不韋 呂 / F446_AD_DA_LinearPhase

Nucleo-F446RE 内蔵の AD/DA を使うためのライブラリ．DA からの出力は，標本化周波数の４倍のレートで行う．出力の補間フィルタには直線位相の FIR フィルタを使用． 　このライブラリを登録した際のプログラム： Demo_F446_AD_DA_MultirateLinearPhase. Library for built-in ADC and DAC in Nucleo-F446RE. Sampling rate for DAC is four times of that for ADC. Interpolation filter for output is linear-phase FIR filter.

Dependencies:   Array_Matrix

Dependents:   Demo_F446_AD_DA_MultirateLinearPhase

F446_DAC.cpp

Committer:
MikamiUitOpen
Date:
2018-07-03
Revision:
0:ad30ac2b412b
Child:
1:cd42ecc1e174

File content as of revision 0:ad30ac2b412b:

//--------------------------------------------------------
//  Class for buit-in single DAC on STM32F446
//
//  STM32F446 内蔵の DAC 用のクラス
//      DAC_OUT1: A2  (PA_4)
//      DAC_OUT2: D13 (PA_5)
//
//  2018/04/16, Copyright (c) 2018 MIKAMI, Naoki
//--------------------------------------------------------

#include "F446_DAC.hpp"

namespace Mikami
{
    DacF446::DacF446(PinName pin) : da_(pin)
    {
        if ( (pin != A2) && (pin != D13) )
        {
            fprintf(stderr, "Invalid pin name\r\n");
            while (true) {}
        }
        if (pin == A2)
        {
            DAC->CR = DAC_CR_EN1 | DAC_CR_TEN1 | DAC_CR_TSEL1;
            fpWriteDac = &DacF446::WriteDac1;
        }
        else
        {
            DAC->CR = DAC_CR_EN2 | DAC_CR_TEN2 | DAC_CR_TSEL2;
            fpWriteDac = &DacF446::WriteDac2;
        }
    }

    // DAC の CH1 へ出力する
    void DacF446::WriteDac1(uint16_t val)
    {
        DAC->DHR12R1 = val;
        DAC->SWTRIGR = DAC_SWTRIGR_SWTRIG1;
    }
    // DAC の CH2 へ出力する
    void DacF446::WriteDac2(uint16_t val)
    {
        DAC->DHR12R2 = val;
        DAC->SWTRIGR = DAC_SWTRIGR_SWTRIG2;
    }
}