不韋 呂 / UIT_ADDA

Class library for internal ADC and DAC connected by SPI. ADC is triggered by TIM2. This library support clock generator using TIM3 for switched-capacitor filter to smooth output signal of DAC. This library includes derivative class to support interrupt occured in end of AD conversion. Slave select of SPI for DAC is generated using TIM4. Validated for ST Nucleo F401RE, F411RE.　New version. 内蔵 ADC と，SPI 接続の DAC のためのクラスライブラリ．ADC の変換開始トリガは TIM2 で発生．DAC の出力信号を平滑化するためのスイッチトキャパシタフィルタ用のクロックは TIM3 を使用．DAC の SPI 用スレーブ選択信号は TIM4 で発生．ST Nucleo F401RE，F411RE で動作を確認．新バージョン

Dependents:   UIT2_MovingAverage UIT2_AllpassReverb UIT2_CombReverb UIT2_FIR_LPF_Symmetry ... more

ADC_Base.cpp@0:6e0ed5adfe47, 2014-10-20 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Oct 20 03:01:11 2014 +0000
Revision:
0:6e0ed5adfe47
Child:
4:6e228f373c6f
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:6e0ed5adfe47 1 //------------------------------------------------------
MikamiUitOpen 0:6e0ed5adfe47 2 // Class for ADC using TIM2 trigger
MikamiUitOpen 0:6e0ed5adfe47 3 // To get bit definition for register in
MikamiUitOpen 0:6e0ed5adfe47 4 // peripheral, see "stm32f401xe.h"
MikamiUitOpen 0:6e0ed5adfe47 5 //
MikamiUitOpen 0:6e0ed5adfe47 6 // 2014/10/04, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:6e0ed5adfe47 7 //------------------------------------------------------
MikamiUitOpen 0:6e0ed5adfe47 8
MikamiUitOpen 0:6e0ed5adfe47 9 #include "ADC_Base.hpp"
MikamiUitOpen 0:6e0ed5adfe47 10
MikamiUitOpen 0:6e0ed5adfe47 11 namespace Mikami
MikamiUitOpen 0:6e0ed5adfe47 12 {
MikamiUitOpen 0:6e0ed5adfe47 13 ADC_Base::ADC_Base(PinName pin1, int frequency,
MikamiUitOpen 0:6e0ed5adfe47 14 PinName pin2, PinName pin3)
MikamiUitOpen 0:6e0ed5adfe47 15 : adc_(pin1), PIN1_(pin1), PIN2_(pin2),
MikamiUitOpen 0:6e0ed5adfe47 16 PIN3_(pin3), myAdc_(ADC1)
MikamiUitOpen 0:6e0ed5adfe47 17 {
MikamiUitOpen 0:6e0ed5adfe47 18 myAdc_->CR2 = ADC_EXTERNALTRIGCONVEDGE_RISING // External Trigger on the rising edge
MikamiUitOpen 0:6e0ed5adfe47 19 | ADC_EXTERNALTRIGCONV_T2_TRGO // Use Timer2 TRGO event
MikamiUitOpen 0:6e0ed5adfe47 20 | ADC_CR2_ADON; // Enable ADC
MikamiUitOpen 0:6e0ed5adfe47 21
MikamiUitOpen 0:6e0ed5adfe47 22 if (pin2 != NC) adc2_ = new AnalogIn(pin2);
MikamiUitOpen 0:6e0ed5adfe47 23 if (pin3 != NC) adc3_ = new AnalogIn(pin3);
MikamiUitOpen 0:6e0ed5adfe47 24 SetTim2(frequency);
MikamiUitOpen 0:6e0ed5adfe47 25 Select1stChannel();
MikamiUitOpen 0:6e0ed5adfe47 26 }
MikamiUitOpen 0:6e0ed5adfe47 27
MikamiUitOpen 0:6e0ed5adfe47 28 void ADC_Base::SetTim2(int frequency)
MikamiUitOpen 0:6e0ed5adfe47 29 {
MikamiUitOpen 0:6e0ed5adfe47 30 __TIM2_CLK_ENABLE(); // Supply clock, See "stm32f4xx_hal_rcc.h"
MikamiUitOpen 0:6e0ed5adfe47 31
MikamiUitOpen 0:6e0ed5adfe47 32 TIM_TypeDef* myTim = TIM2;
MikamiUitOpen 0:6e0ed5adfe47 33
MikamiUitOpen 0:6e0ed5adfe47 34 myTim->CR2 = TIM_CR2_MMS_1; // Update event: as trigger out
MikamiUitOpen 0:6e0ed5adfe47 35 myTim->ARR = ((SystemCoreClock)/frequency) - 1; // Auto-reload
MikamiUitOpen 0:6e0ed5adfe47 36 myTim->PSC = 0; // Prescaler
MikamiUitOpen 0:6e0ed5adfe47 37 myTim->CR1 = TIM_CR1_CEN; // Enable TIM2
MikamiUitOpen 0:6e0ed5adfe47 38 }
MikamiUitOpen 0:6e0ed5adfe47 39 }
MikamiUitOpen 0:6e0ed5adfe47 40
MikamiUitOpen 0:6e0ed5adfe47 41