CQ出版社セミナ,2021/12/07開催「実習・C++言語によるArmマイコンのプログラミング」で使うプログラム.
Dependencies: Array_Matrix mbed SerialTxRxIntr UIT_FFT_Real
F446_ADDA/F446_Dac.hpp@5:5e55a5f440c0, 2020-04-02 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Thu Apr 02 01:12:34 2020 +0000
- Revision:
- 5:5e55a5f440c0
- Parent:
- 2:d28a3f741217
6
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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MikamiUitOpen | 2:d28a3f741217 | 1 | //-------------------------------------------------------- |
MikamiUitOpen | 2:d28a3f741217 | 2 | // STM32F446 内蔵の DAC 用のクラス |
MikamiUitOpen | 2:d28a3f741217 | 3 | // 出力端子: A2 (PA_4) |
MikamiUitOpen | 2:d28a3f741217 | 4 | // |
MikamiUitOpen | 2:d28a3f741217 | 5 | // 2020/01/28, Copyright (c) 2020 MIKAMI, Naoki |
MikamiUitOpen | 2:d28a3f741217 | 6 | //-------------------------------------------------------- |
MikamiUitOpen | 2:d28a3f741217 | 7 | #include "mbed.h" |
MikamiUitOpen | 2:d28a3f741217 | 8 | |
MikamiUitOpen | 2:d28a3f741217 | 9 | #ifndef DAC_F446_SINGLE_HPP |
MikamiUitOpen | 2:d28a3f741217 | 10 | #define DAC_F446_SINGLE_HPP |
MikamiUitOpen | 2:d28a3f741217 | 11 | |
MikamiUitOpen | 2:d28a3f741217 | 12 | namespace Mikami |
MikamiUitOpen | 2:d28a3f741217 | 13 | { |
MikamiUitOpen | 2:d28a3f741217 | 14 | class DacF446 |
MikamiUitOpen | 2:d28a3f741217 | 15 | { |
MikamiUitOpen | 2:d28a3f741217 | 16 | public: |
MikamiUitOpen | 2:d28a3f741217 | 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 | 2:d28a3f741217 | 18 | DacF446() : da_(A2) { DAC->CR = DAC_CR_EN1; } |
MikamiUitOpen | 2:d28a3f741217 | 19 | |
MikamiUitOpen | 2:d28a3f741217 | 20 | virtual ~DacF446() {} |
MikamiUitOpen | 2:d28a3f741217 | 21 | |
MikamiUitOpen | 2:d28a3f741217 | 22 | // -1.0f <= data <= 1.0f |
MikamiUitOpen | 2:d28a3f741217 | 23 | void Write(float data) { WriteDacCh1(ToUint16(data)); } |
MikamiUitOpen | 2:d28a3f741217 | 24 | |
MikamiUitOpen | 2:d28a3f741217 | 25 | // 0 <= data <= 4095 |
MikamiUitOpen | 2:d28a3f741217 | 26 | void Write(uint16_t data) { WriteDacCh1(__USAT(data, BIT_WIDTH_)); } |
MikamiUitOpen | 2:d28a3f741217 | 27 | |
MikamiUitOpen | 2:d28a3f741217 | 28 | private: |
MikamiUitOpen | 2:d28a3f741217 | 29 | static const int BIT_WIDTH_ = 12; |
MikamiUitOpen | 2:d28a3f741217 | 30 | AnalogOut da_; |
MikamiUitOpen | 2:d28a3f741217 | 31 | |
MikamiUitOpen | 2:d28a3f741217 | 32 | // DAC の CH1 へ右詰めで出力する |
MikamiUitOpen | 2:d28a3f741217 | 33 | void WriteDacCh1(uint16_t val) { DAC->DHR12R1 = val; } |
MikamiUitOpen | 2:d28a3f741217 | 34 | |
MikamiUitOpen | 2:d28a3f741217 | 35 | // 飽和処理を行い uint16_t 型のデータを戻り値とする |
MikamiUitOpen | 2:d28a3f741217 | 36 | uint16_t ToUint16(float val) |
MikamiUitOpen | 2:d28a3f741217 | 37 | { return __USAT((val + 1.0f)*2048.0f, BIT_WIDTH_); } |
MikamiUitOpen | 2:d28a3f741217 | 38 | |
MikamiUitOpen | 2:d28a3f741217 | 39 | // コピー・コンストラクタ禁止のため |
MikamiUitOpen | 2:d28a3f741217 | 40 | DacF446(const DacF446&); |
MikamiUitOpen | 2:d28a3f741217 | 41 | // 代入演算子禁止のため |
MikamiUitOpen | 2:d28a3f741217 | 42 | DacF446& operator=(const DacF446&); |
MikamiUitOpen | 2:d28a3f741217 | 43 | }; |
MikamiUitOpen | 2:d28a3f741217 | 44 | } |
MikamiUitOpen | 2:d28a3f741217 | 45 | #endif // DAC_F446_SINGLE_HPP |