Kenji Arai / F446_AD_DA

Added one channel mode

Dependents:   CW_Decoder_using_FFT_on_F446

Fork of F446_AD_DA by 不韋 呂

F446_DAC.hpp@3:d1da91aec62f, 2017-01-30 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Jan 30 08:12:44 2017 +0000
Revision:
3:d1da91aec62f
Parent:
1:6b9f2af6613d 
4

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 1:6b9f2af6613d 7 // DAC_OUT1: A2 (PA_4), 左
MikamiUitOpen 1:6b9f2af6613d 8 // DAC_OUT2: D13 (PA_5), 右
MikamiUitOpen 0:c945b4fe9a48 9 //
MikamiUitOpen 3:d1da91aec62f 10 // 2017/01/30, 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 1:6b9f2af6613d 44 { WriteDac(SatUint16(data1), SatUint16(data2)); }
MikamiUitOpen 0:c945b4fe9a48 45
MikamiUitOpen 0:c945b4fe9a48 46 // Set TIM3 for clock of switched-capacitor filter
MikamiUitOpen 0:c945b4fe9a48 47 void ScfClock(uint32_t clock);
MikamiUitOpen 0:c945b4fe9a48 48
MikamiUitOpen 0:c945b4fe9a48 49 private:
MikamiUitOpen 0:c945b4fe9a48 50 static const uint32_t swtrig_ = DAC_SWTRIGR_SWTRIG1
MikamiUitOpen 0:c945b4fe9a48 51 | DAC_SWTRIGR_SWTRIG2;
MikamiUitOpen 0:c945b4fe9a48 52 AnalogOut da1_, da2_;
MikamiUitOpen 0:c945b4fe9a48 53
MikamiUitOpen 0:c945b4fe9a48 54 // Write dual-channel data
MikamiUitOpen 0:c945b4fe9a48 55 void WriteDac(uint16_t val1, uint16_t val2)
MikamiUitOpen 0:c945b4fe9a48 56 {
MikamiUitOpen 0:c945b4fe9a48 57 DAC->DHR12RD = (val2 << 16) | val1;
MikamiUitOpen 0:c945b4fe9a48 58 DAC->SWTRIGR = swtrig_;
MikamiUitOpen 0:c945b4fe9a48 59 }
MikamiUitOpen 0:c945b4fe9a48 60
MikamiUitOpen 0:c945b4fe9a48 61 // Saturate float to an unsigned 16-bit value
MikamiUitOpen 0:c945b4fe9a48 62 uint16_t ToUint16(float val)
MikamiUitOpen 0:c945b4fe9a48 63 {
MikamiUitOpen 0:c945b4fe9a48 64 if (val < -1.0f) val = -1.0f;
MikamiUitOpen 0:c945b4fe9a48 65 if (val > 1.0f) val = 1.0f;
MikamiUitOpen 0:c945b4fe9a48 66 return (uint16_t)((val + 1.0f)*2047);
MikamiUitOpen 0:c945b4fe9a48 67 }
MikamiUitOpen 0:c945b4fe9a48 68
MikamiUitOpen 0:c945b4fe9a48 69 // Saturate to an unsigned 16-bit value
MikamiUitOpen 0:c945b4fe9a48 70 uint16_t SatUint16(uint16_t val)
MikamiUitOpen 0:c945b4fe9a48 71 { return (val > 4095) ? 4095 : val; }
MikamiUitOpen 0:c945b4fe9a48 72
MikamiUitOpen 0:c945b4fe9a48 73 // for inhibition of copy constructor
MikamiUitOpen 0:c945b4fe9a48 74 DacDual(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 75 // for inhibition of substitute operator
MikamiUitOpen 0:c945b4fe9a48 76 DacDual& operator=(const DacDual&);
MikamiUitOpen 0:c945b4fe9a48 77 };
MikamiUitOpen 0:c945b4fe9a48 78 }
MikamiUitOpen 1:6b9f2af6613d 79 #endif // F446_DAC_DUAL_HPP