不韋 呂 / F446_AD_DA_LinearPhase

Nucleo-F446RE 内蔵の AD/DA を使うためのライブラリ．DA からの出力は，標本化周波数の４倍のレートで行う．出力の補間フィルタには直線位相の FIR フィルタを使用． 　このライブラリを登録した際のプログラム： Demo_F446_AD_DA_MultirateLinearPhase. Library for built-in ADC and DAC in Nucleo-F446RE. Sampling rate for DAC is four times of that for ADC. Interpolation filter for output is linear-phase FIR filter.

Dependencies:   Array_Matrix

Dependents:   Demo_F446_AD_DA_MultirateLinearPhase

F446_DAC.hpp@0:ad30ac2b412b, 2018-07-03 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Jul 03 01:29:13 2018 +0000
Revision:
0:ad30ac2b412b
Child:
1:cd42ecc1e174
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:ad30ac2b412b 1 //--------------------------------------------------------
MikamiUitOpen 0:ad30ac2b412b 2 // Class for buit-in single DAC on STM32F446 ---- Header
MikamiUitOpen 0:ad30ac2b412b 3 //
MikamiUitOpen 0:ad30ac2b412b 4 // STM32F446 内蔵の DAC 用のクラス（ヘッダ）
MikamiUitOpen 0:ad30ac2b412b 5 // 選択可能な入力端子：
MikamiUitOpen 0:ad30ac2b412b 6 // A2 (PA_4)： ---- デフォルト
MikamiUitOpen 0:ad30ac2b412b 7 // D13 (PA_5)： このポートはマイコンボードの LED もドライブするので
MikamiUitOpen 0:ad30ac2b412b 8 // このポートは使わない方がよい
MikamiUitOpen 0:ad30ac2b412b 9 //
MikamiUitOpen 0:ad30ac2b412b 10 // 2018/05/16, Copyright (c) 2018 MIKAMI, Naoki
MikamiUitOpen 0:ad30ac2b412b 11 //--------------------------------------------------------
MikamiUitOpen 0:ad30ac2b412b 12
MikamiUitOpen 0:ad30ac2b412b 13 #include "mbed.h"
MikamiUitOpen 0:ad30ac2b412b 14
MikamiUitOpen 0:ad30ac2b412b 15 #ifndef STM32F446xx
MikamiUitOpen 0:ad30ac2b412b 16 #error Not NUCLEO-F446RE.
MikamiUitOpen 0:ad30ac2b412b 17 #endif
MikamiUitOpen 0:ad30ac2b412b 18
MikamiUitOpen 0:ad30ac2b412b 19 #ifndef F446_DAC_SINGLE_HPP
MikamiUitOpen 0:ad30ac2b412b 20 #define F446_DAC_SINGLE_HPP
MikamiUitOpen 0:ad30ac2b412b 21
MikamiUitOpen 0:ad30ac2b412b 22 namespace Mikami
MikamiUitOpen 0:ad30ac2b412b 23 {
MikamiUitOpen 0:ad30ac2b412b 24 class DacF446
MikamiUitOpen 0:ad30ac2b412b 25 {
MikamiUitOpen 0:ad30ac2b412b 26 public:
MikamiUitOpen 0:ad30ac2b412b 27 // Constructor
MikamiUitOpen 0:ad30ac2b412b 28 explicit DacF446(PinName pin = A2);
MikamiUitOpen 0:ad30ac2b412b 29
MikamiUitOpen 0:ad30ac2b412b 30 virtual ~DacF446() {}
MikamiUitOpen 0:ad30ac2b412b 31
MikamiUitOpen 0:ad30ac2b412b 32 // -1.0f <= data <= 1.0f
MikamiUitOpen 0:ad30ac2b412b 33 void Write(float data) { WriteDac(ToUint16(data)); }
MikamiUitOpen 0:ad30ac2b412b 34
MikamiUitOpen 0:ad30ac2b412b 35 // 0 <= data1<= 4095
MikamiUitOpen 0:ad30ac2b412b 36 void Write(uint16_t data) { WriteDac(__USAT(data, BIT_WIDTH_)); }
MikamiUitOpen 0:ad30ac2b412b 37
MikamiUitOpen 0:ad30ac2b412b 38 private:
MikamiUitOpen 0:ad30ac2b412b 39 void (DacF446::*fpWriteDac)(uint16_t);
MikamiUitOpen 0:ad30ac2b412b 40
MikamiUitOpen 0:ad30ac2b412b 41 static const int BIT_WIDTH_ = 12;
MikamiUitOpen 0:ad30ac2b412b 42 AnalogOut da_;
MikamiUitOpen 0:ad30ac2b412b 43
MikamiUitOpen 0:ad30ac2b412b 44 // DAC の片方のチェンネルへ出力する
MikamiUitOpen 0:ad30ac2b412b 45 void WriteDac1(uint16_t val); // CH1 へ
MikamiUitOpen 0:ad30ac2b412b 46 void WriteDac2(uint16_t val); // CH2 へ
MikamiUitOpen 0:ad30ac2b412b 47
MikamiUitOpen 0:ad30ac2b412b 48 void WriteDac(uint16_t val) { (this->*fpWriteDac)(val); }
MikamiUitOpen 0:ad30ac2b412b 49
MikamiUitOpen 0:ad30ac2b412b 50 // 飽和処理を行い uint16_t 型のデータを戻り値とする
MikamiUitOpen 0:ad30ac2b412b 51 uint16_t ToUint16(float val)
MikamiUitOpen 0:ad30ac2b412b 52 { return __USAT((val + 1.0f)*2048.0f, BIT_WIDTH_); }
MikamiUitOpen 0:ad30ac2b412b 53
MikamiUitOpen 0:ad30ac2b412b 54 // for inhibition of copy constructor
MikamiUitOpen 0:ad30ac2b412b 55 DacF446(const DacF446&);
MikamiUitOpen 0:ad30ac2b412b 56 // for inhibition of substitute operator
MikamiUitOpen 0:ad30ac2b412b 57 DacF446& operator=(const DacF446&);
MikamiUitOpen 0:ad30ac2b412b 58 };
MikamiUitOpen 0:ad30ac2b412b 59 }
MikamiUitOpen 0:ad30ac2b412b 60 #endif // F446_DAC_SINGLE_HPP