不韋 呂
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
sai_io_o.hpp
00001 //----------------------------------------------------------- 00002 // SiaIO class for output (Header) 00003 // 2016/04/17, Copyright (c) 2016 MIKAMI, Naoki 00004 //----------------------------------------------------------- 00005 00006 #ifndef F746_SAI_IO_HPP 00007 #define F746_SAI_IO_HPP 00008 00009 #include "mbed.h" 00010 #include "stm32746g_discovery_audio.h" 00011 #include "BSP_AudioOut_Overwrite.hpp" 00012 00013 namespace Mikami 00014 { 00015 class SaiIO_O 00016 { 00017 public: 00018 SaiIO_O(int size, int fs); 00019 ~SaiIO_O(); 00020 00021 void InitCodecOut(); 00022 00023 bool IsXferred(); 00024 void Output(int16_t xL, int16_t xR); 00025 00026 void ResetXferred() { xferred_ = false; } 00027 int32_t GetLength() { return nData_; } 00028 void Stop() { BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW); } 00029 void Pause() { BSP_AUDIO_OUT_Pause(); } 00030 void Resume() { BSP_AUDIO_OUT_Resume(); } 00031 00032 00033 // These three member functions are called from 00034 // callback functions in "BSP_AudioOut_Overwrite.cpp" 00035 00036 // Called form BSP_AUDIO_OUT_HalfTransfer_CallBack() 00037 static void FillBuffer1st() { FillBuffer(0); } 00038 // Called form BSP_AUDIO_OUT_TransferComplete_CallBack() 00039 static void FillBuffer2nd() { FillBuffer(bufferSize_/2); } 00040 // Also called form BSP_AUDIO_OUT_Error_CallBack() 00041 static void ErrorTrap(); 00042 00043 private: 00044 const int FS_; 00045 static const uint8_t VOLUME_OUT_ = 90; 00046 00047 static int32_t nData_; 00048 static int32_t bufferSize_; 00049 00050 static int16_t* outBuffer_; 00051 static int16_t* tmp_; 00052 00053 static __IO bool xferred_; 00054 00055 __IO int32_t tmpIndex_; 00056 00057 static void FillBuffer(uint32_t offset); 00058 }; 00059 } 00060 #endif // F746_SAI_IO_HPP
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