不韋 呂 / F446_AD_DA

Library for build-in ADC and DAC in STM32F446 mounted on Nucleo F446RE. Nucleo F446RE に搭載されている STM32F446 の内蔵 ADC, DAC 用のライブラリ．

Dependents:   Demo_F446_AD_DA F446_MySoundMachine F446_ADF_Nlms F446_Spectrogram

F446_DAC.hpp@5:7851fd2f875b, 2017-02-21 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Feb 21 12:56:51 2017 +0000
Revision:
5:7851fd2f875b
Parent:
3:d1da91aec62f 
6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:c945b4fe9a48 1 //--------------------------------------------------------
MikamiUitOpen 0:c945b4fe9a48 2 // Class for buit-in dual DAC on STM32F446 ---- Header
MikamiUitOpen 0:c945b4fe9a48 3 // TIM3 is used for clock to external SCF
MikamiUitOpen 0:c945b4fe9a48 4 //
MikamiUitOpen 0:c945b4fe9a48 5 // STM32F446 内蔵の DAC 用のクラス（ヘッダ）
MikamiUitOpen 0:c945b4fe9a48 6 // TIM3 を外付けの SCF のクロックとして使用
MikamiUitOpen 5:7851fd2f875b 7 // A2 (PA_4)： 左
MikamiUitOpen 5:7851fd2f875b 8 // D13 (PA_5)： 右
MikamiUitOpen 0:c945b4fe9a48 9 //
MikamiUitOpen 5:7851fd2f875b 10 // 2017/02/19, Copyright (c) 2017 MIKAMI, Naoki
MikamiUitOpen 0:c945b4fe9a48 11 //--------------------------------------------------------
MikamiUitOpen 0:c945b4fe9a48 12
MikamiUitOpen 0:c945b4fe9a48 13 #include "mbed.h"
MikamiUitOpen 0:c945b4fe9a48 14
MikamiUitOpen 0:c945b4fe9a48 15 #ifndef STM32F446xx
MikamiUitOpen 3:d1da91aec62f 16 #error Select NUCLEO-F446RE.
MikamiUitOpen 0:c945b4fe9a48 17 #endif
MikamiUitOpen 0:c945b4fe9a48 18
MikamiUitOpen 0:c945b4fe9a48 19 #ifndef F446_DAC_DUAL_HPP
MikamiUitOpen 0:c945b4fe9a48 20 #define F446_DAC_DUAL_HPP
MikamiUitOpen 0:c945b4fe9a48 21
MikamiUitOpen 0:c945b4fe9a48 22 namespace Mikami
MikamiUitOpen 0:c945b4fe9a48 23 {
MikamiUitOpen 0:c945b4fe9a48 24 class DacDual
MikamiUitOpen 0:c945b4fe9a48 25 {
MikamiUitOpen 0:c945b4fe9a48 26 public:
MikamiUitOpen 0:c945b4fe9a48 27 // Constructor
MikamiUitOpen 0:c945b4fe9a48 28 DacDual() : da1_(PA_4), da2_(PA_5)
MikamiUitOpen 0:c945b4fe9a48 29 {
MikamiUitOpen 0:c945b4fe9a48 30 DAC->CR = DAC_CR_EN1 | DAC_CR_TEN1 | DAC_CR_TSEL1 |
MikamiUitOpen 0:c945b4fe9a48 31 DAC_CR_EN2 | DAC_CR_TEN2 | DAC_CR_TSEL2;
MikamiUitOpen 0:c945b4fe9a48 32 }
MikamiUitOpen 0:c945b4fe9a48 33
MikamiUitOpen 0:c945b4fe9a48 34 virtual ~DacDual() {}
MikamiUitOpen 0:c945b4fe9a48 35
MikamiUitOpen 0:c945b4fe9a48 36 // -1.0f <= data1, data2 <= 1.0f
MikamiUitOpen 1:6b9f2af6613d 37 // data1: left, data2: right
MikamiUitOpen 1:6b9f2af6613d 38 void Write(float data1, float data2)
MikamiUitOpen 1:6b9f2af6613d 39 { WriteDac(ToUint16(data1), ToUint16(data2)); }
MikamiUitOpen 0:c945b4fe9a48 40
MikamiUitOpen 0:c945b4fe9a48 41 // 0 <= data1, data2 <= 4095
MikamiUitOpen 1:6b9f2af6613d 42 // data1: left, data2: right
MikamiUitOpen 0:c945b4fe9a48 43 void Write(uint16_t data1, uint16_t data2)
MikamiUitOpen 5:7851fd2f875b 44 { WriteDac(__USAT(data1, BIT_WIDTH_),
MikamiUitOpen 5:7851fd2f875b 45 __USAT(data2, BIT_WIDTH_)); }
MikamiUitOpen 0:c945b4fe9a48 46
MikamiUitOpen 0:c945b4fe9a48 47 // Set TIM3 for clock of switched-capacitor filter
MikamiUitOpen 0:c945b4fe9a48 48 void ScfClock(uint32_t clock);
MikamiUitOpen 0:c945b4fe9a48 49
MikamiUitOpen 0:c945b4fe9a48 50 private:
MikamiUitOpen 5:7851fd2f875b 51 static const uint32_t SWTRIG_ = DAC_SWTRIGR_SWTRIG1
MikamiUitOpen 0:c945b4fe9a48 52 | DAC_SWTRIGR_SWTRIG2;
MikamiUitOpen 5:7851fd2f875b 53 static const int BIT_WIDTH_ = 12;
MikamiUitOpen 0:c945b4fe9a48 54 AnalogOut da1_, da2_;
MikamiUitOpen 0:c945b4fe9a48 55
MikamiUitOpen 0:c945b4fe9a48 56 // Write dual-channel data
MikamiUitOpen 0:c945b4fe9a48 57 void WriteDac(uint16_t val1, uint16_t val2)
MikamiUitOpen 0:c945b4fe9a48 58 {
MikamiUitOpen 5:7851fd2f875b 59 DAC->DHR12RD = __PKHBT(val1, val2, 16);
MikamiUitOpen 5:7851fd2f875b 60 DAC->SWTRIGR = SWTRIG_;
MikamiUitOpen 0:c945b4fe9a48 61 }
MikamiUitOpen 0:c945b4fe9a48 62
MikamiUitOpen 5:7851fd2f875b 63 // Saturate float to an unsigned 16-bit type
MikamiUitOpen 0:c945b4fe9a48 64 uint16_t ToUint16(float val)
MikamiUitOpen 0:c945b4fe9a48 65 {
MikamiUitOpen 5:7851fd2f875b 66 return __USAT((val + 1.0f)*2047.0f, BIT_WIDTH_);
MikamiUitOpen 0:c945b4fe9a48 67 }
MikamiUitOpen 0:c945b4fe9a48 68
MikamiUitOpen 0:c945b4fe9a48 69 // for inhibition of copy constructor
MikamiUitOpen 0:c945b4fe9a48 70 DacDual(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 71 // for inhibition of substitute operator
MikamiUitOpen 0:c945b4fe9a48 72 DacDual& operator=(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 73 };
MikamiUitOpen 0:c945b4fe9a48 74 }
MikamiUitOpen 1:6b9f2af6613d 75 #endif // F446_DAC_DUAL_HPP