Ryan Yuyuenyongwatana / Mbed 2 deprecated Capstone

Capstone project files

Dependencies:   mbed-dsp mbed capstone_display_2

main.cpp@8:dcc69fc6d88b, 2014-04-24 (annotated)

Committer:
ryanyuyu
Date:
Thu Apr 24 22:59:51 2014 +0000
Revision:
8:dcc69fc6d88b
Parent:
7:fc55813f823e
Child:
9:4aa641641420
Programmatically adjusting gain thresholds.  (still only 2-gain stages)

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