CQエレクトロニクス・セミナ「実習・マイコンを動かしながら学ぶディジタル・フィルタ」で使うプログラムを,入力として STM32F746 の内蔵 ADC を使うように変更したもの. http://seminar.cqpub.co.jp/ccm/ES18-0020
Dependencies: mbed Array_Matrix BSP_DISCO_F746NG LCD_DISCO_F746NG TS_DISCO_F746NG
F764_Adc/F746_ADC.cpp@2:dd48e1e59daa, 2018-03-12 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Mon Mar 12 05:10:31 2018 +0000
- Revision:
- 2:dd48e1e59daa
- Parent:
- 0:ab7a35d87173
3
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:ab7a35d87173 | 1 | //---------------------------------------------------------- |
MikamiUitOpen | 0:ab7a35d87173 | 2 | // Simultanuous AD Conversion by polling using |
MikamiUitOpen | 0:ab7a35d87173 | 3 | // ADC1 and ADC3 on STM32F746 |
MikamiUitOpen | 0:ab7a35d87173 | 4 | // |
MikamiUitOpen | 0:ab7a35d87173 | 5 | // STM32F746 の ADC1, ADC3 を使って同時に AD 変換を開始し, |
MikamiUitOpen | 0:ab7a35d87173 | 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:ab7a35d87173 | 7 | // |
MikamiUitOpen | 0:ab7a35d87173 | 8 | // PA_0 (DISCO-F746 の A0) : ADC1 CH0 |
MikamiUitOpen | 0:ab7a35d87173 | 9 | // PF_10 (DISCO-F746 の A1) : ADC3 CH8 |
MikamiUitOpen | 0:ab7a35d87173 | 10 | // |
MikamiUitOpen | 0:ab7a35d87173 | 11 | // 2017/08/16, Copyright (c) 2017 MIKAMI, Naoki |
MikamiUitOpen | 0:ab7a35d87173 | 12 | //---------------------------------------------------------- |
MikamiUitOpen | 0:ab7a35d87173 | 13 | |
MikamiUitOpen | 0:ab7a35d87173 | 14 | #include "F746_ADC.hpp" |
MikamiUitOpen | 0:ab7a35d87173 | 15 | |
MikamiUitOpen | 0:ab7a35d87173 | 16 | namespace Mikami |
MikamiUitOpen | 0:ab7a35d87173 | 17 | { |
MikamiUitOpen | 0:ab7a35d87173 | 18 | AdcDual::AdcDual(int frequency) |
MikamiUitOpen | 0:ab7a35d87173 | 19 | { |
MikamiUitOpen | 0:ab7a35d87173 | 20 | GPIO_InitTypeDef gpioInit; |
MikamiUitOpen | 0:ab7a35d87173 | 21 | // 以下の三つのメンバの値は共通 |
MikamiUitOpen | 0:ab7a35d87173 | 22 | gpioInit.Mode = GPIO_MODE_ANALOG; |
MikamiUitOpen | 0:ab7a35d87173 | 23 | gpioInit.Pull = GPIO_NOPULL; |
MikamiUitOpen | 0:ab7a35d87173 | 24 | gpioInit.Speed = GPIO_SPEED_FREQ_VERY_HIGH; |
MikamiUitOpen | 0:ab7a35d87173 | 25 | |
MikamiUitOpen | 0:ab7a35d87173 | 26 | // PA0 を ADC 入力として使うための設定 |
MikamiUitOpen | 0:ab7a35d87173 | 27 | __HAL_RCC_GPIOA_CLK_ENABLE(); |
MikamiUitOpen | 0:ab7a35d87173 | 28 | HAL_GPIO_DeInit(GPIOA, 0); |
MikamiUitOpen | 0:ab7a35d87173 | 29 | gpioInit.Pin = GPIO_PIN_0; |
MikamiUitOpen | 0:ab7a35d87173 | 30 | HAL_GPIO_Init(GPIOA, &gpioInit); |
MikamiUitOpen | 0:ab7a35d87173 | 31 | |
MikamiUitOpen | 0:ab7a35d87173 | 32 | // PF10 を ADC 入力として使うための設定 |
MikamiUitOpen | 0:ab7a35d87173 | 33 | __HAL_RCC_GPIOF_CLK_ENABLE(); |
MikamiUitOpen | 0:ab7a35d87173 | 34 | HAL_GPIO_DeInit(GPIOF, 10); |
MikamiUitOpen | 0:ab7a35d87173 | 35 | gpioInit.Pin = GPIO_PIN_10; |
MikamiUitOpen | 0:ab7a35d87173 | 36 | HAL_GPIO_Init(GPIOF, &gpioInit); |
MikamiUitOpen | 0:ab7a35d87173 | 37 | |
MikamiUitOpen | 0:ab7a35d87173 | 38 | // ADC1 の設定 (PA0) |
MikamiUitOpen | 0:ab7a35d87173 | 39 | __HAL_RCC_ADC1_CLK_ENABLE(); |
MikamiUitOpen | 0:ab7a35d87173 | 40 | ADC1->CR1 = 0x0; |
MikamiUitOpen | 0:ab7a35d87173 | 41 | ADC1->CR2 = ADC_EXTERNALTRIGCONVEDGE_RISING // 外部トリガの立ち上がりで開始される |
MikamiUitOpen | 0:ab7a35d87173 | 42 | | ADC_EXTERNALTRIGCONV_T6_TRGO // 外部トリガ: Timer6 TRGO event |
MikamiUitOpen | 0:ab7a35d87173 | 43 | | ADC_CR2_ADON; // ADC を有効にする |
MikamiUitOpen | 0:ab7a35d87173 | 44 | ADC1->SQR3 = 0x0; // CH0 を使う |
MikamiUitOpen | 0:ab7a35d87173 | 45 | |
MikamiUitOpen | 0:ab7a35d87173 | 46 | // ADC3 の設定 (PF10) |
MikamiUitOpen | 0:ab7a35d87173 | 47 | __HAL_RCC_ADC3_CLK_ENABLE(); |
MikamiUitOpen | 0:ab7a35d87173 | 48 | ADC3->CR1 = 0x0; |
MikamiUitOpen | 0:ab7a35d87173 | 49 | ADC3->CR2 = ADC_EXTERNALTRIGCONVEDGE_RISING // 外部トリガの立ち上がりで開始される |
MikamiUitOpen | 0:ab7a35d87173 | 50 | | ADC_EXTERNALTRIGCONV_T6_TRGO // 外部トリガ: Timer6 TRGO event |
MikamiUitOpen | 0:ab7a35d87173 | 51 | | ADC_CR2_ADON; // ADC を有効にする |
MikamiUitOpen | 0:ab7a35d87173 | 52 | ADC3->SQR3 = 0x8; // CH8 を使う |
MikamiUitOpen | 0:ab7a35d87173 | 53 | |
MikamiUitOpen | 0:ab7a35d87173 | 54 | // ADC 共通の設定 |
MikamiUitOpen | 0:ab7a35d87173 | 55 | ADC->CCR = 0x0; // 念のため |
MikamiUitOpen | 0:ab7a35d87173 | 56 | |
MikamiUitOpen | 0:ab7a35d87173 | 57 | // AD 変換器の外部トリガに使うタイマ (TIM6) の設定 |
MikamiUitOpen | 0:ab7a35d87173 | 58 | SetTim6(frequency); |
MikamiUitOpen | 0:ab7a35d87173 | 59 | |
MikamiUitOpen | 0:ab7a35d87173 | 60 | // これを入れなければ動かない(理由は不明) |
MikamiUitOpen | 0:ab7a35d87173 | 61 | __DAC_CLK_ENABLE(); |
MikamiUitOpen | 0:ab7a35d87173 | 62 | // 下記と同じ処理の別表現 |
MikamiUitOpen | 0:ab7a35d87173 | 63 | // RCC->APB1ENR |= RCC_APB1ENR_DACEN; |
MikamiUitOpen | 0:ab7a35d87173 | 64 | } |
MikamiUitOpen | 0:ab7a35d87173 | 65 | |
MikamiUitOpen | 0:ab7a35d87173 | 66 | void AdcDual::Read(float &ad1, float &ad2) |
MikamiUitOpen | 0:ab7a35d87173 | 67 | { |
MikamiUitOpen | 0:ab7a35d87173 | 68 | WaitDone(); |
MikamiUitOpen | 0:ab7a35d87173 | 69 | ad1 = ToFloat(ADC1->DR); |
MikamiUitOpen | 0:ab7a35d87173 | 70 | ad2 = ToFloat(ADC3->DR); |
MikamiUitOpen | 0:ab7a35d87173 | 71 | } |
MikamiUitOpen | 0:ab7a35d87173 | 72 | |
MikamiUitOpen | 0:ab7a35d87173 | 73 | void AdcDual::Read(uint16_t &ad1, uint16_t &ad2) |
MikamiUitOpen | 0:ab7a35d87173 | 74 | { |
MikamiUitOpen | 0:ab7a35d87173 | 75 | WaitDone(); |
MikamiUitOpen | 0:ab7a35d87173 | 76 | ad1 = ADC1->DR; |
MikamiUitOpen | 0:ab7a35d87173 | 77 | ad2 = ADC3->DR; |
MikamiUitOpen | 0:ab7a35d87173 | 78 | } |
MikamiUitOpen | 0:ab7a35d87173 | 79 | |
MikamiUitOpen | 0:ab7a35d87173 | 80 | void AdcDual::SetTim6(int frequency) |
MikamiUitOpen | 0:ab7a35d87173 | 81 | { |
MikamiUitOpen | 0:ab7a35d87173 | 82 | __HAL_RCC_TIM6_CLK_ENABLE(); // Supply clock. See "stm32f7xx_hal_rcc_ex.h" |
MikamiUitOpen | 0:ab7a35d87173 | 83 | SystemCoreClockUpdate(); // Update core clock. See "system_stm32f7xx.h" |
MikamiUitOpen | 0:ab7a35d87173 | 84 | |
MikamiUitOpen | 0:ab7a35d87173 | 85 | TIM_TypeDef* const myTim = TIM6; |
MikamiUitOpen | 0:ab7a35d87173 | 86 | |
MikamiUitOpen | 0:ab7a35d87173 | 87 | myTim->CR2 = TIM_CR2_MMS_1; // Update event: as trigger out |
MikamiUitOpen | 0:ab7a35d87173 | 88 | |
MikamiUitOpen | 0:ab7a35d87173 | 89 | uint32_t psc = 0; |
MikamiUitOpen | 0:ab7a35d87173 | 90 | uint32_t arr; |
MikamiUitOpen | 0:ab7a35d87173 | 91 | while (true) |
MikamiUitOpen | 0:ab7a35d87173 | 92 | { |
MikamiUitOpen | 0:ab7a35d87173 | 93 | // TIM6 の入力のクロックは RCC_DCKCFGR1 の TIMPRE ビットにより |
MikamiUitOpen | 0:ab7a35d87173 | 94 | // 108/216 MHz のいずれかに設定される |
MikamiUitOpen | 0:ab7a35d87173 | 95 | // (RM0385 Rev.2, Reference manual では RCC_DKCFGR1 となっている) |
MikamiUitOpen | 0:ab7a35d87173 | 96 | if ((RCC->DCKCFGR1 & RCC_DCKCFGR1_TIMPRE) == RCC_DCKCFGR1_TIMPRE) |
MikamiUitOpen | 0:ab7a35d87173 | 97 | arr = SystemCoreClock/((psc + 1)*frequency); |
MikamiUitOpen | 0:ab7a35d87173 | 98 | else |
MikamiUitOpen | 0:ab7a35d87173 | 99 | arr = (SystemCoreClock/2)/((psc + 1)*frequency); |
MikamiUitOpen | 0:ab7a35d87173 | 100 | if (arr <= 65536) break; |
MikamiUitOpen | 0:ab7a35d87173 | 101 | psc++; |
MikamiUitOpen | 0:ab7a35d87173 | 102 | } |
MikamiUitOpen | 0:ab7a35d87173 | 103 | myTim->ARR = arr - 1; // Auto-reload |
MikamiUitOpen | 0:ab7a35d87173 | 104 | myTim->PSC = psc; // Prescaler |
MikamiUitOpen | 0:ab7a35d87173 | 105 | myTim->CR1 = TIM_CR1_CEN; // Enable TIM6 |
MikamiUitOpen | 0:ab7a35d87173 | 106 | } |
MikamiUitOpen | 0:ab7a35d87173 | 107 | } |