不韋 呂 / Mbed 2 deprecated UIT2_SpectrumAnalyzer

Real-time spectrum analyzer for ST Nucleo F401RE using Seeed Studio 2.8'' TFT Touch Shield V2.0.

Dependencies:   SeeedStudioTFTv2 UITDSP_ADDA UIT_FFT_Real mbed

SpactrumAnalysisClasses/SpectrumDisplay.cpp@0:c5b026c2d07e, 2015-07-26 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Jul 26 02:48:23 2015 +0000
Revision:
0:c5b026c2d07e
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:c5b026c2d07e 1 //-------------------------------------------------------
MikamiUitOpen 0:c5b026c2d07e 2 // Class for display spectrum
MikamiUitOpen 0:c5b026c2d07e 3 // Copyright (c) 2014 MIKAMI, Naoki, 2014/12/28
MikamiUitOpen 0:c5b026c2d07e 4 //-------------------------------------------------------
MikamiUitOpen 0:c5b026c2d07e 5
MikamiUitOpen 0:c5b026c2d07e 6 #include "SpectrumDisplay.hpp"
MikamiUitOpen 0:c5b026c2d07e 7
MikamiUitOpen 0:c5b026c2d07e 8 namespace Mikami
MikamiUitOpen 0:c5b026c2d07e 9 {
MikamiUitOpen 0:c5b026c2d07e 10 SpectrumDisplay::SpectrumDisplay(
MikamiUitOpen 0:c5b026c2d07e 11 SeeedStudioTFTv2* lcd,
MikamiUitOpen 0:c5b026c2d07e 12 int nFft, int x0, int y0,
MikamiUitOpen 0:c5b026c2d07e 13 float db1, int bin, float maxDb, int fs)
MikamiUitOpen 0:c5b026c2d07e 14 : N_FFT_(nFft), X0_(x0), Y0_(y0),
MikamiUitOpen 0:c5b026c2d07e 15 DB1_(db1), BIN_(bin), MAX_DB_(maxDb), FS_(fs),
MikamiUitOpen 0:c5b026c2d07e 16 lcd_(lcd)
MikamiUitOpen 0:c5b026c2d07e 17 {
MikamiUitOpen 0:c5b026c2d07e 18 lcd_->background(Navy);
MikamiUitOpen 0:c5b026c2d07e 19 lcd_->foreground(White);
MikamiUitOpen 0:c5b026c2d07e 20 lcd_->cls();
MikamiUitOpen 0:c5b026c2d07e 21 lcd_->set_orientation(1);
MikamiUitOpen 0:c5b026c2d07e 22 lcd_->set_font((uint8_t*) Arial12x12);
MikamiUitOpen 0:c5b026c2d07e 23 lcd_->locate(86,3);
MikamiUitOpen 0:c5b026c2d07e 24 lcd_->printf("Spectrum Analyzer");
MikamiUitOpen 0:c5b026c2d07e 25
MikamiUitOpen 0:c5b026c2d07e 26 AxisX();
MikamiUitOpen 0:c5b026c2d07e 27 AxisY();
MikamiUitOpen 0:c5b026c2d07e 28 }
MikamiUitOpen 0:c5b026c2d07e 29
MikamiUitOpen 0:c5b026c2d07e 30 void SpectrumDisplay::BarChart(float db[], float offset)
MikamiUitOpen 0:c5b026c2d07e 31 {
MikamiUitOpen 0:c5b026c2d07e 32 for (int n=1; n<=N_FFT_/2; n++)
MikamiUitOpen 0:c5b026c2d07e 33 {
MikamiUitOpen 0:c5b026c2d07e 34 float h = ((db[n] + offset) >= 0)? db[n] + offset : 0;
MikamiUitOpen 0:c5b026c2d07e 35 if (h > MAX_DB_) h = MAX_DB_;
MikamiUitOpen 0:c5b026c2d07e 36 int y = Y0_ - (int)(h*DB1_);
MikamiUitOpen 0:c5b026c2d07e 37 lcd_->line(X0_+n, Y0_-1, X0_+n, y, Cyan);
MikamiUitOpen 0:c5b026c2d07e 38 lcd_->line(X0_+n, y-1, X0_+n, Y0_-(int)(MAX_DB_*DB1_), Navy);
MikamiUitOpen 0:c5b026c2d07e 39 }
MikamiUitOpen 0:c5b026c2d07e 40 lcd_->line(X0_, Y0_, X0_+BIN_*N_FFT_/2, Y0_, Yellow);
MikamiUitOpen 0:c5b026c2d07e 41 }
MikamiUitOpen 0:c5b026c2d07e 42
MikamiUitOpen 0:c5b026c2d07e 43 void SpectrumDisplay::LineChart(float db[], float offset)
MikamiUitOpen 0:c5b026c2d07e 44 {
MikamiUitOpen 0:c5b026c2d07e 45 lcd_->fillrect(X0_+1, Y0_-(int)(MAX_DB_*DB1_),
MikamiUitOpen 0:c5b026c2d07e 46 X0_+N_FFT_*BIN_/2, Y0_-1, Navy);
MikamiUitOpen 0:c5b026c2d07e 47
MikamiUitOpen 0:c5b026c2d07e 48 float db1 = ((db[1] + offset) > 0)? db[1] + offset : 0;
MikamiUitOpen 0:c5b026c2d07e 49 int y1 = Y0_ - (int)(db1*DB1_);
MikamiUitOpen 0:c5b026c2d07e 50 for (int n=1; n<N_FFT_/2; n++)
MikamiUitOpen 0:c5b026c2d07e 51 {
MikamiUitOpen 0:c5b026c2d07e 52 float db2 = ((db[n+1] + offset) > 0)? db[n+1] + offset : 0;
MikamiUitOpen 0:c5b026c2d07e 53 if (db2 > MAX_DB_) db2 = MAX_DB_;
MikamiUitOpen 0:c5b026c2d07e 54 int y2 = Y0_ - (int)(db2*DB1_);
MikamiUitOpen 0:c5b026c2d07e 55 lcd_->line(X0_+n, y1, X0_+n+1, y2, Cyan);
MikamiUitOpen 0:c5b026c2d07e 56 y1 = y2;
MikamiUitOpen 0:c5b026c2d07e 57 }
MikamiUitOpen 0:c5b026c2d07e 58 lcd_->line(X0_, Y0_, X0_+BIN_*N_FFT_/2, Y0_, Yellow);
MikamiUitOpen 0:c5b026c2d07e 59 }
MikamiUitOpen 0:c5b026c2d07e 60
MikamiUitOpen 0:c5b026c2d07e 61 void SpectrumDisplay::DisplayVolume(float volume)
MikamiUitOpen 0:c5b026c2d07e 62 {
MikamiUitOpen 0:c5b026c2d07e 63 const int X_POS = 305;
MikamiUitOpen 0:c5b026c2d07e 64 const float TH = 0.85f;
MikamiUitOpen 0:c5b026c2d07e 65 if (volume < TH) // volume < 85 %
MikamiUitOpen 0:c5b026c2d07e 66 {
MikamiUitOpen 0:c5b026c2d07e 67 lcd_->fillrect(X_POS, Y0_-DB1_*MAX_DB_, X_POS+5, Y0_, Navy);
MikamiUitOpen 0:c5b026c2d07e 68 lcd_->fillrect(X_POS, Y0_-DB1_*MAX_DB_*volume,
MikamiUitOpen 0:c5b026c2d07e 69 X_POS+5, Y0_, Cyan);
MikamiUitOpen 0:c5b026c2d07e 70 }
MikamiUitOpen 0:c5b026c2d07e 71 else // volume >= 85 %
MikamiUitOpen 0:c5b026c2d07e 72 {
MikamiUitOpen 0:c5b026c2d07e 73 lcd_->fillrect(X_POS, Y0_-DB1_*MAX_DB_, X_POS+5, Y0_, Navy);
MikamiUitOpen 0:c5b026c2d07e 74 lcd_->fillrect(X_POS, Y0_-DB1_*MAX_DB_*volume,
MikamiUitOpen 0:c5b026c2d07e 75 X_POS+5, Y0_-DB1_*MAX_DB_*TH, Red);
MikamiUitOpen 0:c5b026c2d07e 76 lcd_->fillrect(X_POS, Y0_-DB1_*MAX_DB_*TH, X_POS+5, Y0_, Cyan);
MikamiUitOpen 0:c5b026c2d07e 77 }
MikamiUitOpen 0:c5b026c2d07e 78 }
MikamiUitOpen 0:c5b026c2d07e 79
MikamiUitOpen 0:c5b026c2d07e 80 // x-axis
MikamiUitOpen 0:c5b026c2d07e 81 void SpectrumDisplay::AxisX()
MikamiUitOpen 0:c5b026c2d07e 82 {
MikamiUitOpen 0:c5b026c2d07e 83 lcd_->line(X0_, Y0_, X0_+BIN_*N_FFT_/2, Y0_, Yellow);
MikamiUitOpen 0:c5b026c2d07e 84 float dx = BIN_*(N_FFT_*1000.0f)/(float)FS_;
MikamiUitOpen 0:c5b026c2d07e 85 for (int n=0; n<=5; n++)
MikamiUitOpen 0:c5b026c2d07e 86 {
MikamiUitOpen 0:c5b026c2d07e 87 int xTick = X0_ + (int)(dx*n + 0.5f);
MikamiUitOpen 0:c5b026c2d07e 88 lcd_->locate(xTick-4, Y0_+10);
MikamiUitOpen 0:c5b026c2d07e 89 lcd_->printf("%d", n);
MikamiUitOpen 0:c5b026c2d07e 90 lcd_->line(xTick, Y0_, xTick, Y0_+5, Yellow);
MikamiUitOpen 0:c5b026c2d07e 91 }
MikamiUitOpen 0:c5b026c2d07e 92 lcd_->locate(110, Y0_+24);
MikamiUitOpen 0:c5b026c2d07e 93 lcd_->printf("Frequency [kHz]");
MikamiUitOpen 0:c5b026c2d07e 94 }
MikamiUitOpen 0:c5b026c2d07e 95
MikamiUitOpen 0:c5b026c2d07e 96 // y-axis
MikamiUitOpen 0:c5b026c2d07e 97 void SpectrumDisplay::AxisY()
MikamiUitOpen 0:c5b026c2d07e 98 {
MikamiUitOpen 0:c5b026c2d07e 99 lcd_->line(X0_, Y0_+5, X0_, Y0_-(int)(MAX_DB_*DB1_), Yellow);
MikamiUitOpen 0:c5b026c2d07e 100 for (int n=0; n<=(int)MAX_DB_; n+=20)
MikamiUitOpen 0:c5b026c2d07e 101 {
MikamiUitOpen 0:c5b026c2d07e 102 int yTick = Y0_-(int)(DB1_*n);
MikamiUitOpen 0:c5b026c2d07e 103 lcd_->locate(X0_-22, yTick-5);
MikamiUitOpen 0:c5b026c2d07e 104 lcd_->printf("%2d", n);
MikamiUitOpen 0:c5b026c2d07e 105 lcd_->line(X0_-5, yTick, X0_, yTick, Yellow);
MikamiUitOpen 0:c5b026c2d07e 106 }
MikamiUitOpen 0:c5b026c2d07e 107 lcd_->locate(X0_-27, Y0_-(int)(DB1_*MAX_DB_)-18);
MikamiUitOpen 0:c5b026c2d07e 108 lcd_->printf("[dB]");
MikamiUitOpen 0:c5b026c2d07e 109 }
MikamiUitOpen 0:c5b026c2d07e 110 }