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@13:f2b8af192558, 2014-12-19 (annotated)

Committer:
MikamiUitOpen
Date:
Fri Dec 19 06:01:15 2014 +0000
Revision:
13:f2b8af192558
Parent:
9:72fe42a4323c
Child:
15:ab7eb29b69ea
14

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 13:f2b8af192558 6 // 2014/12/19, 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 13:f2b8af192558 15 : adc_(pin1), /*PIN1_(pin1), PIN2_(pin2),
MikamiUitOpen 13:f2b8af192558 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 13:f2b8af192558 22 ch1_ = GetChannel(pin1);
MikamiUitOpen 13:f2b8af192558 23 if (pin2 != NC)
MikamiUitOpen 13:f2b8af192558 24 {
MikamiUitOpen 13:f2b8af192558 25 adc2_ = new AnalogIn(pin2);
MikamiUitOpen 13:f2b8af192558 26 ch2_ = GetChannel(pin2);
MikamiUitOpen 13:f2b8af192558 27 }
MikamiUitOpen 13:f2b8af192558 28 if (pin3 != NC)
MikamiUitOpen 13:f2b8af192558 29 {
MikamiUitOpen 13:f2b8af192558 30 adc3_ = new AnalogIn(pin3);
MikamiUitOpen 13:f2b8af192558 31 ch3_ = GetChannel(pin3);
MikamiUitOpen 13:f2b8af192558 32 }
MikamiUitOpen 0:6e0ed5adfe47 33 SetTim2(frequency);
MikamiUitOpen 0:6e0ed5adfe47 34 Select1stChannel();
MikamiUitOpen 0:6e0ed5adfe47 35 }
MikamiUitOpen 0:6e0ed5adfe47 36
MikamiUitOpen 13:f2b8af192558 37 // Extract channel number
MikamiUitOpen 13:f2b8af192558 38 uint8_t ADC_Base::GetChannel(PinName pin)
MikamiUitOpen 13:f2b8af192558 39 {
MikamiUitOpen 13:f2b8af192558 40 uint8_t ch = 0;
MikamiUitOpen 13:f2b8af192558 41 if ((pin & 0x30) == 0x00) ch = pin;
MikamiUitOpen 13:f2b8af192558 42 if ((pin & 0x30) == 0x10) ch = (pin & 0x01) + 8;
MikamiUitOpen 13:f2b8af192558 43 if ((pin & 0x30) == 0x20) ch = (pin & 0x07) + 10;
MikamiUitOpen 13:f2b8af192558 44 return ch;
MikamiUitOpen 13:f2b8af192558 45 }
MikamiUitOpen 13:f2b8af192558 46
MikamiUitOpen 0:6e0ed5adfe47 47 void ADC_Base::SetTim2(int frequency)
MikamiUitOpen 0:6e0ed5adfe47 48 {
MikamiUitOpen 0:6e0ed5adfe47 49 __TIM2_CLK_ENABLE(); // Supply clock, See "stm32f4xx_hal_rcc.h"
MikamiUitOpen 8:f933fcd30408 50
MikamiUitOpen 8:f933fcd30408 51 SystemCoreClockUpdate(); // Update core clock (for F411RE)
MikamiUitOpen 8:f933fcd30408 52 // See system_stm32f4xx.h
MikamiUitOpen 0:6e0ed5adfe47 53 TIM_TypeDef* myTim = TIM2;
MikamiUitOpen 0:6e0ed5adfe47 54
MikamiUitOpen 0:6e0ed5adfe47 55 myTim->CR2 = TIM_CR2_MMS_1; // Update event: as trigger out
MikamiUitOpen 4:6e228f373c6f 56 myTim->ARR = SystemCoreClock/frequency - 1; // Auto-reload
MikamiUitOpen 0:6e0ed5adfe47 57 myTim->PSC = 0; // Prescaler
MikamiUitOpen 0:6e0ed5adfe47 58 myTim->CR1 = TIM_CR1_CEN; // Enable TIM2
MikamiUitOpen 0:6e0ed5adfe47 59 }
MikamiUitOpen 0:6e0ed5adfe47 60 }
MikamiUitOpen 0:6e0ed5adfe47 61