Library for build-in ADC and DAC in STM32F446 mounted on Nucleo F446RE. Nucleo F446RE に搭載されている STM32F446 の内蔵 ADC, DAC 用のライブラリ.
Dependents: Demo_F446_AD_DA F446_MySoundMachine F446_ADF_Nlms F446_Spectrogram
F446_ADC.cpp@2:29f9831ce719, 2017-01-30 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Mon Jan 30 08:04:59 2017 +0000
- Revision:
- 2:29f9831ce719
- Parent:
- 1:6b9f2af6613d
- Child:
- 4:16667bdb8227
3
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:c945b4fe9a48 | 1 | //---------------------------------------------------------- |
MikamiUitOpen | 0:c945b4fe9a48 | 2 | // Simultanuous AD Conversion by polling using |
MikamiUitOpen | 0:c945b4fe9a48 | 3 | // ADC2 and ADC3 on STM32F446 ---- Header |
MikamiUitOpen | 0:c945b4fe9a48 | 4 | // |
MikamiUitOpen | 0:c945b4fe9a48 | 5 | // STM32F446 の ADC2, ADC3 を使って同時に AD 変換を開始し, |
MikamiUitOpen | 0:c945b4fe9a48 | 6 | // ポーリングによりアナログ信号を入力するクラス |
MikamiUitOpen | 0:c945b4fe9a48 | 7 | // A0 (PA_0) : ADC2 CH0 |
MikamiUitOpen | 0:c945b4fe9a48 | 8 | // A1 (PA_1) : ADC3 CH1 |
MikamiUitOpen | 0:c945b4fe9a48 | 9 | // |
MikamiUitOpen | 1:6b9f2af6613d | 10 | // 2016/11/12, Copyright (c) 2016 MIKAMI, Naoki |
MikamiUitOpen | 0:c945b4fe9a48 | 11 | //---------------------------------------------------------- |
MikamiUitOpen | 0:c945b4fe9a48 | 12 | |
MikamiUitOpen | 0:c945b4fe9a48 | 13 | #include "F446_ADC.hpp" |
MikamiUitOpen | 0:c945b4fe9a48 | 14 | |
MikamiUitOpen | 0:c945b4fe9a48 | 15 | namespace Mikami |
MikamiUitOpen | 0:c945b4fe9a48 | 16 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 17 | AdcDual::AdcDual(int frequency) |
MikamiUitOpen | 0:c945b4fe9a48 | 18 | { |
MikamiUitOpen | 2:29f9831ce719 | 19 | // PA0, PA1 を ADC 入力として使うための設定 |
MikamiUitOpen | 0:c945b4fe9a48 | 20 | __HAL_RCC_GPIOA_CLK_ENABLE(); |
MikamiUitOpen | 0:c945b4fe9a48 | 21 | GPIO_InitTypeDef gpioInit; |
MikamiUitOpen | 0:c945b4fe9a48 | 22 | gpioInit.Pin = GPIO_PIN_0 | GPIO_PIN_1; |
MikamiUitOpen | 0:c945b4fe9a48 | 23 | gpioInit.Mode = GPIO_MODE_ANALOG; |
MikamiUitOpen | 0:c945b4fe9a48 | 24 | gpioInit.Pull = GPIO_NOPULL; |
MikamiUitOpen | 0:c945b4fe9a48 | 25 | gpioInit.Speed = GPIO_SPEED_FREQ_VERY_HIGH; |
MikamiUitOpen | 0:c945b4fe9a48 | 26 | HAL_GPIO_Init(GPIOA, &gpioInit); |
MikamiUitOpen | 0:c945b4fe9a48 | 27 | |
MikamiUitOpen | 2:29f9831ce719 | 28 | // ADC2 の設定 (入力ポート:PA0) |
MikamiUitOpen | 0:c945b4fe9a48 | 29 | __HAL_RCC_ADC2_CLK_ENABLE(); |
MikamiUitOpen | 0:c945b4fe9a48 | 30 | ADC2->CR1 = 0x0; |
MikamiUitOpen | 0:c945b4fe9a48 | 31 | ADC2->CR2 = ADC_EXTERNALTRIGCONVEDGE_RISING // 外部トリガの立ち上がりで開始される |
MikamiUitOpen | 0:c945b4fe9a48 | 32 | | ADC_EXTERNALTRIGCONV_T8_TRGO // 外部トリガ: Timer8 TRGO event |
MikamiUitOpen | 0:c945b4fe9a48 | 33 | | ADC_CR2_ADON; // ADC を有効にする |
MikamiUitOpen | 0:c945b4fe9a48 | 34 | ADC2->SQR3 = 0x0; // CH0 を使う |
MikamiUitOpen | 0:c945b4fe9a48 | 35 | |
MikamiUitOpen | 2:29f9831ce719 | 36 | // ADC3 の設定 (入力ポート:PA1) |
MikamiUitOpen | 0:c945b4fe9a48 | 37 | __HAL_RCC_ADC3_CLK_ENABLE(); |
MikamiUitOpen | 0:c945b4fe9a48 | 38 | ADC3->CR1 = 0x0; |
MikamiUitOpen | 0:c945b4fe9a48 | 39 | ADC3->CR2 = ADC_EXTERNALTRIGCONVEDGE_RISING // 外部トリガの立ち上がりで開始される |
MikamiUitOpen | 0:c945b4fe9a48 | 40 | | ADC_EXTERNALTRIGCONV_T8_TRGO // 外部トリガ: Timer8 TRGO event |
MikamiUitOpen | 0:c945b4fe9a48 | 41 | | ADC_CR2_ADON; // ADC を有効にする |
MikamiUitOpen | 0:c945b4fe9a48 | 42 | ADC3->SQR3 = 0x1; // CH1 を使う |
MikamiUitOpen | 0:c945b4fe9a48 | 43 | |
MikamiUitOpen | 0:c945b4fe9a48 | 44 | // ADC 共通の設定 |
MikamiUitOpen | 0:c945b4fe9a48 | 45 | ADC->CCR = 0x0; // 念のため |
MikamiUitOpen | 0:c945b4fe9a48 | 46 | |
MikamiUitOpen | 0:c945b4fe9a48 | 47 | // AD 変換器の外部トリガに使うタイマ (TIM8) の設定 |
MikamiUitOpen | 0:c945b4fe9a48 | 48 | SetTim8(frequency); |
MikamiUitOpen | 0:c945b4fe9a48 | 49 | } |
MikamiUitOpen | 0:c945b4fe9a48 | 50 | |
MikamiUitOpen | 0:c945b4fe9a48 | 51 | void AdcDual::Read(float &ad1, float &ad2) |
MikamiUitOpen | 0:c945b4fe9a48 | 52 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 53 | WaitDone(); |
MikamiUitOpen | 0:c945b4fe9a48 | 54 | ad1 = ToFloat(ADC2->DR); |
MikamiUitOpen | 0:c945b4fe9a48 | 55 | ad2 = ToFloat(ADC3->DR); |
MikamiUitOpen | 0:c945b4fe9a48 | 56 | } |
MikamiUitOpen | 0:c945b4fe9a48 | 57 | |
MikamiUitOpen | 0:c945b4fe9a48 | 58 | void AdcDual::Read(uint16_t &ad1, uint16_t &ad2) |
MikamiUitOpen | 0:c945b4fe9a48 | 59 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 60 | WaitDone(); |
MikamiUitOpen | 0:c945b4fe9a48 | 61 | ad1 = ADC2->DR; |
MikamiUitOpen | 0:c945b4fe9a48 | 62 | ad2 = ADC3->DR; |
MikamiUitOpen | 0:c945b4fe9a48 | 63 | } |
MikamiUitOpen | 0:c945b4fe9a48 | 64 | |
MikamiUitOpen | 0:c945b4fe9a48 | 65 | void AdcDual::SetTim8(int frequency) |
MikamiUitOpen | 0:c945b4fe9a48 | 66 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 67 | __HAL_RCC_TIM8_CLK_ENABLE(); // Supply clock. See "stm32f4xx_hal_rcc.h" |
MikamiUitOpen | 0:c945b4fe9a48 | 68 | SystemCoreClockUpdate(); // Update core clock. See "system_stm32f4xx.h" |
MikamiUitOpen | 0:c945b4fe9a48 | 69 | TIM_TypeDef* const myTim = TIM8; |
MikamiUitOpen | 0:c945b4fe9a48 | 70 | |
MikamiUitOpen | 0:c945b4fe9a48 | 71 | myTim->CR2 = TIM_CR2_MMS_1; // Update event: as trigger out |
MikamiUitOpen | 0:c945b4fe9a48 | 72 | |
MikamiUitOpen | 0:c945b4fe9a48 | 73 | uint32_t psc = 0; |
MikamiUitOpen | 0:c945b4fe9a48 | 74 | uint16_t mul = 1; |
MikamiUitOpen | 0:c945b4fe9a48 | 75 | uint32_t arr; |
MikamiUitOpen | 0:c945b4fe9a48 | 76 | while (true) |
MikamiUitOpen | 0:c945b4fe9a48 | 77 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 78 | arr = SystemCoreClock/(mul*frequency); |
MikamiUitOpen | 0:c945b4fe9a48 | 79 | if (arr <= 65536) break; |
MikamiUitOpen | 0:c945b4fe9a48 | 80 | psc++; |
MikamiUitOpen | 0:c945b4fe9a48 | 81 | mul++; |
MikamiUitOpen | 0:c945b4fe9a48 | 82 | if (psc > 65535) |
MikamiUitOpen | 0:c945b4fe9a48 | 83 | { |
MikamiUitOpen | 0:c945b4fe9a48 | 84 | fprintf(stderr, "Sampling frequency: too low.\r\n"); |
MikamiUitOpen | 0:c945b4fe9a48 | 85 | while (true) {} |
MikamiUitOpen | 0:c945b4fe9a48 | 86 | } |
MikamiUitOpen | 0:c945b4fe9a48 | 87 | } |
MikamiUitOpen | 0:c945b4fe9a48 | 88 | myTim->ARR = arr - 1; // Auto-reload |
MikamiUitOpen | 0:c945b4fe9a48 | 89 | myTim->PSC = psc; // Prescaler |
MikamiUitOpen | 0:c945b4fe9a48 | 90 | myTim->CR1 = TIM_CR1_CEN; // Enable TIM8 |
MikamiUitOpen | 0:c945b4fe9a48 | 91 | } |
MikamiUitOpen | 1:6b9f2af6613d | 92 | } |