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@0:c945b4fe9a48, 2016-11-11 (annotated)

Committer:
MikamiUitOpen
Date:
Fri Nov 11 06:28:48 2016 +0000
Revision:
0:c945b4fe9a48
Child:
1:6b9f2af6613d
1

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 0:c945b4fe9a48 7 // Analog Out1: A2 (PA_4)
MikamiUitOpen 0:c945b4fe9a48 8 // Analog Out2: D13 (PA_5)
MikamiUitOpen 0:c945b4fe9a48 9 //
MikamiUitOpen 0:c945b4fe9a48 10 // 2016/11/11, Copyright (c) 2016 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 0:c945b4fe9a48 16 #error Select STM32F446.
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 0:c945b4fe9a48 37 void Write(float data1, float data2)
MikamiUitOpen 0:c945b4fe9a48 38 { WriteDac(ToUint16(data2), ToUint16(data1)); }
MikamiUitOpen 0:c945b4fe9a48 39
MikamiUitOpen 0:c945b4fe9a48 40 // 0 <= data1, data2 <= 4095
MikamiUitOpen 0:c945b4fe9a48 41 void Write(uint16_t data1, uint16_t data2)
MikamiUitOpen 0:c945b4fe9a48 42 { WriteDac(SatUint16(data2), SatUint16(data1)); }
MikamiUitOpen 0:c945b4fe9a48 43
MikamiUitOpen 0:c945b4fe9a48 44 // Set TIM3 for clock of switched-capacitor filter
MikamiUitOpen 0:c945b4fe9a48 45 void ScfClock(uint32_t clock);
MikamiUitOpen 0:c945b4fe9a48 46
MikamiUitOpen 0:c945b4fe9a48 47 private:
MikamiUitOpen 0:c945b4fe9a48 48 static const uint32_t swtrig_ = DAC_SWTRIGR_SWTRIG1
MikamiUitOpen 0:c945b4fe9a48 49 | DAC_SWTRIGR_SWTRIG2;
MikamiUitOpen 0:c945b4fe9a48 50 AnalogOut da1_, da2_;
MikamiUitOpen 0:c945b4fe9a48 51
MikamiUitOpen 0:c945b4fe9a48 52 // Write dual-channel data
MikamiUitOpen 0:c945b4fe9a48 53 void WriteDac(uint16_t val1, uint16_t val2)
MikamiUitOpen 0:c945b4fe9a48 54 {
MikamiUitOpen 0:c945b4fe9a48 55 DAC->DHR12RD = (val2 << 16) | val1;
MikamiUitOpen 0:c945b4fe9a48 56 DAC->SWTRIGR = swtrig_;
MikamiUitOpen 0:c945b4fe9a48 57 }
MikamiUitOpen 0:c945b4fe9a48 58
MikamiUitOpen 0:c945b4fe9a48 59 // Saturate float to an unsigned 16-bit value
MikamiUitOpen 0:c945b4fe9a48 60 uint16_t ToUint16(float val)
MikamiUitOpen 0:c945b4fe9a48 61 {
MikamiUitOpen 0:c945b4fe9a48 62 if (val < -1.0f) val = -1.0f;
MikamiUitOpen 0:c945b4fe9a48 63 if (val > 1.0f) val = 1.0f;
MikamiUitOpen 0:c945b4fe9a48 64 return (uint16_t)((val + 1.0f)*2047);
MikamiUitOpen 0:c945b4fe9a48 65 }
MikamiUitOpen 0:c945b4fe9a48 66
MikamiUitOpen 0:c945b4fe9a48 67 // Saturate to an unsigned 16-bit value
MikamiUitOpen 0:c945b4fe9a48 68 uint16_t SatUint16(uint16_t val)
MikamiUitOpen 0:c945b4fe9a48 69 { return (val > 4095) ? 4095 : val; }
MikamiUitOpen 0:c945b4fe9a48 70
MikamiUitOpen 0:c945b4fe9a48 71 // for inhibition of copy constructor
MikamiUitOpen 0:c945b4fe9a48 72 DacDual(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 73 // for inhibition of substitute operator
MikamiUitOpen 0:c945b4fe9a48 74 DacDual& operator=(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 75 };
MikamiUitOpen 0:c945b4fe9a48 76 }
MikamiUitOpen 0:c945b4fe9a48 77 #endif // F446_DAC_DUAL_HPP