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@0:ad30ac2b412b, 2018-07-03 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Jul 03 01:29:13 2018 +0000
Revision:
0:ad30ac2b412b
Child:
1:cd42ecc1e174
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:ad30ac2b412b 1 //--------------------------------------------------------
MikamiUitOpen 0:ad30ac2b412b 2 // Class for buit-in single DAC on STM32F446
MikamiUitOpen 0:ad30ac2b412b 3 //
MikamiUitOpen 0:ad30ac2b412b 4 // STM32F446 内蔵の DAC 用のクラス
MikamiUitOpen 0:ad30ac2b412b 5 // DAC_OUT1: A2 (PA_4)
MikamiUitOpen 0:ad30ac2b412b 6 // DAC_OUT2: D13 (PA_5)
MikamiUitOpen 0:ad30ac2b412b 7 //
MikamiUitOpen 0:ad30ac2b412b 8 // 2018/04/16, Copyright (c) 2018 MIKAMI, Naoki
MikamiUitOpen 0:ad30ac2b412b 9 //--------------------------------------------------------
MikamiUitOpen 0:ad30ac2b412b 10
MikamiUitOpen 0:ad30ac2b412b 11 #include "F446_DAC.hpp"
MikamiUitOpen 0:ad30ac2b412b 12
MikamiUitOpen 0:ad30ac2b412b 13 namespace Mikami
MikamiUitOpen 0:ad30ac2b412b 14 {
MikamiUitOpen 0:ad30ac2b412b 15 DacF446::DacF446(PinName pin) : da_(pin)
MikamiUitOpen 0:ad30ac2b412b 16 {
MikamiUitOpen 0:ad30ac2b412b 17 if ( (pin != A2) && (pin != D13) )
MikamiUitOpen 0:ad30ac2b412b 18 {
MikamiUitOpen 0:ad30ac2b412b 19 fprintf(stderr, "Invalid pin name\r\n");
MikamiUitOpen 0:ad30ac2b412b 20 while (true) {}
MikamiUitOpen 0:ad30ac2b412b 21 }
MikamiUitOpen 0:ad30ac2b412b 22 if (pin == A2)
MikamiUitOpen 0:ad30ac2b412b 23 {
MikamiUitOpen 0:ad30ac2b412b 24 DAC->CR = DAC_CR_EN1 | DAC_CR_TEN1 | DAC_CR_TSEL1;
MikamiUitOpen 0:ad30ac2b412b 25 fpWriteDac = &DacF446::WriteDac1;
MikamiUitOpen 0:ad30ac2b412b 26 }
MikamiUitOpen 0:ad30ac2b412b 27 else
MikamiUitOpen 0:ad30ac2b412b 28 {
MikamiUitOpen 0:ad30ac2b412b 29 DAC->CR = DAC_CR_EN2 | DAC_CR_TEN2 | DAC_CR_TSEL2;
MikamiUitOpen 0:ad30ac2b412b 30 fpWriteDac = &DacF446::WriteDac2;
MikamiUitOpen 0:ad30ac2b412b 31 }
MikamiUitOpen 0:ad30ac2b412b 32 }
MikamiUitOpen 0:ad30ac2b412b 33
MikamiUitOpen 0:ad30ac2b412b 34 // DAC の CH1 へ出力する
MikamiUitOpen 0:ad30ac2b412b 35 void DacF446::WriteDac1(uint16_t val)
MikamiUitOpen 0:ad30ac2b412b 36 {
MikamiUitOpen 0:ad30ac2b412b 37 DAC->DHR12R1 = val;
MikamiUitOpen 0:ad30ac2b412b 38 DAC->SWTRIGR = DAC_SWTRIGR_SWTRIG1;
MikamiUitOpen 0:ad30ac2b412b 39 }
MikamiUitOpen 0:ad30ac2b412b 40 // DAC の CH2 へ出力する
MikamiUitOpen 0:ad30ac2b412b 41 void DacF446::WriteDac2(uint16_t val)
MikamiUitOpen 0:ad30ac2b412b 42 {
MikamiUitOpen 0:ad30ac2b412b 43 DAC->DHR12R2 = val;
MikamiUitOpen 0:ad30ac2b412b 44 DAC->SWTRIGR = DAC_SWTRIGR_SWTRIG2;
MikamiUitOpen 0:ad30ac2b412b 45 }
MikamiUitOpen 0:ad30ac2b412b 46 }