Naved Maududi / Mbed 2 deprecated DebugMonitor_revised

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Dependencies:   mbed

frequency_detector.cpp@2:64a34ae90bb1, 2019-10-05 (annotated)

Committer:
nmaududi
Date:
Sat Oct 05 21:17:17 2019 +0000
Revision:
2:64a34ae90bb1
Parent:
1:9fa7cc80f1a7 
revised version for module 4;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nmaududi 0:4fb921928934 1 /**----------------------------------------------------------------------------
nmaududi 0:4fb921928934 2 *
nmaududi 0:4fb921928934 3 * \file frequency_detector.cpp
nmaududi 0:4fb921928934 4 -- --
nmaududi 0:4fb921928934 5 -- ECEN 5803 Mastering Embedded System Architecture --
nmaududi 0:4fb921928934 6 -- Project 1 Module 4 --
nmaududi 0:4fb921928934 7 -- Microcontroller Firmware --
nmaududi 0:4fb921928934 8 -- frequency_detector.cpp --
nmaududi 0:4fb921928934 9 -- --
nmaududi 0:4fb921928934 10 -------------------------------------------------------------------------------
nmaududi 0:4fb921928934 11 --
nmaududi 0:4fb921928934 12 -- Designed for: University of Colorado at Boulder
nmaududi 0:4fb921928934 13 --
nmaududi 0:4fb921928934 14 --
nmaududi 0:4fb921928934 15 -- Designed by: Tim Scherr
nmaududi 0:4fb921928934 16 -- Revised by: Naved Maududi and Bryan Cisneros
nmaududi 0:4fb921928934 17 --
nmaududi 0:4fb921928934 18 -- Version: 2.1
nmaududi 0:4fb921928934 19 -- Date of current revision: 2017-09-25
nmaududi 0:4fb921928934 20 -- Target Microcontroller: Freescale MKL25ZVMT4
nmaududi 0:4fb921928934 21 -- Tools used: ARM mbed compiler
nmaududi 0:4fb921928934 22 -- ARM mbed SDK
nmaududi 0:4fb921928934 23 -- Freescale FRDM-KL25Z Freedom Board
nmaududi 0:4fb921928934 24 --
nmaududi 0:4fb921928934 25 --
nmaududi 0:4fb921928934 26 Functional Description:
nmaududi 0:4fb921928934 27 This file contains code that takes in quasi-sine wave ADC inputs from the flow meter
nmaududi 0:4fb921928934 28 From the ADC inputs, it calculates the frequency of that sine wave. The frequency is
nmaududi 0:4fb921928934 29 important in determining the flow rate and velocity for the flowmeter that are outputed
nmaududi 0:4fb921928934 30 to the display.
nmaududi 0:4fb921928934 31 --
nmaududi 0:4fb921928934 32 -- Copyright (c) 2015 Tim Scherr All rights reserved.
nmaududi 0:4fb921928934 33 */
nmaududi 0:4fb921928934 34
nmaududi 0:4fb921928934 35
nmaududi 0:4fb921928934 36 #include "shared.h"
nmaududi 0:4fb921928934 37
nmaududi 2:64a34ae90bb1 38
nmaududi 0:4fb921928934 39 #ifdef __cplusplus
nmaududi 0:4fb921928934 40 extern "C" {
nmaududi 0:4fb921928934 41 #endif
nmaududi 0:4fb921928934 42 /**********************/
nmaududi 0:4fb921928934 43 /* Definitions */
nmaududi 0:4fb921928934 44 /**********************/
nmaududi 0:4fb921928934 45
nmaududi 2:64a34ae90bb1 46 extern double zero_detect_counter = 0; // initialize the value to zero
nmaududi 2:64a34ae90bb1 47 extern double sample_count =0; // intialize sample count to zero
nmaududi 2:64a34ae90bb1 48 extern double frequency_buffer[10] = {0,0,0,0,0,0,0,0,0,0};
nmaududi 2:64a34ae90bb1 49 //extern double test_value = 0;
nmaududi 0:4fb921928934 50 extern UCHAR frequency_buffer_count = 0;
nmaududi 0:4fb921928934 51 extern UCHAR reset_counter_flag = 0;
nmaududi 0:4fb921928934 52 extern UCHAR current_bool_value =1; // trigger for zero detection within the code
nmaududi 0:4fb921928934 53 extern UCHAR last_bool_value = 1; // trigger for zero detection within the code
nmaududi 2:64a34ae90bb1 54 extern double SAMPLES_SECOND = 0.0001;
nmaududi 0:4fb921928934 55
nmaududi 2:64a34ae90bb1 56 extern uint16_t freq_value = 0;
bcis93 1:9fa7cc80f1a7 57
nmaududi 0:4fb921928934 58
nmaududi 0:4fb921928934 59 #ifdef __cplusplus
nmaududi 0:4fb921928934 60 }
nmaududi 0:4fb921928934 61 #endif
nmaududi 0:4fb921928934 62
nmaududi 0:4fb921928934 63 // read in ADC from the professor and store it within this function (ADC() will store a value within
nmaududi 0:4fb921928934 64 //will write code to keep going through this buffer, need to be able to store value to this function fast enough
nmaududi 0:4fb921928934 65 //uint16_t ADC_buffer;
nmaududi 0:4fb921928934 66 //UCHAR size_ADC_array = 10;
nmaududi 0:4fb921928934 67 void frequency_detect(void)
nmaududi 0:4fb921928934 68 { int32_t i;
nmaududi 0:4fb921928934 69
nmaududi 2:64a34ae90bb1 70 // if(reset_counter_flag == 1)
nmaududi 2:64a34ae90bb1 71 // {
nmaududi 2:64a34ae90bb1 72 // zero_detect_counter = 0; // reset the value of counter each 800us has passed, want to attain the moving average(fed from timer0.cpp)
nmaududi 2:64a34ae90bb1 73 // reset_counter_flag=0; // set reset flag back to 0
nmaududi 2:64a34ae90bb1 74 // }
nmaududi 2:64a34ae90bb1 75
nmaududi 0:4fb921928934 76
nmaududi 2:64a34ae90bb1 77
nmaududi 2:64a34ae90bb1 78 if(ADC_vortex_frequency_input <=(0))
nmaududi 0:4fb921928934 79 {
nmaududi 0:4fb921928934 80 current_bool_value =0; // negative values set to 0
nmaududi 0:4fb921928934 81 }
nmaududi 0:4fb921928934 82 else
nmaududi 0:4fb921928934 83 {
nmaududi 0:4fb921928934 84 current_bool_value =1; // positive value set to 1
nmaududi 0:4fb921928934 85 }
nmaududi 0:4fb921928934 86
nmaududi 0:4fb921928934 87 if((current_bool_value != last_bool_value))
nmaududi 0:4fb921928934 88 {
nmaududi 0:4fb921928934 89 last_bool_value = current_bool_value;
nmaududi 0:4fb921928934 90 zero_detect_counter = zero_detect_counter+1;
nmaududi 2:64a34ae90bb1 91
nmaududi 2:64a34ae90bb1 92 if ((frequency_buffer_count<9) && (zero_detect_counter>=2))
nmaududi 0:4fb921928934 93 {
nmaududi 2:64a34ae90bb1 94 frequency_buffer[frequency_buffer_count] = ((zero_detect_counter)/((sample_count)*(SAMPLES_SECOND)))/10;
nmaududi 0:4fb921928934 95 frequency_buffer_count = frequency_buffer_count+1;
nmaududi 2:64a34ae90bb1 96 zero_detect_counter = 0;
nmaududi 0:4fb921928934 97 }
nmaududi 0:4fb921928934 98 else
nmaududi 0:4fb921928934 99 {
nmaududi 2:64a34ae90bb1 100 frequency_buffer_count = 0;
nmaududi 2:64a34ae90bb1 101 }
nmaududi 0:4fb921928934 102
nmaududi 0:4fb921928934 103 }
nmaududi 0:4fb921928934 104
nmaududi 0:4fb921928934 105 if((zero_detect_counter == 0) & (reset_counter_flag == 0))
nmaududi 0:4fb921928934 106 {
nmaududi 0:4fb921928934 107 sample_count = 1;
nmaududi 0:4fb921928934 108 }
nmaududi 0:4fb921928934 109 else if(zero_detect_counter>0)
nmaududi 0:4fb921928934 110 {
nmaududi 0:4fb921928934 111 sample_count++; // only evaluated at the beginning of code during resets
nmaududi 0:4fb921928934 112 }
nmaududi 0:4fb921928934 113 else {
nmaududi 0:4fb921928934 114 sample_count = 1; // needed to not divide by zero
nmaududi 0:4fb921928934 115 }
nmaududi 0:4fb921928934 116
nmaududi 2:64a34ae90bb1 117 double sum_frequency_buffer= 0;
nmaududi 0:4fb921928934 118
nmaududi 2:64a34ae90bb1 119 for(i = 0; i < 10; ++i)
nmaududi 0:4fb921928934 120 {
nmaududi 0:4fb921928934 121 sum_frequency_buffer += frequency_buffer[i];
nmaududi 0:4fb921928934 122 }
nmaududi 0:4fb921928934 123
nmaududi 2:64a34ae90bb1 124 if ((sum_frequency_buffer/10)>3000)
nmaududi 0:4fb921928934 125 {
nmaududi 0:4fb921928934 126 freq_value = 0;
nmaududi 0:4fb921928934 127 }
nmaududi 0:4fb921928934 128 else
nmaududi 0:4fb921928934 129 {
nmaududi 2:64a34ae90bb1 130 freq_value = sum_frequency_buffer/10;
nmaududi 0:4fb921928934 131 }
nmaududi 2:64a34ae90bb1 132
nmaududi 0:4fb921928934 133 }
nmaududi 0:4fb921928934 134
nmaududi 0:4fb921928934 135
nmaududi 0:4fb921928934 136