![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Output the audio signal (*.bin) with filtering by IIR filter in the SD card using onboard CODEC. For *.wav file, F746_SD_WavPlayer and F746_SD_GraphicEqualiser are published on mbed. SD カードのオーディオ信号 (*.bin) を遮断周波数可変の IIR フィルタを通して,ボードに搭載されているCODEC で出力する.*.wav 形式のファイル用には,F746_SD_WavPlayer と F746_SD_GraphicEqualiser を mbed で公開している.
Dependencies: BSP_DISCO_F746NG_patch_fixed F746_GUI LCD_DISCO_F746NG SDFileSystem_Warning_Fixed TS_DISCO_F746NG mbed
Diff: MyClasses_Functions/FrquencyResponseDrawer.cpp
- Revision:
- 4:76aa20fb326a
- Child:
- 5:4a99dabc9180
diff -r 492cb0f68526 -r 76aa20fb326a MyClasses_Functions/FrquencyResponseDrawer.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MyClasses_Functions/FrquencyResponseDrawer.cpp Sat Apr 16 13:53:53 2016 +0000 @@ -0,0 +1,88 @@ +//----------------------------------------------------------- +// FrqRespDrawer class +// +// 2016/04/16, Copyright (c) 2016 MIKAMI, Naoki +//----------------------------------------------------------- + +#include "FrquencyResponseDrawer.hpp" +#include "NumericLabel.hpp" + +namespace Mikami +{ + // 目盛線の描画 + void FrqRespDrawer::DrawAxis() + { + uint16_t height = DB1_*(MAX_DB_ - MIN_DB_); + int logMin = (int)floorf(log10f(MIN_)); + int loop = (int)floorf(log10f(MAX_)) - logMin; + + lcd_->SetTextColor(AXIS_COLOR_); + uint16_t y0 = ORGY_ - height; + lcd_->DrawVLine(X(MIN_), y0, height); // 最小値に対応する線 + + float du = powf(10.0, logMin); // 座標値の増分 + float u1 = (floorf(MIN_/du) + 1.0f)*du; // 最小値に対応する線の次の座標値 + + for (int n=0; n<=loop; n++) + { + float uMax = (10.0f*du < MAX_) ? 10.0f*du : MAX_; + for (float u=u1; u<uMax*0.99f; u+=du) + lcd_->DrawVLine(X(u), y0, height); + + du = uMax; // 値の増分を 10 倍する + u1 = du; // 次の for ループ の最初の値 + } + + lcd_->DrawVLine(X(MAX_), y0, height); // 最大値に対応する線 + + uint16_t width = X(MAX_) - X(MIN_); + for (int n=0; n<= (MAX_DB_ - MIN_DB_)/10; n++) + lcd_->DrawHLine(X(MIN_), ORGY_-DB10_*n, width); + } + + // 縦軸の数値の表示 + void FrqRespDrawer::DrawNumericY(int offsetX, int offsetY, int count, + uint16_t d_dB, const char fmt[], sFONT &fonts, + uint32_t textColor) + { + uint16_t x0 = ORG_ + offsetX; + uint16_t y0 = ORGY_ + offsetY; + for (int n=0; n<count; n++) + new NumericLabel<int>(x0, y0-n*d_dB*DB1_, + fmt, (int)(MIN_DB_+d_dB*n)); + } + + // 周波数特性のグラフの描画 + void FrqRespDrawer::DrawGraph(FrequencyResponse &frqResp) + { + lcd_->SetTextColor(LINE_COLOR_); + uint16_t width = X(MAX_) - X(MIN_); + uint16_t x1 = 0; + uint16_t y1 = 0; + float pi2FsM = -6.283185f/FS_; // -2*PI*Ts + for (int n=0; n<=width; n++) + { + float frq = PosToFrq(n+ORG_); + uint16_t x2 = X(frq); + float absHz = frqResp.AbsH_z(exp(Complex(0, pi2FsM*frq))); + float dB = (absHz > 0.001f) ? 20.0f*log10f(absHz) : MIN_DB_; + uint16_t y2 = ORGY_ - Round((dB - MIN_DB_)*DB1_); + if (y2 > ORGY_) y2 = ORGY_; + + if (n != 0) lcd_->DrawLine(x1, y1, x2, y2); + + x1 = x2; + y1 = y2; + } + lcd_->SetTextColor(AXIS_COLOR_); + lcd_->DrawHLine(X(MIN_), ORGY_, width); + } + + // 消去 + void FrqRespDrawer::Erase() + { + lcd_->SetTextColor(BACK_COLOR_); + uint16_t height = DB1_*(MAX_DB_ - MIN_DB_); + lcd_->FillRect(ORG_, ORGY_- height, X(MAX_)-X(MIN_)+1, height+1); + } +}