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
MyClasses_Functions/FrquencyResponseDrawer.cpp
- Committer:
- MikamiUitOpen
- Date:
- 2016-04-08
- Revision:
- 0:6748e3332e85
File content as of revision 0:6748e3332e85:
//----------------------------------------------------------- // FrqRespDrawer class (Abstract base class) // // 2016/03/31, 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_*(P_.MAX_DB - P_.MIN_DB); int logMin = (int)floorf(log10f(P_.MIN)); int loop = (int)floorf(log10f(P_.MAX)) - logMin; lcd_->SetTextColor(P_.AXIS_COLOR); uint16_t y0 = P_.ORGY- height; lcd_->DrawVLine(X(P_.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(P_.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 < P_.MAX) ? 10.0f*du : P_.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(P_.MAX), y0, height); // 最大値に対応する線 uint16_t width = X(P_.MAX) - X(P_.MIN); for (int n=0; n<= (P_.MAX_DB - P_.MIN_DB)/10; n++) lcd_->DrawHLine(X(P_.MIN), P_.ORGY-P_.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 = P_.ORG + offsetX; uint16_t y0 = P_.ORGY + offsetY; for (int n=0; n<count; n++) new NumericLabel<int>(x0, y0-n*d_dB*DB1_, fmt, (int)(P_.MIN_DB+d_dB*n)); } // 周波数特性のグラフの描画 void FrqRespDrawer::DrawGraph() { lcd_->SetTextColor(P_.LINE_COLOR); uint16_t width = X(P_.MAX) - X(P_.MIN); uint16_t x1 = 0; uint16_t y1 = 0; float pi2FsM = -6.283185f/P_.FS; // -2*PI*Ts for (int n=0; n<=width; n++) { float frq = PosToFrq(n+P_.ORG); uint16_t x2 = X(frq); float absHz = AbsH_z(exp(Complex(0, pi2FsM*frq))); float dB = (absHz > 0.001f) ? 20.0f*log10f(absHz) : P_.MIN_DB; uint16_t y2 = P_.ORGY - Round((dB - P_.MIN_DB)*DB1_); if (y2 > P_.ORGY) y2 = P_.ORGY; if (n != 0) lcd_->DrawLine(x1, y1, x2, y2); x1 = x2; y1 = y2; } lcd_->SetTextColor(P_.AXIS_COLOR); lcd_->DrawHLine(X(P_.MIN), P_.ORGY, width); } // 消去 void FrqRespDrawer::Erase() { lcd_->SetTextColor(P_.BACK_COLOR); uint16_t height = DB1_*(P_.MAX_DB - P_.MIN_DB); lcd_->FillRect(P_.ORG, P_.ORGY- height, X(P_.MAX)-X(P_.MIN)+1, height+1); } }