不韋 呂 / DSP_ADDA

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Dependents:   Demo_DSP_ADDA F446_DSP_FFT_Analyzer TrG_FFT_Analyzer DSP_MultirateLinearphase ... more

DSP_Dac.hpp@0:85348d58f498, 2020-05-21 (annotated)

Committer:
MikamiUitOpen
Date:
Thu May 21 10:42:04 2020 +0000
Revision:
0:85348d58f498
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:85348d58f498 1 //--------------------------------------------------------------------
MikamiUitOpen 0:85348d58f498 2 // STM32F446 内蔵の DAC 用のクラス（ヘッダ）
MikamiUitOpen 0:85348d58f498 3 // 選択可能な入力端子：
MikamiUitOpen 0:85348d58f498 4 // A2 (PA_4)： ---- デフォルト
MikamiUitOpen 0:85348d58f498 5 // D13 (PA_5)： このポートはマイコンボードの LED もドライブ
MikamiUitOpen 0:85348d58f498 6 // するのでこのポートは使わない方がよい
MikamiUitOpen 0:85348d58f498 7 //
MikamiUitOpen 0:85348d58f498 8 // 2020/05/21, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:85348d58f498 9 //--------------------------------------------------------------------
MikamiUitOpen 0:85348d58f498 10
MikamiUitOpen 0:85348d58f498 11 #include "mbed.h"
MikamiUitOpen 0:85348d58f498 12 #include "pinmap.h" // pin_function() で使用
MikamiUitOpen 0:85348d58f498 13
MikamiUitOpen 0:85348d58f498 14 #ifndef DAC_BASE
MikamiUitOpen 0:85348d58f498 15 #error DAC not built in.
MikamiUitOpen 0:85348d58f498 16 #endif
MikamiUitOpen 0:85348d58f498 17
MikamiUitOpen 0:85348d58f498 18 #ifndef DSP_DAC_HPP
MikamiUitOpen 0:85348d58f498 19 #define DSP_DAC_HPP
MikamiUitOpen 0:85348d58f498 20
MikamiUitOpen 0:85348d58f498 21 namespace Mikami
MikamiUitOpen 0:85348d58f498 22 {
MikamiUitOpen 0:85348d58f498 23 class DspDac
MikamiUitOpen 0:85348d58f498 24 {
MikamiUitOpen 0:85348d58f498 25 public:
MikamiUitOpen 0:85348d58f498 26 // コンストラクタ
MikamiUitOpen 0:85348d58f498 27 explicit DspDac(PinName pin = A2);
MikamiUitOpen 0:85348d58f498 28
MikamiUitOpen 0:85348d58f498 29 virtual ~DspDac() {}
MikamiUitOpen 0:85348d58f498 30
MikamiUitOpen 0:85348d58f498 31 // -1.0f <= data <= 1.0f
MikamiUitOpen 0:85348d58f498 32 void Write(float data) { WriteDac(ToUint16(data)); }
MikamiUitOpen 0:85348d58f498 33
MikamiUitOpen 0:85348d58f498 34 // 0 <= data <= 4095
MikamiUitOpen 0:85348d58f498 35 void Write(uint16_t data) { WriteDac(__USAT(data, BIT_WIDTH_)); }
MikamiUitOpen 0:85348d58f498 36
MikamiUitOpen 0:85348d58f498 37 private:
MikamiUitOpen 0:85348d58f498 38 void (DspDac::*fpWrite_)(uint16_t);
MikamiUitOpen 0:85348d58f498 39
MikamiUitOpen 0:85348d58f498 40 static const int BIT_WIDTH_ = 12;
MikamiUitOpen 0:85348d58f498 41 DAC_TypeDef* const DAC_; // DA 変換器に対応する構造体のポインタ
MikamiUitOpen 0:85348d58f498 42 static bool created_; // このクラスのオブジェクトの複数生成禁止で使用
MikamiUitOpen 0:85348d58f498 43
MikamiUitOpen 0:85348d58f498 44 // DAC の片方のチェンネルへ出力する
MikamiUitOpen 0:85348d58f498 45 void WriteDac1(uint16_t val) { DAC->DHR12R1 = val; } // CH1 へ
MikamiUitOpen 0:85348d58f498 46 void WriteDac2(uint16_t val) { DAC->DHR12R2 = val; } // CH2 へ
MikamiUitOpen 0:85348d58f498 47
MikamiUitOpen 0:85348d58f498 48 void WriteDac(uint16_t val) { (this->*fpWrite_)(val); }
MikamiUitOpen 0:85348d58f498 49
MikamiUitOpen 0:85348d58f498 50 // 飽和処理を行い uint16_t 型のデータを戻り値とする
MikamiUitOpen 0:85348d58f498 51 uint16_t ToUint16(float val)
MikamiUitOpen 0:85348d58f498 52 { return __USAT((val + 1.0f)*2048.0f, BIT_WIDTH_); }
MikamiUitOpen 0:85348d58f498 53
MikamiUitOpen 0:85348d58f498 54 // コピー･コンストラクタ，代入演算子の禁止のため
MikamiUitOpen 0:85348d58f498 55 DspDac(const DspDac&);
MikamiUitOpen 0:85348d58f498 56 DspDac& operator=(const DspDac&);
MikamiUitOpen 0:85348d58f498 57 };
MikamiUitOpen 0:85348d58f498 58 }
MikamiUitOpen 0:85348d58f498 59 #endif // DSP_DAC_HPP