Jared Baxter / Mbed 2 deprecated Impedance_Fast_Circuitry

Impedance Fast Circuitry Software

Dependencies:   mbed-dsp mbed

Fork of DSP_200kHz by Mazzeo Research Group

main.cpp@86:b3520f4453cf, 2018-06-22 (annotated)

Committer:
baxterja
Date:
Fri Jun 22 18:13:46 2018 +0000
Revision:
86:b3520f4453cf
Parent:
85:f1be018aacac
Child:
87:80c9169acb85
Added Time stamping to the output

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:bb128f0e952f 1 #include "mbed.h"
timmey9 22:523e316cbe70 2
timmey9 52:5a40cc58c4c2 3 // Sampling
bmazzeo 53:83a90a47c1fd 4 #include "DMA_sampling/adc.h"
bmazzeo 54:1697dc574b96 5 #include "DMA_sampling/dac.h"
bmazzeo 55:2526b3317bc8 6 #include "DMA_sampling/pdb.h"
baxterja 73:b059b5bdc664 7 #include "Jareds_DSP/filters_jared.h"
baxterja 75:8bb94685c80b 8 #include "Jareds_DSP/demodulate.h"
bmazzeo 67:ec0c58490ce6 9 // DSP
bmazzeo 67:ec0c58490ce6 10 #include "dsp.h"
baxterja 76:704fc58ffcd0 11 #include "print_data.h"
bmazzeo 67:ec0c58490ce6 12
baxterja 85:f1be018aacac 13 #define PROBE_NUMBER 5
baxterja 85:f1be018aacac 14 #if PROBE_NUMBER == 1
baxterja 85:f1be018aacac 15 #define PRE_COMPUTE_LENGTH 232
baxterja 85:f1be018aacac 16 #elif PROBE_NUMBER == 2
baxterja 85:f1be018aacac 17 #define PRE_COMPUTE_LENGTH 528
baxterja 85:f1be018aacac 18 #elif PROBE_NUMBER == 3
baxterja 85:f1be018aacac 19 #define PRE_COMPUTE_LENGTH 176
baxterja 85:f1be018aacac 20 #elif PROBE_NUMBER == 4
baxterja 85:f1be018aacac 21 #define PRE_COMPUTE_LENGTH 320
baxterja 85:f1be018aacac 22 #elif PROBE_NUMBER == 5
baxterja 85:f1be018aacac 23 #define PRE_COMPUTE_LENGTH 208
baxterja 85:f1be018aacac 24 #elif PROBE_NUMBER == 6
baxterja 85:f1be018aacac 25 #define PRE_COMPUTE_LENGTH 528
baxterja 85:f1be018aacac 26 #endif
baxterja 85:f1be018aacac 27 //#define probe_number 1 //Probe number
baxterja 85:f1be018aacac 28 const int probe_number = PROBE_NUMBER;
baxterja 85:f1be018aacac 29 //const int PCL_LUT[] = {232,528,176,320,208}; //Pre-compute-length for the different probe numbers
baxterja 85:f1be018aacac 30 //190Hz 528
baxterja 85:f1be018aacac 31 //312Hz 320
baxterja 85:f1be018aacac 32 //431Hz 232
baxterja 85:f1be018aacac 33 //481Hz 208
baxterja 85:f1be018aacac 34 //568Hz 176
baxterja 85:f1be018aacac 35
baxterja 72:0b554f5026b9 36 #define PRINT_BUFFER_LENGTH 10000
baxterja 73:b059b5bdc664 37 #define GATHER_STATISTICS 1
bmazzeo 67:ec0c58490ce6 38
baxterja 85:f1be018aacac 39 Serial pc(USBTX, USBRX);
baxterja 74:ebc9f09fda11 40
timmey9 22:523e316cbe70 41 // for debug purposes
timmey9 18:b17ddeeb1c09 42 DigitalOut led_red(LED_RED);
timmey9 18:b17ddeeb1c09 43 DigitalOut led_green(LED_GREEN);
timmey9 18:b17ddeeb1c09 44 DigitalOut led_blue(LED_BLUE);
bmazzeo 58:4bee89daccff 45 DigitalOut status_0(D0);
bmazzeo 58:4bee89daccff 46 DigitalOut status_1(D1);
baxterja 77:1ee17a9e9f8b 47 DigitalOut status_3(D3);
baxterja 85:f1be018aacac 48 DigitalOut Start_sync(D4);// Currently not being used.
baxterja 85:f1be018aacac 49 DigitalIn sw2(SW2);//Button 2 Currently not being used
baxterja 85:f1be018aacac 50 DigitalIn sw3(SW3);//Button 3 Currently not being used
timmey9 51:43143a3fc2d7 51
baxterja 86:b3520f4453cf 52
baxterja 86:b3520f4453cf 53 Timer timer;
baxterja 86:b3520f4453cf 54
timmey9 52:5a40cc58c4c2 55 // defined in dma.cpp
timmey9 45:d591d138cdeb 56 extern int len;
baxterja 73:b059b5bdc664 57 extern uint16_t static_input_array0[];//ADC 0(swaps between a0 and a1. Used to measure current)
baxterja 73:b059b5bdc664 58 extern uint16_t static_input_array1[];//ADC 1(measures the voltage between the probe and ground)
baxterja 73:b059b5bdc664 59 extern uint16_t static_output_array0[];//DAC outputs whatever wave form we want.
baxterja 73:b059b5bdc664 60 extern uint16_t sampling_status;//used to determine when adc's are done reading.
bmazzeo 57:7b8c49e1c1f6 61
baxterja 85:f1be018aacac 62 //#define INPUT_ARRAY_SIZE 32
baxterja 85:f1be018aacac 63 //#define DECIMATION_FACTOR 8
baxterja 85:f1be018aacac 64 //#define DEMODULATED_SIGNAL_LENGTH 64
baxterja 73:b059b5bdc664 65
baxterja 73:b059b5bdc664 66 float *input_50k[8];
baxterja 73:b059b5bdc664 67
baxterja 85:f1be018aacac 68
baxterja 85:f1be018aacac 69
baxterja 73:b059b5bdc664 70
baxterja 73:b059b5bdc664 71
baxterja 84:5b4466dd2326 72 //190Hz 528
baxterja 84:5b4466dd2326 73 //312Hz 320
baxterja 84:5b4466dd2326 74 //431Hz 232
baxterja 84:5b4466dd2326 75 //481Hz 208
baxterja 84:5b4466dd2326 76 //568Hz 176
baxterja 85:f1be018aacac 77 //#define pre_compute_length 208
baxterja 85:f1be018aacac 78 //#define CarrierFrequency (100000/pre_compute_length)
baxterja 85:f1be018aacac 79 const int pre_compute_length = PRE_COMPUTE_LENGTH;
baxterja 85:f1be018aacac 80 const float CarrierFrequency = (100000/pre_compute_length);
baxterja 69:014d4bbd4e03 81 #define SAMPLEFREQUENCY 100000
baxterja 85:f1be018aacac 82
baxterja 73:b059b5bdc664 83 uint16_t out_val_pre[pre_compute_length]; //used to write values to the dac
baxterja 69:014d4bbd4e03 84 float twopi = 3.14159265359 * 2;
baxterja 69:014d4bbd4e03 85
baxterja 69:014d4bbd4e03 86
baxterja 69:014d4bbd4e03 87 void pre_compute_tables() {
baxterja 69:014d4bbd4e03 88 // This function will precompute the cos and sin tables used in the rest of the program
baxterja 69:014d4bbd4e03 89 for(int precompute_counter = 0; precompute_counter < pre_compute_length; precompute_counter++){
baxterja 84:5b4466dd2326 90 out_val_pre[precompute_counter] = (int) ((cos(twopi * CarrierFrequency /SAMPLEFREQUENCY * precompute_counter)) * 2046.0 + 2048.0);//12 bit cos wave
baxterja 69:014d4bbd4e03 91 }
baxterja 73:b059b5bdc664 92
baxterja 73:b059b5bdc664 93
baxterja 69:014d4bbd4e03 94 }
baxterja 69:014d4bbd4e03 95
baxterja 85:f1be018aacac 96
emilmont 7:65188f4a8c25 97 int main() {
baxterja 79:5f24cfd685d8 98
timmey9 22:523e316cbe70 99 led_blue = 1;
timmey9 35:df40c4566826 100 led_green = 1;
timmey9 18:b17ddeeb1c09 101 led_red = 1;
timmey9 34:44cc9b76a507 102
baxterja 79:5f24cfd685d8 103 pre_compute_tables();
baxterja 79:5f24cfd685d8 104 precompute_tables();
baxterja 79:5f24cfd685d8 105 //turn off all LEDs
baxterja 73:b059b5bdc664 106
baxterja 84:5b4466dd2326 107 //slight change.
baxterja 79:5f24cfd685d8 108
baxterja 79:5f24cfd685d8 109
baxterja 73:b059b5bdc664 110
baxterja 73:b059b5bdc664 111 pc.baud(230400);
baxterja 85:f1be018aacac 112 /*
baxterja 79:5f24cfd685d8 113 //pc.printf("High: %x Mid: %x Low: %x",SIM->UIDH,SIM->UIDML,SIM->UIDL);
baxterja 84:5b4466dd2326 114 if(SIM->UIDH == 0x2effff && SIM->UIDML == 0x4e453154 && SIM->UIDL == 0x1004001e) probe_number = 6;
baxterja 80:7a4856c596fc 115 else if(SIM->UIDH == 0x1cffff && SIM->UIDML == 0x4e453215 && SIM->UIDL == 0x700b0003) probe_number = 2;
baxterja 80:7a4856c596fc 116 else if(SIM->UIDH == 0x2effff && SIM->UIDML == 0x4e453215 && SIM->UIDL == 0x700b0021) probe_number = 3;
baxterja 80:7a4856c596fc 117 else if(SIM->UIDH == 0x14ffff && SIM->UIDML == 0x4e453154 && SIM->UIDL == 0x5009002b) probe_number = 4;
baxterja 84:5b4466dd2326 118 else if(SIM->UIDH == 0x12ffff && SIM->UIDML == 0x4e453103 && SIM->UIDL == 0x60010030) probe_number = 1;
baxterja 84:5b4466dd2326 119 else if(SIM->UIDH == 0x10ffff && SIM->UIDML == 0x4e453105 && SIM->UIDL == 0x100b0031) probe_number = 5;
baxterja 80:7a4856c596fc 120 else if(SIM->UIDH == 0x19ffff && SIM->UIDML == 0x4d441504 && SIM->UIDL == 0x90110031) probe_number = 7;//this FRDM board had a bad usb connection
baxterja 80:7a4856c596fc 121 else
baxterja 80:7a4856c596fc 122 {
baxterja 80:7a4856c596fc 123 pc.printf("FRDM BOARD NOT RECOGNIZED. Here is the new ID:\n\r");
baxterja 80:7a4856c596fc 124 pc.printf("High: %x Mid: %x Low: %x\n\r",SIM->UIDH,SIM->UIDML,SIM->UIDL);
baxterja 80:7a4856c596fc 125 probe_number = 6;
baxterja 80:7a4856c596fc 126 }
baxterja 85:f1be018aacac 127 */
baxterja 80:7a4856c596fc 128 pc.printf("PROBE #%d",probe_number);
baxterja 80:7a4856c596fc 129 wait(1.0f);
baxterja 85:f1be018aacac 130
baxterja 79:5f24cfd685d8 131 int DAC_COUNTER = 0;
baxterja 85:f1be018aacac 132
baxterja 78:10b2916b8f5c 133
baxterja 85:f1be018aacac 134 //Filters used in program. Coefficients generated using matlab FDA tool
baxterja 78:10b2916b8f5c 135 //Fs = 100000, FPass = 1500, FStop = 4500, -40db
baxterja 78:10b2916b8f5c 136 float Coeffs_100k[64] = {0.00368762746013400, -0.00390835182721185, -0.00352466159836192, -0.00378044968164769, -0.00434746630849834, -0.00502920744118478, -0.00570543677799210, -0.00628464650365093, -0.00668691824262464, -0.00683917139561193, -0.00667505410229485, -0.00613341508706847, -0.00516232410283893, -0.00371868951723358, -0.00177417571286934, 0.000685809876396031, 0.00365648516386919, 0.00711658039739992, 0.0110234409358280, 0.0153179248880130, 0.0199204447074274, 0.0247385052308702, 0.0296636617979935, 0.0345813441342327, 0.0393672306749833, 0.0438989152744108, 0.0480511039644129, 0.0517108728403463, 0.0547710075854812, 0.0571509837193129, 0.0587848911618005, 0.0596038010741317, 0.0596038010741317, 0.0587848911618005, 0.0571509837193129, 0.0547710075854812, 0.0517108728403463, 0.0480511039644129, 0.0438989152744108, 0.0393672306749833, 0.0345813441342327, 0.0296636617979935, 0.0247385052308702, 0.0199204447074274, 0.0153179248880130, 0.0110234409358280, 0.00711658039739992, 0.00365648516386919, 0.000685809876396031, -0.00177417571286934, -0.00371868951723358, -0.00516232410283893, -0.00613341508706847, -0.00667505410229485, -0.00683917139561193, -0.00668691824262464, -0.00628464650365093, -0.00570543677799210, -0.00502920744118478, -0.00434746630849834, -0.00378044968164769, -0.00352466159836192, -0.00390835182721185, 0.00368762746013400};
baxterja 78:10b2916b8f5c 137 //FS = 12500, Fpass = 100 Fstop 595 -50 db, picks on 1KHz signal
baxterja 78:10b2916b8f5c 138 float Coeffs_12500[64] = {-0.00222124676855946, -0.00163176345559825, -0.00214372257722720, -0.00268653504526241, -0.00323192624665395, -0.00374368158669702, -0.00417907979321931, -0.00449328006488225, -0.00463658803501384, -0.00455550760053878, -0.00419848205106894, -0.00352024663122325, -0.00247317556122392, -0.00102679426345247, 0.000845020041268567, 0.00315252023354445, 0.00589238992243332, 0.00904676286706929, 0.0125796442526745, 0.0164391331165775, 0.0205582919104753, 0.0248562683452381, 0.0292399202971496, 0.0336089813533200, 0.0378556202824368, 0.0418719268554270, 0.0455508704073759, 0.0487915537931733, 0.0515035460002020, 0.0536094934833149, 0.0550483048257919, 0.0557785148825623, 0.0557785148825623, 0.0550483048257919, 0.0536094934833149, 0.0515035460002020, 0.0487915537931733, 0.0455508704073759, 0.0418719268554270, 0.0378556202824368, 0.0336089813533200, 0.0292399202971496, 0.0248562683452381, 0.0205582919104753, 0.0164391331165775, 0.0125796442526745, 0.00904676286706929, 0.00589238992243332, 0.00315252023354445, 0.000845020041268567, -0.00102679426345247, -0.00247317556122392, -0.00352024663122325, -0.00419848205106894, -0.00455550760053878, -0.00463658803501384, -0.00449328006488225, -0.00417907979321931, -0.00374368158669702, -0.00323192624665395, -0.00268653504526241, -0.00214372257722720, -0.00163176345559825, -0.00222124676855946};
baxterja 78:10b2916b8f5c 139 //Fs = 1562.5 Fpass = 100, FStop = 195.6, null at 200 Hz
baxterja 78:10b2916b8f5c 140 float Coeffs_1563[32] = {-0.00296990567211633, 0.00784631357544163, 0.00955642274001412, 0.0105078670942049, 0.00746432577935901, -0.000715888274492355, -0.0127656342089486, -0.0248578255670040, -0.0313597093257934, -0.0264804428976321, -0.00639056527392095, 0.0289495639622991, 0.0749846381319702, 0.123239880157668, 0.163403327438059, 0.186215627611441, 0.186215627611441, 0.163403327438059, 0.123239880157668, 0.0749846381319702, 0.0289495639622991, -0.00639056527392095, -0.0264804428976321, -0.0313597093257934, -0.0248578255670040, -0.0127656342089486, -0.000715888274492355, 0.00746432577935901, 0.0105078670942049, 0.00955642274001412, 0.00784631357544163, -0.00296990567211633};
baxterja 78:10b2916b8f5c 141 //Fs = 781.25, Fpass = 60, Fstop = 120, -50 Db
baxterja 78:10b2916b8f5c 142 float Coeffs_782[32] = {-0.00423132648651131, -0.00413085595827858, -0.00212955364173648, 0.00345345707266939, 0.0105870277845968, 0.0147191914630408, 0.0108878516242339, -0.00283458314983071, -0.0224398052018669, -0.0377493805765767, -0.0358474685211045, -0.00721456868509791, 0.0483564412276129, 0.119338204671425, 0.185468453617916, 0.225354002914126, 0.225354002914126, 0.185468453617916, 0.119338204671425, 0.0483564412276129, -0.00721456868509791, -0.0358474685211045, -0.0377493805765767, -0.0224398052018669, -0.00283458314983071, 0.0108878516242339, 0.0147191914630408, 0.0105870277845968, 0.00345345707266939, -0.00212955364173648, -0.00413085595827858, -0.00423132648651131};
baxterja 76:704fc58ffcd0 143
baxterja 73:b059b5bdc664 144 float Coeffs[20] = {0.0328368433284673, 0.0237706090075265, 0.0309894695180997, 0.0385253568846695, 0.0459996974310349, 0.0530165318016261, 0.0591943866845610, 0.0641755708098907, 0.0676960677594849, 0.0694621149975389, 0.0694621149975389, 0.0676960677594849, 0.0641755708098907, 0.0591943866845610, 0.0530165318016261, 0.0459996974310349, 0.0385253568846695, 0.0309894695180997, 0.0237706090075265, 0.0328368433284673};
baxterja 73:b059b5bdc664 145 float Coeffs2[20] = {-0.00506451294187997, -0.00824932319607346, -0.00986370066237912, -0.00518913235010027, 0.00950858650162284, 0.0357083149022659, 0.0711557142019980, 0.109659494661247, 0.142586101123340, 0.161603335553589, 0.161603335553589, 0.142586101123340, 0.109659494661247, 0.0711557142019980, 0.0357083149022659, 0.00950858650162284, -0.00518913235010027, -0.00986370066237912, -0.00824932319607346, -0.00506451294187997};
baxterja 73:b059b5bdc664 146
baxterja 85:f1be018aacac 147 //note I allocate space for 4 adc inputs, but usually I only use 2
baxterja 73:b059b5bdc664 148 for(int i = 0; i < 8; i++)
baxterja 77:1ee17a9e9f8b 149 input_50k[i] = new float[64];//each array represents the input of the adcs
baxterja 78:10b2916b8f5c 150
baxterja 85:f1be018aacac 151 //filters(const int num_filters, const int DECIMATION, filters * f, const int block_size, const int numTaps, float coeffs[], int demodulate_after)
baxterja 85:f1be018aacac 152 //num filters: usually 4. In-phase and quadrature phase for both voltage and current
baxterja 85:f1be018aacac 153 //DECIMATION: Decimation Factor
baxterja 85:f1be018aacac 154 //f: the filter after current filter.
baxterja 85:f1be018aacac 155 //block_size: block size of each filter command should be an integer multiple of DECIMATION
baxterja 85:f1be018aacac 156 //Flag noting rather or not to demodulate, and if so what frequency to demodulate at
baxterja 78:10b2916b8f5c 157 filters f4 = filters(4, 8, NULL, 8, 32, Coeffs_782,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 158 filters f3 = filters(4, 2, &f4, 4, 32, Coeffs_1563,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 159 filters f2 = filters(4, 8, &f3, 8, 64, Coeffs_12500,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 160 filters f1 = filters(2, 8, &f2, 64, 64, Coeffs_100k,DEMOD_200HZ);
baxterja 73:b059b5bdc664 161
baxterja 84:5b4466dd2326 162 /*
baxterja 78:10b2916b8f5c 163 filters f4_b = filters(4, 8, NULL, 8, 32, Coeffs_782,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 164 filters f3_b = filters(4, 2, &f4_b, 4, 32, Coeffs_1563,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 165 filters f2_b = filters(4, 8, &f3_b, 8, 64, Coeffs_12500,DEMOD_No_Demod);
baxterja 78:10b2916b8f5c 166 filters f1_b = filters(2, 8, &f2_b, 64, 64, Coeffs_100k,DEMOD_1000HZ);
baxterja 84:5b4466dd2326 167 */
baxterja 78:10b2916b8f5c 168 //filters f_pre = filters(2, 2, &f1, 64, 64, Coeffs_50k,false);
baxterja 69:014d4bbd4e03 169
baxterja 73:b059b5bdc664 170 //float output_print_buffer[PRINT_BUFFER_LENGTH];//used to store the adc0 values(current measurment)
baxterja 73:b059b5bdc664 171 //float output_print_buffer2[PRINT_BUFFER_LENGTH];//used to store the adc0 values(voltage measurment)
baxterja 70:8cd7a8a2c153 172 int print_buffer_count = 0;
baxterja 70:8cd7a8a2c153 173
bmazzeo 66:72c5c24e532c 174 pdb_init(); // Initalize PDB
bmazzeo 66:72c5c24e532c 175 dac_init(); // initializes DAC
timmey9 45:d591d138cdeb 176 adc_init(); // always initialize adc before dma
bmazzeo 53:83a90a47c1fd 177 pc.printf("ADC Initialized\r\n");
baxterja 74:ebc9f09fda11 178 dma_init2(); // initializes DMAs
bmazzeo 55:2526b3317bc8 179 dma_reset(); // This clears any DMA triggers that may have gotten things into a different state
bmazzeo 67:ec0c58490ce6 180 pc.printf("Buffer Size: %i\r\n", len);
bmazzeo 54:1697dc574b96 181
timmey9 46:a015ebf4663b 182 led_green = 1;
baxterja 79:5f24cfd685d8 183 pc.printf("High: %x Mid: %x Low: %x",SIM->UIDH,SIM->UIDML,SIM->UIDL);
timmey9 40:bd6d8c35e822 184 pc.printf("\r\n\r\n\r\n");
timmey9 37:8bdc71f3e874 185
bmazzeo 64:bb4a4bd57681 186 pdb_start();
baxterja 84:5b4466dd2326 187 bool is_actively_printing = false;
baxterja 84:5b4466dd2326 188 char read_in_character = 'a';
baxterja 86:b3520f4453cf 189 //while(print_buffer_count<PRINT_BUFFER_LENGTH)
baxterja 86:b3520f4453cf 190 timer.start();
baxterja 73:b059b5bdc664 191 while(!GATHER_STATISTICS||print_buffer_count<PRINT_BUFFER_LENGTH)
baxterja 73:b059b5bdc664 192 {
baxterja 79:5f24cfd685d8 193 if(pc.readable())//if the python code has sent any characters recently
baxterja 79:5f24cfd685d8 194 {
baxterja 85:f1be018aacac 195 while(pc.readable())//if there is a Keyboard input
baxterja 84:5b4466dd2326 196 {
baxterja 85:f1be018aacac 197 if (read_in_character == 'R')//start printing
baxterja 86:b3520f4453cf 198 {
baxterja 86:b3520f4453cf 199 timer.reset();
baxterja 86:b3520f4453cf 200 //timer.start();
baxterja 84:5b4466dd2326 201 is_actively_printing = true;
baxterja 86:b3520f4453cf 202 }
baxterja 85:f1be018aacac 203 else if (read_in_character == 'S')//Stop printing
baxterja 86:b3520f4453cf 204 {
baxterja 86:b3520f4453cf 205 //timer.stop();
baxterja 84:5b4466dd2326 206 is_actively_printing = false;
baxterja 86:b3520f4453cf 207 }
baxterja 85:f1be018aacac 208 else if (read_in_character == 'P')//return probe number
baxterja 84:5b4466dd2326 209 pc.printf("p%d",probe_number);
baxterja 86:b3520f4453cf 210 else if (read_in_character == 'I')//return probe number
baxterja 86:b3520f4453cf 211 pc.printf("IMPEDANCE");
baxterja 84:5b4466dd2326 212 }
baxterja 84:5b4466dd2326 213
baxterja 79:5f24cfd685d8 214 }
baxterja 79:5f24cfd685d8 215
baxterja 85:f1be018aacac 216 while(sampling_status == 0)//wait until the ADCs read a new values
baxterja 73:b059b5bdc664 217 {
baxterja 85:f1be018aacac 218 status_0 = 1; //used for debugging allows to see utilization
baxterja 85:f1be018aacac 219 print_filter_data(&pc,is_actively_printing);//while waiting for new samples print as much data as possible
baxterja 75:8bb94685c80b 220 //Thread::wait(.0001);
baxterja 73:b059b5bdc664 221 }
baxterja 73:b059b5bdc664 222 sampling_status = 0;//sets sampling status to 0. DMA sets it to one once ADCs sample
baxterja 73:b059b5bdc664 223 status_0 = 0;//Tied to D0. use an O-scope to measure how much free time there is to play with.
baxterja 73:b059b5bdc664 224 status_1 = 1;//Tied to D1. use an O-scope to measure how much time the processing takes
baxterja 73:b059b5bdc664 225
baxterja 77:1ee17a9e9f8b 226 for(int i = 0; i < len; i++)
bmazzeo 61:a56cca07d4a6 227 {
baxterja 73:b059b5bdc664 228 static_output_array0[i] = out_val_pre[DAC_COUNTER];//DAC output
baxterja 73:b059b5bdc664 229 DAC_COUNTER++;//Counter to kepp track of where we are in our precomputed table
baxterja 73:b059b5bdc664 230 if (DAC_COUNTER>=pre_compute_length) {DAC_COUNTER = 0;}//wrap around the counter
baxterja 77:1ee17a9e9f8b 231 //static_output_array0[i+1] = out_val_pre[DAC_COUNTER];//DAC output
baxterja 77:1ee17a9e9f8b 232 //DAC_COUNTER++;//Counter to kepp track of where we are in our precomputed table
baxterja 77:1ee17a9e9f8b 233 //if (DAC_COUNTER>=pre_compute_length) {DAC_COUNTER = 0;}//wrap around the counter
baxterja 73:b059b5bdc664 234
baxterja 85:f1be018aacac 235 //Note currently we are sampling 2 adc at 100 KHz. If desired you can also sample 4 ADCs at 50 KHz
baxterja 77:1ee17a9e9f8b 236 input_50k[1][i]=float(static_input_array1[i]);
baxterja 77:1ee17a9e9f8b 237 // input_50k[3][i/2]=static_input_array1[i+1];
baxterja 77:1ee17a9e9f8b 238 input_50k[0][i]=float(static_input_array0[i]);
baxterja 77:1ee17a9e9f8b 239 //input_50k[2][i/2]=static_input_array0[i+1];
baxterja 73:b059b5bdc664 240
baxterja 73:b059b5bdc664 241 }//End of for loop going throught the buffer of adc samples
baxterja 85:f1be018aacac 242
baxterja 85:f1be018aacac 243
baxterja 78:10b2916b8f5c 244 f1.input(input_50k,64,DEMOD_200HZ);
baxterja 84:5b4466dd2326 245 //f1_b.input(input_50k,64,DEMOD_1000HZ);
baxterja 77:1ee17a9e9f8b 246 //status_3 = 1;
baxterja 77:1ee17a9e9f8b 247 //pc.printf("Y");
baxterja 77:1ee17a9e9f8b 248 //status_3 = 0;
baxterja 73:b059b5bdc664 249
baxterja 70:8cd7a8a2c153 250
baxterja 73:b059b5bdc664 251 status_1 = 0;//turn off D1 used in deterimining how long processing is taking
baxterja 85:f1be018aacac 252
baxterja 73:b059b5bdc664 253 }//end of while loop
baxterja 73:b059b5bdc664 254
baxterja 85:f1be018aacac 255 //prints ADC buffer if desired
baxterja 85:f1be018aacac 256
baxterja 73:b059b5bdc664 257 //for(int i = 0; i<PRINT_BUFFER_LENGTH; i++)//print all the adc values measured
baxterja 73:b059b5bdc664 258 //{
baxterja 73:b059b5bdc664 259 // printf("%.1f %.1f\n\r",output_print_buffer[i],output_print_buffer2[i]);
baxterja 73:b059b5bdc664 260 //}
baxterja 73:b059b5bdc664 261
baxterja 70:8cd7a8a2c153 262
bmazzeo 61:a56cca07d4a6 263 }
bmazzeo 63:7903a33e2fd4 264