b 365 else
ryanyuyu 8:dcc69fc6d88b 366 {
ryanyuyu 9:4aa641641420 367 //pc.printf("Av=%f gainStage=%d\n\r", gainMultiplier, gainStage);
ryanyuyu 9:4aa641641420 368 if (pastAverage1*1.15 < average || pastAverage1 < minThreshold*3) //not yet maxed, so bump up gainMultiplier
ryanyuyu 8:dcc69fc6d88b 369 {
ryanyuyu 8:dcc69fc6d88b 370 gainMultiplier *= 1.2;
ryanyuyu 8:dcc69fc6d88b 371 gainCutoffs[ gainStage ] *= 1.2;
ryanyuyu 8:dcc69fc6d88b 372 enforceGainStage();
ryanyuyu 9:4aa641641420 373 pastAverage2 = pastAverage1;
ryanyuyu 9:4aa641641420 374 pastAverage1 = average;
ryanyuyu 8:dcc69fc6d88b 375 }
ryanyuyu 8:dcc69fc6d88b 376 else //move onto next callibration step
ryanyuyu 8:dcc69fc6d88b 377 {
ryanyuyu 8:dcc69fc6d88b 378 adjusting = true;
ryanyuyu 9:4aa641641420 379 linearSamples[ callibrationStep-1 ] = pastAverage2; //record the intensity from 2 stages ago
ryanyuyu 9:4aa641641420 380 maxThresholds[ gainStage ] = pastAverage1;
ryanyuyu 9:4aa641641420 381 gainCutoffs[ gainStage ] /= 1.44;
ryanyuyu 8:dcc69fc6d88b 382 enforceGainStage();
ryanyuyu 9:4aa641641420 383 pastAverage1 = minThreshold;
ryanyuyu 9:4aa641641420 384 pastAverage2 = minThreshold;
ryanyuyu 8:dcc69fc6d88b 385 callibrationStep++;
ryanyuyu 8:dcc69fc6d88b 386 }
ryanyuyu 8:dcc69fc6d88b 387 state = 1;
ryanyuyu 8:dcc69fc6d88b 388 }
ryanyuyu 8:dcc69fc6d88b 389 }
ryanyuyu 8:dcc69fc6d88b 390 else //----------regular point-------------------------------
ryanyuyu 8:dcc69fc6d88b 391 {
ryanyuyu 8:dcc69fc6d88b 392 if (adjusting)
ryanyuyu 8:dcc69fc6d88b 393 {
ryanyuyu 8:dcc69fc6d88b 394 gainStage = (callibrationStep) / 3;
ryanyuyu 8:dcc69fc6d88b 395 snprintf(outputString, 32, "%i", callibrationPoints[ callibrationStep-1 ]);
ryanyuyu 8:dcc69fc6d88b 396 lcd.calibrationdist(outputString);
ryanyuyu 8:dcc69fc6d88b 397 waitForButton();
ryanyuyu 8:dcc69fc6d88b 398 adjusting = false;
ryanyuyu 8:dcc69fc6d88b 399 state = 2;
ryanyuyu 8:dcc69fc6d88b 400 }
ryanyuyu 8:dcc69fc6d88b 401 else
ryanyuyu 8:dcc69fc6d88b 402 {
ryanyuyu 8:dcc69fc6d88b 403 enforceGainStage();
ryanyuyu 8:dcc69fc6d88b 404 linearSamples[ callibrationStep - 1] = value;
ryanyuyu 8:dcc69fc6d88b 405 callibrationStep++; //move to next callibration step
ryanyuyu 8:dcc69fc6d88b 406 //get ready for next callibration step
ryanyuyu 8:dcc69fc6d88b 407 adjusting = true;
ryanyuyu 8:dcc69fc6d88b 408 state = 1;
ryanyuyu 8:dcc69fc6d88b 409 }
ryanyuyu 6:8441a6864784 410 }
ryanyuyu 4:9ee3ae61db7f 411 }
ryanyuyu 0:3aae5d23d0db 412
ryanyuyu 0:3aae5d23d0db 413 int main() {
ryanyuyu 4:9ee3ae61db7f 414 //arm_iir_lattice_instance_f32* filter1 = new arm_iir_lattice_instance_f32();
ryanyuyu 4:9ee3ae61db7f 415 arm_fir_instance_f32* filter = new arm_fir_instance_f32();
ryanyuyu 6:8441a6864784 416 float history[10]; //history of RMS voltages.
ryanyuyu 6:8441a6864784 417
ryanyuyu 6:8441a6864784 418 state = 0; //which state of the state machine to be in, change to enum if desired
ryanyuyu 2:8ae58834937f 419
ryanyuyu 2:8ae58834937f 420 uint16_t numTaps = NumTaps;
ryanyuyu 2:8ae58834937f 421 uint32_t blockSize = BlockSize;
ryanyuyu 3:30dcfcf9412c 422 char buffer[32]; //for debugging scanf things
ryanyuyu 6:8441a6864784 423 //char* outputString = newString(30); //string to be printed to the LCD display (or other output)
ryanyuyu 6:8441a6864784 424 //char* strength = newString(32);
ryanyuyu 6:8441a6864784 425 //char* dist = newString(32);
ryanyuyu 3:30dcfcf9412c 426 float32_t estimate = 0;
ryanyuyu 6:8441a6864784 427 float RMS = 0;
ryanyuyu 6:8441a6864784 428 int index_h = 0;
ryanyuyu 2:8ae58834937f 429 while(1)
ryanyuyu 2:8ae58834937f 430 {
ryanyuyu 2:8ae58834937f 431 switch(state)
ryanyuyu 2:8ae58834937f 432 {
ryanyuyu 2:8ae58834937f 433 case 0: //initialization
ryanyuyu 5:bc45ed158abf 434 for (int i = 0; i < NumTaps; i++)
ryanyuyu 5:bc45ed158abf 435 {
ryanyuyu 6:8441a6864784 436 pCoeffs[i] *= 1.70;
ryanyuyu 5:bc45ed158abf 437 }
ryanyuyu 5:bc45ed158abf 438
ryanyuyu 2:8ae58834937f 439 arm_fir_init_f32(filter, numTaps, pCoeffs, pState, blockSize);
ryanyuyu 4:9ee3ae61db7f 440 //arm_iir_lattice_init_f32(filter1, numTaps, pkCoeffs, pvCoeffs, pState, blockSize);
ryanyuyu 2:8ae58834937f 441 //pc.printf("Pre-attachment");
ryanyuyu 3:30dcfcf9412c 442 spi.frequency(1000000);
ryanyuyu 2:8ae58834937f 443 state = 1;
ryanyuyu 6:8441a6864784 444 callibrationStep = 0;
ryanyuyu 6:8441a6864784 445 gainStage = 0;
ryanyuyu 6:8441a6864784 446 gainMultiplier = 1.0;
ryanyuyu 7:fc55813f823e 447 //pc.printf("Done with init.\n\r");
ryanyuyu 2:8ae58834937f 448 break;
ryanyuyu 2:8ae58834937f 449
ryanyuyu 6:8441a6864784 450 case 1: //callibration
ryanyuyu 7:fc55813f823e 451 //pc.printf(" Callibration step: %i\n\r", callibrationStep);
ryanyuyu 6:8441a6864784 452 if (callibrationStep == 0) //calculate the offset (beacon is off, or at infinity)
ryanyuyu 6:8441a6864784 453 {
ryanyuyu 6:8441a6864784 454 setGain( gainCutoffs[0]);
ryanyuyu 6:8441a6864784 455 if (adjusting)
ryanyuyu 6:8441a6864784 456 {
ryanyuyu 6:8441a6864784 457 //outputString = "Turn off the beacon. Press the button when done.";
ryanyuyu 6:8441a6864784 458 lcd.calibrationunl();
ryanyuyu 6:8441a6864784 459 waitForButton();
ryanyuyu 6:8441a6864784 460 adjusting = false;
ryanyuyu 6:8441a6864784 461 state = 2;
ryanyuyu 6:8441a6864784 462 }
ryanyuyu 6:8441a6864784 463 else
ryanyuyu 6:8441a6864784 464 {
ryanyuyu 6:8441a6864784 465
ryanyuyu 6:8441a6864784 466 minThreshold = average; //the average RMS of background noise
ryanyuyu 8:dcc69fc6d88b 467 //maxThreshold = .400;
ryanyuyu 6:8441a6864784 468 callibrationStep = 1; //move to next callibration step
ryanyuyu 6:8441a6864784 469 //get ready for next callibration step
ryanyuyu 6:8441a6864784 470 adjusting = true;
ryanyuyu 6:8441a6864784 471 state = 1;
ryanyuyu 6:8441a6864784 472 }
ryanyuyu 8:dcc69fc6d88b 473 }
ryanyuyu 6:8441a6864784 474 else if (callibrationStep <= numCallibrationSteps)
ryanyuyu 6:8441a6864784 475 {
ryanyuyu 6:8441a6864784 476 callibratePoint(average);
ryanyuyu 6:8441a6864784 477 }
ryanyuyu 6:8441a6864784 478 else //now all the points are captured, so create the coeffs
ryanyuyu 6:8441a6864784 479 {
ryanyuyu 7:fc55813f823e 480 //pc.printf("calculating coeffs\n\r");
ryanyuyu 6:8441a6864784 481 for (int i = 0; i < numGainStages; i++)
ryanyuyu 6:8441a6864784 482 {
ryanyuyu 6:8441a6864784 483 mid[i] = linearSamples[i*3+1];
ryanyuyu 6:8441a6864784 484 mLower[i] = (callibrationPoints[i*3+1] - callibrationPoints[i*3+0]) / (linearSamples[i*3+1] - linearSamples[i*3+0]) ;
ryanyuyu 6:8441a6864784 485 mUpper[i] = (callibrationPoints[i*3+2] - callibrationPoints[i*3+1]) / (linearSamples[i*3+2] - linearSamples[i*3+1]) ;
ryanyuyu 6:8441a6864784 486 bLower[i] = callibrationPoints[i*3+0] - mLower[i]*linearSamples[i*3+0];
ryanyuyu 6:8441a6864784 487 bUpper[i] = callibrationPoints[i*3+1] - mUpper[i]*linearSamples[i*3+1];
ryanyuyu 10:ab4209a25811 488 //pc.printf("mL=%f mU=%f bL=%f, bU=%f, mid=%f, cutoff=%f\n\r", mLower[i], mUpper[i], bLower[i], bUpper[i], mid[i], gainCutoffs[i]);
ryanyuyu 6:8441a6864784 489 }
ryanyuyu 6:8441a6864784 490 callibrationStep = -1;
ryanyuyu 6:8441a6864784 491 state = 2;
ryanyuyu 6:8441a6864784 492 gainStage = 0;
ryanyuyu 6:8441a6864784 493
ryanyuyu 6:8441a6864784 494 for (int i = 0; i < numCallibrationSteps; i++)
ryanyuyu 6:8441a6864784 495 {
ryanyuyu 10:ab4209a25811 496 //pc.printf("linear(x)=%f callibration(y)=%d \n\r", linearSamples[i], callibrationPoints[i]);
ryanyuyu 6:8441a6864784 497 }
ryanyuyu 7:fc55813f823e 498 //pc.printf("End of callibration.\n\r");
ryanyuyu 6:8441a6864784 499 }
ryanyuyu 6:8441a6864784 500
ryanyuyu 6:8441a6864784 501 case 2: //read data, take samples
ryanyuyu 5:bc45ed158abf 502 //pc.printf("Reading data.\n\r");
ryanyuyu 2:8ae58834937f 503 readSamples();
ryanyuyu 3:30dcfcf9412c 504 state = 3;
ryanyuyu 2:8ae58834937f 505 break;
ryanyuyu 2:8ae58834937f 506 case 3: //filter?
ryanyuyu 6:8441a6864784 507 //pc.printf("RMS of waveform = %f\n\r", rms(waveform));
ryanyuyu 6:8441a6864784 508 //pc.printf("Filtering?\n\r");
ryanyuyu 2:8ae58834937f 509 arm_fir_f32(filter, waveform, postFilterData, blockSize);
ryanyuyu 4:9ee3ae61db7f 510 //arm_iir_lattice_f32(filter1, waveform, postFilterData, blockSize);
ryanyuyu 6:8441a6864784 511 RMS = rms(postFilterData);
ryanyuyu 6:8441a6864784 512 estimate = estimateDistance(RMS);
ryanyuyu 6:8441a6864784 513 if (callibrationStep == -1) state = 6; //done with callibration
ryanyuyu 6:8441a6864784 514 else state = 7; //still callibrating
ryanyuyu 2:8ae58834937f 515 break;
ryanyuyu 2:8ae58834937f 516 case 4: //FFT?
ryanyuyu 2:8ae58834937f 517 break;
ryanyuyu 2:8ae58834937f 518 case 5: //output, write to display and PWM tone
ryanyuyu 4:9ee3ae61db7f 519 /*
ryanyuyu 3:30dcfcf9412c 520 sprintf(outputString, "RMS = %f", estimate);
ryanyuyu 3:30dcfcf9412c 521 lcd.print(outputString);
ryanyuyu 3:30dcfcf9412c 522 state = 1;
ryanyuyu 4:9ee3ae61db7f 523 //*/
ryanyuyu 2:8ae58834937f 524 break;
ryanyuyu 4:9ee3ae61db7f 525 case 6: //calculate the average voltage
ryanyuyu 6:8441a6864784 526 //pc.printf("post filter RMS = %f\n\n\r", estimate);
ryanyuyu 4:9ee3ae61db7f 527 adjustGains(estimate);
ryanyuyu 6:8441a6864784 528 state = 8;
ryanyuyu 6:8441a6864784 529 break;
ryanyuyu 6:8441a6864784 530 case 7: //callibration-related, take 10pt average and record it
ryanyuyu 6:8441a6864784 531 history[index_h] = RMS;
ryanyuyu 6:8441a6864784 532 index_h++;
ryanyuyu 6:8441a6864784 533 state = 2;
ryanyuyu 6:8441a6864784 534 if (index_h >= 10) //ten-pt average done
ryanyuyu 6:8441a6864784 535 {
ryanyuyu 6:8441a6864784 536 average = 0;
ryanyuyu 6:8441a6864784 537 for (int i = 0; i < 10; i++) average+= history[i];
ryanyuyu 6:8441a6864784 538 average /= 10;
ryanyuyu 6:8441a6864784 539 //pc.printf("10-pt average of RMS = %f\n\r", average);
ryanyuyu 6:8441a6864784 540 float t = (float) average;
ryanyuyu 7:fc55813f823e 541 int n = snprintf(strength, 32," %f", t);
ryanyuyu 6:8441a6864784 542 lcd.displayStr(strength);
ryanyuyu 6:8441a6864784 543 index_h = 0;
ryanyuyu 6:8441a6864784 544 state = 1; //go back to callibration
ryanyuyu 6:8441a6864784 545 }
ryanyuyu 6:8441a6864784 546 //state is 2, unless 10pts are collected, then state is 1
ryanyuyu 6:8441a6864784 547 //continue taking and filtering data until full of 10pts
ryanyuyu 6:8441a6864784 548 break;
ryanyuyu 6:8441a6864784 549 case 8: //output
ryanyuyu 6:8441a6864784 550 //int n = sprintf(outputString, "RMS = %f, distance = %fin", RMS, estimate);
ryanyuyu 7:fc55813f823e 551 //pc.printf(" RMS=%f, Dist=%f GainStage=%d\n\r", RMS, estimate, gainStage);
ryanyuyu 7:fc55813f823e 552 //strcpy( strength, (convert(RMS) + "\0").c_str() );
ryanyuyu 7:fc55813f823e 553
ryanyuyu 7:fc55813f823e 554
ryanyuyu 7:fc55813f823e 555 //snprintf(strength, 32, " %f\0", RMS);
ryanyuyu 5:bc45ed158abf 556 /*
ryanyuyu 7:fc55813f823e 557 if (estimate == -1) dist = " Unknown (clipping)\0";
ryanyuyu 7:fc55813f823e 558 else if (estimate == 999) dist = " Unknown (no sig)\0";
ryanyuyu 7:fc55813f823e 559 else */
ryanyuyu 7:fc55813f823e 560 //strcpy( dist, (convert(estimate) + "in\0").c_str() );
ryanyuyu 7:fc55813f823e 561 snprintf(strength, 32, " %f\0", RMS);
ryanyuyu 7:fc55813f823e 562 snprintf(dist, 32, " %.1f in.\0", estimate);
ryanyuyu 7:fc55813f823e 563 //*/
ryanyuyu 7:fc55813f823e 564 //pc.printf( strength);
ryanyuyu 7:fc55813f823e 565 //pc.printf( dist);
ryanyuyu 6:8441a6864784 566 lcd.displayStr(strength);
ryanyuyu 6:8441a6864784 567 lcd.displayDist(dist);
ryanyuyu 7:fc55813f823e 568
ryanyuyu 7:fc55813f823e 569 /*
ryanyuyu 6:8441a6864784 570 if (button == 1) state = 9;
ryanyuyu 6:8441a6864784 571 else state = 2;
ryanyuyu 7:fc55813f823e 572 //*/
ryanyuyu 7:fc55813f823e 573 state = 2;
ryanyuyu 7:fc55813f823e 574 //pc.printf(" end of display\n\r");
ryanyuyu 3:30dcfcf9412c 575 break;
ryanyuyu 6:8441a6864784 576 case 9: //digital pot interfacing and calibration
ryanyuyu 6:8441a6864784 577 pc.printf("Gain?\n\r");
ryanyuyu 3:30dcfcf9412c 578 pc.scanf("%s", buffer);
ryanyuyu 3:30dcfcf9412c 579 float value = atof(buffer);
ryanyuyu 6:8441a6864784 580 setGain(value);
ryanyuyu 6:8441a6864784 581 //int side = (int) value;
ryanyuyu 6:8441a6864784 582 //float k = (value - side) * 100;
ryanyuyu 6:8441a6864784 583 //pc.printf("Command: %x Scanned:%d %f\n\r", setPot(side, k), side, k);
ryanyuyu 6:8441a6864784 584 pc.printf("Scanned:%f\n\r", value);
ryanyuyu 6:8441a6864784 585 //lcd.print("Press button to continue.");
ryanyuyu 6:8441a6864784 586 //waitForButton();
ryanyuyu 6:8441a6864784 587 state = 2;
ryanyuyu 4:9ee3ae61db7f 588 break;
ryanyuyu 6:8441a6864784 589 case 10:
ryanyuyu 4:9ee3ae61db7f 590 state = 10;
ryanyuyu 3:30dcfcf9412c 591 break;
ryanyuyu 2:8ae58834937f 592 default:
ryanyuyu 2:8ae58834937f 593 break;
ryanyuyu 2:8ae58834937f 594 }
ryanyuyu 2:8ae58834937f 595 } //end of (infinite) while loop
ryanyuyu 0:3aae5d23d0db 596 }
ryanyuyu 4:9ee3ae61db7f 597
ryanyuyu 4:9ee3ae61db7f 598
ryanyuyu 4:9ee3ae61db7f 599 //-----------------------------Unused code, but potentially useful
ryanyuyu 4:9ee3ae61db7f 600
ryanyuyu 4:9ee3ae61db7f 601 /*
ryanyuyu 4:9ee3ae61db7f 602 double sum = 0;
ryanyuyu 4:9ee3ae61db7f 603 for (int i = 0; i < BlockSize; i++) sum += postFilterData[i];
ryanyuyu 4:9ee3ae61db7f 604 double average = sum/BlockSize*3.3; //*3.3 V_ref (array stored as fractions of V_ref)
ryanyuyu 4:9ee3ae61db7f 605 pc.printf("Average = %f\n\r", average);
ryanyuyu 4:9ee3ae61db7f 606 wait_ms(500);
ryanyuyu 4:9ee3ae61db7f 607 state = 2;
ryanyuyu 4:9ee3ae61db7f 608 */
ryanyuyu 4:9ee3ae61db7f 609
ryanyuyu 4:9ee3ae61db7f 610 //pc.printf("into print\n\r");
ryanyuyu 4:9ee3ae61db7f 611 /*
ryanyuyu 4:9ee3ae61db7f 612 for (int i = 0; i < BlockSize; i++)
ryanyuyu 4:9ee3ae61db7f 613 {
ryanyuyu 4:9ee3ae61db7f 614 pc.printf("Waveform contents:%f\n\r", waveform[i]);
ryanyuyu 4:9ee3ae61db7f 615 }
ryanyuyu 4:9ee3ae61db7f 616 */
ryanyuyu 5:bc45ed158abf 617
ryanyuyu 5:bc45ed158abf 618
ryanyuyu 5:bc45ed158abf 619
ryanyuyu 6:8441a6864784 620 /*---------------peak detection
ryanyuyu 5:bc45ed158abf 621 pc.printf("Into estimation\n\r");
ryanyuyu 5:bc45ed158abf 622 int peaks = 0;
ryanyuyu 5:bc45ed158abf 623 float sum = 0.0;
ryanyuyu 5:bc45ed158abf 624 float prev, current, next;
ryanyuyu 5:bc45ed158abf 625 for (int i = 0+1; i < BlockSize-1; i++)
ryanyuyu 5:bc45ed158abf 626 {
ryanyuyu 5:bc45ed158abf 627 prev = postFilterData[i-1];
ryanyuyu 5:bc45ed158abf 628 current = postFilterData[i];
ryanyuyu 5:bc45ed158abf 629 next = postFilterData[i+1];
ryanyuyu 5:bc45ed158abf 630 if (prev < current && next < current) //local max
ryanyuyu 5:bc45ed158abf 631 {
ryanyuyu 5:bc45ed158abf 632 sum += current;
ryanyuyu 5:bc45ed158abf 633 peaks++;
ryanyuyu 5:bc45ed158abf 634 }
ryanyuyu 5:bc45ed158abf 635 }
ryanyuyu 5:bc45ed158abf 636 float average = sum/peaks;
ryanyuyu 5:bc45ed158abf 637 pc.printf("Average of peaks (scalar) = %f\n\r", average);
ryanyuyu 5:bc45ed158abf 638 state = 1;
ryanyuyu 5:bc45ed158abf 639 //*/
ryanyuyu 6:8441a6864784 640
ryanyuyu 6:8441a6864784 641 /*---------------------------//purely for testing that the digital potentiometer is working.
ryanyuyu 6:8441a6864784 642 pc.printf("Start of digital pot loop.\n\r");
ryanyuyu 6:8441a6864784 643 setPot(1,0);
ryanyuyu 6:8441a6864784 644 wait_ms(1000);
ryanyuyu 6:8441a6864784 645 setPot(1,20);
ryanyuyu 6:8441a6864784 646 wait_ms(1000);
ryanyuyu 6:8441a6864784 647 setPot(1,40);
ryanyuyu 6:8441a6864784 648 wait_ms(1000);
ryanyuyu 6:8441a6864784 649 setPot(1,50);
ryanyuyu 6:8441a6864784 650 wait_ms(1000);
ryanyuyu 6:8441a6864784 651 setPot(1, 80);
ryanyuyu 6:8441a6864784 652 wait_ms(1000);
ryanyuyu 6:8441a6864784 653 setPot(1, 100);
ryanyuyu 6:8441a6864784 654 wait_ms(1000);
ryanyuyu 6:8441a6864784 655 */
ryanyuyu 6:8441a6864784 656
ryanyuyu 6:8441a6864784 657 /*
ryanyuyu 6:8441a6864784 658 m00 = -15.221;
ryanyuyu 6:8441a6864784 659 b00 = 10.836;
ryanyuyu 6:8441a6864784 660 mid0 = .088;
ryanyuyu 6:8441a6864784 661 m01 = -142.2;
ryanyuyu 6:8441a6864784 662 b01 = 22.101;
ryanyuyu 6:8441a6864784 663
ryanyuyu 6:8441a6864784 664 m10 = -48.639;
ryanyuyu 6:8441a6864784 665 b10 = 22.128;
ryanyuyu 6:8441a6864784 666 mid1 = .068;
ryanyuyu 6:8441a6864784 667 m11 = -363.74;
ryanyuyu 6:8441a6864784 668 b11 = 22.352;
ryanyuyu 6:8441a6864784 669
ryanyuyu 6:8441a6864784 670 m20 = -45.513;
ryanyuyu 6:8441a6864784 671 b20 = 39.895;
ryanyuyu 6:8441a6864784 672 mid2 = .115;
ryanyuyu 6:8441a6864784 673 m21 = -314.87;
ryanyuyu 6:8441a6864784 674 b21 = 70.387;
ryanyuyu 6:8441a6864784 675
ryanyuyu 6:8441a6864784 676 m30 = -81.809;
ryanyuyu 6:8441a6864784 677 b30 = 76.868;
ryanyuyu 6:8441a6864784 678 mid3 = .194;
ryanyuyu 6:8441a6864784 679 m31 = -201.48;
ryanyuyu 6:8441a6864784 680 b31 = 99.556;
ryanyuyu 7:fc55813f823e 681
ryanyuyu 7:fc55813f823e 682
ryanyuyu 7:fc55813f823e 683 /*
ryanyuyu 7:fc55813f823e 684 std::string convert(float number)
ryanyuyu 7:fc55813f823e 685 {
ryanyuyu 7:fc55813f823e 686 std::ostringstream buffer;
ryanyuyu 7:fc55813f823e 687 buffer<<number;
ryanyuyu 7:fc55813f823e 688 return buffer.str();
ryanyuyu 7:fc55813f823e 689 }
ryanyuyu 7:fc55813f823e 690
ryanyuyu 7:fc55813f823e 691
ryanyuyu 7:fc55813f823e 692
ryanyuyu 7:fc55813f823e 693
ryanyuyu 8:dcc69fc6d88b 694
ryanyuyu 7:fc55813f823e 695 */