不韋 呂 / Mbed 2 deprecated SDR_AM_Rx_CIC

AM中波放送用SDR．CICフィルタのみを使用．CQ出版社「トランジスタ技術」誌，2021年4月号に掲載

Dependencies:   mbed

SDR_Library/F446_DAC.hpp@0:6906f8616429, 2019-09-16 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Sep 16 14:20:17 2019 +0000
Revision:
0:6906f8616429
Child:
1:30d9fb51dec1
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:6906f8616429 1 //--------------------------------------------------------
MikamiUitOpen 0:6906f8616429 2 // STM32F446 内蔵の DAC 用のクラス
MikamiUitOpen 0:6906f8616429 3 // 出力端子： A2 (PA_4)
MikamiUitOpen 0:6906f8616429 4 //
MikamiUitOpen 0:6906f8616429 5 // 2019/02/18, Copyright (c) 2019 MIKAMI, Naoki
MikamiUitOpen 0:6906f8616429 6 //--------------------------------------------------------
MikamiUitOpen 0:6906f8616429 7 #include "mbed.h"
MikamiUitOpen 0:6906f8616429 8
MikamiUitOpen 0:6906f8616429 9 #ifndef DAC_F446_SINGLE_HPP
MikamiUitOpen 0:6906f8616429 10 #define DAC_F446_SINGLE_HPP
MikamiUitOpen 0:6906f8616429 11
MikamiUitOpen 0:6906f8616429 12 namespace Mikami
MikamiUitOpen 0:6906f8616429 13 {
MikamiUitOpen 0:6906f8616429 14 class DacF446
MikamiUitOpen 0:6906f8616429 15 {
MikamiUitOpen 0:6906f8616429 16 public:
MikamiUitOpen 0:6906f8616429 17 // コンストラクタ， A2 に接続される CH1 のみを有効にする
MikamiUitOpen 0:6906f8616429 18 DacF446() : da_(A2) { DAC->CR = DAC_CR_EN1; }
MikamiUitOpen 0:6906f8616429 19
MikamiUitOpen 0:6906f8616429 20 virtual ~DacF446() {}
MikamiUitOpen 0:6906f8616429 21
MikamiUitOpen 0:6906f8616429 22 // -1.0f <= data <= 1.0f
MikamiUitOpen 0:6906f8616429 23 void Write(float data) { WriteDac1(ToUint16(data)); }
MikamiUitOpen 0:6906f8616429 24
MikamiUitOpen 0:6906f8616429 25 // 0 <= data <= 4095
MikamiUitOpen 0:6906f8616429 26 void Write(uint16_t data) { WriteDac1(__USAT(data, BIT_WIDTH_)); }
MikamiUitOpen 0:6906f8616429 27
MikamiUitOpen 0:6906f8616429 28 private:
MikamiUitOpen 0:6906f8616429 29 static const int BIT_WIDTH_ = 12;
MikamiUitOpen 0:6906f8616429 30 AnalogOut da_;
MikamiUitOpen 0:6906f8616429 31
MikamiUitOpen 0:6906f8616429 32 // DAC の CH1 へ右詰めで出力する
MikamiUitOpen 0:6906f8616429 33 void WriteDac1(uint16_t val) { DAC->DHR12R1 = val; }
MikamiUitOpen 0:6906f8616429 34
MikamiUitOpen 0:6906f8616429 35 // 飽和処理を行い uint16_t 型のデータを戻り値とする
MikamiUitOpen 0:6906f8616429 36 uint16_t ToUint16(float val)
MikamiUitOpen 0:6906f8616429 37 { return __USAT((val + 1.0f)*2048.0f, BIT_WIDTH_); }
MikamiUitOpen 0:6906f8616429 38
MikamiUitOpen 0:6906f8616429 39 // コピー･コンストラクタ禁止のため
MikamiUitOpen 0:6906f8616429 40 DacF446(const DacF446&);
MikamiUitOpen 0:6906f8616429 41 // 代入演算子禁止のため
MikamiUitOpen 0:6906f8616429 42 DacF446& operator=(const DacF446&);
MikamiUitOpen 0:6906f8616429 43 };
MikamiUitOpen 0:6906f8616429 44 }
MikamiUitOpen 0:6906f8616429 45 #endif // DAC_F446_SINGLE_HPP
MikamiUitOpen 0:6906f8616429 46